135results about How to "Reduce radio frequency interference" patented technology

Each golfer (1-3) on a golf range (4) has an individual display (12-14) showing at least a predicted outcome of each of his / her shots, and a launch-analyser (6-8) to measure velocity vectors of the ball and / or club at strike for central-computation (9) of the prediction. Vibration and piezo-cable sensors (54,55;68,69) at instrumented targets (5;41-45,47) distributed throughout the range (4), detect the presence of balls arriving in their respective locations for matching with launched balls using the computed predictions and probability; active or passive radio-frequency identification and location of balls may also be used. Where a match is found, error between predicted and actual outcome is applied to adaptive correction of the prediction-computing process, and the actual outcome is displayed to the golfer instead of the prediction. Ball and / or club velocity vectors, and ball spin, at launch are measured from light changes occurring in detection planes (96,97;105;114-117;134;144-146) defined by slit apertures (94,95;104), and resulting from retro-reflection from ball (91;110;131) and / or club (130).

A luminaire diagnostic system including a lamp and a photocontroller for automatically turning the lamp on during periods of darkness and off during periods of daylight wherein the photocontroller includes detector circuitry for detecting the load drawn by the lamp, a microprocessor, responsive to detected load and programmed to predict a condition of the lamp such as a cycling event and / or lamp out condition based on the load drawn by the lamp, and an indicator such as a visual alarm for indicating the occurrence of the condition detected and / or a transmitter for transmitting the detected condition to a remote location. Also, upon cycle detection, the lamp may be turned off to prevent damage to fixture components.

A photocontroller diagnostic system including a photocontroller with a sensor for determining the presence of daylight, and a relay, responsive to the sensor, for de-energizing a lamp during periods of daylight. The diagnostic subsystem is responsive to the photocontroller, and includes a microprocessor programmed to verify the operability of the relay and / or the sensor and programmed to transmit a signal representative of the operability of the relay or the sensor.

The invention is a control system that, among other things, controls a permanent magnet alternator and provides relatively accurate voltage regulation. The control system may include one or more of the following: (1) a rectification system to rectify and regulate the output voltage of an alternator, (2) a rectifier / limiter used as an electrical power source to a boost type regulator, (3) a multimode rectifier / limiter, (4) a DC to AC inverter bridge, and (5) power switches employed in the system to minimize the switching energy that would otherwise be dissipated in the power switches as heat.

The invention is a control system that, among other things, controls a permanent magnet alternator and provides relatively accurate voltage regulation. The control system may include one or more of the following: (1) a rectification system to rectify and regulate the output voltage of an alternator, (2) a rectifier / limiter used as an electrical power source to a boost type regulator, (3) a multimode rectifier / limiter, (4) a DC to AC inverter bridge, and (5) power switches employed in the system to minimize the switching energy that would otherwise be dissipated in the power switches as heat.

An integrated circuit package comprises a cavity for housing an integrated circuit (IC) and an antenna provided as part of the package that is located substantially outside the cavity. The antenna may be located on the floor of the IC package that lies in the region outside of the IC cavity. Alternatively, the antenna may be located on the upper or lower surface of the lid sealing the IC package. The antenna may be placed in the floor or on a surface of the IC lid by forming depressions in the floor or lid surface and depositing conductive material in the depressions. The conductive material deposition may be by sputtering, evaporation, or other known physical or chemical deposition method. Antennas formed in the upper surface of an IC lid may be coupled to a pin of the IC package so that the antenna may be electrically coupled to a transceiver component on the IC within the package. Antennas formed in the lower surface of an IC lid or the floor of the IC package may be coupled by a conductive pin to a component pad of the IC within the package. To reduce electromagnetic noise that may be induced by the radio frequency signals emitted or received by an antenna, a grounding plane may be provided as part of the IC package. The grounding plane may be coupled to an electrical ground reference point through an IC package pin or the IC within the package.

A wireless repeater for receiving, amplifying and transmitting one or more wireless signals. The repeater comprises a signal processing device for determining one or more attributes of a wireless signal received from a base transceiver station and a memory for storing a reference list that includes a list of one or more preferred frequency bandwidths to be received, amplified and transmitted. The repeater further comprises a controller coupled with the signal processing device for comparing the one or more attributes of the wireless signal from the base transceiver station with the reference list, where the controller selects a first active set of one or more frequency bandwidths from the preferred frequency bandwidths based on the comparison. The repeater still further includes a first reception filter, where the first reception filter, in response to control signal(s) from the controller, filters out signals, communicated to the first reception filter, that have frequencies outside the first active set of frequency bandwidths.

A composite ignition device includes a positive electrode having a tip formed thereon that is bonded to a first insulator to form a firing cone assembly. A second insulator having a negative capacitive element embedded therein is attached to the firing cone assembly. A positive capacitive element is disposed in the second insulator and is separated from the negative capacitive element by the second insulator. The positive capacitive element is coupled to the positive electrode. The positive and negative capacitive elements form a capacitor. A resistor is coupled to the positive capacitive element. An electrical connector is coupled to the resistor and attached to the second insulator. A shell includign a negative electrode having a tip is attached to the second insulator and the firing core assembly and coupled to the negative capacitive element. The negative electrode tip is spaced apart from the positive electrode tip.

Methods and apparatuses are described herein for providing continued operation of NFC-enabled mobile devices and NFC-enabled tags. The techniques described herein relate to methods and systems using a short-range frequency-enabled tag that can be applied to a short-range frequency-enabled mobile device, resulting in the reduction of interference between the internal short-range frequency circuitry of the mobile device and the short-range frequency receiver and transmitter circuitry of the tag—particularly when communicating with other short-range frequency devices. The techniques provide the advantage of enabling use of both the internal short-range frequency capabilities of the mobile device and the short-range frequency capabilities of the tag, leading to flexible and dynamic applications that leverage both sets of features, as well as access to a wider variety of current and future applications.

The invention discloses a chip of a double-frequency radio-frequency power amplifier circuit. A radio-frequency power amplifier circuit in the chip comprises two radio-frequency power amplifier modules and two output matching networks which are positioned behind the two radio-frequency power amplifier modules and are respectively connected with the two radio-frequency power amplifier modules, outputs of the two output matching networks are connected to a high-isolation radio-frequency switch which is used for switching on or switching off the selected output matching network, the output of theoutput matching network is used as the output of the chip, output stages of the two radio-frequency power amplifier modules are arranged in parallel and in the same direction on the chip, i.e. triodes of the output stages are arranged in a parallel-strip structure way, and output directions of the two output stages on the chip are same and parallel. Last stages of the radio-frequency power amplifier circuits of two frequency ranges, i.e. radio-frequency amplifier tubes at the power output stage, are arranged in parallel and in the same direction, and therefore, the invention reduces area of the double-frequency power amplifier chip, saves the cost and lowers the radio-frequency interference between frequency ranges.

The invention discloses a camera assembly, a middle frame assembly and a mobile terminal. The camera assembly is applied to the mobile terminal, the camera assembly comprises a camera body and an antenna, wherein the camera body comprises a base, the antenna comprises a first radiator, and the first radiator is arranged on an outer side wall of the base. The camera assembly is advantaged in that reduction of radio frequency interference is facilitated, and electromagnetic interference of other components can be avoided.

A telephone to be connected to a wireline having reduced sensitivity to RF interference over a predetermined frequency range from an adjacent mobile wireless communications device may include a transmit amplifier, a receive amplifier, an audio input transducer connected to the transmit amplifier, and an audio output transducer connected to the receive amplifier. The telephone may further include an RF shield(s) surrounding the audio input transducer and the audio output transducer for reducing RF interference over the predetermined frequency range from the adjacent mobile wireless communications device. Moreover, the telephone may also include at least one RF audio input filter element connected to the audio input transducer and at least one RF audio output filter element connected to the audio output transducer, both of which are also for reducing RF interference over the predetermined frequency range from the adjacent mobile wireless communications device.

The present invention provides a radio-frequency interference processing method. The method comprises: obtaining the first signal intensity value of a first radio frequency antenna; determining whether the first signal intensity value is lower than a preset threshold or not; and when determining that the first signal intensity value lower than the preset threshold, closing the information display of the first area. According to the invention, the signal intensity value of the first radio frequency antenna located at a first area is obtained, when it is determined that the signal intensity value is lower than the preset threshold, the information display of the first area generating radio-frequency interference is closed to reduce the radio-frequency interference of a display screen module for radio frequency modules and improve the efficiency of radio frequency communication. The present invention further relates to a radio-frequency interference processing device, a storage medium and a terminal.

Narrow band RF interference in a modulated signal carried on a plurality of subchannels is carried out by detecting RF interference in the subchannels, identifying a subchannel where the magnitude of the RF interference has a predetermined characteristic, determining the value of the magnitude of the RF interference with the predetermined characteristic, determining the value of the magnitude of the RF interference in neighboring subchannels, estimating the value of the magnitude of the RF interference the remaining subchannels from the determined values, and subtracting the estimated values of the magnitude of the RF interference from the signals in the corresponding remaining subchannels.

Apparatus and methods for reducing radio frequency interference produced by switching amplifiers, includes a variable-order noise shaper in a system that includes an AM tuner. An alternative implementation involves determining the tuned frequency of a radio signal. A first sampling rate is provided at which the radio signal is to be sampled. The first sampling rate is associated with a plurality of first harmonic frequencies. A second sampling rate is also provided and is associated with a plurality of second harmonic frequencies different than the first harmonic frequencies. The method involves selectively sampling the radio signal at one of the first and second sampling rates, wherein the first sampling rate is selected when the first harmonic frequencies do not coincide with the tuned frequency, and the second sampling rate is selected when the second harmonic frequencies do not coincide with the tuned frequency. A still further alternative implementation for reducing RFI involves the second sampling rate being derived using linear interpolation.

The invention discloses a method and a device for calibrating downlink radio frequency. In the method, when a system is powered up and enters an automatic calibration state, forward power detection values of a source signal transmitted by an upstream system and feedback power detection values of a feedback signal related to the source signal are acquired for multiple times; a mean value of the forward power detection values and the feedback power detection values acquired for multiple times is calculated; and a gain value of a digital to analog converter and / or a gain value of a numerical control attenuator is regulated according to the mean value. Through the method and the device, radio frequency interference generated by an internal memory can be reduced, and the cost of the system can be reduced.

The invention provides a radio frequency interference processing method, comprising the following steps: acquiring a signal strength value of a received radio frequency signal of a radio frequency antenna; judging whether the signal strength value is less than a preset strength threshold; when determining that the signal strength value is less than the preset strength threshold, acquiring the data transmission frequency of a camera component; and performing corresponding adjustment for the data transmission frequency. According to the radio frequency interference processing method provided by the invention, the signal strength value of the received radio frequency signal of the radio frequency antenna is acquired, the data transmission frequency of the camera component is adjusted to be less than the preset safety frequency when the signal strength value is less than the preset strength threshold, and thus the radio frequency interference of the camera component to the radio frequency antenna during data transmission can be reduced, and the efficiency of radio frequency communication can be improved. The invention also provides a radio frequency interference processing device, a storage medium and a terminal.

The invention discloses an ETC system integrated with the infrared camera function, and a vehicle identification and location method. The ETC system comprises a vehicle-mounted OBU and a road-side unit. The vehicle-mounted OBU and the road-side unit are in communication through wireless signals, so that the data transfer and the payment are realized. An infrared camera is installed above the lane of the ETC and is used for capturing an infrared image of an interested region and transmitting the corresponding information to the road-side unit. The infrared image is used for acquiring the engine position of a vehicle and the profile of the vehicle. An infrared reference point is located within the interested region and is adopted as a reference during the acquiring process of the engine position and the profile of the vehicle. Based on the ETC system, by utilizing the infrared image, the type information of the vehicle can be obtained and the vehicle-mounted OBU is facilitated to be positioned. Therefore, the transaction success rate and the reliability of the ETC system are improved.

The embodiment of the invention discloses a radio-frequency interference processing method and device, a storage medium, and a terminal. The method comprises the following steps: respectively acquiring an initial first frequency band used by a first communication module in the terminal, and an initial second frequency band used by a second communication module in the terminal; judging whether a part of the initial first frequency band is overlapped with a part of the initial second frequency band or not; and if the part of the initial first frequency band is overlapped with the part of the initial second frequency band, adjusting the initial second frequency band when the first communication module in the terminal enters a communication status, so that the initial first frequency band and the adjusted initial second frequency band are staggered. The radio-frequency interference processing method and device, the storage medium and the terminal provided by the invention have the advantages that the frequency bands of the two communication modules of the dual-mode terminal can be adjusted, so that radio-frequency interference on one communication module can be reduced when a phone conversation is carried out through the other communication module, which further improves the signal quality.

Rejecting radio frequency (RF) interference in a communication system. In one aspect, rejecting RF interference includes receiving a signal on a signal path of a receiver from a communication channel, the signal including one or more received signal components having a frequency within a predetermined subset range of frequencies within an operating signal bandwidth of the receiver. The received signal components are attenuated using a notch filter to reduce RF interference obtained during transmission of the signal over the communication channel. In some embodiments, the one or more signal components have been boosted in power at a link partner transmitter connected to the communication channel.

An interface device for interfacing a pencil coil to a spark plug is provided. The interface device comprises a substantially C-shaped spring adapted to mechanically and electrically engage a pencil coil shield and also adapted to make electrical contact with a spark plug ground while the spring remains mechanically and electrically engaged to the pencil coil shield. Also provided is a pencil coil shield assembly for interfacing a pencil coil to a spark plug. The pencil coil shield assembly comprises a substantially cylindrical pencil coil and a spring. The substantially cylindrical pencil coil shield is adapted to surround the pencil coil. The spring is mechanically and electrically engaged with the pencil coil shield and is adapted to make electrical contact with a spark plug ground while the spring remains mechanically and electrically engaged to the pencil coil shield. The interface device and / or pencil coil shield assembly can be configured to reduce RFI from the secondary current winding currents of a pencil coil. In addition, each can be manufactured using inexpensive and uncomplicated manufacturing and installation techniques, and using starting materials and parts that are relatively inexpensive. Also provided is a method of reducing RFI from secondary winding currents of a pencil coil by, among other things, electrically connecting the substantially cylindrical shield to a low voltage terminal of a secondary winding of the pencil coil, and electrically connecting the substantially cylindrical shield to a spark plug ground of a spark plug associated with the pencil coil.

One object of this invention is to provide a structure of integrated power transistor device having low thermal budget metal oxynitrides as the active channel on a CMOS logic and control circuit chip to form an integrated intelligent power switching module for power switching. The other object of this invention is to provide a structure of integrated power amplifier transistor device having low thermal budget metal oxynitride active channel layer on a CMOS logic and control circuit chip to form an integrated intelligent microwave power amplifier for RF power amplification.

An in-ear audio listening device comprising a user input element, the user input element comprising a force-sensitive resistor (FSR) and a contact portion configured to receive a user input and, in turn, exert a force upon the FSR, wherein the FSR is configured to detect the force from the contact portion and generate an output for use in controlling operation of an electronic device associated with the in-ear audio listening device.

The invention provides a digital symmetrical cable and a manufacturing technology thereof. The digital symmetrical cable comprises pair-twisted groups, pair twisting shielding layers, an inner shielding layer, an insulating layer, an outer shielding layer and an outer protecting layer which are sequentially arranged from the center to the outside, wherein each pair-twisted group comprises insulating layers and two copper cores, each insulating layer is wrapped outside each copper core, and the two copper cores are pair-twisted to form the pair-twisted group; the pair twisting shielding layers are aluminium foil shielding layers; the inner shielding layer is an aluminium foil shielding layer; the insulating layer is made from extruded crosslinked polyethylene; and the outer shielding layer is a copper wire braided shielding layer. As the pair-twisted groups are respectively shielded, radio-frequency interference is lowered, and accordingly, expensive electronic equipment is not needed for reducing crosstalk. The wire pair shielding and total shielding are adopted to ensure that the cable supports high transmission rate, the integral bandwidth higher than 600MHz is provided, and the highest bandwidth can reach 1.2GHz. The digital symmetrical cable can support various applications including data, multimedia, wideband videos and CATV (Community Antenna Television) on one channel and has extremely high security.

The invention discloses a wireless sorting indicating device, system and method. The wireless sorting indicating device is deployed in the corresponding sorting area and comprises a plurality of indicating lamps with different colors as well as a wireless communication unit, a storage unit, a control unit and a driving unit; the wireless communication unit is configured to communicate with a scanning device wirelessly; the storage unit is configured to store address information of the corresponding sorting area as well as the correspondence relations between the scanning device and the colors of the indicating lamps; the control unit is configured to control the driving unit according to signals received by the wireless communication unit; and the driving unit is configured to drive the indicating lamps. According to the technical scheme, the wireless sorting indicating device is provided with the plurality of indicating lamps with the different colors, so that the problem of low sorting efficiency can be solved.

The invention provides a housing assembly and a mobile terminal. The housing assembly includes a housing, an antenna, and a shielding layer. A groove is arranged in the inner side of the housing. The antenna is arranged in the groove. The shielding layer is arranged on one side of the housing. The orthographic projection of the shielding layer on the housing covers the groove. The shielding layer is used for shielding the interference of interference signals on radio frequency signals received by the antenna. Because the antenna is arranged in the groove of the housing and is covered with the shielding layer used for shielding the interference of interference signals on radio frequency signals received by the antenna in the groove, the radio frequency interference of a mobile terminal assembly on the antenna is reduced, and the radiation performance of the antenna is enhanced.

The invention discloses a driving power source for a power system fault detecting device. The driving power source mainly comprises a diode rectifier U, a power amplifier P1, a transformer T, a switch filter circuit, a slider regulator, a power output circuit and a voltage transformation feedback circuit. The switch filter circuit is arranged between an anode output end of the diode rectifier U and a same-phase end of the power amplifier P1 in a serial connection manner, the slider regulator is connected with a sliding tap of a primary coil L1 of the transformer T, the power output circuit is connected with a secondary coil L2 of the transformer T, and the voltage transformation feedback circuit is connected with a secondary coil L3 of the transformer T. The driving power source has the advantages that high-quality input voltages can be provided for the transformer T by a novel power logic voltage stabilizing circuit, accordingly, circuit structures can be simplified, radio frequency interference of the circuits and external radio frequency interference can be reduced, and the manufacturing cost and the maintaining cost can be greatly lowered.