102results about How to "Increase signal gain" patented technology

Provided is a CMOS image sensor including a pinned photodiode and a transfer transistor. The CMOS image sensor includes: a substrate; a gate electrode disposed on the substrate and electrically isolated from the substrate by a gate insulating layer; a first floating region disposed in the substrate of one side of the gate electrode; a first impurity region for a photodiode disposed in the substrate of the other side of the gate electrode; a second floating region disposed in the substrate between the first impurity region for the photodiode and the gate electrode; and a second impurity region for the photodiode disposed in a surface portion of the substrate including the first impurity region for the photodiode and the second floating region.

A semiconductor technology combines a normally off n-channel channel-junction insulated-gate field-effect transistor (“IGFET”) (104) and an n-channel surface-channel IGFET (100 or 160) to reduce low-frequency 1 / f noise. The channel-junction IGFET is normally fabricated to be of materially greater gate dielectric thickness than the surface-channel IGFET so as to operate across a greater voltage range than the surface-channel IGFET. A p-channel surface-channel IGFET (102 or 162), which is typically fabricated to be of approximately the same gate-dielectric thickness as the n-channel surface-channel IGFET, is preferably combined with the two n-channel IGFETs to produce a complementary-IGFET structure. A further p-channel IGFET (106, 180, 184, or 192), which is typically fabricated to be of approximately the same gate dielectric thickness as the n-channel channel-junction IGFET, is also preferably included. The further p-channel IGFET can be a surface-channel or channel-junction device.

A semiconductor technology combines a normally off n-channel channel-junction insulated-gate field-effect transistor (“IGFET”) (104) and an n-channel surface-channel IGFET (100 or 160) to reduce low-frequency 1 / f noise. The channel-junction IGFET is normally of materially greater gate dielectric thickness than the surface-channel IGFET so as to operate across a greater voltage range than the surface-channel IGFET. Alternatively or additionally, the channel-junction IGFET may conduct current through a field-induced surface channel. A p-channel surface-channel IGFET (102 or 162), which is typically of approximately the same gate-dielectric thickness as the n-channel surface-channel IGFET, is preferably combined with the two n-channel IGFETs to produce a complementary-IGFET structure. A further p-channel IGFET (106, 180, 184, or 192), which is typically of approximately the same gate dielectric thickness as the n-channel channel-junction IGFET, is also preferably included. The further p-channel IGFET can be a surface-channel or channel-junction device.

A radar apparatus can improve detection performance of a target, obtain high resolution without changing antenna construction, and suppress calculation load. A target detection unit, which calculates a distance, a relative speed, or a direction of the target based on frequency analysis results for a plurality of channels, includes a channel to channel integration unit that integrates, for each of the same frequencies, beat frequency spectra for the plurality of channels in the form of frequency analysis results for beat signals obtained for each of a plurality of receiving antennas, and a direction calculation unit that calculates the direction of the target from the beat frequency spectra for the plurality of channels.

A radar apparatus can improve detection performance of a target, obtain high resolution without changing antenna construction, and suppress calculation load. A target detection unit, which calculates a distance, a relative speed, or a direction of the target based on frequency analysis results for a plurality of channels, includes a channel to channel integration unit that integrates, for each of the same frequencies, beat frequency spectra for the plurality of channels in the form of frequency analysis results for beat signals obtained for each of a plurality of receiving antennas, and a direction calculation unit that calculates the direction of the target from the beat frequency spectra for the plurality of channels.

In the method and apparatus of controlling power of a transmitted communication signal, a communication signal is amplified and transmitted. At least one parameter on the transmitted signal is received, and a measure of interference with the transmitted signal is determined based on the received parameter. An average power level of the communication signal is increased by clipping the communication signal prior to amplification by an amount based on the determined measure.

The invention discloses a multi-cell wireless communication method based on an intelligent reflecting surface. The method aims at a system comprising a plurality of cooperative cells. An intelligent reflecting surface is arranged in each cooperative cell, and each cooperative cell is provided with a base station and a user terminal. The method comprises the steps that a user terminal transmits a pilot signal to a base station in each cooperative cell, and each base station estimates and shares channel state information, acquires global channel state information and formulates a transmitting beam forming model; and the intelligent reflecting surface formulates a reflected beam forming model, and obtains coefficients of transmitted beam forming and reflected beam forming through modeling andsolving, thereby forming a signal for suppressing interference. According to the method, higher signal gain can be obtained when the cell base station is far away from the corresponding user terminal, and at the same time fairness between the user terminals is considered; mutual interference between the user terminals can be effectively reduced through joint optimization of sending beam forming and reflection beam forming; and the transmission efficiency of wireless communication transmission is improved.

Systems and techniques for coherent combining radars include generating a phase and range calibration and initialization values for adjusting a time delay and a phase of a transmitted pulse from one of the radars, resulting in received composite target echoes at each of the radars having contributions from monostatic and bistatic echoes. The method further includes predicting phase and range correction values for further adjusting the time delay and the phase of subsequent radar pulses transmitted by one of the radars to continue to result in received composite target echoes at each of the radars. The method further includes coherently summing the composite target echoes.

The invention provides an optical-receiver preamplifier for receiving analog or digital optical signals. The preamplifier comprises a high-gain amplifier A1, an input circuit, a negative-feedback impedor Zf, a low-gain amplifier A2 adjustable in gain and a feedback capacitor Cff, wherein the input circuit takes a photoelectric converter as a main component; the negative-feedback impedor Zf is connected with the reverse input end and the output end of the A1; the feedback capacitor Cff connects the output end of the A2 with the reverse input end of the A1; and the output end of the A1 can be directly connected with the input end of the A2 or can be connected with the input end of the A2 through a buffer. Output signals of the preamplifier are taken out from the output end of the A1 or the output end of the buffer, and can be directly subjected to subsequent signal processing or be further amplified and then subjected to subsequent signal processing.

The provided synchronizing method for MBMS data among RNC comprises: forming a RNC group by all RNC for same MBMS business, setting one inside as the primary RNC, others as the slave ones; during synchronizing, the primary RNVC provides FP frame carried CFN uniformly to the slave RNC. This invention can be applies in mobile communication system.

A novel method and apparatus is described for reducing the number of CDMA codes for a constellation of multiple trasponder platforms serving a number of subscribers in the same service area. A coherent processing technique synchronizes the phase of CDMA signals arriving at a subscriber from multiple trasponder platforms to increase the code capacity and thus the number of possible subscribers for most of the multiple transponder platform systems in current use.

When in an optical signal amplifying triode 10, light of a second wavelength λ2, selected from among light from a first optical amplifier 26, into which a first input light L1 of a first wavelength λ1 and a second input light L2 of second wavelength λ2 have been input, and a third input light (control light) L3of a third wavelength λ3 are input into a second optical amplifier 34, an output light L4 of the third wavelength λ3, selected from among the light output from the second optical amplifier 34, is light that is modulated in response to the intensity variation of one or both of the first input light L1 of the first wavelength λ1 and the third input light L3 of the third wavelength λ3 and is an amplified signal, with which the signal gain with respect to the third input light (control light) L3 of the third wavelength λ3 is of a magnitude of 2 or more. An optical signal amplifying triode 10, which can directly perform an optical signal amplification process using control input light, can thus be provided.

In the method and apparatus of controlling power of a transmitted communication signal, a communication signal is amplified and transmitted. At least one parameter on the transmitted signal is received, and a measure of interference with the transmitted signal is determined based on the received parameter. An average power level of the communication signal is increased by clipping the communication signal prior to amplification by an amount based on the determined measure.

The invention discloses a complex moving target ISAR imaging method based on a quasi-time-frequency bilinear coherence algorithm, and the method comprises the following steps: obtaining the echo dataof a target, and carrying out the distance compression and translation compensation of an echo signal; extracting data from the signal along the distance direction, and calculating an improved cubic phase function MCPF of an extraction result; performing Radon-CPF-Fourier transform on the MCPF, and obtaining a three-dimensional data matrix in a Doppler center-polar radius-polar angle domain; and projecting the three-dimensional data matrix to a Doppler central axis along a polar radius and a polar angle, and generating a final high-resolution inverse synthetic aperture radar (ISAR) image by recombining all distance-Doppler centers. According to the method, the cross term interference suppression of a cubic phase function can be realized under the condition of no time-frequency resolution loss, the signal gain is improved, the calculation performance is improved, and a clear maneuvering target ISAR image is obtained.

The invention belongs to the technical field of optical fiber amplifiers, which more particularly relates to a two-section erbium-doped optical fiber amplifier which has two sections and can control the gain. The optical fiber amplifier comprises a two-section erbium-doped optical fiber amplifying part and a gain control part, wherein the two-section erbium-doped optical fiber amplifying part comprises a 980mn pump laser source, a two-section erbium-doped optical fiber, an optical isolator, a signal and pump multiplexer, and a signal and pump demultiplexer; the gain control part comprises the signal input and output and the power measurement of output return light, as well as a controller of the pump laser device. The two-section optical circuit structure can effectively isolate an ASE noise in counterpropagation, thus optimizing the noise isolation performance of the amplifier. The gain control part can implement the gain control and optimization of the amplifier by monitoring the output power of the pump laser device.

The invention discloses a millimeter wave micro-strip antenna and a manufacturing method thereof, relating to the technical fields of millimeter wave wireless communication and antennae. The millimeter wave micro-strip antenna comprises an antenna substrate (1) and a graphic metal film (8), wherein the antenna substrate (1) comprises a printed circuit copper-clad plate (4), lower layer epoxy resin (5), a polypropylene or polyethylene plastic layer (6) and upper layer epoxy resin (7) which are arranged from bottom to top; the graphic metal film (8) is positioned on the surface of the lower layer epoxy resin (5); and the printed circuit copper-clad plate (4) comprises an epoxy resin substrate (2) and a copper foil (3). In the invention, the substrate of the millimeter wave micro-strip antenna is manufactured by taking the printed circuit copper-clad plate which consists of the resin substrate and the copper foil on the surface of the resin substrate as well as a layer of common plastic as main bodies, so that the radiance efficiency and signal gain of the micro-strip antenna can be increased, and the cost of the antenna can be lowered.

Systems and methods for providing an antenna device for employment with conventional wireless routers and more particularly, wireless routers which perform as what is known as mobile hotspots providing network access to a plurality of wirelessly communication computing devices such as portable computers and smartphones.

A ripple current mode power converter comprised of a magnetic energy storage element, and a method of determining magnetic storage element charge duration based on periodic magnetic storage element current samples. In the preferred embodiment a controller processes a magnetic storage element ripple current, and average sampled current, to achieve high power factor forgoing the need to sense the AC signal current and voltage levels. The controller element periodically calculates the magnetic storage element charge duration to control the state of the switch element to maintain the AC input current proportional to the AC input voltage.

The invention relates to an ultrasonic planar array sensor suitable for the partial discharge detection of a transformer, which comprises 16 piezoelectric matrix elements arranged in silicone rubber filling in a stainless steel casing. The piezoelectric matrix elements are respectively connected with cables through matrix element leading wires; and a stainless steel protecting film is arranged at the bottom of the piezoelectric matrix element which is below the stainless steel casing. The ultrasonic planar array sensor can be directly arranged on the outer wall of a transformer after being provided with magnetic media and is connected with a high-speed data synchronous acquisition device through 16 cables, thereby obtaining good partial discharge ultrasonic signals, forming an array model and laying a good foundation for the realization of location algorithm based on array signal treatment.

This imaging device is equipped with an interchangeable optical system, and includes: a sensor section that has a configuration allowing nondestructive reading of a signal from each pixel; a reading section that reads a signal from the sensor section in a nondestructive manner for each pixel; a signal storage section that is able to add up and store the signals for each pixel; and a correction control section that acquires shading characteristics and controls the reading section and the signal storage section. Each pixel has an organic layer that includes a photoelectric conversion layer. On the basis of the shading characteristics, the correction control section sets the number of operations of signal reading of peripheral pixels such that the number is greater than the number of operations of signal reading of central pixels, and generates image data from the signal of each pixel stored in the signal storage section.

The invention discloses a method and a system for allocating resource to a multimedia broadcast multicast control channel, wherein the method includes: an upper level network element allocating at least one multicast subframe to the MCCH; the upper level network element transmitting MCCH resource allocation information to a lower level network element, indicating the lower level network element to transmit channel information of the MCCH in the at least one multicast subframe. The invention solves a problem of lack of consistency of allocation of physical resource to the MCCH, supports the UE to perform a combination for the received multi-cell MCH signals, enhances signal gain, and improves user experience.

The invention discloses an integrated laminated transformer based on two layers of metal, consisting of a substrate, a plurality of layers of mediums, a secondary coil and a primary coil, wherein the mediums are arranged on the substrate, and the secondary coil and the primary coil are arranged in the mediums; an upper plane of the first layer of medium, sequentially in the plurality of layers of mediums from the bottom up, is provided with two mutually isolated turns of secondary coil connected in parallel around the axial center, and one sides of parallel connection parts of the two turns of secondary coil are provided with opening grooves; an upper plane of the second layer of medium is provided with six mutually isolated turns of primary coil connected in series around the axial center; each two joint leading-out lines of the secondary coil and the primary coil are arranged side by side to separate off and lead out the opening grooves on one side of the secondary coil, wherein the each two joint leading-out lines are arranged in the same layer with the secondary coil, and the two joint leading-out lines of the primary coil are arranged between the two joint leading-out lines of the secondary coil. The integrated laminated transformer based on two layers of metal, disclosed by the invention, has the advantages of few occupied layers of metal, saved cost, high magnetic induction coefficient, strong coupling degree of signals, large bandwidth and wide application.

A low dropout (LDO) PFET regulator circuit is disclosed for operating in two modes of operation. For higher supply voltage potentials the LDO PFET regulator circuit operates normally, as supply voltage potential drops, the LDO PFET regulator operates in a second mode of operation where a decision circuit determines whether to supply a first boost current thereto in order to compensate for the reduced transimpedance of the first PFET.

The invention discloses an underground positioning method based on directive antennae. The method comprises the steps of broadcasting messages in an underground tunnel by each wireless base station through a pair of directive antennae; if a mobile terminal intercepts a message, sending each intercepted message to the wireless base station broadcasting the message; identifying two wireless base stations which are closest to the mobile terminal; sending signals comprising own position information by the two identified wireless base stations; intercepting the signals comprising the position information by the mobile terminal, computing the distances between the mobile terminal and the two wireless base stations, and positioning the position of the mobile terminal. The method has the advantage of low cost; the signal gain of the wireless base stations adopting the directive antennae is larger, the transmission distance is longer, and the number of the wireless base stations needing to be built is reduced; in addition, the judgment of the position is more accurate. When the accurate positioning of underground personnel is performed, the method is more economic, simpler and more reliable, and is applicable to the fields of underground positioning, tunnel positioning, indoor positioning and the like.