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511results about "Resonant circuit details" patented technology

Dynamic frequency tuning of electric and magnetic metamaterial response

InactiveUS20090096545A1High packing densityLow cost fabricationResonant circuit detailsSemiconductor/solid-state device manufacturingPhysicsInductor
A geometrically modifiable resonator is comprised of a resonator disposed on a substrate, and a means for geometrically modifying the resonator. The geometrically modifiable resonator can achieve active optical and / or electronic control of the frequency response in metamaterials and / or frequency selective surfaces, potentially with sub-picosecond response times. Additionally, the methods taught here can be applied to discrete geometrically modifiable circuit components such as inductors and capacitors. Principally, controlled conductivity regions, using either reversible photodoping or voltage induced depletion activation, are used to modify the geometries of circuit components, thus allowing frequency tuning of resonators without otherwise affecting the bulk substrate electrical properties. The concept is valid over any frequency range in which metamaterials are designed to operate.
Owner:TRIAD NAT SECURITY LLC

Integrated spiral inductor

An integrated receiver with channel selection and image rejection substantially implemented on a single CMOS integrated circuit is described. A receiver front end provides programable attenuation and a programable gain low noise amplifier. Frequency conversion circuitry advantageously uses LC filters integrated onto the substrate in conjunction with image reject mixers to provide sufficient image frequency rejection. Filter tuning and inductor Q compensation over temperature are performed on chip. The filters utilize multi track spiral inductors with shields to increase circuit Q. The filters are tuned using local oscillators to tune a substitute filter, and frequency scaling during filter component values to those of the filter being tuned. In conjunction with filtering, frequency planning provides additional image rejection. The advantageous choice of local oscillator signal generation methods on chip is by PLL out of band local oscillation and by direct synthesis for in band local oscillator. The VCOs in the PLLs are centered using a control circuit to center the tuning capacitance range. A differential crystal oscillator is advantageously used as a frequency reference. Differential signal transmission is advantageously used throughout the receiver. ESD protection is provided by a pad ring and ESD clamping structure that maintains signal integrity. Also provided are shunts at each pin to discharge ESD build up. The shunts utilize a gate boosting structure to provide sufficient small signal RF performance, and minimal parasitic loading.
Owner:AVAGO TECH INT SALES PTE LTD

Remote control for a television enabling a user to enter and review a channel selection choice immediately prior to sending an encoded channel selection command to the television

A handheld remote controller device that may be manually programmed while the keypad is conveniently supported in an easy to actuate and readily viewable position in front of a user. Individual keybutton entries are temporarily stored until the entry sequence is complete. Each keybutton entry may be visually displayed for review by the user. When the entry sequence is completed the remote controller device is then aimed at a remotely controlled television set, video tape or video disk player, cable or satellite signal converter. The user initiates a SEND command and the stored entries are retrieved and transmitted from the remote controller device to the receptor of the remotely controlled device as a packet of data which acts to change channel selection or accomplish other tasks in the remotely controlled device. A keybutton entry filter reduces a likelihood for accidental multiple entries which may be caused by tremors and other physical or mental maladies. In this way, physically challenged persons, or elderly persons in particular, may be enabled to utilize a remote control function with less chance for error. When only a single number channel, such as channel 5 is selected, a necessitous leading zero is automatically added to the SEND dispatched command.
Owner:HANGER SOLUTIONS LLC +1

System and method for ESD protection

An integrated receiver with channel selection and image rejection substantially implemented on a single CMOS integrated circuit is described. A receiver front end provides programable attenuation and a programable gain low noise amplifier. Frequency conversion circuitry advantageously uses LC filters integrated onto the substrate in conjunction with image reject mixers to provide sufficient image frequency rejection. Filter tuning and inductor Q compensation over temperature are performed on chip. The filters utilize multi track spiral inductors. The filters are tuned using local oscillators to tune a substitute filter, and frequency scaling during filter component values to those of the filter being tuned. In conjunction with filtering, frequency planning provides additional image rejection. The advantageous choice of local oscillator signal generation methods on chip is by PLL out of band local oscillation and by direct synthesis for in band local oscillator. The VCOs in the PLLs are centered using a control circuit to center the tuning capacitance range. A differential crystal oscillator is advantageously used as a frequency reference. Differential signal transmission is advantageously used throughout the receiver. ESD protection is provided by a pad ring and ESD clamping structure that maintains signal integrity. Also provided are shunts at each pin to discharge ESD build up. The shunts utilize a gate boosting structure to provide sufficient small signal RF performance, and minimal parasitic loading.
Owner:AVAGO TECH WIRELESS IP SINGAPORE PTE
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