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| Number | Title | Issue Date |
| 7561861 | Tuning circuit A tuning circuit of a filter is disclosed to correct a cut-off frequency of the filter. The tuning circuit comprises a current generation unit which includes a first transistor and a resistor, and a capacitor compensation unit which includes a second transistor and ... | 07/14/2009 |
| 7427907 | Boosted-bias tunable filter with dynamic calibration In a signal communication device, a frequency-selective filter has at least one component that is biased by a control signal to establish a center frequency of the frequency-selective filter. A closed-loop bias generator is provided to generate the control signal an... | 09/23/2008 |
| 7349034 | Television tuner using integrated circuit An integrated circuit is provided with a power supply terminal and an external circuit connecting terminal which is DC insulated from an internal high-frequency circuit and is connected to an external circuit. An interface is provided with an address identifying cir... | 03/25/2008 |
| 7330708 | Tuning circuit with amplitude attenuation function and integrated circuit for radio communication apparatus There is disclosed a tuning circuit having a coil and a capacitor comprises a resistance-adjustment circuit connected in parallel with the coil and the capacitor. The resistance-adjustment circuit changes a resistance of the tuning circuit when resonant. The resista... | 02/12/2008 |
| 7321735 | Optical down-converter using universal frequency translation technology A method and system for converting an optical signal to electrical information signals, including demodulated baseband information signals and modulated baseband signals at multiple harmonics. In an embodiment, the optical information signal is amplitude modulated w... | 01/22/2008 |
| 7295826 | Integrated frequency translation and selectivity with gain control functionality, and applications thereof Methods and apparatuses for frequency selectivity and frequency translation, and applications for such methods and apparatuses, are described herein. The method includes steps of filtering an input signal, and down-converting the filtered input signal. The filtering... | 11/13/2007 |
| 7295822 | Radio wave receiver, radio-controlled timepiece and tuning capacitance setting method A radio wave receiver for receiving radio waves having a predetermined frequency, the receiver comprises an antenna, an variable capacitor connected to the antenna, a memory, and a controller which determines an optimum capacitance of the variable capacitor with whi... | 11/13/2007 |
| 7292835 | Wireless and wired cable modem applications of universal frequency translation technology Frequency translation and applications of same are described herein, including cable modem applications. Such applications include, but are not limited to, frequency down-conversion, frequency up-conversion, enhanced signal reception, unified down-conversion and fil... | 11/06/2007 |
| 7266388 | Transmitting circuit and communication terminal unit therewith When a signal of GSM 900 frequency band is transmitted, a bias voltage setting circuit sets an optimum bias voltage for the GSM 900 frequency band to a first stage amplifier and a second stage amplifier. The transmission signal is amplified by the two amplifiers. A ... | 09/04/2007 |
| 7260375 | Frequency agile RF circuit A frequency agile sequential amplifier circuit that includes first and second RF amplifiers coupled by a SAW delay line, a double balanced mixer coupling the first RF amplifier to the SAW delay line, the output of the first RF amplifier providing a signal as a first... | 08/21/2007 |
| 7183880 | Discrete inductor bank and LC filter A discrete inductive-capacitive (LC) filter selects between at least two inductor banks to tune the LC filter. The filter receives an input signal that includes one or more bands of frequencies. A control signal selects a band of frequencies for processing. A first ... | 02/27/2007 |
| 7171178 | Tuning circuit having amplitude-varying function A tuning circuit having an amplitude-varying function is disclosed that comprises a coil, a capacitor, and a resistance-adjusting element connected in parallel to the coil and the capacitor for varying resistance at time of resonance of the tuning circuit, wherein t... | 01/30/2007 |
| 7146199 | Cordless digital audio headphone A cordless digital audio headphone is disclosed. The headphone includes a pair of earphones connected to a headband. The earphones provide audible signals. The headphone also includes a memory unit positioned on the headband for containing digitally stored audio inf... | 12/05/2006 |
| 7142818 | Systems and methods for reducing radio receiver interference from an on-board avionics transmitter Systems and methods for reducing interference in an enhanced radio receiver from a transmitter when both are located in the same aircraft are provided. The enhanced radio receiver detects and attenuates a signal from the transmitter, without attenuation or interfere... | 11/28/2006 |
| 7110435 | Spread spectrum applications of universal frequency translation Frequency translation and spread spectrum applications of same are described herein. Such applications include, but are not limited to, unified down-conversion and de-spreading, unified up-conversion and spreading, RAKE receivers utilizing unified down-conversion an... | 09/19/2006 |
| 7110444 | Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments and circuit implementations Frequency translation and applications of the same are described herein, including RF modem and wireless local area network (WLAN) applications. In embodiments, the WLAN invention includes an antenna, an LNA/PA module, a receiver, a transmitter, a control signal gen... | 09/19/2006 |
| 7082171 | Phase shifting applications of universal frequency translation A universal frequency translation module (UFT) frequency translates an electromagnetic (EM) input signal by sampling the EM input signal according to a periodic control signal (also called an aliasing signal). By controlling the relative sampling time, the UFT modul... | 07/25/2006 |
| 7072390 | Wireless local area network (WLAN) using universal frequency translation technology including multi-phase embodiments Frequency translation and applications of the same are described herein, including RF modem and wireless local area network (WLAN) applications. In embodiments, the WLAN invention includes an antenna, an LNA/PA module, a receiver, a transmitter, a control signal gen... | 07/04/2006 |
| 7054296 | Wireless local area network (WLAN) technology and applications including techniques of universal frequency translation Frequency translation and applications of same are described herein, including wireless local area network (WLAN) applications such as IEEE Standard 802.11 WLANs. Such applications include, but are not limited to, frequency down-conversion, frequency up-conversion, ... | 05/30/2006 |
| 7039376 | AGC amplifier circuit for use in a digital satellite broadcast receiver apparatus An AGC amplifier circuit has a fixed-gain amplifier, of which the gain is not controlled by an AGC voltage, and a variable-gain amplifier, of which the gain is controlled by the AGC voltage, that are connected in parallel. When the AGC voltage is within a predetermi... | 05/02/2006 |
| 7039372 | Method and system for frequency up-conversion with modulation embodiments A method and system is described wherein an information signals is gated at a frequency that is a sub-harmonic of the frequency of the desired output signal. In the modulation embodiments, the information signal is modulated as part of the up-conversion process. In ... | 05/02/2006 |
| 7031683 | Apparatus and methods for calibrating signal-processing circuitry A calibration circuitry includes an adjustable capacitor, a voltage generator, a reference voltage generator, and a controller. The reference voltage generator provides a reference voltage. The voltage generator provides a measurement voltage that depends on the cap... | 04/18/2006 |
| 7027786 | Carrier and clock recovery using universal frequency translation Coherent detection of a received EM signal using universal frequency translation (UFT) is described herein. The received EM signal is sampled according to a sub-harmonic LO signal, where the LO signal is in frequency and phase coherence with the received EM signal. ... | 04/11/2006 |
| 7019790 | Integrated tuner circuit and television tuner using an integrated tuner circuit An integrated tuner circuit includes a first terminal to which a UHF TV signal is input via a UHF amplifier. The amplifier is switched to an operating state when a UHF TV signal is received. A switching-voltage generation circuit includes a first switching circuit f... | 03/28/2006 |
| 7010286 | Apparatus, system, and method for down-converting and up-converting electromagnetic signals Methods, systems, and apparatuses for down-converting and up-converting an electromagnetic signal. In embodiments, the invention operates by receiving an electromagnetic signal and recursively operating on approximate half cycles of a carrier signal. The recursive o... | 03/07/2006 |
| 7006805 | Aliasing communication system with multi-mode and multi-band functionality and embodiments thereof, such as the family radio service A receiver having multi-mode and multi-band functionality and capabilities is described herein. The receiver is capable of selectively operating over a plurality of bands and channels. The receiver operates in a plurality of modes, including but not limited to a sin... | 02/28/2006 |
| 6920316 | High performance integrated circuit regulator with substrate transient suppression A regulation circuit, incorporated in a single integrated circuit with a first circuit load, which as an input coupled to a power supply which produces a source voltage, and a first output coupled to the first circuit load. The regulation circuit comprises an input ... | 07/19/2005 |
| 6624743 | Automatic adjusting responder with no self-contained power supply In a non-contact IC card, a driving portion 5 sequentially switches a resonance frequency of a resonance circuit 1. A reference voltage generating portion 6 receives an output voltage of resonance circuit 1 for outputting a prescribed reference voltage. A... | 09/23/2003 |
| 6615031 | Heterodyne stage for high-frequency receivers In a heterodyne stage having a separating filter providing broadband termination for an output of a mixer, a resistance having the value of a system impedance is arranged between the separating filter and a following intermediate-frequency filter, the res... | 09/02/2003 |
| 6553216 | RF tunable filter arrangement with tunable image trap A tuner includes a tunable filter for selecting a desired RF signal in response to a tuning control signal and a tunable image trap for rejecting the undesired image signal corresponding to the desired RF signal responsive to the tuning control signal cou... | 04/22/2003 |
| 6424824 | Apparatus for setting the tuning voltage of tunable resonant circuits A setting apparatus for setting the tuning voltage of a tunable resonant circuit has an amplification device which amplifies an oscillator tuning voltage, output by a phase locked loop, nonlinearly to produce the tuning voltage. The gain of the amplificat... | 07/23/2002 |
| 6400935 | Pilot tone detector An apparatus and method for detecting the presence of a signal component in an arbitrary signal, where the signal component has a desired frequency. The apparatus includes an error signal generator and a detector. The error signal generator has an input f... | 06/04/2002 |
| 6188970 | Method of calibrating a multistage selective amplifier In a method for calibrating or aligning a multistage selective amplifier including an oscillator circuit and at least one tuning circuit, the tuning voltages respectively necessary for aligning the respective tuning circuits to the required receiving freq... | 02/13/2001 |
| 5953642 | System for contactless power and data transmission In a system for contactless power and data transmission, a transmitting or receiving station has at least one transmitting or receiving resonant circuit which is driven by an integrable control circuit. The integrated control circuit has a multiplicity of... | 09/14/1999 |
| 5845200 | Method and an apparatus for automatically tuning a receiver An automatic tuning apparatus for a receiver has a tuning unit, a ROM and a voltage converting unit. At the time of adjustment of the tuning unit, tuning voltages are supplied to the tuning unit from a CPU and stored in the ROM as reference tuning voltage... | 12/01/1998 |
| 5808531 | Voltage-controlled variable tuning circuit A tuning circuit is formed of inductors connected in series, voltage-controlled variable capacitance means connected in parallel to the inductors, switch means connected in parallel to one of the inductors and capacitance means connected in parallel to an... | 09/15/1998 |
| 5745844 | Receiver control in a communication device by antenna de-tuning in strong signal conditions, and method therefor A communication device (100) including an antenna (110) for receiving a signal. A receiver circuit (12) is coupled to the antenna (110) and demodulates the signal which is received by the antenna (110). A signal strength measuring circuit (126) is coupled... | 04/28/1998 |
| 5742898 | Tuning system with DC-DC converter In a tuning system, a DC-DC converter DDC provides a tuning control voltage Vt for a tuner TUN. The DC-DC converter DDC is in the form of a series arrangement of an AC source CAC, an inductive element IND and a rectifier circuit REC. The AC signal provide... | 04/21/1998 |
| 5483688 | Adaptive automatic antenna tuning method and apparatus An improved method and apparatus for automatically tuning an antenna includes adaptive antenna tuning based on a current radio reception frequency and on prior antenna tuning cycles to establish a predictor value. The predictor value establishes an antenn... | 01/09/1996 |
| 5469117 | Voltage-controlled frequency oscillator An oscillator comprising an amplifier device, a capacitive divider bridge whose terminals are connected between a control electrode of the device and a reference voltage, the intermediate junction point of this bridge being connected to a principal electr... | 11/21/1995 |
