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| Number | Title | Issue Date |
| 8175566 | Multiple multi-mode low-noise amplifier receiver with shared degenerative inductors A device with multiple multi-mode low-noise amplifiers (LNAs), each with common operating modes and separate operating frequency bands, are coupled to shared degenerative inductors for common operating modes. Common load inductors are coupled to the multi-mode LNA o... | 05/08/2012 |
| 8126420 | Correcting for phase noise of an oscillator In one embodiment, the present invention includes a method for digitizing a phase noise value indicative of a level of phase noise present in a LO signal and downconverting an RF signal to a second frequency signal using the LO signal. This downconversion can cause ... | 02/28/2012 |
| 8045949 | Noise cancellation circuit and amplifier with noise cancellation circuit A noise cancellation circuit, which reduces noise in an output signal of an amplifier having an input resistance, a feedback resistance, and an operational amplifier, has: a first mixer circuit, which input an input signal across a first input terminal and a second ... | 10/25/2011 |
| 7817979 | Systems and methods for DC offset correction in a direct conversion RF receiver Systems and methods for DC offset correction in analog and digital direct conversion RF receivers. A time derivate and subsequent integration of in-phase and quadrature phase signal path components is performed to effectively remove DC offset from the resultant down... | 10/19/2010 |
| 7697915 | Gain boosting RF gain stage with cross-coupled capacitors A RF differential gain stage has cross-coupled capacitors between input and output nodes of the amplifier stage to boost gain. The gain boost allows cancellation of the series resistance of an inductive load of the amplifier stage. ... | 04/13/2010 |
| 7643814 | Reception arrangement with preamplifier circuit The invention relates to a preamplifier circuit with at least one transistor that couples a signal input to a signal output. The signal input is supplied with a radio-frequency signal. In addition, the preamplifier circuit includes a switch that switchably couples t... | 01/05/2010 |
| 7555279 | Systems and methods for DC offset correction in a direct conversion RF receiver Systems and methods for DC offset correction in analog and digital direct conversion RF receivers. A time derivate and subsequent integration of in-phase and quadrature phase signal path components is performed to effectively remove DC offset from the resultant down... | 06/30/2009 |
| 7496341 | Device and method for providing DC-offset estimation A communication system may include an equalizing device for DC-offset mitigation. The system includes: an input analog-to-digital converter configured to receive an input signal and produce a digital signal from the input signal; and a DC-offset estimation device co... | 02/24/2009 |
| 7444126 | Signal-to-noise optimized fully monolithic video receiver IF channel In a video IF channel the gain of the circuit is achieved ahead of the IF filter and the output of the filter, including its noise, need only be amplified a relatively small amount, thus preserving an acceptable signal to noise ratio. In one embodiment, a variable g... | 10/28/2008 |
| 7415256 | Received signal strength measurement circuit, received signal strength detection circuit and wireless receiver The RSSI circuit of the present invention includes: an IF amplifier section, which includes multiple stages of serially connected differential amplifiers for amplifying, with use of a current source IA provided as a power source for amplification, an IF signal corre... | 08/19/2008 |
| 7359690 | Single path front end with digital AGC in SDARS system A method and apparatus for automatically controlling the gain of a digital radio receiving circuit in which a single set of analogue amplifiers is used as the front end to feed two separate digital back-end, demodulating circuits, and in which, for optimal performan... | 04/15/2008 |
| 7353010 | Techniques for fast automatic gain control An automatic gain control (AGC) technique can quickly sense signal size over a large dynamic range by using a peak detector block in the analog portion of the receiver. The peak detector block can compare a received signal to predetermined thresholds (chosen to divi... | 04/01/2008 |
| 7349724 | Radio frequency arrangement and production method and also use A radio frequency arrangement includes a first semiconductor body having on a first side a radio frequency connection location for emitting therefrom or for supplying thereto a radio frequency signal, and a low frequency signal connection location for emitting there... | 03/25/2008 |
| 7324787 | Method of ramping up output level of power amplifier of radio communication system, communication semiconductor integrated circuit, and radio communication system In a radio communication system having a phase control loop for phase modulation and an amplitude control loop for amplitude modulation and being capable of time divisional transmission and reception under a predetermined time management, when transmission in a firs... | 01/29/2008 |
| 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 |
| 7304533 | Integrated channel filter using multiple resonant filters and method of operation A circuit includes a first filter comprising a first inductor coupled to a first variable capacitor, wherein the first filter is associated with a first resonant frequency. The circuit further comprises an amplifier coupled to the first filter and a second filter co... | 12/04/2007 |
| 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 |
| 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 |
| 7251468 | Dynamically matched mixer system with improved in-phase and quadrature (I/Q) balance and second order intercept point (IP2) performance A dynamically matched mixer system (200) for use in a direct conversion radio frequency (RF) receiver includes a frequency generator (201, 203, 205) that includes plurality of dividers (407) for providing differential local oscillator reference ... | 07/31/2007 |
| 7245894 | Radio receiver and radio signal processing method with controlling gain A radio receiver comprises a first amplifier to amplify a received radio signal; a quadrature demodulator to demodulate the radio signal amplified by said first amplifier and thereby generate a baseband signal; a second amplifier to amplify the baseband signal; a de... | 07/17/2007 |
| 7233780 | Method and apparatus for performing DC offset cancellation in a receiver An amplification system for reducing DC offset in an input signal uses a low pass filter to isolate a DC component of the input signal. The system then subtracts the DC component from the input signal. In one embodiment, the system includes first and second amplifie... | 06/19/2007 |
| 7231195 | Variable gain control circuit and receiver apparatus using the circuit Disclosed is a variable gain control circuit for executing automatic-gain-control on a variable gain amplification block composed of a plurality of amplifiers on which discrete gain setting is executed by a programmable-gain-amp method. A baseband amplifier (a varia... | 06/12/2007 |
| 7228110 | Low cost high frequency device having compact mounting area, high frequency amplification method, wireless communication device and mobile telephone including low cost and high frequency circuit having compact mounting area A high frequency device includes a transmission/reception amplifier 13 that amplifies and outputs an input signal, and a transmission/reception switch 2 that gang switches internally so that during transmission an input of the transmission/reception am... | 06/05/2007 |
| 7197292 | Chopper stabilized analog multiplier A method and circuit to eliminate an offset noise, which may be produced at or near DC (zero Hertz) in an analog, linear multiplier, is described. An input signal is chopped (converted to another frequency) by a first chopper, shifting a frequency of the input signa... | 03/27/2007 |
| 7164898 | Wireless portable device A current restriction structure for restricting a higher-harmonic-wave current generated in a digital circuit block from entering a radio circuit block and/or a radio-frequency current generated in the radio circuit block from entering the digital circuit block is d... | 01/16/2007 |
| 7164905 | High frequency module Heretofore, a plurality of packages were used in a high frequency module in which a plurality of waveguide terminals were positioned resulting in problems, such as degradation of characteristics in the connection lines between packages, lower ease of assembly when m... | 01/16/2007 |
| 7142808 | Satellite broadcast receiver apparatus intended to reduce power consumption A satellite broadcast receiver apparatus includes a plurality of signal conversion units provided corresponding to a plurality of signals transmitted from one or more satellites, each signal conversion unit frequency-converting a corresponding signal for output; a s... | 11/28/2006 |
| 7139544 | Direct down-conversion receiver with transconductance-capacitor filter and method A direct-down conversion receiver may include a transconductance-capacitor (GmC) filter to filter undesirable mixing products and provide a filtered baseband-differential signal. The GmC filter may include first and second transconductance-capacitor (GmC) circuits i... | 11/21/2006 |
| 7139542 | Method and apparatus for compensating DC level in an adaptive radio receiver A radio frequency receiver 30, 32, includes a first component block 12, 16, 18, 20; a second compensating component block 22, 22a–22b, 34; and control circuitry 26 operable for controlling the state (e.g., load, bia... | 11/21/2006 |
| 7129994 | Television tuner having level of harmonics of oscillation signal suppressed low The level of the harmonics of oscillation signals for synchronous detection to be inputted to a mixer circuit for converting frequencies is suppressed low. A first integrated circuit component formed with a first mixer circuit for converting frequencies; a second in... | 10/31/2006 |
| 7130597 | Receiver having high-frequency amplifier circuit portions integrally formed on a semiconductor substrate A receiver capable of reducing a low-frequency noise generated when a component is integrally formed on a semiconductor substrate by using CMOS process or MOS process. A high-frequency amplifier circuit 11, a mixing circuit 12, a local oscillator 13... | 10/31/2006 |
| 7130606 | Integrated semiconductor mixer An integrated semiconductor mixer includes a substrate (10), a radio-frequency balun (12) disposed on the substrate (10), a local oscillator balun (14) disposed on the substrate (10), an intermediate-frequency port (16) disp... | 10/31/2006 |
| 7123895 | Method and system for implementing a communications transceiver using modified GPS user equipment A communications transceiver is implemented by modifying a GPS user equipment. In a data reception mode, a communications signal that has a carrier frequency outside the L-band, and that has been phase modulated by a PN code and by data encoded therein, is received ... | 10/17/2006 |
| 7123894 | Dynamic range extension system and method A digital radio frequency receiver capable of receiving RF signals at a plurality of signal strengths thereby extending the dynamic range of the receiver without introducing a control loop while allowing a stable gain control algorithm to be implemented in software ... | 10/17/2006 |
| 7116165 | Front stage amplifier with different modes A multimode front stage amplifier and method of amplifying a signal having an optimum signal output for weak signals as well as for strong signals provided for TV tuners. A product having a multimode front stage amplifier and provisions for selecting different modes... | 10/03/2006 |
| 7113539 | Method and apparatus for performing bandedge equalization A method and apparatus for performing bandedge equalization. Specifically, the apparatus contains a pre-equalizer for adjusting the amplitudes of the bandedges of a broadband signal in response to a control signal. A bandedge filter is connected to the pre-equalizer... | 09/26/2006 |
| 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 |
| 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 |
| 7107035 | Frequency converter and radio communication apparatus A frequency converter comprises an impedance matching unit connected to a current switching stage and a transconductance amplifier stage. The impedance matching unit has an impedance for conjugate power match. For example, the impedance matching unit is a parallel r... | 09/12/2006 |
| 7095997 | Direct-conversion receiver for a communication system using a modulation with non-constant envelope A direct-conversion receiver includes an analog stage for receiving an incident signal from a transmission channel, mixers and programmable-gain amplifiers. The receiver further includes at least one compensation module having input and output terminals respectively... | 08/22/2006 |
