Patents
Patents for H03D 7 - Transference of modulation from one carrier to another, e.g. frequency-changing (7,673)
04/1999
04/28/1999EP0911963A1 Microwave mixing circuitry and down-converter
04/28/1999EP0911962A1 Cable modem tuner
04/28/1999EP0910893A2 Radio receiver
04/27/1999US5898913 Plural band converter
04/27/1999US5898909 Ultra high frequency radio communication apparatus
04/27/1999US5898906 System and method for implementing a cellular radio transmitter device
04/27/1999US5898455 Interface modules and methods for coupling combined communication signals to communication receivers
04/22/1999WO1999019991A1 Digital radio-frequency transceiver
04/21/1999EP0909485A1 Dual band transceiver
04/21/1999EP0909481A2 Receiver and filter arrangement comprising polyphase filters
04/21/1999EP0909479A1 Differential pair gain control stage
04/21/1999CN1214576A Method of sampling, downconverting, and digitizing bandpass signal using digital predictive coder
04/20/1999US5896562 Transmitter/receiver for transmitting and receiving of an RF signal in two frequency bands
04/20/1999US5896421 Use of low pass filter and equalizer for noise reduction in direct up-conversion schemes
04/15/1999WO1999018661A1 Push-pull mixer
04/15/1999WO1999018657A2 Down/up-conversion apparatus and method
04/14/1999EP0909020A1 Hyrid fiber-coax telecommunication system
04/13/1999US5894496 Method and apparatus for detecting and compensating for undesired phase shift in a radio transceiver
04/10/1999CA2246679A1 Hybrid fiber-coax telecommunication system
04/08/1999WO1999017439A1 Predistortion system and method using analog feedback loop for look-up table training
04/08/1999WO1999017376A2 Diode device having a low threshold voltage
04/08/1999WO1998054844A8 Centralized channel selection in a distributed rf antenna system
04/07/1999EP0906666A1 Printed circuit board having integrated broadside microwave coupler
04/07/1999EP0906662A1 Low voltage analog front end
04/07/1999CN1213216A Microwave mixing circuit and down-converter
04/07/1999CN1213213A High frequency apparatus
04/06/1999US5893030 Dual-function double balanced mixer circuit
04/06/1999US5893029 Baseband phase-locked direct conversion receiver with frequency offset
04/06/1999US5893025 CATV converter for receiving both analog and digital signals
04/06/1999CA2173785C Automatic frequency control circuit applicable to a mobile communication system
04/01/1999WO1999016179A2 Improvements in or relating to phasing receivers
03/1999
03/31/1999EP0905917A2 Multimode wireless communication system
03/31/1999EP0905910A2 Process and apparatus for changing frequency in a multichannel radio system
03/31/1999EP0905880A1 Device and method for the offset voltage compensation of a mixer
03/30/1999US5890060 Micro-wave mixing circuit and down-flow converter using the same
03/30/1999US5890051 On-channel transceiver architecture in a dual band mobile phone
03/30/1999CA2104182C Double conversion digital tuning system
03/25/1999WO1999014863A1 Broad band digital radio receiver for multicarrier signal
03/24/1999EP0903937A2 Digital television signal receiving tuner system
03/24/1999CN1211870A Selective RF circuit with varactor tuned bandpass switched bandpass filters
03/23/1999US5886916 Analog multiplier
03/23/1999US5886591 Device including a passive coupler circuit phase shifting through 180°
03/23/1999US5886547 Circuit and method of controlling mixer linearity
03/18/1999WO1999013592A1 Totem pole mixer having grounded serially connected stacked fet pair
03/18/1999WO1999013590A1 Rf transmitter
03/18/1999DE19841236A1 High frequency device
03/17/1999EP0902532A1 Circuit arrangement
03/17/1999CN1211324A GPS receiver and method for processing GPS signals
03/16/1999US5884214 GPS receiver and method for processing GPS signals
03/16/1999US5884154 Low noise mixer circuit having passive inductor elements
03/10/1999EP0900481A2 A frequency conversion circuit
03/09/1999US5881375 Paging transmitter having broadband exciter using an intermediate frequency above the transmit frequency
03/09/1999US5881054 Frequency division duplex transmitter which attenuates the difference between a receiving frequency an output frequency from a second oscillator
03/04/1999WO1999010756A1 Fmcw sensor
03/04/1999CA2315786A1 Fmcw sensor
03/03/1999EP0899868A1 Modulated local oscillator
03/02/1999US5878087 Signal communication device operable in a CDMA mode and an FM mode
02/1999
02/28/1999CA2245958A1 Modulated local oscillator
02/28/1999CA2243757A1 A radio frequency zero if direct down converter
02/24/1999EP0897600A1 High performance mixer structures for monolithic microwave integrated circuits
02/23/1999US5875392 Frequency mixer circuit receiving an unbalanced signal and outputting an output voltage having a minimized offset voltage
02/23/1999US5874914 GPS receiver utilizing a communication link
02/18/1999WO1999008389A2 A digital communication device and a mixer
02/18/1999WO1998040968A3 A frequency conversion circuit
02/18/1999DE19743272C1 Offset compensation arrangement for mixer
02/16/1999US5872537 Monostatic homodyne radar system
02/16/1999US5872446 Low voltage CMOS analog multiplier with extended input dynamic range
02/11/1999WO1999007122A1 Biphase modulator with balun design
02/11/1999CA2297759A1 Biphase modulator with balun design
02/10/1999EP0896425A2 Receiving apparatus for digital broadcasting
02/10/1999EP0896424A1 Time-share I-Q mixer system with distribution switch feeding in-phase and quadrature polarity inverters
02/10/1999CN1207846A Filtering in receiver that uses log-polar signal processing
02/10/1999CN1207835A Method and apparatus for selecting from multiple mixers
02/09/1999US5870670 Integrated image reject mixer
02/09/1999US5870669 Radio receiver
02/09/1999US5870668 Amplifier having distortion compensation and base station for radio communication using the same
02/04/1999DE19733079A1 Method for creating reference frequency in frequency converters
02/03/1999EP0894369A1 Distribution of radio-frequency signals through low bandwidth infrastructures
02/02/1999US5867778 Switched gain element
02/02/1999US5867535 Common transmit module for a programmable digital radio
02/02/1999US5867072 Method of balancing a microwave biphase modulator circuit
01/1999
01/28/1999WO1999004504A1 Radio communication equipment
01/27/1999EP0893887A2 Dual band radio communication apparatus
01/26/1999US5864754 System and method for radio signal reconstruction using signal processor
01/26/1999US5864255 Four quadrant square law analog multiplier using floating gate MOS transitions
01/26/1999CA2072474C Radio receiver capable of suppressing a frequency drift in an intermediate frequency
01/19/1999US5862466 Method and apparatus for automatically balancing a radio-frequency mixer
01/19/1999US5861781 Single sideband double quadrature modulator
01/12/1999US5859570 Frequency synthesizer using divided and frequency converted DDS signal as reference for PLL
01/12/1999US5859559 Mixer structures with enhanced conversion gain and reduced spurious signals
01/12/1999US5859558 Low voltage analog front end
01/12/1999CA2161352C Apparatus and method for adjusting microwave bpsk modulator and mixer
01/12/1999CA2152705C Nuclear magnetic resonance receiver, method and system
01/06/1999CN1204187A 无线电接收系统 Radio receiving system
01/05/1999US5857004 Digital data receiver
01/05/1999US5856801 Input stage for a police radar detector
12/1998
12/30/1998WO1998045942A3 Receiver and filter arrangement comprising polyphase filters
12/30/1998EP0887945A2 Filter switching system and method
12/30/1998EP0887939A2 Method of sampling, downconverting, and digitizing a bandpass signal using a digital predictive coder
12/30/1998CA2235064A1 Digital demodulator
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