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