| Patents for H03D 7 - Transference of modulation from one carrier to another, e.g. frequency-changing (7,673) |
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| 04/08/1998 | EP0706730B1 Method and apparatus for automatic gain control and dc offset cancellation in quadrature receiver |
| 04/07/1998 | US5737035 Highly integrated television tuner on a single microcircuit |
| 04/07/1998 | US5736840 Phase shifter and communication system using the phase shifter |
| 04/01/1998 | EP0833483A2 Phase comparator for demodulator using differential detection |
| 04/01/1998 | EP0833448A2 Frequency adjusting method for use with digital receiver and frequency adjusting circuit thereof |
| 04/01/1998 | EP0833442A1 High frequency noise and impedance matched integrated circuits |
| 04/01/1998 | EP0833440A1 Low distortion large swing frequency down converter filter amplifier circuit |
| 03/31/1998 | US5734683 Demodulation of an intermediate frequency signal by a sigma-delta converter |
| 03/31/1998 | US5734295 Quadrature demodulator having active filters formed with emitter follower output stages |
| 03/30/1998 | CA2216584A1 Low distortion large swing frequency down converter filter amplifier circuit |
| 03/26/1998 | WO1998012769A1 Thick film construct for quadrature translation of rf signals |
| 03/26/1998 | CA2265810A1 Thick film construct for quadrature translation of rf signals |
| 03/25/1998 | EP0831625A2 Phase detection circuit and differential detection demodulator |
| 03/25/1998 | EP0831583A1 Microwave mixing circuit and down-converter using the same |
| 03/24/1998 | US5732345 Quasi-double balanced dual-transformer dual FET mixer, which achieves better isolation by using a first and second diplexer, and a transmission line RF balun |
| 03/24/1998 | US5732344 Additive HF mixer |
| 03/24/1998 | US5732330 Dual band transceiver |
| 03/24/1998 | US5732108 Method and apparatus for producing a difference signal between two signal frequencies, and for detection of modulation |
| 03/19/1998 | WO1998011672A1 Simplified high frequency tuner and tuning method |
| 03/19/1998 | WO1998011665A1 Method and apparatus for detecting and compensating for undesired phase shift in a radio transceiver |
| 03/18/1998 | CN1176527A Receiving mixer circuit for mobile radio transceiver designed to operate with multiple modulation modes and multiple frequency bands |
| 03/12/1998 | WO1998010511A1 Frequency conversion circuit and method for millimeter wave radio |
| 03/11/1998 | CN1175827A Small wireless radio |
| 03/10/1998 | US5727030 Automatic frequency control circuit applicable to a mobile communication system |
| 02/25/1998 | EP0825718A1 Oscillator circuit |
| 02/25/1998 | CN1174450A Direct up -conversion of digital communication signals into analog IF output signals by means of pre-distortion filter and frequency replica-selecting bandpass filater |
| 02/24/1998 | US5721500 Efficient CMOS amplifier with increased transconductance |
| 02/12/1998 | DE19708007A1 Mixer circuit for several input signals |
| 02/11/1998 | EP0823788A2 Receiving mixer circuit for mobile radio transceiver designed to operate with multiple modulation modes and multiple frequency bands |
| 02/10/1998 | US5717719 Digital radio transmission-reception apparatus |
| 02/10/1998 | US5717364 Mixer |
| 02/04/1998 | EP0822655A2 Improved low noise block downconverter |
| 02/03/1998 | US5715532 Frequency converter apparatus with distortion compensating circuit |
| 02/03/1998 | US5715530 Method for reducing spurious reception locations in homodyne receivers with time-variant carrier frequency |
| 01/29/1998 | WO1998004050A1 Compensation for second order intermodulation in a homodyne receiver |
| 01/28/1998 | EP0821241A2 Lock-in amplifier with selectable phase selectivity |
| 01/27/1998 | US5712637 Slope, drift and offset compensation in zero-IF receivers |
| 01/27/1998 | US5712628 Digitally programmable radio modules for transponder systems |
| 01/27/1998 | CA2010176C Tuner station selecting apparatus |
| 01/22/1998 | WO1998002970A1 Coplanar mixer assembly |
| 01/22/1998 | CA2231779A1 Coplanar mixer assembly |
| 01/21/1998 | EP0819338A1 In-phase and quadrature sampling circuit |
| 01/21/1998 | CN1171023A Radio selection call receiver capable of increasing receiving ratio |
| 01/20/1998 | US5711009 Method and apparatus for minimizing the effects of frequency selective fading on a PCM/FM data signal |
| 01/20/1998 | US5710997 Superheterodyne receiver apparatus |
| 01/13/1998 | US5708399 Modulator and frequency multiplier for use therein |
| 01/13/1998 | US5708383 Integrated circuit frequency controlled modulator for use in a phase lock loop |
| 01/08/1998 | WO1998000927A1 Dual band transceiver |
| 01/08/1998 | WO1998000908A1 Circuit arrangement comprising a cartesian amplifier |
| 01/08/1998 | DE19624390A1 Frequency conversion method for amplitude modulated input signal |
| 01/07/1998 | EP0817370A1 Radio communication device capable of setting a frequency channel with a small frequency step |
| 01/07/1998 | EP0817369A2 Method of up-converting and up-converter with pre-compensation filter |
| 01/07/1998 | EP0815653A1 Compensated ring mixers |
| 01/06/1998 | US5705960 Balanced-to-unbalanced converting circuit |
| 12/31/1997 | WO1997050187A1 Satellite receiver |
| 12/31/1997 | CN1169090A Multiband mobile unit communication apparatus |
| 12/30/1997 | US5703912 Clock-recovery device having cascaded resonance amplifiers |
| 12/30/1997 | US5703509 Frequency multiplier circuit |
| 12/29/1997 | EP0813770A1 Radio frequency signal reception using frequency shifting by discrete-time sub-sampling down-conversion |
| 12/29/1997 | EP0813768A1 Slope, drift and offset compensation in zero-if receivers |
| 12/24/1997 | CN1168578A Device for receiving programmes sent via satellite or MMDS station |
| 12/24/1997 | CN1168574A Digital radio communication system having reduced phase-locked loop, and its synchronization |
| 12/24/1997 | CN1168572A Radio transmitter apparatus and method |
| 12/18/1997 | WO1997048187A1 Printed circuit board having integrated broadside microwave coupler |
| 12/11/1997 | DE19616368C1 Demodulation method for single side band signal |
| 12/10/1997 | CN1167365A Circuit for frequency converting and modulating |
| 12/09/1997 | US5697096 Narrow-band communication apparatus |
| 12/09/1997 | US5697092 Floating fet mixer |
| 12/09/1997 | US5697091 Distortion-free chopper-based signal mixer |
| 12/09/1997 | US5697090 SHF converter |
| 12/09/1997 | US5697089 Local oscillator having plural oscillators facilitating channel switching |
| 12/09/1997 | US5697087 Semiconductor device with a filter formed of 3-element series-and-parallel resonators |
| 12/09/1997 | US5697085 Radio transceiver comprising an arrangement for compensating for a DC component |
| 12/09/1997 | US5696796 Continuously variable if sampling method for digital data transmission |
| 12/09/1997 | US5696792 Digital radiocommunication terminal |
| 12/09/1997 | US5696437 Intelligent low battery detection circuit for a paging receiver |
| 12/03/1997 | EP0810729A1 Frequency conversion & modulation circuits |
| 12/03/1997 | CN1166732A Multiband mobile unit communication apparatus |
| 12/03/1997 | CN1166730A Multiple-band mobile transceiver having smaller number of local oscillators |
| 12/03/1997 | CN1166728A Automatic frequency control circuit for digital radio communication system |
| 11/26/1997 | CN1166119A Frequency generator of radio communication system |
| 11/25/1997 | US5692016 Process and arrangement for adjusting the local oscillators of a receiver in a multi-channel transmission system |
| 11/25/1997 | US5691670 Integrated microwave-silicon component |
| 11/20/1997 | WO1997043797A1 High performance mixer structures for monolithic microwave integrated circuits |
| 11/18/1997 | US5689819 Transmitter-receiver |
| 11/18/1997 | US5689207 Front-end circuit |
| 11/13/1997 | DE19713902A1 IF signal output coupler for teraherz mixer |
| 11/13/1997 | DE19629555C1 Lock-in amplifier with selectable phase selectivity for very small and distorted signals |
| 11/12/1997 | EP0806088A1 Rf mixer with extended dynamic range |
| 11/11/1997 | US5686870 Mixer |
| 11/06/1997 | WO1997041644A1 Method and apparatus for mixing signals |
| 11/05/1997 | EP0805551A1 Semiconductor circuit |
| 10/30/1997 | WO1997040590A1 Distribution of radio-frequency signals through low bandwidth infrastructures |
| 10/30/1997 | DE19710490A1 Signal frequency converter circuit |
| 10/22/1997 | EP0802625A1 Unbalanced fet mixer |
| 10/22/1997 | EP0801849A1 A low voltage temperature and vcc compensated radio frequency mixer |
| 10/21/1997 | US5680078 Mixer |
| 10/21/1997 | US5680067 Frequency dividing device |
| 10/15/1997 | EP0801465A1 Radio transmitter apparatus |
| 10/15/1997 | CN1162223A Double-frequency-band receiver |