| Patents for H03D 7 - Transference of modulation from one carrier to another, e.g. frequency-changing (7,673) |
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| 03/28/1989 | US4817197 Mobile communication apparatus |
| 03/28/1989 | US4816783 Method and apparatus for quadrature modulation |
| 03/28/1989 | US4816780 Modulator comprising a comb filter |
| 03/22/1989 | EP0308273A1 Mixer |
| 03/21/1989 | US4814715 Mixer arrangement for suppression of oscillator interference in quadrature demodulators |
| 03/21/1989 | US4814649 Dual gate FET mixing apparatus with feedback means |
| 03/16/1989 | DE3734882C1 Radio-frequency mixer |
| 03/08/1989 | EP0305604A1 Receiver comprising parallel signal paths |
| 03/08/1989 | EP0305603A1 Gain and phase correction in a dual branch receiver |
| 03/08/1989 | EP0305602A1 Dual branch receiver |
| 03/08/1989 | EP0305385A1 Digital zero if selectivity section |
| 03/07/1989 | US4811426 Suspended stripline rat race mixer with simplified I. F. extraction |
| 03/07/1989 | US4811425 Apparatus for reducing the effects of local oscillator leakage in mixers employed in zero IF receivers |
| 03/07/1989 | US4810976 Frequency doubling oscillator and mixer circuit |
| 03/01/1989 | EP0304737A2 Method for reducing noise made by a mixer and mixer for carrying out the method |
| 02/22/1989 | CN1031306A Home unit for wireless digital telephone system |
| 01/31/1989 | US4801900 Image reject apparatus for signal synthesis applications |
| 01/26/1989 | WO1989000791A1 Oscillator network for radio receiver |
| 01/25/1989 | EP0300173A2 Outdoor unit low noise converter for satellite broadcast reception use |
| 01/10/1989 | US4797844 Digital mixing apparatus which attenuates the sum frequency of the mixed signals |
| 12/15/1988 | WO1988010024A1 Frequency converter circuit |
| 12/13/1988 | US4791600 Digital pipelined heterodyne circuit |
| 12/06/1988 | US4789897 Frequency converting apparatus for converting an RF television signal to a video signal employing low IF techniques |
| 12/06/1988 | US4789837 Switched capacitor mixer/multiplier |
| 11/17/1988 | WO1988009088A1 Suspended stripline rat race mixer with simplified i.f. extraction |
| 11/15/1988 | CA1244888A1 Frequency converter used for a receiver which receives signals of a uhf band or a microwave band |
| 11/02/1988 | EP0216803A4 Digital zero-if selectivity section. |
| 10/19/1988 | EP0287321A2 Monolithic double balanced single sideband modulator |
| 10/11/1988 | US4777447 Method and apparatus for a digital difference frequency mixer |
| 10/11/1988 | CA1243081A1 Simple mixer in planar congruently structure |
| 10/04/1988 | US4776039 Receiver for mobile communication systems |
| 09/21/1988 | EP0283074A1 Microwave mixer |
| 09/21/1988 | EP0282607A1 Frequency-converter for television signal |
| 09/20/1988 | CA1242274A1 Method for generating a pixel synchronizing signal in a picture input scanning apparatus and a reproduction record scanning apparatus and apparatus therefor |
| 09/06/1988 | US4769621 Frequency divider with darlington transistors |
| 08/30/1988 | US4768000 Monolithic double balanced single sideband modulator |
| 08/25/1988 | WO1988006383A1 Improved phase lock loop |
| 08/24/1988 | EP0279478A1 Modulator comprising a comb filter |
| 08/23/1988 | US4766392 Demodulating an angle-modulated signal |
| 08/10/1988 | EP0277693A2 Circuit arrangement for a mixer in a HF tuner |
| 08/10/1988 | EP0277691A2 Circuit arrangement for the coupling of a mixer to an IF oscillator |
| 08/09/1988 | CA1240368A1 Sis mixer having thin film wrap around edge contact |
| 07/27/1988 | EP0276130A2 Electrical signal mixer circuits |
| 07/26/1988 | US4760325 High frequency coil arrangement |
| 07/14/1988 | DE3718448A1 Superheterodyne receiver with useful signal feedback in an FSH system |
| 07/13/1988 | EP0274073A2 Double balanced mixer |
| 07/12/1988 | US4757276 Signal-processing circuit having a field-effect MOSFET and bipolar transistors |
| 07/06/1988 | EP0273882A2 An integrating coupling circuit for coupling a modulator to a ceramic filter, useful with amplitude modulation receivers |
| 07/05/1988 | US4755775 Microwave balun for mixers and modulators |
| 07/05/1988 | US4755761 Zero intermediate-frequency demodulator |
| 07/05/1988 | CA1238953A1 Mixer circuit |
| 07/05/1988 | CA1238952A1 Demodulation circuit |
| 06/28/1988 | US4754497 FM receivers using three-terminal negative admittance networks or two and three-terminal negative admittance networks |
| 06/14/1988 | US4751744 Monolithic distributed mixer |
| 06/07/1988 | US4750214 Digital FM demodulator using delayed signal product with arctangent |
| 05/11/1988 | DE3637827A1 Coplanar push-pull-type waveguide mixer |
| 04/19/1988 | US4739519 Coplanar microwave balun, multiplexer and mixer assemblies |
| 04/07/1988 | DE3632002A1 Cross-bar quadrature mixer |
| 04/05/1988 | CA1234873A1 Modem for rf subscriber telephone system |
| 03/22/1988 | US4733403 Digital zero IF selectivity section |
| 03/15/1988 | US4731876 VHF mixer circuit with band dependent switching |
| 03/15/1988 | US4731875 Frequency converter used for a receiver which receives signals of a UHF band or a microwave band |
| 03/10/1988 | DE3726181A1 Process for the superheterodyne reception of a modulated signal |
| 03/09/1988 | EP0259217A2 DC offset network for RF signals |
| 03/09/1988 | EP0258332A1 Method and device for converting the frequency of frequency modulated signals. |
| 03/08/1988 | CA1233887A1 Frequency converting circuit |
| 03/01/1988 | CA1233577A1 Doubly-balanced mixer termination |
| 02/25/1988 | WO1988001439A1 Dc offset network for rf signals |
| 02/24/1988 | CN86200071U Balanced mixer for 2 cm microwave slot bridge |
| 02/23/1988 | US4727597 Mixer arrangement |
| 02/23/1988 | US4727596 High dynamic range mixer |
| 02/23/1988 | US4727594 Universal land mobile receiver IF system |
| 02/23/1988 | US4727333 Circuitry for multiplying a PCM signal by a sinusoid |
| 02/16/1988 | US4726072 Double converter tuner |
| 02/11/1988 | DE3644066A1 Subscriber equipment for wireless digital telephony |
| 02/03/1988 | EP0255175A2 Demodulating an angle-modulated signal |
| 02/03/1988 | EP0254844A2 Digital pipelined heterodyne circuit |
| 02/02/1988 | US4723113 Very high frequency harmonic generator |
| 01/20/1988 | EP0253680A2 Angle modulated signal receiving apparatus |
| 01/07/1988 | EP0251703A2 Circuitry for multiplying a signal by a periodic waveform |
| 01/07/1988 | EP0251702A2 Transistor mixer |
| 01/05/1988 | US4718113 Zero-IF receiver wih feedback loop for suppressing interfering signals |
| 12/30/1987 | WO1987007991A1 Local oscillation apparatus |
| 12/15/1987 | US4713662 Modulated digital radio frequency memory |
| 12/15/1987 | US4713556 Frequency converter circuit |
| 12/08/1987 | US4712222 Adaptive recursive phase offset tracking system |
| 12/08/1987 | US4712024 Active balum star mixer |
| 12/01/1987 | US4710890 For multiplying a first and second signal and forming a product |
| 11/24/1987 | US4709410 Frequency conversion circuits |
| 11/19/1987 | WO1987007099A1 Digital zero if selectivity section |
| 11/19/1987 | EP0245337A1 Frequency doubling oscillator and mixer circuit. |
| 11/10/1987 | US4705967 Multifunction floating FET circuit |
| 11/04/1987 | EP0243733A2 Method and system for the regulation of a single side band up-converter |
| 11/03/1987 | US4704738 Transistor amplifier and mixer input stage for a radio receiver |
| 10/29/1987 | DE3613994A1 Circuit arrangement for demodulating frequency-modulated signals |
| 10/27/1987 | US4703520 Radio transceiver having an adaptive reference oscillator |
| 09/29/1987 | CA1227548A1 Active hyperfrequency filter |
| 09/22/1987 | US4696056 Frequency converting circuit |
| 09/08/1987 | US4691571 Tissue signature tracking transceiver having upconverted IF amplification |
| 09/08/1987 | CA1226627A1 Mixer arrangement comprising first and second quadrature mixer stages |