| Patents for H03B 21 - Generation of oscillations by combining unmodulated signals of different frequencies (1,067) |
|---|
| 02/24/1987 | CA1218427A1 Phase and frequency variable oscillator |
| 02/03/1987 | US4641101 Wideband, microwave regenerative divider with varactor tuning |
| 01/13/1987 | US4636733 Quaternary frequency synthesizer |
| 12/16/1986 | US4630217 Signal synthesizer system |
| 12/09/1986 | CA1215133A1 Low noise signal generator |
| 12/02/1986 | US4627100 Wide band radio receiver |
| 11/25/1986 | US4625177 Complex microwave signal generator |
| 11/18/1986 | CA1214225A1 Analog aperiodical frequency divider-by-two |
| 11/12/1986 | CA1213945A Circuit for generating a sum or differential frequency signal |
| 10/15/1986 | EP0197801A2 Method and device for quickly setting the phase of a clock signal at a predetermined value |
| 09/24/1986 | EP0195299A2 Active frequency-divider with a mixing stage and amplifier |
| 07/22/1986 | US4602220 Variable frequency synthesizer with reduced phase noise |
| 07/03/1986 | WO1986003909A1 Circuit for producing channel carrier frequencies, auxiliary pilot frequencies, system carrier frequencies and system carrier-control frequencies for multichannel carrier current telephone installations with premodulation system |
| 07/02/1986 | EP0186068A1 Circuit arrangement for the production of channel carrier frequencies, pilot auxiliary frequencies, system carrier frequencies and control frequencies for a carrier system in a multichannel carrier current telephone system with pre-modulation |
| 04/16/1986 | EP0177747A1 Comb spectrum generator |
| 02/26/1986 | EP0172560A2 Variable frequency synthesizer |
| 02/26/1986 | EP0172425A1 Signal synthesizer |
| 02/11/1986 | US4570079 rf Switching apparatus utilizing optical control signals to reduce spurious output |
| 12/10/1985 | US4558305 Multiple tone signaling device |
| 12/10/1985 | US4558283 Circuit for generating a sum or differential frequency signal |
| 12/10/1985 | US4558282 Digital frequency synthesizer |
| 12/10/1985 | CA1197901A1 Low noise microwave frequency synthesizer |
| 11/19/1985 | US4554672 Phase and frequency variable oscillator |
| 09/10/1985 | CA1193339A1 Multiple tone signaling device |
| 08/21/1985 | EP0151730A1 Radio frequency receiving apparatus |
| 08/07/1985 | EP0150560A2 Low noise signal generator |
| 05/07/1985 | US4516085 Microwave frequency synthesizer using plural switchable low noise oscillators |
| 03/19/1985 | US4506264 Frequency translator |
| 03/12/1985 | CA1183911A1 Battery saving frequency synthesizer arrangement |
| 01/15/1985 | US4494073 Frequency generator using composite digitally controlled oscillators |
| 10/23/1984 | US4479257 Superheterodyne circuit having variable bandwidth and center frequency shift function |
| 10/03/1984 | EP0120744A1 Analogous and aperiodical frequency divider by two |
| 08/28/1984 | US4468788 Digital frequency translator for offset frequency generation of unmodulated signals |
| 08/22/1984 | EP0116084A1 Low noise microwave frequency synthesizer. |
| 06/12/1984 | US4454486 Waveform synthesis using multiplexed parallel synthesizers |
| 04/03/1984 | CA1164958A1 Electronic filter for generating a third harmonic signal |
| 02/16/1984 | WO1984000648A1 Low noise microwave frequency sysnthesizer |
| 01/10/1984 | US4425552 Direct-type binary frequency synthesizer |
| 07/26/1983 | USRE31327 Proportional digital control for radio frequency synthesizers |
| 05/18/1983 | EP0078857A1 Digital amplitude modulating circuitry |
| 05/11/1983 | EP0078588A1 Method and apparatus for signal synthesis |
| 04/26/1983 | US4381461 Frequency synthesizer |
| 11/02/1982 | US4357549 Automatic frequency alteration circuit |
| 07/06/1982 | US4338528 Optimization circuit for a serrodyne frequency translator |
| 05/11/1982 | US4329651 Chirp filters/signals |
| 04/27/1982 | US4327255 Keypad caller for a telephone set |
| 04/13/1982 | US4325076 Electronic filter for generating a third harmonic signal |
| 01/26/1982 | US4313217 Frequency standard |
| 01/19/1982 | CA1116700A2 Narrow band communication system |
| 11/17/1981 | CA1112767A1 Digital frequency synthesizer |
| 06/03/1981 | EP0029574A1 Keyboard dial for an automatic telephone apparatus using analogue techniques |
| 04/14/1981 | US4262361 Variable bandwidth filtering and frequency converting system |
| 03/24/1981 | US4258436 Multichannel RF signal generator |
| 01/27/1981 | US4247822 Frequency translation means |
| 01/13/1981 | US4245193 High-Q multi-mode resonator controlled source |
| 12/16/1980 | US4240034 Digital frequency synthesizer |
| 11/26/1980 | EP0019412A1 A method of synthesizing an output frequency and circuit arrangement therefor |
| 04/15/1980 | US4198604 Heterodyne phase lock system |
| 07/11/1979 | EP0002811A1 Device for therapy with interference currents |
| 06/26/1979 | US4159526 Digitally controlled variable frequency oscillator |
| 09/05/1978 | US4112375 Tunable selective super heterodyne receiver |
| 08/15/1978 | CA1036679A1 Frequency synthesizer using spectrum shift interpolation |
| 08/08/1978 | US4105949 Frequency synthesizer apparatus |
| 07/11/1978 | US4100498 Discrete chirp frequency synthesizer |
| 04/25/1978 | US4086540 Translating filter |
| 02/15/1977 | US4008443 Quaternary frequency synthesizer |
| 02/10/1976 | US3938061 Frequency summing device |