| Patents for H03C 3 - Angle modulation (3,926) |
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| 07/13/1989 | WO1989006460A1 Method and apparatus for quadrature modulation |
| 07/11/1989 | US4847571 Microwave oscillator integrated in a waveguide |
| 07/06/1989 | DE3742654A1 Method for tuning an RF modulator |
| 06/28/1989 | EP0322139A2 Frequency or phase modulation |
| 06/27/1989 | US4843351 Vector modulation signal generator |
| 06/21/1989 | EP0320598A2 Tuning method for a HF modulator |
| 06/13/1989 | US4839615 Frequency modulating circuit for video tape recorder |
| 06/07/1989 | EP0318516A1 Prf coherent, pulsed oscillator apparatus |
| 06/01/1989 | WO1989004974A1 Crystal controlled magnetron |
| 05/31/1989 | EP0318444A1 An arrangement for compensating errors in a quadrature modulator |
| 05/31/1989 | EP0318114A2 Frequency synthesizer |
| 04/12/1989 | EP0310783A2 Stabilisation method of the output frequency of a voltage-controlled oscillator, and oscillator and sensor device functioning in accordance with this method |
| 04/05/1989 | EP0310457A2 Digital premodulation filter |
| 04/05/1989 | EP0309672A2 Circuit arrangement for processing colour television signals |
| 03/28/1989 | US4816783 Method and apparatus for quadrature modulation |
| 03/28/1989 | US4816782 Modulation sensitivity correction circuit for voltage-controlled oscillator |
| 03/28/1989 | US4816781 FM modulator |
| 03/28/1989 | US4816780 Modulator comprising a comb filter |
| 03/07/1989 | US4810977 Frequency modulation in phase-locked loops |
| 03/01/1989 | EP0305164A2 Vector modulation signal generator |
| 02/28/1989 | US4809004 Radar system |
| 01/31/1989 | US4802236 Instantaneous deviation limiter with pre-emphasis and zero average value |
| 01/31/1989 | US4801898 Voltage-controlled oscillator |
| 01/26/1989 | WO1989000788A1 Improvements in or relating to oscillator phase-noise reduction |
| 01/10/1989 | US4796503 Amplification circuit for electronic tone generator |
| 12/29/1988 | DE3813865A1 Active 360@ phase shifter having continuously adjustable phase |
| 12/28/1988 | EP0296989A1 Device for adjusting the minimal and maximal frequencies of a frequency modulated video signal |
| 12/28/1988 | EP0296790A2 Frequency modulation apparatus and method |
| 12/07/1988 | CN87101170A Millimeter wave wide-band direct-frequency modulator |
| 11/24/1988 | DE3716061A1 Modulator for generating a frequency-modulated RF signal |
| 11/17/1988 | WO1988009089A1 Prf coherent, pulsed oscillator apparatus |
| 11/17/1988 | EP0290825A2 Video recorder with a dynamically tunable tuner |
| 11/02/1988 | EP0216803A4 Digital zero-if selectivity section. |
| 11/01/1988 | CA1244102A1 Single crystal frequency modulator |
| 10/12/1988 | EP0285926A2 Fine tuning method of a HF modulator and arrangement for carrying it out |
| 10/05/1988 | EP0285524A1 Device comprising a radial combiner for electromagnetic waves |
| 09/28/1988 | EP0284485A1 Microwave oscillator integrated in a waveguide |
| 08/24/1988 | EP0279561A2 A circuit for generating a frequency-modulated signal |
| 08/24/1988 | EP0279478A1 Modulator comprising a comb filter |
| 08/17/1988 | EP0278045A2 Number controlled modulated oscillator |
| 07/26/1988 | CA1239667A1 Frequency modulated transmitter applicable to mf broadcasting |
| 07/12/1988 | US4757519 Digital premodulation filter |
| 07/06/1988 | EP0273882A2 An integrating coupling circuit for coupling a modulator to a ceramic filter, useful with amplitude modulation receivers |
| 07/05/1988 | US4755774 Two-port synthesizer modulation system employing an improved reference phase modulator |
| 06/28/1988 | US4754277 Apparatus and method for producing linear frequency sweep |
| 06/28/1988 | US4754236 Frequency-doubling voltage-controlled oscillator |
| 06/21/1988 | CA1238365A1 Device for generating a frequency modulated signal |
| 06/08/1988 | CN87105936A Frequency modulation single channel per carrier oscillator |
| 05/31/1988 | US4748425 VCO range shift and modulation device |
| 05/31/1988 | CA1237477A1 Data frequency modulator with deviation control |
| 05/24/1988 | US4747159 For converting video and audio signals to modulated signal outputs |
| 05/24/1988 | US4746880 Number controlled modulated oscillator |
| 05/18/1988 | EP0267332A1 Direct FM crystal-controlled oscillator |
| 05/17/1988 | US4745566 Angle modulated waveform synthesizer |
| 05/10/1988 | US4743867 Compensation circuitry for dual port phase-locked loops |
| 04/27/1988 | EP0264960A2 An FM modulator |
| 04/19/1988 | US4739288 Combined phase and frequency modulator for modulating an information signal |
| 04/12/1988 | US4737968 QPSK transmission system having phaselocked tracking filter for spectrum shaping |
| 04/12/1988 | US4737736 Method and system for stabilizing and linearizing the output of a voltage-to-frequency converter |
| 04/05/1988 | US4736169 Voltage controlled oscillator with frequency sensitivity control |
| 03/01/1988 | US4728909 Linearly frequency-modulated high-frequency oscillator with high external Q factor |
| 02/18/1988 | DE3627435A1 Method for angle modulation of frequencies generated by means of a PLL oscillator circuit |
| 02/09/1988 | US4724405 Modulator |
| 01/26/1988 | US4721927 Voltage-controlled-oscillator with modulator |
| 01/26/1988 | US4721926 Voltage-controlled-oscillator with modulator |
| 12/22/1987 | US4714899 Frequency synthesizer |
| 12/08/1987 | US4712024 Active balum star mixer |
| 12/01/1987 | US4710970 Method of and apparatus for generating a frequency modulated ultrahigh frequency radio transmission signal |
| 11/17/1987 | US4707670 PLL stabilized frequency modulator with extended low frequency range |
| 11/10/1987 | US4706047 Frequency extended digitally generated FM |
| 11/04/1987 | EP0243573A2 Temperature responsive transmitter |
| 10/28/1987 | EP0243063A2 Angle modulator |
| 10/21/1987 | EP0242292A1 Frequency-doubling voltage-controlled oscillator |
| 10/13/1987 | US4700151 Modulation system capable of improving a transmission system |
| 10/08/1987 | DE3609205A1 Transmitting circuit |
| 09/22/1987 | US4695931 Voltage/frequency converter with frequency drift compensation loop |
| 09/22/1987 | US4695809 Microwave sweep frequency oscillator |
| 09/09/1987 | EP0235791A2 Digital phase shifter |
| 09/08/1987 | US4692766 Linearizer frequency discriminator for frequency modulated radar transmitters |
| 08/25/1987 | US4689621 Temperature responsive transmitter |
| 07/28/1987 | US4683446 PRF coherent, pulsed oscillator apparatus |
| 07/21/1987 | US4682124 Circuit including a DC-FM phase locked loop |
| 07/08/1987 | CN86108248A Method of low frequency modulation |
| 06/30/1987 | US4677395 Digital phase shifter |
| 06/24/1987 | EP0226255A2 Modulator |
| 06/24/1987 | CN85108984A 电子频率调制器 Electronic frequency modulator |
| 06/23/1987 | US4675618 Linearizer circuit for frequency modulation oscillator |
| 06/16/1987 | US4673887 Digital driver for fixed power amplifier |
| 06/02/1987 | US4670888 Frequency modulated modem transmitter |
| 05/13/1987 | EP0221608A1 Microwave oscillator linearly modulated in frequency and having a high external Q-factor |
| 04/21/1987 | US4660002 High frequency oscillator using a diode for frequency switching and FM modulation |
| 04/21/1987 | US4659999 Direct frequency synthesizer which is step-wise variable and has phase continuity and phase reproducibility when switching frequencies |
| 04/08/1987 | EP0216803A1 Digital zero-if selectivity section. |
| 03/25/1987 | EP0215651A1 A circuit including a DC-FM phase locked loop |
| 03/19/1987 | DE3531946A1 Frequency modulator with PLL stabilisation |
| 03/10/1987 | US4649353 Frequency synthesizer modulation response linearization |
| 03/04/1987 | EP0212341A2 Compensation circuit for a modulable crystal with a constant modulation slope |
| 03/03/1987 | CA1218710A1 Tunable waveguide oscillator |
| 02/24/1987 | CA1218427A1 Phase and frequency variable oscillator |
| 02/10/1987 | US4642490 Amplitude variation suppression arrangements |