| Patents for H03C 1 - Amplitude modulation (2,214) |
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| 09/28/1991 | CA2038811A1 Bidirectional active transmission antenna |
| 09/18/1991 | EP0447002A2 Dual path amplitude modulated RF amplifier |
| 09/16/1991 | CA2038085A1 Dual path amplitude modulated rf amplifier |
| 09/10/1991 | US5047705 Digital amplitude modulation apparatus |
| 09/04/1991 | CN1054343A Equipment and method for modulation-carrier communication |
| 08/21/1991 | EP0441836A1 Diode circuit flicker-noise reduction |
| 08/21/1991 | EP0190166B1 Rf amplifier with frequency spectrum control |
| 08/14/1991 | EP0441580A2 Circuit for reducing distortion produced by an r.f. power amplifier |
| 08/14/1991 | EP0441579A1 Circuit for reducing distortion produced by an r.f. power amplifier |
| 08/14/1991 | EP0441110A1 A method of compensating for non-linearities in an end amplifier incorporated in a radio transmitter |
| 08/07/1991 | CN1053719A Method of compensating for non-linearities in end amplifier incorporated in radio transmitter |
| 07/23/1991 | WO1991011053A1 A method of compensating for non-linearities in an end amplifier incorporated in a radio transmitter |
| 07/02/1991 | US5028890 Voltage driven microwave amplitude modulation system |
| 06/27/1991 | WO1991009432A1 Impedance-matching coupler |
| 06/19/1991 | EP0433198A1 Amplitude modulation transmission system with suppressed carrier maintaining the polarity of the transmitted signal |
| 06/19/1991 | EP0432674A2 QAM modulator with improved carrier suppression |
| 06/12/1991 | EP0431201A1 Linear transmitter |
| 05/28/1991 | US5020133 Phase/frequency modulator |
| 05/08/1991 | EP0426268A2 Modulation frequency response stabilized amplitude modulation circuit |
| 04/30/1991 | US5012208 Quadrature modulator having compensation for local oscillator leak |
| 04/16/1991 | CA1283171C Pulse width modulator for am-rf transmitter |
| 03/27/1991 | CN1012248B Method of generating amplitude-modulated isb transmission signal and apparatus for carrying out method |
| 03/13/1991 | EP0416622A2 Predistorter for linearization of electronic and optical signals |
| 03/12/1991 | WO1991003899A1 Carrier modulation without sidebands |
| 03/12/1991 | CA2066735A1 Digital amplitude modulation with zero sidebands |
| 02/19/1991 | US4994769 SSB modulation and demodulation apparatus |
| 02/12/1991 | US4992754 Predistorter for linearization of electronic and optical signals |
| 02/05/1991 | CA1279900C Amplitude modulated broadcast transmitter |
| 01/15/1991 | US4985688 Modulation system capable of accurately compensating for nonlinearities of an amplifier connected thereto |
| 01/09/1991 | EP0406423A1 Method for transmission and reception of reflex-modulated signals |
| 12/31/1990 | WO1991000653A1 Linear transmitter |
| 12/12/1990 | EP0401545A1 Power control arrangement |
| 11/27/1990 | US4974236 Arrangement for generating an SSB signal |
| 11/06/1990 | US4969145 Modem |
| 10/24/1990 | EP0394069A2 Inductive modulator system |
| 09/05/1990 | CN1009518B Single side band harmonic frequency converter for high-frequency receiving and transmitting systems |
| 09/04/1990 | US4955072 Method of generating an amplitude-modulated ISB transmission signal and apparatus for carrying out the method |
| 08/28/1990 | US4952890 Phase modulation compensated amplitude modulator using digitally selected amplifiers |
| 08/07/1990 | US4947455 RF power supply for supplying a regulated power amplified unmodulated drive signal to an RF modulator |
| 08/07/1990 | US4946243 Optical modulation element |
| 07/26/1990 | WO1990008432A1 Method for transmission and reception of reflex-modulated signals |
| 07/11/1990 | EP0377519A2 Modulation system capable of accurately compensating for nonlinearities of an amplifier connected thereto |
| 07/03/1990 | US4939483 Modulation frequency response stabilized amplitude modulation circuit |
| 07/03/1990 | US4939387 Impulse waveform drive apparatus for surface acoustic wave chirp system |
| 06/27/1990 | EP0374882A2 A hot standby transmitter switching system |
| 06/05/1990 | US4932038 Digital telecommunications repeater |
| 05/23/1990 | EP0369102A2 Modulation method and arrangement for carrying out the method |
| 05/17/1990 | WO1990005408A1 Diode circuit flicker-noise reduction |
| 05/16/1990 | CN1008039B Amplitude-modulated broadcast transmitter |
| 04/17/1990 | US4918515 Compatible television transmission system with separate preemphasis path within single channel |
| 04/11/1990 | CN1041251A Method of generating amplitude-modulated isb transmission signal and apparatus for carrying out method |
| 04/10/1990 | CA1267698A1 Circuitry for multiplying a pcm signal by a sinusoid |
| 04/04/1990 | EP0360990A1 Method for generating an amplitude-modulated ISB signal, and device for carrying out the method |
| 03/22/1990 | DE3830729A1 Method for generating modulated single-sideband signals |
| 03/07/1990 | EP0356556A1 Multi-input four quadrant multiplier |
| 02/20/1990 | US4902987 Inductive modulator system |
| 02/07/1990 | EP0354058A2 Optical modulation element |
| 01/23/1990 | US4896372 Pulse width modulator for AM-RF transmitter |
| 01/16/1990 | US4894624 Combined amplitude modulator and frequency converter |
| 12/27/1989 | EP0348163A2 Compatible television transmission system with separate pre-emphasis path within single channel |
| 12/27/1989 | CA1264066A1 Remanent subcarrier component suppressing device for balanced modulator |
| 12/26/1989 | US4890301 Arrangement for compensating errors in a quadrature modulator |
| 12/26/1989 | US4890076 Reflection type SSB modulator |
| 12/06/1989 | EP0344805A2 Switched modulator |
| 12/05/1989 | CA1263707A1 Am-rf transmitter with compensation for power supply variations |
| 10/10/1989 | US4873499 Fast rise pulse oscillator |
| 10/10/1989 | CA1262263A1 Rf-am transmitter with pulse width modulator |
| 10/04/1989 | EP0335037A1 Direct conversion radio |
| 09/19/1989 | US4868528 Ring-mounted microwave device |
| 09/12/1989 | US4866405 Amplitude modulation apparatus |
| 09/05/1989 | US4864635 Amplitude modulated broadcast transmitter |
| 08/23/1989 | EP0329077A2 SSB mixer in microstrip fashion |
| 08/23/1989 | EP0328814A1 Microwave tube modulator |
| 07/18/1989 | CA1257663A1 Angle modulated waveform synthesizer |
| 07/12/1989 | EP0323675A1 An arrangement for generating an SSB signal |
| 07/11/1989 | US4847517 Amplifying an electrical input signal |
| 06/07/1989 | EP0318516A1 Prf coherent, pulsed oscillator apparatus |
| 05/31/1989 | EP0318444A1 An arrangement for compensating errors in a quadrature modulator |
| 05/30/1989 | US4835791 Single sideband signal generator |
| 05/30/1989 | US4835493 Very wide bandwidth linear amplitude modulation of RF signal by vector summation |
| 04/18/1989 | US4823090 Digital signal synthesis using low frequency sampling clock |
| 04/18/1989 | CA1252834A1 Multifunction floating fet circuit |
| 04/06/1989 | DE3732171A1 Mixing circuit for the generation of a modulation product |
| 03/28/1989 | US4817201 Single side band harmonic frequency converter, in particular for high-frequency receiving and transmitting systems |
| 03/01/1989 | EP0304737A2 Method for reducing noise made by a mixer and mixer for carrying out the method |
| 02/21/1989 | US4806845 System for measuring and generating electric noise |
| 02/21/1989 | CA1250350A1 Signal generator producing pulses with sloping edges |
| 02/14/1989 | US4804931 Digital amplitude modulator - transmitter |
| 01/31/1989 | US4801900 Image reject apparatus for signal synthesis applications |
| 11/29/1988 | US4788513 Remanent subcarrier component suppressing device for balanced modulator |
| 11/24/1988 | DE3716065A1 Modulator for generating an audio-frequency-modulated single side band signal with suppressed carrier |
| 11/24/1988 | DE3716064A1 Modulator for generating an amplitude-keyed radio-frequency signal |
| 11/24/1988 | DE3716062A1 Modulator for generating an amplitude-modulated radio-frequency signal |
| 11/17/1988 | WO1988009089A1 Prf coherent, pulsed oscillator apparatus |
| 11/15/1988 | CA1244895A1 Single-sideband modulation method, single-sideband modulator and broadcast transmitter |
| 11/01/1988 | US4782350 Amorphous silicon varactors as rf amplitude modulators and their application to acoustic ink printers |
| 10/26/1988 | EP0288035A2 SSB modulator |
| 10/19/1988 | EP0287321A2 Monolithic double balanced single sideband modulator |
| 10/11/1988 | US4777453 Quadrature amplitude modulator using switched capacitor filter |
| 10/04/1988 | US4776036 RF-AM transmitter with pulse width modulator |