Patents
Sitemap › H03 - Basic electronic circuitry › H03C - Modulation › H03C 1 - Amplitude modulation
Patents for H03C 1 - Amplitude modulation (2,214)
08/1985
08/27/1985US4538122 Diode oscillator with independently variable frequency and power
08/06/1985US4534062 Adjustable double balanced mixer
06/1985
06/26/1985EP0146086A2 Microwave balun for mixers and modulators
06/25/1985CA1189582A1 Switched-capacitor modulator for quadrature modulation
06/25/1985CA1189574A1 Amplitude limiter for am broadcast transmitter
06/19/1985EP0145038A2 Electronic circuits and signal generator using them
06/11/1985CA1188758A1 Electronic arrangement for generating an amplitude and phase-modulated carrier signal
05/1985
05/28/1985US4520328 Amplitude modulation circuit having stable modulation characteristics
05/22/1985EP0141933A2 Integrated circuit oscillator
05/22/1985EP0141925A1 Circuit for the suppression of retarding field oscillations in electronic tubes, especially for a pulse duration modulation stage of a transmitter system
05/14/1985US4517655 Multiplier circuit for multiplying an information signal by a periodic signal
04/1985
04/17/1985EP0137121A1 Amplitude-modulated transmitter with carrier level control
04/16/1985US4511864 Modulating device for a single-sideband modulation system
04/09/1985US4510467 Switched capacitor DSB modulator/demodulator
04/09/1985US4510466 Switched capacitor SSB modulator
04/02/1985US4509202 Full-wave rectification of signals generated by radio frequency transmitting circuits
03/1985
03/26/1985US4507626 Switched capacitor SSB modulator
03/26/1985US4507625 Switched capacitor AM modulator/demodulator
03/12/1985US4504804 Switched capacitor balanced modulator/demodulator
03/12/1985US4504803 Switched capacitor AM modulator/demodulator
02/1985
02/12/1985US4499339 Amplitude modulation apparatus and method
01/1985
01/23/1985EP0131725A2 Method and circuit for compensating non linear amplitude and/or phase distortions
01/01/1985US4491972 Radio transmitter modulation control circuitry
12/1984
12/25/1984US4490689 Balanced modulator using logic gates for DSBSC output
12/18/1984US4489288 High frequency pulse generating circuit
12/18/1984CA1179736A1 Radio transmitter modulation control circuitry
12/04/1984US4486898 Amplitude limiter for AM broadcast transmitter
11/1984
11/27/1984US4485357 Circuit for amplitude and phase modulation of carrier signal by two respective input signals
11/06/1984US4481672 Polar loop transmitter
09/1984
09/26/1984EP0119627A2 Modulator circuit realized as a switched capacitor filter
09/11/1984CA1174301A1 Amplitude modulator using a variable phase square wave voltage generator
07/1984
07/04/1984EP0112410A1 Single side-band transmitter
07/03/1984US4458216 For use in a communications system
07/03/1984US4458211 Integrable signal-processing semiconductor circuit
03/1984
03/07/1984EP0102290A2 Modulator device for a microwave tube
02/1984
02/29/1984EP0101612A2 Oscillator with a dipole as the active element
02/29/1984EP0101611A2 Transmitter-receiver module
02/21/1984US4433312 Method and means for modulating waves
01/1984
01/03/1984US4424593 Suppressed carrier communications system
12/1983
12/13/1983US4420723 Phase locked loop amplifier for variable amplitude radio waves
11/1983
11/29/1983US4418319 Signal processing product circuitry
11/01/1983US4413239 Field effect transistor circuit for modulator and demodulator applications
10/1983
10/25/1983CA1155927A1 Balanced modulator
10/18/1983US4410863 Single sideband generator with leakage signal cancellation
10/11/1983US4409594 Apparatus for performing radio frequency pulse modulation with automatic modulation control
10/05/1983EP0090329A1 Amplitude modulator
08/1983
08/16/1983US4399558 Cascaded digital broadcast transmitter
08/10/1983EP0085401A1 Electronic circuitry operable with low supply voltage
08/03/1983EP0084997A1 Modulation device for a single sideband type modulation chain
07/1983
07/20/1983EP0083664A1 Amplitude modulation circuit
07/05/1983CA1149465A1 Broad-band passive ring mixer
05/1983
05/18/1983EP0078857A1 Digital amplitude modulating circuitry
04/1983
04/20/1983EP0077091A1 Multiplier circuit for stereo decoders
03/1983
03/30/1983EP0075161A1 Switched-capacitor modulator
03/16/1983EP0073929A2 Integrable signal processing semiconductor circuit
03/03/1983WO1983000782A1 Amplitude modulation circuit
02/1983
02/03/1983WO1983000411A1 Amplitude modulation circuit
12/1982
12/28/1982US4366396 Semiconductor circuit for transforming sequences of periodic a-c signals
12/23/1982WO1982004507A1 New process to generate amplitude modulated signals
12/09/1982WO1982004365A1 Radio transmitter modulation control circuitry
11/1982
11/30/1982US4361818 Balanced converter for microwave range
11/16/1982CA1135801A1 Quadrature transposition stage
10/1982
10/27/1982EP0063479A2 An amplifier for pulse width modulated signals
10/12/1982US4354200 Amplitude modulator circuit for modulating a video signal on a carrier signal
09/1982
09/28/1982US4352029 Signal processing circuitry
09/21/1982US4350962 R.F. switched amplifier and A.M. modulator
09/07/1982CA1131313A1 Magnetic modulator differentially outputting magnetic core noise
08/1982
08/24/1982US4346354 Amplitude modulator using variable width rectangular pulse generator
08/10/1982US4344188 Balanced modulator
07/1982
07/06/1982US4338580 Self balancing amplitude modulator
06/1982
06/29/1982CA1126824A1 Rf power amplifier with a modulating facility
06/22/1982CA1126354A1 Amplitude modulator
06/15/1982US4335363 Amplitude modulator using a carrier tube and a peaking tube
05/1982
05/25/1982US4331941 Digital phase domain amplitude modulation method and apparatus
04/1982
04/07/1982EP0048786A2 Variable phase square wave voltage generator
03/1982
03/23/1982US4321563 Circuit for stabilizing frequency of FET oscillator as output power varies
03/16/1982CA1120110A1 Low-distortion double sideband suppressed carrier monolithic modulator
03/09/1982US4319359 Radio transmitter energy recovery system
03/09/1982US4319204 Phase modulated square wave generator
02/1982
02/23/1982US4317230 Broad-band passive ring mixer
01/1982
01/26/1982US4313094 Modulation device for substituting for a double balanced mixer
01/19/1982US4312062 System for digitally converting baseband channel signals into a frequency-division multiplex signal and vice versa
01/12/1982US4310810 Modulator systems
12/1981
12/23/1981EP0042272A1 A pulse width modulation system
12/23/1981EP0042264A1 Circuit for supplying an amplitude modulated current to an R.F. stage of a radio transmitter
11/1981
11/25/1981EP0040274A1 Self balancing modulator and its application in a chroma demodulator
11/10/1981US4300237 Single sideband modulation
11/04/1981EP0039080A1 Transmitter for pulse-shaped high-frequency signals
11/03/1981US4298841 Signal envelope detecting system
11/03/1981CA1111914A1 Modulator
10/1981
10/13/1981US4295106 Method and means for introducing additional asymmetry into audio waves
09/1981
09/22/1981CA1109525A1 Automatic modulation control apparatus
08/1981
08/25/1981US4286336 Automatic shutdown arrangement for stand-alone television modulator
08/25/1981US4286283 Transcoder
08/25/1981US4286236 RF Power amplifier with a modulating facility
07/1981
07/14/1981US4278954 Suppressed carrier modulator using differential amplifier
06/1981
06/16/1981CA1103313A1 Am transmitter with an offset voltage to the rf stage to compensate for switching time of the modulators
06/09/1981US4272737 Pulse width modulator for amplitude modulation circuit
06/09/1981US4272724 Magnetic modulator for magnetic field detection differentially outputting magnetic core noise
05/1981
05/19/1981US4268802 Modulation distortion reducer
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