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Swanson Hilmer I: Progressive amplitude modulator. Harris Intertype Corporation, August 5, 1975: US3898590 (6 worldwide citation)

An amplitude modulator, which has a combining circuit for combining a carrier wave with a power modulating signal to control the amplitude of an output wave of carrier frequency in accordance with the power modulating signal, is very efficient and has low distortion. The power modulating signal is p ...


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Swanson Hilmer I: Pulse duration modulation transmitter. Gates Radio Company, February 15, 1972: US3643161 (3 worldwide citation)

A radiofrequency transmitter having a pulse duration low-level modulator, a threshold amplifier, a power amplifier and a radiofrequency modulator. The power amplifier and the radiofrequency modulator are connected in series and means are provided to control the power level of the power amplifier and ...


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Swanson Hilmer I: Meter driver circuit having intiial overdrive and means to discharge a storage circuit at a constant rate. Harris Intertype Corporation, March 14, 1972: US3649911 (2 worldwide citation)

A meter driver circuit for improving the responsiveness of a meter to an electrical signal being measured. The signal being measured is applied through a first charging circuit which is in series with the meter to apply a temporary pulse to the meter. The pulse temporarily overdrives the meter to ov ...


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Swanson Hilmer I: Modulateur numerique damplitude, Digital amplitude modulator. Harris Corporation, GOWLING LAFLEUR HENDERSON, November 5, 1985: CA1196396 (1 worldwide citation)

- 54 - Abstract An amplitude modulator (10) is disclosed whichgenerates an amplitude modulated carrier signal byselectively combining varying numbers of other carriersignals. A circuit (20) is included which provides pluralcarrier signals of like frequency and phase where thenumber of carrier signal ...


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Swanson Hilmer I: Modulateur numerique, Digital modulator. Harris Corporation, FETHERSTONHAUGH & CO, September 3, 1985: CA1193017

Abstract An amplifier (Figs. 1-3) is disclosed for amplifyingan amplitude and frequency varying input signal. Theamplifier includes a circuit (24, 100) responsive to theinput signal to provide a digital representation thereof. In addition, a plurality of signal sources (30-36) areprovided which each ...


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Swanson Hilmer I: Amplificateur de puissance rf protege, Rf power amplifier system having amplifier protection. Harris Corporation, FETHERSTONHAUGH & CO, April 28, 1992: CA1299683

Abstract An RF power amplifier having improved amplifierprotection. An RF source provides an RF signal to beamplified. The amplifier includes a bridge circuit havingan input circuit adapted for connection across a DC voltagesource and an output circuit connected across a load. Thebridge circuit incl ...


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Swanson Hilmer I: Protection dun amplificateur de puissance rf, Rf power amplifier protection. Harris Corporation, FETHERSTONHAUGH & CO, October 1, 1991: CA1290027

Abstract An RF power amplifier is operated by supplying an RFsignal to the amplifier for amplification and therebyproviding an output RF signal to the amplifier's outputcircuit which has an impedance matching output networkconnected in series with a load. A detector serves todetect any reflected pow ...


9
Swanson Hilmer I: Bloc dalimentation pour signaux dattaque rf, Rf driver power supply. Harris Corporation, FETHERSTONHAUGH & CO, February 11, 1992: CA1295687

Abstract An RF power supply serves to supply a regulated power amplified RF drive signal to an RF transmitter. The supply includes an RF oscillator for providing an RF input signal. A DC voltage source provides a DC voltage V. A plurality of power amplifiers are provided with each receiving the inpu ...


10
Swanson Hilmer I: Reduction de la modulation de phase dans les amplificateurs numeriques, Reducing phase modulation of digital amplifiers. Harris Corporation, FETHERSTONHAUGH & CO, February 11, 1992: CA1295695

Abstract An RF amplitude modulated amplifier system is presented incorporating a plurality of RF amplifiers which are compensated for unwanted phase modulation. The system includes a common RF driver for supplying a common RF driver signal. A plurality of actuatable RF amplifiers are provided with e ...