Amplitude modulator circuit having multiple power supplies

Details Amplitude modulator circuit having multiple power supplies Amplitude modulator circuit having multiple power supplies

1992-11-23

1993-08-24

Grimm, Siegfried H.

Modulators

Amplitude modulator

Plural modulation

330285, 332178, 455108, 455127, H03C 140

Patent

active

052392759

ABSTRACT:
An amplitude modulator circuit, having an input for receiving an input information signal and an output for providing an output signal, which is proportional to the input signal. The amplitude modulator circuit comprises at least two pass devices for amplifying the input information signal to produce the output signal and applying it to a load. The amplitude modulator circuit further comprises at least two voltage supplies for applying a plurality of supply voltages (at least some of which have different voltages) to the pass devices. The amplitude modulator circuit also includes a driver circuit having an input for receiving the input signal, and at least two driver outputs for driving the pass devices. The driver circuit activates the pass device having the lowest supply voltage that is sufficient to supply the required voltage to the load.

REFERENCES:
patent: 3413570 (1968-11-01), Bruene et al.
patent: 3486128 (1969-12-01), Lohrmann
patent: 4205241 (1980-05-01), Fisher et al.
patent: 4403197 (1983-09-01), Swanson
patent: 4442407 (1984-04-01), Apel
patent: 4449103 (1984-05-01), Kyrian
patent: 4580111 (1986-04-01), Swanson
patent: 4611162 (1986-09-01), Erratico et al.
patent: 4709404 (1987-11-01), Tamura et al.
patent: 4731869 (1988-03-01), Farrer

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