Amplifiers – Modulator-demodulator-type amplifier
Patent
1986-01-03
1987-06-16
Mullins, James B.
Amplifiers
Modulator-demodulator-type amplifier
330207A, H03F 338
Patent
active
046738878
ABSTRACT:
A digital power amplifier system features an analog signal which is converted to a corresponding digital signal and is, in turn, applied as input signals in a digital binary format to a digital pulse width modulator. The digital pulse width modulated signals are amplified in a digital or switching power amplifier. The resulting signals are then passed through a tuning or filter circuit to produce an analog signal having a desired frequency and wave shape characteristics. The analog signal is then applied to a suitable load device. In the thus provided amplification system, all of the signal processing and amplification is accomplished through digital or power switching circuitry with no analog influence until the amplified signals are applied to the tuning or filter elements.
REFERENCES:
patent: 4166247 (1979-08-01), Miyazawa
patent: 4390849 (1983-06-01), Miskin
Honeywell Inc.
Jensen Roger W.
Mullins James B.
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