Pulse width modulated signal amplifier

Details Pulse width modulated signal amplifier Pulse width modulated signal amplifier

1982-04-09

1984-07-03

Mullins, James B.

Amplifiers

Modulator-demodulator-type amplifier

330297, 330110, H03F 316

Patent

active

044582080

ABSTRACT:
A pulse width modulated signal amplifier includes a power source, an integrator supplied with an input signal to be pulse-width-modulated and a carrier signal from a carrier signal oscillator, a comparator connected to the output of the integrator for producing a pulse width modulated signal, an output amplifier supplied with a DC voltage from the power source, and a negative feedback circuit connected between the input of the integrator and the output of the output amplifier. The negative feedback circuit becomes effective after a predetermined time from the time when the power source becomes ON so as to avoid the oscillation of the closed loop including the integrator.

REFERENCES:
patent: 3889202 (1975-06-01), Suzuki

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