Pulse width modulation amplifier

Details Pulse width modulation amplifier Pulse width modulation amplifier

1981-03-24

1983-11-15

Mullins, James B.

Amplifiers

Modulator-demodulator-type amplifier

330298, H03F 338

Patent

active

044158637

ABSTRACT:
A pulse width modulation amplifier having flat frequency characteristics including a comparator having an inverting input terminal coupled to an input signal source through a first resistor with the output of a ramp wave oscillator coupled to the non-inverting input terminal. The output of the comparator is coupled to a switching amplifier and a low-pass filter is coupled between the output of the switching amplifier and a load. A second resistor is coupled between the output of the switching amplifier and the inverting input terminal of the comparator and a capacitor is coupled between the inverting input terminal and ground. The switching amplifier has an output circuit including an excess current detection circuit.

REFERENCES:
"Amplificateur Audio 100 W Classe D a VMOS", EAI, Jun. 15, 1979, pp. 54, 55.

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