Analog signal amplifier and audio signal amplifier

Details Analog signal amplifier and audio signal amplifier Analog signal amplifier and audio signal amplifier

1996-08-23

1998-08-04

Mottola, Steven

Amplifiers

Modulator-demodulator-type amplifier

330207A, H03F 338

Patent

active

057899754

ABSTRACT:
An input limiting circuit limits the maximum signal voltage value of input signal voltage supplied from a signal source through an input terminal. A power amplifying circuit converts the signal voltage from the input limiting circuit to a switching signal having the input signal included in a low frequency component using, for example, a PWM modulation, and then amplifies the output power of the modulated signal using a D-class amplification. A signal demodulating circuit selects the switching frequency signal received from the power amplifying circuit, and demodulates it into a signal similar to the signal generated by the original source. The demodulated signal from the signal demodulating circuit is then supplied to a reproducing device.

REFERENCES:
patent: 4524335 (1985-06-01), Yokoyama
patent: 5160896 (1992-11-01), McCorkle
patent: 5343161 (1994-08-01), Tokumo et al.

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