Amplification circuit

Details Amplification circuit Amplification circuit

1992-06-17

1994-09-13

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including particular power supply circuitry

330 10, 330263, H03F 326, H03F 338

Patent

active

053472306

ABSTRACT:
An amplification circuit for power amplification of an audio signal or other signal includes a main power source line for supplying a driving power to a load, a switching element inserted in the main power source line for turning on and off the main power line, a smoothing circuit inserted in the main power line for smoothing an output of the switching element, a switching control circuit for switching the switching element with a variable on-off ratio in accordance with the level of an input signal, an auxiliary power source line capable of responding to changes in the level of the input signal at a higher speed than the main power line to supply power to the load, an auxiliary power supply amount adjusting element inserted in the auxiliary power line to adjust the power supply amount from the auxiliary power source line to the load, and an auxiliary power supply amount control circuit for controlling the auxiliary power supply adjusting element to cause power corresponding to any deficiency of power supplied by the main power source line to be supplied from the auxiliary power source line. The amplification circuit is driven by a power voltage capable of supplying substantially a maximum output from the auxiliary power source line to the load regardless of any deficiency of the power supply amount to the load by the main power source line.

REFERENCES:
patent: 4115742 (1978-09-01), Yokoyama
patent: 4378530 (1983-03-01), Garde
patent: 4430625 (1984-02-01), Yokoyama
patent: 4472687 (1984-09-01), Kashiwagi et al.
patent: 4498057 (1985-02-01), Noro
patent: 4507619 (1985-03-01), Dijkstra et al.
patent: 4516080 (1985-05-01), Garde
patent: 4523152 (1985-06-01), Garde

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