BTL amplifier capable of providing stability of offset...

Details BTL amplifier capable of providing stability of offset... BTL amplifier capable of providing stability of offset...

2006-08-22

2006-08-22

Nguyen, Khanh Van (Department: 2817)

Amplifiers

With periodic switching input-output

C327S124000

Reexamination Certificate

active

07095275

ABSTRACT:
A BTL amplifier has a resistance element connected to an output reference voltage input terminal of an inverting amplifier. For offset compensation of the BTL amplifier, a variable current source controller controls an input switching circuit to cause application of compensation input voltages sent from an internal reference voltage source to a first input terminal and a second input terminal. The variable current source controller also controls a variable current source in response to an output signal from a comparator to minimize an output offset voltage, whereby a current flowing through the resistance element is adjusted to control the voltage at the output reference voltage input terminal.

REFERENCES:
patent: 4752744 (1988-06-01), Aoki
patent: 5061900 (1991-10-01), Vinn et al.
patent: 6710645 (2004-03-01), Isken et al.
patent: 6724248 (2004-04-01), Llewellyn
patent: 5-335850 (1993-12-01), None

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