Offset balancing method and apparatus for a DC amplifier

Details Offset balancing method and apparatus for a DC amplifier Offset balancing method and apparatus for a DC amplifier

1983-02-07

1985-01-22

Mullins, James B.

Amplifiers

With periodic switching input-output

330 51, H03F 126

Patent

active

044954700

ABSTRACT:
Offset balancing method and apparatus for a DC amplifier including gain selection and polarity switching circuits are disclosed. During the offset compensation process, the amplifier input is connected to ground and its polarity is switched between the normal and inverted states before detecting the resulting output DC levels. The difference between such output DC levels is used to generate an offset compensation signal to be applied to the amplifier. The offset compensation process is repeated for each gain selection of the DC amplifier.

REFERENCES:
patent: 4209753 (1980-06-01), Riley
patent: 4297642 (1981-10-01), Baldwin et al.
patent: 4310243 (1982-01-01), Brown et al.

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