Linearity control circuit for digital to analog converter

Details Linearity control circuit for digital to analog converter Linearity control circuit for digital to analog converter

1987-02-26

1987-12-29

Shoop, Jr., William M.

Communications: electrical

Audible indication

Percussion-type sound producer

307571, 307572, H03M 166

Patent

active

047163984

ABSTRACT:
In a circuit utilizing a digital to analog converter, an amplifier receives two voltage levels of a digitally modulated input signal via two different switching circuits. Linearity of output signals provided by the amplifier is significantly improved by a circuit for effectively matching the resistances provided by the two switching circuits to the amplifier. A feedback circuit from the output of the amplifier, including a feedback amplifier, is used to withdraw from a switching device any current passing therethrough when ON, thus eliminating any effect of resistance of the switching device from the amplifier.

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