Multi-channel D/A converter utilizing a coarse D/A converter and

Details Multi-channel D/A converter utilizing a coarse D/A converter and Multi-channel D/A converter utilizing a coarse D/A converter and

1996-12-02

1998-09-01

Young, Brian K.

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

341144, 341136, H03M 136

Patent

active

058016554

ABSTRACT:
A digital to analog (D/A) converter which has good monotonicity and is small in scale of circuitry, wherein a coarse D/A converter is separated from the fine D/A converter, and the output from the coarse D/A converter is added to the output from the fine D/A converter, and wherein the coarse D/A converter converts an upper bit digital input signal to an analog output signal, and the fine D/A converter converts a lower bit digital input signal to an analog output signal, wherein differential pairs are provided having different weighted transconductances based on the lower bit digital input signal, and are controlled to add at the same time the converted analog output signal from the fine D/A converter to the converted analog output signal from the coarse D/A converter, whereby resolution is substantially improved.

REFERENCES:
patent: 5396245 (1995-03-01), Rempfer
patent: 5489904 (1996-02-01), Hadidi

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