Digital-to-analog converter with controlled buffered inputs

Coded data generation or conversion – Analog to or from digital conversion – Digital to analog conversion

Reexamination Certificate

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C341S144000

Reexamination Certificate

active

07425912

ABSTRACT:
A DAC circuit is provided which implements a buffered DAC input where the buffer is provided by a differential amplifier whose supply rail is correlated with the input to the DAC. In this way it is possible to buffer the circuitry using amplifiers whose open loop gain specifications may be relaxed without affecting the linearity performance of the DAC.

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PCT/EP2007/056253, International Search Report, Oct. 11, 2007.
Karthikeyan, S. et al, “Low-Voltage Analog Circuit Design Based On Biased Inverting Opamp Configuration”; IEEE, vol. 47, Mar. 3, 2000, pp. 176-184.

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