Conference paper
Mismatch-Shaped Pseudo-Passive Two-Capacitor DAC
A simple mismatch-shaping scheme is proposed for a two-capacitor DAC. Unlike in other mismatch-shaping systems, the shaped error is generated by direct filtering of a well-defined bounded signal, which can be generated as white noise. The operation is closely related to a specific digital interpolation filter, but arbitrary properties of the overall interpolation characteristic can be assured.Simulations indicate that the scheme can be used for the realization of DACs with 16-bit linearity and SNR performance, with only 0.1% capacitance accuracy.
The DAC is pseudo-passive, i.e. an active element is required only to buffer the output signal. Hence, it is potentially a very low-power circuit, suitable for portable applications.
Language: | English |
---|---|
Publisher: | IEEE Computer Society Press |
Year: | 1999 |
Pages: | 144-152 |
Proceedings: | IEEE Alessandro Volta Memorial Workshop on Low-Power Design |
ISBN: | 0769500196 and 9780769500195 |
Types: | Conference paper |
DOI: | 10.1109/LPD.1999.750415 |
CMOS technology Capacitors Circuits Clocks Energy consumption Interpolation Linearity Low pass filters Moon SNR performance Signal generators capacitance digital interpolation filter digital-analogue conversion direct filtering interpolation linearity low-power circuit low-power electronics mismatch-shaping scheme portable applications pseudo-passive two-capacitor DAC shaped error well-defined bounded signal white noise