Digital/analog conversion circuit

Details Digital/analog conversion circuit Digital/analog conversion circuit

2007-02-22

2008-09-09

Barnie, Rexford (Department: 2819)

Coded data generation or conversion

Digital code to digital code converters

C341S144000

Reexamination Certificate

active

07423558

ABSTRACT:
A digital/analog conversion circuit includes a plurality of capacitors, a voltage application section, a connection section, and a control section. The control section is operable to perform the charge sharing operation and to collect the charge supplied from the voltage application section. The control section sets, for at least M higher order ones of the digits of the binary code, the number of times by which the one capacitor takes part in the charge sharing operation within a series of operations before the charge supplied from the voltage application section by the voltage application operation is shared by the last charge sharing operation to twice the number of times by which the one capacitor takes part in the voltage application operation or the charge retaining operation, M being an integer equal to or greater than two.

REFERENCES:
patent: 6917321 (2005-07-01), Haurie et al.
Fumio Ueno et al., Reduction Methods of Capacitor Mismatch Errors In Switched-Capacitor A/D, D/A Converters: ISCAS'88, Faculty of Engineering, Kumamoto University, pp. 2813-2816, Japan, 1988.
L. Weyten et al., “Two-capacitor DAC with compensative switching”, Electronics Letter, 1995, vol. 31, pp. 1435-1437.

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