D/A converter and delta-sigma D/A converter

Details D/A converter and delta-sigma D/A converter D/A converter and delta-sigma D/A converter

1997-12-09

1999-11-23

Young, Brian

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

341143, H03M 300

Patent

active

059908190

ABSTRACT:
A D/A converter for converting a given digital signal into an analog signal includes a plurality of capacitors (C1, C2 . . . , Ci) for storing an electric charge corresponding to a predetermined reference voltage (Vr+or Vr-). The reference voltage is selected depending on the digital signal during a period when a clock .phi.1 is at a high level. A switch selection (SUG1-SUGi, SB) is used to connect each of the plurality of capacitors between an input terminal and an output terminal of an operational amplifier 100 during a period when a clock +2 is at a high level.

REFERENCES:
patent: 4384277 (1983-05-01), Allgood
patent: 4616212 (1986-10-01), Law
patent: 5008674 (1991-04-01), Da Franca
patent: 5162801 (1992-11-01), Powell
R. va de Plassche, "Interated Analog-to-Digital and Digital-to-Analog Converters," Kluwer Academic Publishers, 1994, pp. 229-230.
R. Gregorian et.al., "Switched Capacitor Circuit Design," Proc. IEEE, vol. 71, pp. 941-966, Aug. 1983.
R. T. Baird et.al., "Linearity Enhancement of Multibit IEEE Transactions on Circuits and Systems-II", vol. 42, No. 12, Dec. 1995.

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