Multiplying digital-to-analog converter for high speed and...

Details Multiplying digital-to-analog converter for high speed and... Multiplying digital-to-analog converter for high speed and...

2008-12-19

2010-06-29

Mai, Lam T (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

C327S091000, C327S094000, C330S086000

Reexamination Certificate

active

07746260

ABSTRACT:
A multiplying digital-to-analog converter includes an operational amplifier (OP-amp) operated under a first power supply voltage and a second power supply voltage; an OP-amp input switch block coupled to a common mode voltage for selectively coupling the common mode voltage to input nodes of the OP-amp, wherein all switches included in the OP-amp input switch block are implemented utilizing PMOS transistors only, and the common mode voltage is substantially equal to the first power supply voltage; a capacitor block coupled to the OP-amp input switch block; a sampling switch block coupled to the input signal for selectively coupling the input signal to the capacitor block; a reference voltage switch block coupled to the capacitor block for selectively coupling the reference signal to the capacitor block; and a feedback switch block coupled between the capacitor block and output nodes of the OP-amp.

REFERENCES:
patent: 4631522 (1986-12-01), Cabot
patent: 5369406 (1994-11-01), Hughes
patent: 5835039 (1998-11-01), Giacomini
patent: 6653961 (2003-11-01), Gosser et al.
patent: 7268720 (2007-09-01), Murden et al.
patent: 7397287 (2008-07-01), Makihara
Bjornar Hernes, A 1.2V 220MS/s 10b Pipeline ADC Implemented in 0.13umDigital CMOS, Feb. 17, 2004.

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