Reference voltage driving circuit and pipelined analog to...

Details Reference voltage driving circuit and pipelined analog to... Reference voltage driving circuit and pipelined analog to...

2007-07-24

2007-07-24

Mai, Lam T. (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

C341S158000

Reexamination Certificate

active

11357756

ABSTRACT:
A reference voltage driving circuit and a pipelined analog to digital converter including the reference voltage driving circuit capable of providing a stable reference voltage even during a high speed/high resolution of analog-to-digital conversion using source follower circuits. Furthermore, a MDAC (Multiplying Digital to Analog Converter) requiring a high precision and a flash ADC (Analog to Digital Converter) requiring a relatively low precision are driven by respectively separate reference voltage driving circuits to thereby enable to curb an introduction of noise from the flash ADC into the MDAC requiring a high precision. Accordingly, there is no need of using a large capacity of capacitor for stabilizing the reference voltage, thereby enabling an embodiment with a smaller area and reducing the power consumption.

REFERENCES:
patent: 4216393 (1980-08-01), Gillberg et al.
patent: 4709168 (1987-11-01), Kamuro et al.
patent: 6873143 (2005-03-01), Moon et al.

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