Charge-domain pipelined analog-to-digital converter

Details Charge-domain pipelined analog-to-digital converter Charge-domain pipelined analog-to-digital converter

2008-01-18

2009-08-04

Williams, Howard (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

C341S161000, C377S057000, C257S215000

Reexamination Certificate

active

07570192

ABSTRACT:
An ADC implementation of a bucket brigade type charge transfer pipeline using Metal Oxide Semiconductor (MOS) Bucket Brigade Devices (BBDs) that can be used in Analog-to-Digital (A/D) converters and other applications. In one embodiment a control circuit provides independent control of charge storage and charge transfer timing. Other arrangements provide high-speed and high-accuracy (A/D) conversion by employing a “boosted” charge-transfer circuit. The implementation can also achieve lower power consumption and improved resolution compared to other charge-domain methods by the use of a tapered pipeline, in which the amount of charge being processed is reduced in later pipeline stages compared to earlier ones. Still other embodiments enable implementing more than one decision threshold per stage, to support multi-bit resolution per stage and RSD-type A/D conversion algorithms.

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