Charge domain successive approximation analog-to-digital...

Details Charge domain successive approximation analog-to-digital... Charge domain successive approximation analog-to-digital...

2011-06-14

2011-06-14

Nguyen, Khai M (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

C341S155000

Reexamination Certificate

active

07961131

ABSTRACT:
An analog to digital conversion circuit and method is presented. The analog to digital circuit (100) comprises a first capacitor (103), arranged for being switchably (102) connected on one side to an input voltage (101), at least one successive approximation circuit (104), a comparator (108) arranged for outputting a sign indicative of the difference between the voltage on the first capacitor (103) and a comparison voltage (109), and a control block (110), arranged for converting said comparator's output into steering signals and in a digital output signal. The successive approximation circuit comprises a second capacitive structure (106), switchably connected to a pre-charge circuit (107) arranged for pre-charging the second capacitive structure (106), whereby the second capacitive structure (106) is connected in parallel with the first capacitor (103) via a charge copying circuit (105). The steering signals comprise of a signal for steering (112) said charge copying circuit (105) and for steering (113) the pre-charge circuit (107).

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European Search Report, European Application No. EP 07 10 0741, dated Apr. 2, 2007.

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