Pipelined AD converter

Details Pipelined AD converter Pipelined AD converter

2011-03-22

2011-03-22

Nguyen, Khai M (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

C341S122000, C341S162000

Reexamination Certificate

active

07911369

ABSTRACT:
A pipelined AD converter (1) includes a plurality of conversion stages (11, 11, . . . ). In each of the conversion stages, an analog-to-digital conversion circuit (101) converts an input voltage (Vin) from the preceding stage to a digital code (Dout). A digital-to-analog conversion circuit (102) converts the digital code obtained by the analog-to-digital conversion circuit to an intermediate voltage (Vda). A charge operation circuit (103) has: a capacitor section (C1, C2) for sampling the input voltage; and an amplifier section (104) for amplifying a mixed voltage of the input voltage sampled by the capacitor section and the intermediate voltage obtained by the digital-to-analog conversion circuit. The amplifier section (104) includes a plurality of op-amps (amp1, amp1, . . . ) having the same configuration and connected in parallel with each other.

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