Multiple channel analog to digital converter

Details Multiple channel analog to digital converter Multiple channel analog to digital converter

1994-12-07

1997-06-10

Gaffin, Jeffrey A.

Coded data generation or conversion

Analog to or from digital conversion

Multiplex

341165, 341172, H03M 100

Patent

active

056380720

ABSTRACT:
A multiple channel analog to digital converter utilizing common conversion circuitry for converting multiple analog signals into corresponding digital signals. The converter includes an input stage having a plurality of capacitors, each one corresponding to one of the analog signals. The capacitors sample the respective analog signals and are successively coupled to common conversion circuitry, including a CDAC and a comparator. The CDAC iteratively increments or decrements the voltage of a selected one of the sampled analog signals for comparison to a reference voltage by the comparator. The comparator output is latched by a successive approximation register to provide a parallel output signal which is fed back to control the CDAC.

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