Cyclic analog-to-digital converter

Details Cyclic analog-to-digital converter Cyclic analog-to-digital converter

2007-09-20

2009-02-03

Young, Brian (Department: 2819)

Coded data generation or conversion

Analog to or from digital conversion

Analog to digital conversion

C341S155000

Reexamination Certificate

active

07486218

ABSTRACT:
An A/D converter includes an A/D conversion circuit, a multiplying D/A converter, a switch circuit, and a control circuit. The control circuit prevents an A/D output of the A/D conversion circuit from being input to the D/A converter and controls the switch circuit so that an input voltage to be A/D-converted is recycled through the switch circuit and the multiplying D/A converter. As a result, the input voltage is amplified to a suitable level for A/D conversion. Then, the control circuit allows the A/D output to be inputted to the D/A converter and controls the switch circuit so that the amplified voltage is recycled through the switch circuit, the multiplying D/A converter, and the A/D conversion circuit. As a result, the amplified voltage is A/D-converted.

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T. Matsuura, et al., “A 10-bit 3-Msample/s CMOS Multipath Multibit Cyclic ADC,” IEICE Trans. Electron., vol. E83-C, No. 2 (Feb. 2000).

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