A-to-d converter of the successive-approximation type

Details A-to-d converter of the successive-approximation type A-to-d converter of the successive-approximation type

H - Electricity

03

M

356/30, 354/90

H03M 1/00 (2006.01)

Patent

CA 1159956

ABSTRACT OF THE DISCLOSURE An integrated-circuit analog-to-digigal converter of the successive-approximation type formed on a single mono- lithic chip. The converter is made by a diffusion process wherein certain portions of the chip are formed with normal- mode linear transistors, and other portions are formed with inverted mode I2L transistors. The normal-mode transistors provide a switchable current-source DAC, a set of three-state output buffers, and a comparator The inverted mode tran- sistors provide an internal clock and successive-approrximatior control circuitry for the DAC. The chip also includes a voltage reference to provide for absolute analog-to-digital conversions.

300605

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