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

1982-03-25

1984-01-24

Sloyan, I. J.

Communications: electrical

Audible indication

Percussion-type sound producer

340347M, 377 54, H03K 1302

Patent

active

044279736

ABSTRACT:
An integrated-circuit analog-to-digital converter of the successive-approximation type formed on a single monolithic 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 I.sup.2 L transistors. The normal-mode transistors provide a switchable current-source DAC, a set of three-state output buffers, and a comparator. The inverted mode transistors provide an internal clock and successive-approximation control circuitry for the DAC. The chip also includes a voltage reference to provide for absolute analog-to-digital conversions.

REFERENCES:
patent: 4021685 (1977-05-01), Goodall et al.
Schmid, Electronic Analog/Digital Conversions, Van Nostrand Reinhold Co., 1970, pp. 240-247.
Millman et al., Pulse and Digital Circuits, McGraw-Hill Book Co., Inc., 1956, pp. 323-327.

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