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High Speed 8-bit A/D Converter for Video Signal Processing

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4 Author(s)
Hisayasu Yoshizawa ; R & D Center, TOSHIBA CORPORATION ; Ken-ichi Torii ; Yasuhiro Sugimoto ; Takao Itoh

An 8-bit fully parallel-type A/D converter for video use has been developed. For the consumer video signal processing use, both low cost and high reliability are required. To achieve these requirements, small chip size and plastic packaging must be realized. This IC realized the smallest chip size as a bipolar A/D converter of fully parallel conversion scheme by simplifying the logic circuit and using high density A-NSA (advanced Nitride Self Aligned) process. For plastic packaging, Aluminum (Al) resistor, which has been used in bipolar parallel A/D converters can not be used due to low reliability by corrosion. Newly developed MoSi2 resistor chain achieved high reliability enough to adopt plastic packaging. The IC has only 6,500 elements and dissipates 850 mW at single -5.2V supply voltages. Sampling frequency is up to 100 MHz, and over 10 MHz input signal bandwidth and 8-bit resolution have also been achieved.

Published in:

Solid-State Circuits Conference, 1985. ESSCIRC '85. 11th European

Date of Conference:

16-18 Sept. 1985