Analog-to-digital converter employing constant-current circuit i

Details Analog-to-digital converter employing constant-current circuit i Analog-to-digital converter employing constant-current circuit i

1978-07-18

1981-02-10

Sloyan, Thomas J.

Communications: electrical

Audible indication

Percussion-type sound producer

340347AD, 307246, 307304, H03K 1302

Patent

active

042504937

ABSTRACT:
The constant-current circuit consists of two MISFETs connected in series and a gate bias circuit for these MISFETs. The drain voltage of the first MISFET is maintained substantially constant by the source voltage of the second MISFET. The first MISFET does not sustain the channel length modulation, because its drain voltage is substantially constant. Consequently, a constant output current is obtained through the drain of the second MISFET.

REFERENCES:
patent: 3678502 (1972-07-01), Kienzler
patent: 4020367 (1977-04-01), Yamashiro et al.
patent: 4100437 (1978-07-01), Hoff
patent: 4117353 (1978-09-01), Butler et al.
patent: 4165478 (1979-08-01), Butler et al.
Beck, Direct Digital-To-Analog Values Storage, IBM Technical Disclosure Bulletin, vol. 9, No. 4, 09001966, p. 380. _
Cope et al., Engine-Temperature Monitor Warns Pilot of Danger, 06241966, Electronics, p. 114. _

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