Input level shifting circuit for low voltage digital-to-analog c

Details Input level shifting circuit for low voltage digital-to-analog c Input level shifting circuit for low voltage digital-to-analog c

1985-05-08

1986-08-19

Shoop, Jr., William M.

Communications: electrical

Audible indication

Percussion-type sound producer

340347CC, 340347M, H03M 100

Patent

active

046072497

ABSTRACT:
A low voltage sixteen bit digital-to-analog converter operable between +5 and -5 volt power supplies and capable of providing output voltage levels to within about 1.4 volts of +V.sub.CC and -V.sub.CC includes an input level shifting circuit that provides precise switching of a bit current switch circuit by producing a precise voltage drop across a level shifting resistor by drawing a current that is adjusted to compensate for variations in resistance of the level shifting resistors due to process parameter variations and temperature variations.

REFERENCES:
patent: 4423409 (1983-12-01), Naylor et al.
patent: 4543561 (1985-09-01), Holloway
patent: 4556870 (1985-12-01), Brokaw et al.

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