Digital/analog converter with high output voltage stability

Details Digital/analog converter with high output voltage stability Digital/analog converter with high output voltage stability

1988-11-17

1990-10-16

Shoop, Jr., William M.

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

323311, H03M 180

Patent

active

049638734

ABSTRACT:
A digital/analog converter designed for very high frequencies is described. It has a first stage, which is a standard stage, in which several parallel-mounted controllable loads deliver currents in geometrical progression in a current/voltage converting transistor. Each controllable load has an input transistor, to the gate of which a bit is addressed as well as a diode and a saturable resistor. The second stage is a shifter formed by a transistor mounted as a follower source, in series with at least one diode and one pull-back transistor, the source of which is at a negative potential. The voltage at the drain of the converting transistor is applied to the gate of the shifter transistor, and the output voltage at the drain of the pull-back transistor is looped to the gate of the converting transistor.

REFERENCES:
patent: 3815121 (1974-06-01), Wilensky

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