Programmable two-quadrant transconductance amplifier

Details Programmable two-quadrant transconductance amplifier Programmable two-quadrant transconductance amplifier

1980-01-21

1982-06-15

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330257, 330288, H03F 345, H03G 330

Patent

active

043353568

ABSTRACT:
Two multiplying digital-to-analog converters are used to digitally weight an analog current to produce a controllable output current. The output current is selected by a digital control signal applied to the control inputs of both converters. Two-quadrant operation is ensured by feeding the analog output of each converter to a current mirror amplifier which develops the required output current.

REFERENCES:
Edrington, "D-a Converter Forms Programmable Gain Control", Electronics, Jul. 24, 1975, p. 92.

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