Switching circuit device using current mirror circuits

Details Switching circuit device using current mirror circuits Switching circuit device using current mirror circuits

1987-07-01

1988-08-30

Salce, Patrick R.

Electricity: power supply or regulation systems

Self-regulating

Using a three or more terminal semiconductive device as the...

323315, 323351, G05F 326

Patent

active

047679794

ABSTRACT:
In a switching circuit device using current mirror circuits, there are provided a first group of current mirror circuits wherein a plurality of signal currents supplied via input terminals are superimposed upon mirror currents and signal currents resulting from the superimposition are derived as new mirror currents; and a second group of current mirror circuits to which the new mirror currents are supplied. The output stages of the second group of current mirror circuits are connected to each other at a common point which in turn is tied to the output stage of a current mirror circuit for supplying a mirror current of a predetermined magnitude. An output terminal is led out of said common point. Bias voltage for said second group of current mirror circuits is controlled so that any desired signal current is selected from said plurality of signal currents.

REFERENCES:
patent: 4408190 (1983-10-01), Nagano
patent: 4608530 (1986-08-01), Bacrania

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