Voltage controlled diode attenuator

Details Voltage controlled diode attenuator Voltage controlled diode attenuator

1985-01-22

1986-05-20

Wong, Peter S.

Electricity: power supply or regulation systems

In shunt with source or load

Using diode

323354, 307297, 307561, 307565, 330284, G05F 1613

Patent

active

045904170

ABSTRACT:
A voltage controlled diode attenuator has no coils and, therefore, may be built in integrated circuit form. At least one pair of similarly poled diodes and a resistor are connected in a series circuit. An input signal and variable control voltage are applied to a junction between first and adjoining sides of the pair of diodes. An output voltage appears at an opposite side of one of the diodes. A differential amplifier applies a fixed bias voltage to the output terminal, and a negative feedback is connected between the opposite side of the one diode and an input to the differential amplifier.

REFERENCES:
patent: 3568073 (1971-03-01), McGuffin
patent: 4354159 (1982-10-01), Schorr et al.
Electronic Design 7, Mar. 29, 1977, pp. 100-102, "Need a Pin-Diode Attenuator?" by Roger S. Viles.

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