Phase shifting circuit

Details Phase shifting circuit Phase shifting circuit

1977-04-18

1978-05-02

Goldberg, Gerald

Electricity: power supply or regulation systems

Remote sensing

307232, 307262, 323122, 328155, 330107, H03F 134

Patent

active

040877370

ABSTRACT:
A phase shifting circuit of the type comprising an operational amplifier with a capacitor in its negative feedback path and a resistor in series with its inverting input port is modified to provide adjustable phase shift. Adjustability is achieved by connecting a second capacitor in shunt with the resistor and, furthermore, a series-connected third capacitor and signal-inverting, controllable-gain amplifier also in shunt with the resistor.

REFERENCES:
patent: 3378785 (1968-04-01), Nordahl
patent: 3465276 (1969-09-01), Silva et al.
patent: 3566284 (1971-02-01), Thelen
patent: 3943455 (1976-03-01), Bladen
patent: 4015224 (1977-03-01), Benzinger
Handbook of Op. Amp. Applications, 1963, Burr-Brown, Research Corp. pp. 16 & 52, relied upon.

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