Feed forward circuit

Details Feed forward circuit Feed forward circuit

1981-12-28

1984-05-22

Nussbaum, Marvin L.

Wave transmission lines and networks

Coupling networks

Nonreciprocal gyromagnetic type

333 17R, 333174, 330124R, H03H 1104, H03H 1102

Patent

active

044504179

ABSTRACT:
A feed forward circuit that can be used as an isolator or filter includes a first and a second directional coupler that, depending on the application, either splits an applied signal into two paths or combines the two paths to obtain an output signal. One path includes an electronically tunable band reject filter (or notch filter) which may be bypassed by a switch in the isolator application, and an inverting amplifier. The second path includes a delay line that compensates for the time delay of the signal in the first path due to the time delay of the inverting amplifier and electronically tunable band reject filter.

REFERENCES:
patent: 3030501 (1962-04-01), Rapuano
patent: 3234555 (1966-02-01), Petrilla et al.
patent: 3649927 (1972-03-01), Seidel
patent: 3715690 (1973-02-01), Young et al.
Prochazka et al.-"Design of a Wideband Feed Forward Distribution Amplifier," IEEE Transactions on Consumer Electronics, Nov. 1976, pp. 349-356.

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