Feedforward amplifiers

Details Feedforward amplifiers Feedforward amplifiers

1977-06-24

1978-12-19

Mullins, James B.

Amplifiers

With plural amplifier channels

Redundant amplifier circuits

330149, 330151, H03F 126, H03F 368

Patent

active

041308077

ABSTRACT:
In a feedforward amplifier the balance of the error cancelling loop can be controlled in amplitude and phase by a variable resistor and a variable capacitor connected to the input to the auxiliary amplifier. This can (a) be used for remotely controlled amplifiers to maximize the effect of phase scatter of third order intermodulation vectors, or (b) in a terminal to introduce deliberate distortion to cancel distortion introduced in line amplifiers.

REFERENCES:
patent: 3430156 (1969-02-01), Katzin
patent: 3541467 (1975-11-01), Seidel
patent: 3624534 (1971-11-01), Clayworth
patent: 3825843 (1974-07-01), Felsberg et al.
patent: 3886470 (1975-05-01), O'Neil et al.
Seidel et al., "Error-Controlled High Power Linear Amplifiers as UHF," The Bell System Technical Journal, May-Jun. 1968, pp. 691-701.

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