Electronic echo apparatus

Details Electronic echo apparatus Electronic echo apparatus

1977-06-27

1978-11-21

Mullins, James B.

Amplifiers

Signal feedback

Nonlinear impedance element in loop path

84 124, 84DIG10, 84DIG26, H03F 136

Patent

active

041268296

ABSTRACT:
An electronic echo apparatus comprising an input amplifier, an output amplifier connected thereto through a transmission channel, a delay device connected in parallel to said channel, and a feedback path connected in parallel to said delay device, characterized in that said feedback path includes a control means, and in that there is connected to the output of the output amplifier a means for measuring the output signal of said output amplifier, comparing said output signal to a predetermined threshold value and, when said output signal reaches said threshold value, supplying a control signal to said control means for terminating the feedback.

REFERENCES:
patent: 3277381 (1966-10-01), Sullivan
patent: 4005268 (1977-01-01), Canell et al.

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