Electronic echo device

Details Electronic echo device Electronic echo device

1976-09-20

1978-07-04

Dahl, Lawrence J.

Amplifiers

Signal feedback

Frequency responsive feedback means

84 124, 330107, H03F 136

Patent

active

040991350

ABSTRACT:
An electronic echo device comprising an input amplifier, an output amplifier connected therewith across a transfer channel, a delay device connected in parallel to said channel, and a feedback path connected in parallel to said delay device. According to this invention a control device is included between the input of the echo device and the delay device, to which control device the feedback path is also connected. The arrangement is such that the gain factor of the control device, upon a relatively sudden change in the signal level supplied to it, varies to counter-act said change.

REFERENCES:
patent: 3838202 (1974-09-01), Nakada

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