Signal limiting circuit

Details Signal limiting circuit Signal limiting circuit

1978-08-14

1979-09-25

Claffy, Kathleen H.

179 84VF, 328169, H04B 322

Patent

active

041692152

ABSTRACT:
The disclosed signal limiting circuit is bridged on to a bidirectional communication path (T, R) and functions to selectively attenuate excessive signals (2V.sub.A) being transmitted in a predetermined direction on the bidirectional communication path. This is accomplished by a signal discriminator circuit (100) which separates the excessive signal (2V.sub.A) from the plurality of signals appearing on the communication path (T, R). The signal discriminator circuit (100) also inverts the isolated excessive signal, passes it through an attenuator (102) to a signal injection circuit (103) which injects a controlled amount of the 180 degrees out-of-phase isolated excessive signal back on the communication path (T, R) to cancel out a portion of the excessive signal, thereby providing selective attenuation of the excessive signal.

REFERENCES:
patent: 2920281 (1960-01-01), Appert et al.
patent: 3374435 (1968-03-01), Engel
patent: 3602800 (1971-08-01), Feldman et al.
patent: 3611145 (1971-10-01), O'Connor
patent: 4117414 (1978-09-01), Lillig et al.
P. R. Arthur, "Dynamic Noise Limiter," Radio and Electronics Constructor, vol. 30, No. 1, Aug. 1976, pp. 41-47 (179-1P).
"Dynamic Noise Limiter," Elektor, vol. 2, No. 3, Mar. 1976, pp. 341-346.

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