H - Electricity – 04 – M
Patent
H - Electricity
04
M
379/81
H04M 1/60 (2006.01) H04M 9/08 (2006.01)
Patent
CA 1181187
ABSTRACT: An anti-Larsen circuit for a telephone station in which the listening channel comprises an automatic listening level control circuit comprising, a variable attenuator circuit, a pluse width modulator and a threshold detector which supplies compression pulses, the transmission channel comprising a circuit for rendering the transmission channel operative or inoperative and also a control circuit, autua- tion of which takes place above a sound-level threshold S1 and a de-activation below a sound-level threshold S2 which is smaller than S1.
376006
Ferrieu Gilbert M.m.
Hamel Roger B.j.
Lefort Emmanuel
Moliere Francoise
Telecommunications Radioelectriques Et Telephoniques T.r.t.
Van Steinburg C.e.
LandOfFree
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