H - Electricity – 04 – B
Patent
H - Electricity
04
B
325/88
H04B 1/10 (2006.01) H03G 11/06 (2006.01) H04H 5/00 (2006.01)
Patent
CA 1178341
PHM. 40 443 14 ABSTRACT: A circuit is described for maintaining an input signal to a limiter used to limit amplitude excur- sions of a signal to be angle demodulated. Means are pro- vided for detecting a temporary loss in signal to said limiter resulting from the loss of signal due to large negative amplitude modulation or other factors. When the amplitude of the angle modulated wave falls below a pre- determined minimum, a substitute intermediate frequency signal is generated to maintain the limiter in a limiting condition during the temporary loss in broadcast signal. The substitute intermediate frequency signal has a fre- quency substantially equivalent to the intermediate fre- quency signal developed from the broadcast signal during periods when the amplitude of the broadcast signal is adequate. The substitute signal prevents the occurrence of noise generated from an angle demodulator due to a temporary loss in signal.
379545
Magnavox Consumer Electronics Company
Van Steinburg C.e.
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