Patent
1975-05-21
1977-03-08
Murray, Richard
325186, H03G 318
Patent
active
040115127
ABSTRACT:
A harmonic filter failure detection apparatus for use in a single sideband radio transmitter is disclosed. A first directional coupler measures the power delivered to the harmonic filter and a second directional coupler measures the power passed through the harmonic filter. The power measurements of the first and second directional couplers are then compared in a latch type comparator circuit and a control signal output is developed which indicates whether or not the harmonic filter is operating properly. The control signal output is used to shut down the single sideband transmitter when a filter failure has been detected.
REFERENCES:
patent: 2213099 (1940-08-01), Adorjan
patent: 2298930 (1942-10-01), Decino
patent: 3486128 (1969-12-01), Lohrmann
patent: 3641451 (1972-02-01), Hollingsworth et al.
patent: 3852669 (1974-12-01), Bowman et al.
Gillman James W.
Melamed Phillip
Motorola Inc.
Murray Richard
Myer Victor
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