Regulator arrangement useful in an infrared remote control...

Details Regulator arrangement useful in an infrared remote control... Regulator arrangement useful in an infrared remote control...

H - Electricity

04

B

325/1, 328/114.3

H04B 10/04 (2006.01) G08C 23/04 (2006.01)

Patent

CA 1137171

-12- RCA 74,141 ABSTRACT OF THE DISCLOSURE In an infrared (IR) remote control transmitter, a main amplitude regulator is provided to regulate the amplitude of pulses applied to the transmitter's driver so as to maintain infrared radiation at a level consistent with proper operation but well below a safe limit for IR radiation under normal operating conditions. An auxiliary amplitude regulator is also provided to regulate the amplitude of pulses applied to the driver so as to maintain infrared radiation below the safe limit if the amplitude exceeds a predetermined threshold level due to a component failure of the main amplitude regulator. An average detector is also coupled to the auxiliary amplitude regulator so that the amplitude of the pulses applied to the driver is reduced should their width exceed beyond a desired value due to a component failure or misoperation of the transmitter.

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