Abstract: A thin metal RFI (radio frequency interference) shield for an IR (infra-red) input circuit including an IR transducer for a remote control receiver has slot-like apertures with louver-like members formed by twisting the metal between the slot-like apertures substantially 90.degree. with respect to the surface of the housing. The louvers compensate for the absence of shielding material in the apertures and thereby improve the RFI shielding effectiveness of the shield. The louver-like members also have been found to expand the field of reception or field of the remote control receiver by reflecting IR radiation coming from sideward positions into the IR transducer.

Abstract: The control portion of a television receiver includes a flip flop which when supplied with operating power stores a binary signal having either an "on" level corresponding to the on condition of the receiver or an "off" level corresponding to the off condition of the receiver. In addition to a user responsive input arrangement for selectively controlling the level of the binary signal, a switching circuit is coupled to the flip flop to return the binary signal to its prior level after power line dropouts having less than a predetermined duration, and otherwise causing the binary signal to have its "off" level. The switching circuit is rendered operative at the end of power line dropouts to cause the binary signal to have its "on" level if an enabling signal selectively developed by a circuit including a capacitor and a diode connected between the flip flop and capacitor during the presence of operating power is still stored in the capacitor.