Patent ID: 6052471
Filing Date: 2000-04-18
Classification: H04B,H04R

Abstract:
Receiver control circuitry of a receiver that automatically detects, selects, and enables a priority input source signal of the receiver, comprising:a plurality of signal detect elements with each signal detect element of the one or more signal detect elements assigned to detect a respective source signal of a plurality of source signals generated by a source of a plurality of sources, wherein each signal detect element will pass its respective source signal after detecting the respective source signal for a minimum, uninterrupted period of time;a priority logic circuit coupled to the plurality of signal detect elements that receives one or more source signals passed by the plurality of signal detect elements, determines a priority source signal of the one or more source signals, and generates a code indicative of the priority source signal;a first selection element that receives the plurality of source signals and the code generated by the priority logic circuit, selects the priority source signal determined by the code, and outputs the priority source signal as an output signal;a plurality of source switches with each source switch of the plurality of source switches coupled to a source signal of the one or more source signals, wherein when a source switch of the plurality of source switches is activated the source signal coupled to the activated source switch is passed by the plurality of source switches;a second selection element that receives the priority source signal from the first selection element and the source signal from the plurality of source switches; anda disable element coupled to the second selection element,wherein the second selection element passes the priority source signal from the first selection element unless the disable element is activated in which case the second selection element passes the source signal from the plurality of source switches.