Patent ID: 7046041
Filing Date: 2006-05-16
Classification: H03K

Abstract:
1. A multiplexer circuit, comprising: a plurality of circuit input terminals; a circuit output terminal; a first multiplexer having a plurality of input terminals coupled to the circuit input terminals, at least one select terminal, and an output terminal; a second multiplexer having a plurality of input terminals, at least one select terminal coupled to the at least one select terminal of the first multiplexer, and an output terminal; a plurality of pulldowns, each pulldown being coupled between a ground terminal and a corresponding one of the input terminals of the second multiplexer, each pulldown having a gate terminal coupled to a corresponding one of the circuit input terminals; and an output circuit having a first input terminal coupled to the output terminal of the first multiplexer, a second input terminal coupled to the output terminal of the second multiplexer, and an output terminal coupled to the circuit output terminal, wherein the first and second multiplexers are configured to select a corresponding one of their respective input terminals in response to equivalent signals received at their respective select terminals.