Patent ID: 6137340
Filing Date: 2000-10-24
Classification: H03K

Abstract:
A multiplexer circuit for selecting from a plurality of complementary input signal pairs a single complementary input signal pair for transmission of a single complementary output signal pair through a first multiplexer output node and a second multiplexer output node, the circuit comprising for each of the complementary input signal pairs:a. a differential amplifier including a first input and a second input, a first high-potential node and a second high-potential node, and a common low-potential node, wherein said first high-potential node is coupled to the first multiplexer output node and said second high-potential node is coupled to the second multiplexer output node;b. a first branch having a low-potential node coupled to said first high-potential node of said differential amplifier, said first branch including a first resistance element;c. a second branch having a low-potential node coupled to said second high-potential node of said differential amplifier, said second branch including a second resistance element, wherein said first branch and said second branch have a common high-potential node;d. a switch coupled between a high-potential power rail and said common high-potential node of said first branch and said second branch; ande. a common resistance element coupled between said high-potential power rail and said common high-potential node of said first branch and said second branch.