Patent ID: 6211721
Filing Date: 2001-04-03
Classification: H03K

Abstract:
A multiplexer, comprising:a plurality of pairs of emitter coupled input transistors, each pair of emitter coupled input transistors comprising a first input transistor and a second input transistor;a plurality of selection transistors, the collector of each selection transistor being connected to the emitters of a corresponding pair of input transistors;a main current source, the emitters of the selection transistors being connected to the main current source;a first cascode transistor, the emitter of the first cascode transistor being connected to the collector of each of the first input transistors;a second cascode transistor, the emitter of the second cascode transistor being connected to the collector of each of the second input transistors; anda first bleed current source connected to the emitter of the first cascode transistor.