Transmission gate series multiplexer

CAFC
  • US 5,162,666 A
  • Filed: 03/15/1991
  • Issued: 11/10/1992
  • Est. Priority Date: 03/15/1991
  • Status: Expired due to Term
First Claim
Patent Images

1. A multiplexer circuit for selecting one of a plurality of input variable signals, comprising:

  • two or more TGM circuits coupled in series;

    each TGM circuit including first and second transmission gates and having first and second input terminals, an output terminal and a control terminal;

    the output terminal of a first one of the TGM circuits coupled to one of the input terminals of a second, adjacent one of the TGM circuits so as to propagate a selected one of the input signals through the first TGM circuit to said one input terminal of the second TGM circuit as an input signal; and

    the other one of the second TGM input terminals coupled to receive one of the input signals, so that each successive TGM circuit in the series selects between the output of a next preceding TGM circuit and one of the input signals.

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