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Multiplexed multi-channel bit serial analog-to-digital converter

  • US 6,310,571 B1
  • Filed: 03/30/2001
  • Issued: 10/30/2001
  • Est. Priority Date: 03/30/2001
  • Status: Expired due to Term
First Claim
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1. A circuit comprising:

  • an analog-to-digital (A/D) converter comprising;

    a first signal generator for generating a first signal having a plurality of levels;

    a comparator having a first input terminal connected to receive said first signal, said comparator having a second input terminal connected to receive a plurality of analog input signals, each analog input signal to be converted into a digital value, and a third input terminal for receiving a plurality of input select signals, said comparator including a multiplexer coupling said plurality of analog input signals to a plurality of corresponding input signal paths, said multiplexer selecting one of said plurality of input signal paths based on said plurality of input select signals;

    a binary signal generator for generating a series of binary signals; and

    a latch having a first input terminal coupled to receive an output signal of said comparator, said latch having a data input terminal coupled to receive said series of binary signals, an output signal of said comparator controlling when said latch provides an output signal corresponding to a binary signal applied to said data input terminal;

    wherein said latch provides at least a portion of an N-bit digital code representing at least one of said analog input signals applied to said second input terminal of said comparator.

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