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Analog-to-digital converting arrangement

  • US 5,585,796 A
  • Filed: 09/19/1994
  • Issued: 12/17/1996
  • Est. Priority Date: 01/31/1992
  • Status: Expired due to Term
First Claim
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1. An arrangement for converting a high-frequency analog input signal into a series of digital signals on-line with high sampling rate, including:

  • a. several computing channels (1.1 to 1.k+n;

    SA-ADC) for providing a digital signal from an analog input;

    b. a multiplexing means (3) having several inputs, each input being connected to an individual computing channel output;

    c. a timing circuit (4) controlling cyclically in a clock signal rate and in a prescribed order one at the time of the computing channels to receive the current analog value of the analog input signal and also to control the multiplexing means (3) to place on its output one at the time of the digital outputs of the several computing channels;

    d. all the computing channels comprising means for computing the digital value of its received analog value during a digitizing phase simultaneously but skewed in relation to the other computing channels;

    whereine. each of said several computing channels (1.1 to 1.k+n;

    SA-ADC) includes a sample-and-hold means (5), to which the analog input signal and at least one successive approximating analog-to-digital converter (SA-ADC) is connected, and each computing channel is adapted to have an auto-zeroing phase for auto-zero its comparator means before the beginning of the digitizing phase; and

    wherein the number of computing channels corresponds to the number of clock signals needed for completing a period of an auto-zeroing phase and a digitizing phase in each one of the computing channels;

    f. a common reference voltage generator (2) is provided having a multiline output having a different reference voltage on each line of the multiline output; and

    g. all the computing channels having at least one multiline input connected in common to the multiline output of the voltage generator.

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