System and method for analog-to-digital converter with reduced average input current and reduced average reference current

System and method for analog-to-digital converter with reduced average input current and reduced average reference current

  • CN 101,044,682 B
  • Filed: 10/17/2005
  • Issued: 03/25/2015
  • Est. Priority Date: 10/18/2004
  • Status: Active Grant
First Claim
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1. , to the method that differential analog input signal is sampled, described method comprises:

  • Perform N number of sampling operation in succession to differential analog input signal, described N number of sampling operation in succession comprises;

    With sampling apparatus, N is performed to differential analog input signal and the first reference signal 0individual sampling operation, N 0a subset of N number of sampling order, wherein at N 0the first stage of individual sampling operation, to a sampling in differential analog input signal and the first reference signal, at N 0the second stage of individual sampling operation, to another sampling in differential analog input signal and the first reference signal, With sampling apparatus, N is performed to differential analog input signal and the second reference signal 1individual sampling operation, N 0equal N-N 1, wherein at N 1the first stage of individual sampling operation, to a sampling in differential analog input signal and the second reference signal, at N 1the second stage of individual sampling operation, to another sampling in differential analog input signal and the second reference signal, performs N 1individual sampling operation and execution N 0individual sampling operation universally from providing the differential analog input signal source of differential analog input signal to extract the average differential current be substantially zero, Wherein said differential analog input signal comprises the amplitude V being more than or equal to the first reference signal l, and be less than or equal to the amplitude V of the second reference signal hamplitude V i, wherein the amplitude of the second reference signal is greater than the amplitude of the first reference signal, and wherein N 1=N* (V i-V l)/(V h-V l).

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