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Integrated analog-to-digital converter

  • US 4,796,004 A
  • Filed: 02/14/1986
  • Issued: 01/03/1989
  • Est. Priority Date: 02/14/1986
  • Status: Expired due to Term
First Claim
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1. An integrated analog-to-digital converter comprisingg a second order delta sigma modulator for generating a single bit per time output signal and a decimator for reducing the sampling rate of said modular output signal by a rational number and generating a pulse code modulated word, said modulated comprising first and second summation means, each having first and second inputs and an output, first and second filter means, bistable means, and inverter means, said first input of said first summation means being operably connected to receive the analog input, the input of said first filter means being operably connected to the output of said first summation means, said fist input of said second summation means being operably connected to the output of said first filter means, the input of said second filter means being operably connected to the output of said second summation means, the input of said bistable means being operably connected to the output of said second summation means, the input of said bistable means being operably connected to the output of said second filter means, said inverter means being operably connected between the output of said bistable means and said second input of said second summation means, said output of said bistable means being operably connected to said second input of said first summation means and to form the modulator output, each of said filter means comprising CMOS push/pull amplification means.

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