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Multiplication circuit for multiplying analog signals by digital signals

  • US 5,420,806 A
  • Filed: 01/13/1994
  • Issued: 05/30/1995
  • Est. Priority Date: 01/13/1993
  • Status: Expired due to Fees
First Claim
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1. A multiplication circuit for multiplying an analog signal and a digital signal having bits comprising:

  • a plurality of first capacitances arranged so as to correspond to groups in which said bits of said digital signal are classified, each said first capacitance having a capacitance value corresponding to a bit weight to be assigned to said bits of each said corresponding group;

    a plurality of second capacitances arranged so as to correspond to each bit that is included in each of said corresponding groups, each said second capacitance having a capacitance values corresponding to a bit weight to be assigned to each said bit; and

    a plurality of switching means for connecting said analog signal to each said first capacitance.

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