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High-speed, low-power continuous-time CMOS current comparator

  • US 6,320,427 B1
  • Filed: 10/11/2000
  • Issued: 11/20/2001
  • Est. Priority Date: 10/11/2000
  • Status: Expired due to Term
First Claim
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1. A current comparator, comprising:

  • a CMOS complementary amplifier to receive an input current from an input node and generate correspondingly output voltage at an output node, comprising;

    a NMOS and a PMOS connected in series, the NMOS and the PMOS having control gates that connect to form the input node, the NMOS and the PMOS having drain electrodes coupled to the output node; and

    a resistive feedback circuit connected between the input node and the output node; and

    a secondary amplifier to receive the output voltage at the output node and output a corresponding rail-to-rail result signal.

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