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Amplifier circuit

  • US 6,218,906 B1
  • Filed: 03/06/2000
  • Issued: 04/17/2001
  • Est. Priority Date: 08/14/1998
  • Status: Expired due to Fees
First Claim
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1. An amplifier circuit, comprising:

  • a first transistor of a first conductivity type having a control input receiving an input signal and a controlled path having a first end to be connected to a first supply potential and a second end;

    a second transistor of the first conductivity type having a control input receiving a bias potential and a controlled path with a first end connected to said second end of said controlled path of said first transistor and a second end outputting an output signal; and

    a first resistor having a first terminal connected to said second end of said controlled path of said second transistor and a second terminal to be connected to a second supply potential;

    a capacitor having a first terminal connected to said control input of said first transistor and a second terminal;

    a third transistor of a second conductivity type having a control input connected to said second end of said controlled path of said second transistor and a controlled path with a first end to be connected to the second supply potential and a second end;

    a fourth transistor of the second conductivity type having a control input connected to said second end of said controlled path of said third transistor and a controlled path with a first end connected to said control input of said third transistor and a second end;

    a second resistor connected between said control input of said fourth transistor and said second terminal of said capacitor; and

    a third resistor connected between said second end of said controlled path of said fourth transistor and said first terminal of said capacitor.

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