Patent ID: 6218906
Filing Date: 2001-04-17
Classification: H03F

Abstract:
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; anda 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; anda third resistor connected between said second end of said controlled path of said fourth transistor and said first terminal of said capacitor.