Patent ID: 6037836
Filing Date: 2000-03-14
Classification: H03F

Abstract:
A switched-capacitor amplifier circuit having an input terminal comprising:an operational amplifier having an input terminal and an output terminal;a first capacitor having a first end connected with the input terminal of said operational amplifier and a second end;a second capacitor having a first end connected with the input terminal of said operational amplifier and a second end;a first switching circuit having a first end connected with the input terminal of said operational amplifier and a second end;a second switching circuit connected with the second end of said first capacitor;a third capacitor having a first end, connected with the second end of said first capacitor and a second end;a third switching circuit connected between the second end of said third capacitor and the input terminal of said switched-capacitor amplifier circuit;a fourth switching circuit connected between the second end of said third capacitor and an analog ground;a fifth switching circuit connected between the second end of said second capacitor and the output terminal of said operational amplifier;a sixth switching circuit connected between the send endsaid second capacitor and an analog ground;a seventh switching circuit connected between the second end of said first switching circuit and an analog ground; anda fourth capacitor connected between the second end of said first switching circuit and the output terminal of said operational amplifier.