Title: Operating amplifier with current feedback
Application Number: 01104013 Application Date: 2001.02.14
Publication Number: 1369962 Publication Date: 2002.09.18
Approval Pub. Date: Granted Pub. Date: 2004.03.03
International Classifi-cation: G06G7/12,H03F1/34,H03F3/45
Applicant(s) Name: Xitong Science and Technology Co Ltd Address:
Inventor(s) Name: Liu Hongzhi
Attorney & Agent: jian wei
Abstract:
     The invention relates to an operational amplifier of current feedback. Its input end is connected to the first amplifier. The output of the first amplifier goes to multi-inputted pair of grid of transistor, and a source of one of inputted pair transistors is connected to one of the inputted ends so as to form a feedback between the first and inputted pair transistors. Input impedance, offset voltage and gain error is lowered through the eedback circuit. The input impedance in the invention will be lowered to 1/A 1 of original impedance so that aspect ratio of inputted pair transistors needs not too large.
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