Title:
FILTER CIRCUIT
Document Type and Number:
Japanese Patent JP3125525
Kind Code:
B2
Abstract:
PURPOSE: To decrease an input output offset voltage and to increase a doubling coefficient without resistors of larger or smaller resistance making circuit integration different and without increasing the capacitance of capacitors.
CONSTITUTION: A comparator circuit 200 detects and compares a voltage between an input terminal 106 and an inverting input section of an operational amplifier (AMP1) 105 and a voltage controlled current source 300 supplies a current to generate a voltage in polarity opposite to that of a voltage between the input terminal 106 and the inversion input part of the operational amplifier (AMP1) 105 based on the result of comparison, thereby suppressing a current flowing to a 1st resistor 101 and decreasing the input output offset voltage generated between input and output of the filter circuit.
Inventors:
Kazuhiko Hamaoka
Takahito Ohkubo
Takahito Ohkubo
Application Number:
JP19347393A
Publication Date:
January 22, 2001
Filing Date:
August 04, 1993
Export Citation:
Assignee:
Nissan Motor Co., Ltd
International Classes:
H03H11/12; (IPC1-7): H03H11/12
Domestic Patent References:
| JP2250515A | ||||
| JP1316014A | ||||
| JP2137408A |