Title:
GAIN CONTROL CIRCUIT
Document Type and Number:
Japanese Patent JP2002016460
Kind Code:
A
Abstract:
To provide a miniaturized low-cost gain control circuit, with which the control of the dispersion of a signal or a circuit constant or change of a circuit gain is facilitated and a large number of parts can be made into monolithic IC.
A switch element 2 is parallel or serially inserted to a resistor R0 for determining the gain of an operational amplifier 1 for amplifying or attenuating a signal and by changing a duty ratio α of a switching signal Vp to this switch element, the gain control circuit changes the resistance value of the resistor R0.
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Inventors:
ABE MINORU
Application Number:
JP2000193225A
Publication Date:
January 18, 2002
Filing Date:
June 27, 2000
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
H03G3/12; H03G3/02; (IPC1-7): H03G3/12; H03G3/02
Attorney, Agent or Firm:
Soga Doteru (6 people outside)