Title:
【発明の名称】電子回路、差動増幅回路、及びアナログ乗算回路
Document Type and Number:
Japanese Patent JP2823229
Kind Code:
B2
Abstract:
Disclosed is an electronic circuit comprising commonly connecting the gate end of a first transistor(TR1) having a floating gate(FG1) and the source end and the drain end of a second transistor(TR2) having a floating gate(FG2) to a first control input terminal, and commonly connecting the source end and the drain end of the first transistor(TR1) and the normal gate end of the second transistor(TR2) to a second control input terminal. The electronic circuit can repeatedly set and maintain accumulation charge amounts of the respective floating gates(FG1,FG2) of the first and the second transistor(TR2) at predetermined values. Also disclosed is an electronic circuit including the above electronic circuit, and further comprising commonly connecting the respective source ends of a third and a fourth transistor(TR3,TR4) to a first terminal(N1) to compose a first differential couple, providing a current source between the first terminal(N1) and a power source end or an earthed end, connecting the floating gates(FG1,FG3) of the first and the third transistor(TR1,TR3) together, connecting the floating gates(FG2,FG4) of the second and the fourth transistor(TR2,TR4) together, connecting the normal gate end of the third transistor(TR3) to a first positive input terminal(IN11), and connecting the normal gate end of the fourth transistor(TR4) to a first negative input terminal(IN12). The so-composed electronic circuit can repeatedly set and maintain threshold values in differential amplification at respective predetermined values. Further disclosed is an analog multiplicaiton circuit comprising combination of these electronic circuits and an amplification circuit, which can repeatedly set and maintain weight concerning multiplication factors at predetermined values.
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Inventors:
Ken Shima
Application Number:
JP8470589A
Publication Date:
November 11, 1998
Filing Date:
April 05, 1989
Export Citation:
Assignee:
Toshiba Corporation
International Classes:
G11C17/00; G06G7/163; G06G7/60; G06N3/063; G11C16/02; H01L21/822; H01L21/8247; H01L27/04; H01L29/788; H01L29/792; H03F3/45; H03G3/10; H03K19/00; (IPC1-7): G06G7/163; G06G7/60; G11C27/00; H01L21/8247; H01L29/788; H01L29/792; H03G3/10; H03K19/00
Attorney, Agent or Firm:
Hidekazu Miyoshi (1 outside)