Title:
SQUARE ROOT CIRCUIT
Document Type and Number:
Japanese Patent JP2551387
Kind Code:
B2
Abstract:
PURPOSE: To provide a square root circuit having no dispersion in temperature and manufacturing characteristics.
CONSTITUTION: This square root circuit is constituted of the feedback route of an operational amplifier 2 and a square rule circuit and the square rule circuit is constituted of a differential pair circuit to be driven by a sum current of a current equal to the drain current of a 1st transistor(TR) M1 of 1st and 2nd TRs M1, M2 constituting the differential pair circuit and a constant current. The output voltage of the square root circuit does not depend upon the threshold voltage of a MOS TR constituting the differential pair circuit.
Inventors:
KIMURA KATSUHARU
Application Number:
JP21918694A
Publication Date:
November 06, 1996
Filing Date:
September 13, 1994
Export Citation:
Assignee:
NIPPON ELECTRIC CO
International Classes:
G06G7/20; (IPC1-7): G06G7/20
Attorney, Agent or Firm:
Naoki Kyomoto (2 outside)