Constant-current source circuit and differential amplifier...

Details Constant-current source circuit and differential amplifier... Constant-current source circuit and differential amplifier...

H - Electricity

03

F

330/20

H03F 3/45 (2006.01) G05F 3/20 (2006.01) G05F 3/22 (2006.01) G05F 3/24 (2006.01) H03F 1/30 (2006.01)

Patent

CA 1224543

CONSTANT-CURRENT SOURCE CIRCUIT AND DIFFERENTIAL AMPLIFIER USING THE SAME ABSTRACT OF THE DISCLOSURE A constant-current source circuit and a differential amplifier using the same. The temperature compensation of the output current of the constant-current source circuit is effected by using the threshold voltage characteristic of a transistor such as a MOS transistor or a bipolar transistor. The constant-current source circuit includes one or more constant-current source circuit units. When the constant-current source circuit includes two constant-current source circuit units, one of the units has a positive temperature coefficient and the other has a negative temperature coefficient. The output currents of these two units are combined by a current synthesizing circuit so as to realize any desired temperature characteristic.

466044

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