Constant-current source circuit and differential amplifier using

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

1984-10-29

1987-01-13

LaRoche, Eugene R.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330277, 330289, H03F 130

Patent

active

046367420

ABSTRACT:
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.

REFERENCES:
patent: 3419810 (1968-12-01), Xylander
patent: 3431508 (1969-03-01), Soltz et al.
patent: 3886435 (1975-05-01), Steckler

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