| 摘要 |
Disclosed is a differential amplifier circuit which includes a first NPN transistor, a second NPN transistor, a current source connected to the emitters of the first and second NPN transistors, a first PNP load transistor having a collector connected to the collector of the first NPN transistor, a second PNP load transistor having a collector coupled to the collector of the second NPN transistor, and an FET having a gate connected to the collector of the first NPN transistor, and a source connected to the bases of the first and second PNP load transistors. A DC input current of the FET is substantially zero, and is designed to absorb a current corresponding to the gate potential of the FET, from the bases of the first and second PNP load transistors.
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