| 摘要 |
<p>A differential circuit comprised of a pair of transistors (11, 12) has one transistor supplied with a reference voltage and the other transistor supplied with an input voltage, and is driven by a first constant current source. The pair of transistors are operated as an emitter-follower mode. An input side transistor (14) in a current mirror circuit is connected to the collector of the reference voltage side transistor of the difference circuit and an output side transistor (15) of the current mirror circuit is driven by a second constant current source. An output transistor (17) is driven through the output side of the current mirror circuit.</p> |
