| 摘要 |
PURPOSE:To prevent gain variation by connecting a load to the collector of a transistor (TR), and flowing a current equal to the base current of the TR to the collector forcibly. CONSTITUTION:Transistors (TR)Q11 and Q12 constitute a differential couple and a signal source Si is connected between input terminals 11 and 12. The current flowing through a current source I12 connected to the collector of a TRQ16 is equal to the current of a current source I1. A current equal to the base current of the TRQ11 flows to the base of a TRQ14. Therefore, the influence of variation in the base current of the TRQ11 is canceled by the base current of the TRQ14 and there is no influence of variation in current amplification factor.
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