| 摘要 |
PURPOSE:To prevent frequency response in voltage/current conversion from being deteriorated even when an applied DC voltage is decreased by connecting constant current sources to the input terminal and the output terminal of a current mirror circuit, respectively. CONSTITUTION:The current mirror circuit 1 is constituted of transistors Q1 and Q2, and a signal input terminal 5 is connected to the input terminal of the circuit via a resistor R1, and the output terminal is set as a signal output terminal 4. A first constant current source 2 for bias is connected to the input terminal, and a second constant current source to correct a bias current is connected to the output terminal. Eve when the DC voltage V1 to be applied on the signal input terminal 5 is decreased, a current almost equivalent to a bias current flows on the transistor Q1 comprising the current mirror circuit 1. |
