| 摘要 |
PURPOSE: To obtain isolation and adaptation excellent over a wide frequency band by providing a negative feedback amplifier used opposite of its substantial purpose to an isolator circuit. CONSTITUTION: The isolation circuit is made up of a field effect transistor(FET) T, having a source S, a gate G and a drain D. The FET T1 is used as a negative feedback amplifier used opposite of its substantial purpose. For this purpose, a negative feedback branch including a resistor RF is connected between the gate and the drain of the FET T1 , an input signal is applied between the source and the drain and an output signal is extracted between the source and the drain. Thus, the isolation and adaptation excellent over a wide frequency band are obtained. |
