| 摘要 |
PURPOSE:To transmit the DC voltage with isolation and with a simple constitution and good accuracy and to minimize the current flowing to the input side, by obtaining the DC output voltage isolated with the DC input signal and having proportional DC output voltage at the output side of the smooth circuit. CONSTITUTION:The DC input signal voltage is fed to the input winding of the transformer 3 via the clamp circuit 4, and the unit provides the smooth circuit 6 connected to the output winding of the transformer 3 via the clamp circuit 5 and the exciting circuit 6 supplying the exciting current to the transfomer 3 in ON-OFF manner. Further, the circuit 8 is so constituted that the exciting current can be changed related to the amplitude of the input signal voltage, and the exciting current is fed in the direction that the input and output clamp circuits 4 and 5 can not be operated. Further, when the exciting current is OFF, the counterelectromotive force taken place between the windings of the transformer 3 operates the clamp circuits 4 and 5, allowing to obtain the DC output signal voltage which is isolated from the DC input signal voltage and is in proportional to the amplitude at the output side of the circuit 6. |
