Buffer leakage current measurement circuit diagram OPA111 INA117


Posted on Mar 28, 2007

As shown in FIG OPA111 constituted by the input buffer leakage current measuring circuit. D1, D2 of the transistor 2N3904, which will short the base and collector contact (open


Buffer leakage current measurement circuit diagram OPA111 INA117
Click here to download the full size of the above Circuit.

emitter). Up to 200V power is applied to the device under test, leakage current flows through 100M sampling resistor, forming a voltage drop across the sampling resistor, the voltage drop after the buffer input to the INA117 amplifier output, the output voltage eo IL 109 (1V/nA). Because you want to measure low leakage current, measurement circuit to prevent shunt caused by measurement error, so the use of high input resistance measurements constitute a buffer circuit. With an isolated power supply OPA111 op amp power supply, so the circuit allows 200V common-mode range.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Quick Multiconductor Cable Tester
Fast Symmetrical Zener Clipper
Digital To Analog Converter Circuit
Lead-Acid Battery Charger circuit diagram
home security system
two stage fm transmitter bug more tank circuits
Electronic Thermometer Circuit
Mini efficient coil launcher from disposable camera flashs
Video circuits
How To Build A Simple Current Limiting Bench Power Supply
The pulse width detection circuit 555
5V TOP414G 2A isolated switching power supply circuit



Top