Precision current sink


Posted on Feb 13, 2013

The 2N5457 JFET and PN2222 bipolar have inherently high output impedance. Using Rl as a current sensing resistor to provide feedback to the LM101 op amp provides a large amount of loop gain for negative feedback to enhance the true current sink nature of this circuit


Precision current sink
Click here to download the full size of the above Circuit.

For small current values, the 10K resistor and PN2222 may be eliminated if the source of the JFET is connected to Rl.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

27Mhz and 49Mhz rf oscillator-transmitter
Transistor Sensor Temperature Measurer
Injector Pulse Width Monitor with LM324 LM3914
basics of electricity
Manage the application of the chip in high-performance linear lithium battery charge
electronic timer with display circuit
radio circuit diagram
Static Electricity / Negative Ion Detectors
FM transmitter circuit diagram
Capacitive Touch Sensor
Circuit explanation for the ultrasonic alarm
Tube mic Connecting the capsule 2
Multi power failure alarm circuit
FM demodulator circuit diagram 567



Top