high-side current without external supply


Posted on Nov 15, 2012

An alternative approach for this application takes advantage of low-offset op-amp characteristics to design a circuit that works with a wide voltage range and needs no other supply. The V+ and inverting and noninverting terminals of the OP07 op amp need a minimum of approximately 2 to 2.5V to function properly. Thus, you can pull the op amp`s inputs by more than 2.5V below the positive-supply connection and tie the op amp`s V+ pin to shunt V+ (Figure 2)



This approach has many advantages. An external supply is unnecessary. The circuit is suitable for bus voltages of 5 to 60V with component changes. Other circuits have limitations due to op-amp absolute-maximum voltage ratings. The circuit acts as the mini




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

two-tone generator
Low-frequency-transmitter
Fast High-Voltage Linear Power Amp Circuit
Furnace Fuel Miser Circuit
ssl3250a photo flash led driver circuit
mains pulse circuit
three channel audio mixer circuit
Arduino Analog Read Potentiometer to Digital Out LED
RF field strength meter



Top