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

Signal Generator 20KHz
Electronic phone bell
LED Color Fade Effect circuit diagram
Brightness controller for low power lamps
UPB1009K Necs Low Power Gps Rf Receiver Bipolar Analog Integrated Circuit
Cool gradually dimming light switches