Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
Welcome to our site! Electro Tech is an online community (with over 170,000 members) who enjoy talking about and building electronic circuits, projects and gadgets. To participate you need to register. Registration is free. Click here to register now.
High-Side Current Source with Differential Inputs - Generates constant current to a grounded load as determined by the differential input voltage
Simple high-side current sources that can be controlled by a ground referenced signal are not common. Below is the schematic of such a circuit, a high-side current source the delivers a constant current to a grounded load as controlled by the voltage difference between the differential inputs. The circuit uses a P-MOSFET controlled by an op amp differential circuit. This works because the input resistor that normally goes to ground in such a circuit (R5) instead goes the the V+ supply....
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
