Classic Circuits You Should Know: Transconductance Amplifier

In this video we look at a transconductance amplifier. Quite a simple circuit that uses a potentiometer to control differential voltage into the input side of an opamp. a feedback loop and current limiting resistor complete the circuit. Place the load between the output of the opamp and the current limiting resistor and by adjusting the trimmer you will have very precise control of the output current. (The voltage is stable) You can read more about TA’s here: 1. Elecrow Back to School Sale: 2. Special promotion for PCBs, 3D printing, and acrylic laser cutting: 3. Elecrow PCBA Automotive Services promotion link: ************************************************************************* *Please help support this channel at NO COST TO YOU. If you shop on* *Amazon, please use this link: * *I will get a small commission and it costs you nothing. * ************************************************************************* HEY YOU ABOUT TO POST SOMETHING STUPID: Yes, I know my hands are large/fat. It’s because of a heart condition I suffer from called Congestive Heart Failure. Here’s a link to some information about CHF: One of the symptoms is that it causes fluid retention, mostly in the hands, feet/ankles, and face.. ------------------------------------------------------------------------------------------------------------------- Support learnelectronics: Amazon Store: If you are shopping for electronic components, test gear or consumables please consider visiting my Amazon shop @ Patreon: Please check out and pledge a dollar if you can. It will go a long way to keeping the channel alive. It costs a bit of money to buy all the items and produce these videos. Your help is appreciated. Paypal: you’d like to send a one-time donation you can use this link: --------------------------------------------------------------------------------------------------------------------- Gear I use: Multimeter: OWON B33 Oscilloscope: KIPRIM DS1202 Signal generator: Junctek JDS8080 Component Tester: T7 Multifunction Soldering Station: Sealody ???????