Hi, i'm currently doing research on EMG, but got problems when creating Instrumentation Amplifier(INA) using ic TL082. There were offset voltage after the output from INA. Maybe if you can help i will really appreciate it.
You will find schematic on the link in the video description. Implemented INA is actually AC amplifier and also second amplifying stage has decoupling capacitor. Power supply is bipolar. This should eliminate offset voltage
@@optolab thanks for your advice, I've try those decoupling capacitor and it removes offset on my INA, but the frequency response isn't flat, the response look like lowpass filter. Maybe any other method to removes the offset voltage that didn't affect frequency response ? 🙏
Feedback capacitor C3 in combination with feedback resistor defines INA low pass freq. You can also adjust output offset voltage by applying voltage at R7 (instead of wiring it to the ground). Try using some simualtion software for adjusting frequency response of your amplifier (MicroCap, Tina-TI,...)
Hi, i'm currently doing research on EMG, but got problems when creating Instrumentation Amplifier(INA) using ic TL082. There were offset voltage after the output from INA. Maybe if you can help i will really appreciate it.
You will find schematic on the link in the video description. Implemented INA is actually AC amplifier and also second amplifying stage has decoupling capacitor. Power supply is bipolar. This should eliminate offset voltage
@@optolab thanks for your advice, I've try those decoupling capacitor and it removes offset on my INA, but the frequency response isn't flat, the response look like lowpass filter.
Maybe any other method to removes the offset voltage that didn't affect frequency response ? 🙏
Feedback capacitor C3 in combination with feedback resistor defines INA low pass freq. You can also adjust output offset voltage by applying voltage at R7 (instead of wiring it to the ground). Try using some simualtion software for adjusting frequency response of your amplifier (MicroCap, Tina-TI,...)