Op Amp Single DC Supply Biasing

Welcome to the video series The Operational Amplifier - From Abstraction to Reality. This video describes how to bias an op amp to operate on a single power supply. For symmetric dynamic range of an AC amplifier without dual supplies, an artificial ground or middle bias source must be developed. The concept of bias injection is explored along with the effect of the cutoff frequency of multiple capacitively coupled networks on the overall frequency response. Download the applicable spreadsheet: https://github.com/oldhackEE/Electrical-Engineering-With-Excel/blob/0043af13bfd08b22ff259d29e604cb1aa7bbb140/Single%20Supply%20AC%20Coupled%20Opamp.xlsm 00:00 Intro 00:18 Dual Supplies for Op Amps and It's Advantages 01:01 Typical Single Supply Sources 01:31 Single Supplies for Op Amps 02:16 Capacitor Coupling of AC Signals and Bias Injection 03:28 Middle Voltage Bias 05:32 AC Coupled Amplifiers 06:11 Non-Inverting AC Coupled Amplifier 08:29 Cascaded Response 10:28 Individual Stage Responses vs. Cascaded Response 11:21 Inverting AC Coupled Amplifier 12:50 Turn-On Time Issues 13:20 Remove Bias From Output