In most op amp circuits it is imperative that the input connections have a DC return path back to ground. Without this, proper bias of the input stage cannot be maintained, and the circuit will not function as expected. This video investigates this topic with both non-inverting and inverting voltage amplifiers as examples.
References: Operational Amplifiers: Theory and Application, Chapters 2 and 4.
My free texts and lab manuals are available for download at my college web site [ Ссылка ] and at my personal site [ Ссылка ]
Inexpensive print and kindle copies are available at Amazon [ Ссылка ]
If you like my texts and videos, and would like to help defray the costs of making and maintaining them, consider making a modest donation at [ Ссылка ]
Ещё видео!