In my project, I used OP-AMP as a differential amplifier with single-ended output.
The problem is, I can't use op-amp itself. I need to model it with transistors and resistors, without using any IC's or current sources. My idea was to use BJT differential amplifier with current mirror as a current source but I faced a problem. Both differential amplifier and current source work seperately, but when you connect them together, current source is not working. Any suggestions?
The problem is, I can't use op-amp itself. I need to model it with transistors and resistors, without using any IC's or current sources. My idea was to use BJT differential amplifier with current mirror as a current source but I faced a problem. Both differential amplifier and current source work seperately, but when you connect them together, current source is not working. Any suggestions?