I am building a simple modular synthesizer. I would like to keep everything simple and prefer to use discrete components over integrated circuits. My goal is to improve my knowledge about electronics.
How can I amplify a signal which has a DC component (e.g. 1V DC + a sine wave which is 1V peak to peak) without using an opamp?
It is easy to amplify a pure AC signal with a transistor, some resistors, and 2 capacitors (to decouple DC at input and output). However, now I want to also amplify the DC component, so the decoupling with the capacitors is not possible.
I am looking for a solution that doesn't have DC drift with temperature change, but it doesn't need to be perfectly linear.