Preamp info help

What are characteristics of signal to amplify. is it rippled Dc or AC, is output must be AC or can be Rippled dc what are frequency limit of this signall and what impedance source presents and how much this source can be loaded. And is this should be a discrete amp or integratet ?

The amplified signal should be AC (from phone) and should be 350mv to 900mv

And u preffer discrete or IC amplifier used ??

Discreet single or two stage amplifier should do.

Its input and output impedances should be medium high and the input is 350mv AC Ueff output should be around 900mv AC Ueff the stabilisation circuit for the preamp is Lm7812 so low noise should come from it

Ok now i know all i need and propably i have something interesting in mind. A single stage whose join common emiter and common collector in single unit. Ofcourse it has not so higb voltage gain as pure CE stage but is still damn high and apply voltage gain up to 15-20 times inpit voltage withot problem. It has also somewhat high input impedance and rrather low output one but is tweakable and can be set for some degree to match our need and those are common collector amp features. Ofcourse those are also not as impresive as i pure CC but i can say that 70% or 80% of pure stage features can be achieved. A disadvantage whose inwill need to overcome somehow is ground separation required for signal ground and power suply ground. As i overcome thismproblem uwill be noticed

I do have something in mind A low noise class AB amplifier but it requieres 900mv input so I need a good preamp