Well, currently I'm more interested in the second solution, although it may turn out it is not accurate enough. IanP, again thaks for your help, and small question, could you put here the second amplifier in a better quality, so the names of transistors, values of passive component are visible? If you don't have time to put it, just give some link to this, or similar schematics.
Regarding the first schematic - were can I find values/types of used components?
Thank you in advance.