If I put my notes here, I might be able to find them again later!
Discrete transistor line amplifier stage mod 1
Changed the collector load on the voltage amplifier stage to a current source (Q3), as per the Marantz SR2285B circuit.
Also increased the resistance of the feedback connection, R6+R8, there seemed to be no obvious advantage in making it much smaller than the typical load (>10k). The compensation capacitor C2 is increased to match, to flatten the HF response.
The circuit can drive light loads to +20 dB. Of course that's not much of a challenge for this general class of circuit.
I'm a bit stumped as to what the next logical step is from here. Seems to me to depend on what you actually want the circuit to do.
Also increased the resistance of the feedback connection, R6+R8, there seemed to be no obvious advantage in making it much smaller than the typical load (>10k). The compensation capacitor C2 is increased to match, to flatten the HF response.
The circuit can drive light loads to +20 dB. Of course that's not much of a challenge for this general class of circuit.
I'm a bit stumped as to what the next logical step is from here. Seems to me to depend on what you actually want the circuit to do.
Total Comments 0
