Hi,
here is the schematics of headphone amplifier. It is DOGC amplifier by Dr. Bora Jagodic, but without current dumping class C stage, lower rail voltages and gain set to 6x.
Design has not been build yet. It is recommende to use different P-channel mosfet than IRF, becuase of the transconductance problem. I will be using FQP7P06. Bias current is 200mA for output fets and 20mA for input fets. Note that input fets will require small heatsink!
Schematic is not final, I will add DC servo later.
For PSU I was thinking about using Super regulator by Jung / Didden.
I will be designing PCB boards too, but later.
here is the schematics of headphone amplifier. It is DOGC amplifier by Dr. Bora Jagodic, but without current dumping class C stage, lower rail voltages and gain set to 6x.
Design has not been build yet. It is recommende to use different P-channel mosfet than IRF, becuase of the transconductance problem. I will be using FQP7P06. Bias current is 200mA for output fets and 20mA for input fets. Note that input fets will require small heatsink!
Schematic is not final, I will add DC servo later.
For PSU I was thinking about using Super regulator by Jung / Didden.
I will be designing PCB boards too, but later.
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Why? Are you interested in an HP amp?
I am using one that Hugh designed in about 2008 which performs really well. Two transistors only, class A, driven from a 12 -15VDC wall wart.
Ha ha,.. I have a lot of headphone amps designed by Hugh using only two actives, and always cap coupled output. Too dangerous and complex to do otherwise with headphones. They do sound great.
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