Hi everyone,
I'm a newbie at audio amplifiers and I'm studing in Bob Cordell's book "Designing Audio Power Amplifiers", I've only made two designs but never tested it yet.
I've a question to do:
Which is the best current source, in terms of linearity, thermal stability and output resistance?
In both books I've got from Bob Cordell and Randy Slone the best current source is allways the feedback current source, in which both transistors act together to mantain their collector currents. Another form of making a current source is using a current mirror with a known voltage and a resistor (I think that this could also be made with a wilson current mirror or enhanced current mirror), this current mirror should be degenerated with 10:1 degeneration or a little more. The other type of current source which is also an acceptable design is the current source based on diode anode-cathode (Vak) voltage, you could use normal silicon diodes such as 1N4*** series, a led or a zerner diode.
Thank you very much for your atention,
Best regards,
Daniel Almeida
I'm a newbie at audio amplifiers and I'm studing in Bob Cordell's book "Designing Audio Power Amplifiers", I've only made two designs but never tested it yet.
I've a question to do:
Which is the best current source, in terms of linearity, thermal stability and output resistance?
In both books I've got from Bob Cordell and Randy Slone the best current source is allways the feedback current source, in which both transistors act together to mantain their collector currents. Another form of making a current source is using a current mirror with a known voltage and a resistor (I think that this could also be made with a wilson current mirror or enhanced current mirror), this current mirror should be degenerated with 10:1 degeneration or a little more. The other type of current source which is also an acceptable design is the current source based on diode anode-cathode (Vak) voltage, you could use normal silicon diodes such as 1N4*** series, a led or a zerner diode.
Thank you very much for your atention,
Best regards,
Daniel Almeida
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