Stability, with time and temperature but I think in a normal audio application it is not very important especially if opamps are used... except for nerds which require x.000 V and ppm in stability. Personally I think it's cool when I get unexpected precision. I have soldered a regulator, completely untrimmed, with 4.999 V out measured with a calibrated voltmeter
Agree. It is just a small deviation from the nominal 15V. Completely irrelevant in the grand scheme of things.
Also, the zener voltage for the zener in series with the opamp output is very uncritical. It is only there to make sure that the opamp output is somewhere around the middle of it's supply voltages, which here is gnd and Vout.
So for 24V, the zener on the opamp output can be anything between 5V and 18V, for instance. But if you are getting a 12V zener for the ref, that'll work also for the opamp.
Jan
Also, the zener voltage for the zener in series with the opamp output is very uncritical. It is only there to make sure that the opamp output is somewhere around the middle of it's supply voltages, which here is gnd and Vout.
So for 24V, the zener on the opamp output can be anything between 5V and 18V, for instance. But if you are getting a 12V zener for the ref, that'll work also for the opamp.
Jan
In my case it's 15v for both zeners, because I want a 30v output.
In fact that made it practically impossible for me to use a pre-regulator, as Walt suggested, because of the 35v input voltage some regulators need. Only if I regulated the input into the regulator, which should be crazy.
I also had considered using a CRC or capacitance multiplier filter before the regulator, which also gobbled more volts, making things plain foolish.
As it is now I plan to use a simple RC filter before the standard (I call it simplistic) Jung-Didden reg. And that's all.
In fact that made it practically impossible for me to use a pre-regulator, as Walt suggested, because of the 35v input voltage some regulators need. Only if I regulated the input into the regulator, which should be crazy.
I also had considered using a CRC or capacitance multiplier filter before the regulator, which also gobbled more volts, making things plain foolish.
As it is now I plan to use a simple RC filter before the standard (I call it simplistic) Jung-Didden reg. And that's all.
Superreg supply circuit
Hello.
I will build +-15V superreg for DAC opamp based output stage (Tweasted Pear I/V)
Is it enough to have simple shotky rectifier + Panasonic FC caps bank for superreg or the stabilised sypply is needed for better result?
thank you for help
Hello.
I will build +-15V superreg for DAC opamp based output stage (Tweasted Pear I/V)
Is it enough to have simple shotky rectifier + Panasonic FC caps bank for superreg or the stabilised sypply is needed for better result?
thank you for help
jan.did den;6055972 said:
