Mr Pass ZEN is something I always return to.
This amplifier uses a ZEN input + VAS.
Drives the output in Push-Pull Class AB.
Output is biased 275mA.
Max Power out is a bit more than 16 Watt at THD 0.100%
At 1 Watt the distortion is 0.013%
The voltage Gain is like x12.
This amplifier uses a ZEN input + VAS.
Drives the output in Push-Pull Class AB.
Output is biased 275mA.
Max Power out is a bit more than 16 Watt at THD 0.100%
At 1 Watt the distortion is 0.013%
The voltage Gain is like x12.
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There is no need for compensation caps.
Bandwidth is 3Hz - 200kHz.
That is enough to make a good audio amplifier.
Bandwidth is 3Hz - 200kHz.
That is enough to make a good audio amplifier.
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I thank Nelson Pass for liking this my design.
Now improved.
Higher bandwidth: 350kHz
Lower distortion: THD 0.008%
Better bias: 230mA
Now improved.
Higher bandwidth: 350kHz
Lower distortion: THD 0.008%
Better bias: 230mA
This is the designed amplifier I am most pleased with.
Even Nelson himself likes it.
You should build it. It is simple but good.
It delivers 16 Watt with rather low distortion.
Even Nelson himself likes it.
You should build it. It is simple but good.
It delivers 16 Watt with rather low distortion.
Redesign.
Added ZVP3310A as current source.
Bias increased to 500mA in output stage.
THD 0.001% at 1 Watt
THD 0.006% at 4 Watt
Added ZVP3310A as current source.
Bias increased to 500mA in output stage.
THD 0.001% at 1 Watt
THD 0.006% at 4 Watt
Fully Class A bias.
With bias 1.1A gives the following result:
Output / Distortion THD %
01 Watt: 0.0005 %
04 Watt: 0.0013 %
10 Watt: 0.0042 %
16 Watt: 0.0143 %
With bias 1.1A gives the following result:
Output / Distortion THD %
01 Watt: 0.0005 %
04 Watt: 0.0013 %
10 Watt: 0.0042 %
16 Watt: 0.0143 %
Please post in English. Translation:
30V power supply, but the output cannot be adjusted to 15V. I don't know what's wrong with N3310A, the voltage drops to more than 2V when it is adjusted to 15V.
Nice design
40Vdc is a rare value for Vcc, would it be simpler to modify the circuit and use bipolar supply like the traditional +/- 24Vdc and also get a little more output power ?
This would be the perfect amp to use the ALFET lat MOSFET Mr Pass / Jugi63 recently generously donated 👍
40Vdc is a rare value for Vcc, would it be simpler to modify the circuit and use bipolar supply like the traditional +/- 24Vdc and also get a little more output power ?
This would be the perfect amp to use the ALFET lat MOSFET Mr Pass / Jugi63 recently generously donated 👍
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U2 can be a BJT. In my original it is a little MOSFET.
Like @once1268 circuit.
@e_fortier
What is ALFET lat MOSFET? Have you a link?
Like @once1268 circuit.
@e_fortier
What is ALFET lat MOSFET? Have you a link?
English please. Further posts will not be approved.
The actual current is between 0.9A and 1A, and the audition sound is good, but unfortunately the gain is not enough and the volume is insufficient. Prepare to modify the intended 2SK170 pre-
