Pro Audio Design Forum

Insertion loss. Theoretical values calculated with Spice. 10nF and 16K as " Nacho 1KHz notch filter". Notch 994.7 Hz 100 Hz -0.66 dB 200 Hz -2.31 dB 500 Hz -9.16 dB 2KHz -9.03 dB 3KHz -5.08 dB 4KHz -3.27 dB 5KHz -2.27 dB 6KHz -1.66 dB 7KHz -1.26 dB 8KHz -0.99 dB 9KHz -0.79 dB 10KHz -0.65 dB 20KHz -0...

About digital synthesis, I found this: https://www.analog.com/en/technical-art ... rator.html
Jumping at the conclusion.
They claim: The –120 dBc harmonic distortion figure could be met with a careful design....

I understand the objective is ultra low THD+N. How does this analog solution compares with digital synthesis. _Synthesis using a high performance sound card, focusrite, evaluation boards. _Synthesis re inventing all from scratch: High speed clock, Ram holding Sinus data, high resolution DAC, appropr...

Where have I seen the story of one who had a positive test in a nostril and a negative in the other one ?

I've been able to lower second harmonic distortion by identifying three sources. 1) The VCA. I lowered the input current by 14 dB. It no longer contributes. Is this the VCA from THAT Corp ? Have you figures about the VCA distortions at these low levels. And comments about noise when going to low le...

From my simulation: Average currents over an exact period. WindingA -463.49mA WindingB 463.49mA Center Tap -926.98mA Loads 10 Ohm and 50 Ohm. 1.2301A and 303.13mA Difference -926.98mA _________________________ Edit. Now, with balanced loads WindingA: 0A WindingB: 0A Center Tap: 0A Loads 10 Ohm and 1...

I decided it might be a good idea to point out what I'd found. Yes it is. Your study is far more interesting than efforts I have seen on regulated PSU, aiming at sub microvolt noise, ripple reduction beyond 130 dB and output impedance in micro Ohms. :lol: I'd be curious to find a source that just c...

At the beginning of this discussion, I was confused, then used simulation to figure out what was going on. 4 diodes, 2x 10000uF caps with ESR 0.5 Ohm. As a transformer 2 AC voltage sources, 18V peak with 1 Ohm resistance. Loads 10 Ohm and 50 Ohm. Then all became clear in my mind. I am aware, this tr...

Exactly the waveforms I get with simulations. And no need to insert 1 ohm resistors ;) Actually there is no need for simulations nor measurements to figure that load imbalance induces DC at the CT. The current load difference flows at the ground track at the loads. This current is near pure DC with ...

Interesting studies, I get similar results calculating with LTSpice simulations. I am thinking we have millions of center tap transformers used in line level audio. Negative and positive rails are rarely equally loaded in those equipments. It seems to me, nobody cares, nor has ever seen trouble, is ...