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Cap loaded

Here are some interesting results for the MLJ3281 Sizklai follower
with compensation and with a .1uF capacitor across a 10 ohm load.

3900pF capacitor inserted between collector and base of first
transistor. Square Wave = 1050 Hz.
Using 1,3,5,...25,27 harmonic values only.
27th = 28350Hz. Amptitude = 8v peak.
Gibbs phenomena (although present)was very small.
Sine Wave = 5KHz. Amptitude = 1v peak.

B+ = +-20v, ILoad = 1.9477 amps, RLoad = 10 ohms/.1uF
Vbase = 14.6mv.

Simulation settings: Step = 100nS, Window = .1second

Compensated with .1uF load cap,Driven sine/square wave measure output(1stcolumn)
Uncompensated no .1uF load cap,Driven sine/square wave measure output(2ndcolumn)

The noise floor on input was about .3nV which represents a
very low noise level.

Here are the results:

Fndmntl(dB) 0.00 0.00
2nd -57.06 -57.10
3rd -61.39 -61.44
4th -71.10 -71.42
5th -80.66 -81.13
6th -79.13 -79.20
7th -88.88 -91.51
8th -86.56 -87.47
9th -90.93 -90.89
10th -93.98 -100.22
11th -97.74 -96.35
12th -92.44 -91.89
13th -90.10 -99.84

Interesting that the compensated (3900pF) with .1uF cap across a
10 ohm load (first set of numbers) looks very similiar to the
uncompensated (no cap, and no cap across load) case.

The non-linearities do not go away.



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