schematic variation and sim results of Pass "X" series US pat 5376899

[tiefbassuebertr]

Four unbal. power amp bal versions based of Pass "X" (SuSy) with sim. results (Fig. 3 from US patent 5376899) continued
C: Pass X bal Fig3 Var III
Gain=10x: 40=20R 36/37=11K3 Open-Loop Gain: 83x In/out 1V/10Vss
1) schematic for Damping factor test
2) AC-Analysis (damping factor over frequency)
3) AC Analysis (normally frequency response)
4) Fourier Analysis lin 10 KHz (THD) K3: 1,65mV
5) Fourier Analysis log 10 KHz (THD)
6) Fourier Analysis lin 100 KHz (THD) (K3: 16mV)
7) Fourier Analysis log 100 KHz (THD)
8) Fourier Analysis log 19/20 KHz (IM)
9) Transient Analysis 1MHz
10) schematic

[tiefbassuebertr]

Pass X Var I (unbal) versus X Var V bal (only THD, 10KHz + 100KHz) US patent 5376899
Gain=10x In/out 1V/10Vss

A: Pass X-Var I.unbal Fig3 THD 10 100KHz.pdf
1) THD 10KHz
2) Schematic
3) THD 100KHz

[tiefbassuebertr]

Pass X Var I (unbal) versus X Var V bal (only THD, 10KHz + 100KHz) US patent 5376899
Gain=10x In/out 1V/10Vss - continued

B. Pass X Var V bal Fig.3 THD 10 100KHz-.pdf (40 = 10R, Open Loop Gain = 125)
1) THD 10KHz
2) Schematic
3) THD 100KHz

good to observe is the THD compensation effect by balanced version, even by 100 KHz. Only third harmonic there are, that means at same time, there are no unwanted 1KHz signal by IM measuring by 19+20 KHz

At next I will investigate the complementary-symmetry (push-pull) version of Fig. 4 from US patent 5376899 both unbal and bal. versions
Let's see, whether it is possible to get a design based to this and to the CSPP topology (circlotron) with even more reduction of distortion.

[stinius]

Originally posted by Nelson Pass
Play nice, you boys.

Don't make me come over there.

Nelson
You are welcome to come over here anytime you like, do some salmon and trout fishing and walking in the mountains, maybe some deer hunting.

Bring JC as well, it wouldn’t harm him if he rested his eyes on something else than the scope.

Cheers