Switched inductorless DC→DC converter TEST

the TEST trg./src.at (fig.1) got my interest by it's switching capacitor name values (1µF) v. V.OUT parameters -- I.max = 50mA U.TOT = 30V . . .

. . . the simulation showed that the transistors at the same "shoulder" are OPEN @ the same (short) time + the generator wave forms were somewhat not that you'd expect

(i guess presented in the ® order ) the figures show the improvement/TEST steps - to meet proposed OUTPUT parameters to this 9V : 30V converter

note : the peak currents approach 1A range - the averages - are the way over the specs of the 1-s of the initally shown* transistors (in test the 2N3906*,-04* was used to get the oscillations started) /!\ -- you likely can't build any of the shown grids ( using these* transistors ) that would survive the switch ON + further more (i suppose) using the 6LF22 / 6LR61 or alternate won't meet the power demand of "this" converter the 6x AA / LR6 or better is more realistic

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Figures ::

• Fig.1 :: the ® - a lot of question marks
• Fig.2 :: 68% OUT_AVG 28V 51mA IN_AVG 8.4V 250mA
• Fig.3 :: 64% OUT_AVG 25V 44mA IN_AVG 8.5V 200mA
• Fig.4 :: 74% OUT_AVG 29V 51mA IN_AVG 8.4V 230mA
• Fig.5 :: 79% OUT_AVG 35V 63mA IN_AVG 8.3V 340mA
• Fig.6 :: 74% OUT_AVG 38V 43mA IN_AVG 8.4V 260mA

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Fig.1	Fig.2	Fig.3
Fig.4	Fig.5	Fig.6

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