Saturday, February 23, 2019

revised my LM393 CLM-s

using two types of test ::

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Friday, February 22, 2019

32kHz X-tal osc -- new variants

12µA Bjt v. ::

2µA j-Fet v. ::

see also an old C-MOS inverter variant :


Friday, February 15, 2019

Q.C. the DAC7822 concept

the non-neg. (bi-polar) multiplication wiring gave the better performance in the sense of speed


Tuesday, February 5, 2019

LM710 from d/s

the previous attempt to make it work (just by principal schematic) failed ... from d/s the magical hFE seems to be 11 . . . ??? (as it's the same timer as 54x00 74x00 series -- the gained information may be practical in getting these models to work with the d/s specified resistances . . .)

my input sensitivity is a bit poorer than the К554СА2 documentation specifies , but basically it will do

note :: even if it takes dual supply and more power than new comparators - then it usually is up to 10 times cheaper for experimental circuits - and someone still may have a storefull of them . . .

the hFE is not matching the 74x00 series

the pages 7,8 have a scope diagram for comparator compared to TTL inverter ::

Reproduced experiment ??? ::


random Op Amp Gain adjustment method (slow -- not optimal delay)

i thought it was easy* but (i usually don't compute things unless i have to) when i wrote up a formula it turned out not as such

anyways seems to work without major problems from gain 2 to 8

note* :: that the GA would equal 1+1/gain (as infact it's GA = 1 1 - 2 Gain )

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