Sunday, March 4, 2018

"LM301" test 2

Offset test ::
(was even "passed" to my surprise ? ** is a good Op Amp after all)

However since it's frequency capabilities set it more to audio range - a random internet bootstrapped Op Amp circuit test ::
((this is actually a good - better than expected - result . . . again! **))


Friday, February 16, 2018

prev. -- follow up

Stage.3 ::

no differential test yet . . . // now is ↓


Update! : 2018.03.04 -- Stage.4 ::

. . . Some clean-up ↓↓

After frequency pass ↓↓

In the old soviet literature it is said to be a good Op Amp ???
. . . for audio frequency operation ... perhaps ???



Thursday, February 15, 2018

Yet a next attempt to make sense of the LM301

tThe experiment . . . adapted from :: National Semiconductor Corporation , SGS-THOMSON Microelectronics , Linear Technology Corporation , . . .

Still performing some 10x 5x worse than the d/s suggests . . .
-- but there is improvement since the prev. TEST

Related parts ::
  1. (LM101)
  2. (LM301A)
  3. (dual LM301)
  4. (LM301)

"Stage 2" ::
(compare → ←) the offset and operation of amplifying cfg. is unreasonably critical to R26 value -- if this is to be "normal" then tuning the real Item to work does not pay off using it instead of LM358 etc. + it's gain seems to vanish fast at higher frequencies (at transient pass even when driven to 10k load ??????) . . . as already said this thing only reacts on control currents R29,-6,10,12,3 -- even if i succeed to match this to d/s ?? will the real thing ever perform that good (not mentioning the wrong/misleading/"of a zero help" schematic diagrams on d/s-s) ... it is better to make your own poor op amp that you know how to tune than keep guessing what this thing suppose to be , how it suppose to perform/work , did it work in a first place (as in a sense of today's op amps)

"Stage 2.a" ::
-- the prev. "Setup" even verifies for 25kHz 12 to 42 V tot supply ???


Monday, January 8, 2018

Regulated single 1.5V AA Led Flaser Concept

there are different 2N3904 models the ones with 100mA I.F and the ones with 150mA I.F -- in REAL implementation of this circuit you may need to multiple parallel these for a switching transistor or use a more powerful low U.CE type one

PS! this is a simulation experiment - the real circuit and components for a similar output parameters may somewhat or significantly differ of those shown in the fig. !!!

about & how we got ↑there↑ ::

initial circuit
the op amp regulation promises worse results than the transistor regulation on the first figure


Saturday, January 6, 2018

Making working/alternate TC4405 model



Better than nothing OR the Microchip's model


Monday, January 1, 2018

Web Buck Remake

src. ::

somehow it did not "work"/simulate too well

experimental/unfinished mod. :: with "pulse skipper" for low loads
/// i have no any idea at this point how one should tune the real circuit into proper operating mode . . .


Thursday, December 28, 2017

www voltage multiplier test

src ::
(i donno why they have to post circuits in the web that add up to the climate warming ...)

mod/fix ::
(the circuit'd do better with true complement wave drive -- e.g. -- a RS digital flop driving two powerful buffers -- in our case -- 555-s)