Showing posts with label AN1393. Show all posts
Showing posts with label AN1393. Show all posts

Saturday, February 23, 2019

revised my LM393 CLM-s

using two types of test ::



about ::




[Eop]

Tuesday, September 18, 2018

Improving LM339 + "tunable" osc variant

► the tunable osc. as by selecting the RC net-wk


► the tests that lead to (as by what i've tested so far) "improved" v. of LMx93


► 2MHz - TEST (driven from realistic src. 74HC04 -- 1 gate has just about the power required!?)



[Eop]

Friday, August 25, 2017

LMxx39 Circus + 750ns & - 900ns Zero Cross

Circus


Ti provided Pspice thingy for LM339 (is annoyingly ▲impractical▲) + (some of the chip names might be erroneous) -- anyway a good question here is why that cfg. doesn't generate "timestep too small" error . . .



Ti LM339 behavioural model as the bottom plot -- interestingly -- the closest match to prev. does not appear to be the right transistor circuit - the LM239 - but instead my experimental design as LMx39 (respectively LM293 and LMx93 in simulation circuit - both are the component level models e.g. the sub circuits) . . .


Cross the Zero +700ns


making the src. (whitch is yet another variant of the Lim.- or the Window comparator) more practical

Cross the Zero -900ns

using the "slope detector" - the right - first occurring comp.-pair signal can be passed to outp (removes the "echo")

[Eop]

Friday, December 16, 2016

LMx39 CLM Test

since the Philips didn't provided the internals we assume it's about LMx39 ! ???


Capabilities . . . ! Optimistic . . .


The next requires a fixed supply , no aging / temperature drift of the components (or very complex / fast auto adjust to . . .)



[Eop]