Friday, October 26, 2018

9V-to-5V Step-down concep design

the thing

switching wave-forms at max.-min. load


Saturday, October 20, 2018

Saturday, October 6, 2018

revised the yy78Lxx 5V variants

tests so far ::
PS! -- although the following setups perform well the real tings may not coz the Spice models use highly accurate fixed current sources - - - while there's no indication the real 78Lxx-s had any implemented //// the last time i tested my real 78Lxx-s showed an ulta poor performance where the voltage started to drop already at !!!above 30-/40 mA drain and significantly differed from the nominal at 50mA (while i didn't notice them getting hot -- so that a possible thermal prot. feature could have had engaged ???)

partial apx. match to d/s ::


Monday, October 1, 2018

Improved the К554СА3 model

some tests ::

PS! : because the low CE voltage drop transistors used i cannot guarantee the device will work down to that it does in simulations but i guess it does significantly below the specified ±13.5V

PS#2 ! : the LM311 model is obviously an over idealized one . . . is just included for the comparison

! Update :: "Unlimited" frequency range oscillator