as it was modified :
[EoP]
[EoP]
Showing posts with label low power. Show all posts
Showing posts with label low power. Show all posts
Sunday, April 26, 2020
Friday, September 13, 2019
the 2-nd compile of the "Low Power Pulse Generator"
trivial warm-up test
a high power (an inefficient pulse generator)
a low power (an efficient pulse generator)
. . . optimizing for wider range of R4
. . . optimizing for component count
[Eop]
a high power (an inefficient pulse generator)
a low power (an efficient pulse generator)
. . . optimizing for wider range of R4
. . . optimizing for component count
[Eop]
Thursday, March 17, 2016
Custom eXperimental 0.6 ... 1.6 V inverter
From back to forth --
32k768 Qz Driver ::
the interesting thing about this X-tal pusher is that the 1 single inverter most likely has a sufficient gain and speed to manage the task (if it's already oscillating) but using uneven no. of gates (1,3 were tested) and increasing the +feedback the oscillations start ubruptly at 100x to 300x higher fq. than the one of the quartz -- otherwise the quartz won't get into phase lock with feedback and thus won't collect the energy for start up ???
-- however the shown - an even no. of gates - v. has quite flexible tuning range where everywhere the oscillations do start e.g. the quartz gets phase locked with feedback and starts storing the energy . . . this is the first time i encounter such . . . curious ?
AA(AAA) behavior/capabilities ::
. . . simple things are complex to design ::
[Eop]
32k768 Qz Driver ::
the interesting thing about this X-tal pusher is that the 1 single inverter most likely has a sufficient gain and speed to manage the task (if it's already oscillating) but using uneven no. of gates (1,3 were tested) and increasing the +feedback the oscillations start ubruptly at 100x to 300x higher fq. than the one of the quartz -- otherwise the quartz won't get into phase lock with feedback and thus won't collect the energy for start up ???
-- however the shown - an even no. of gates - v. has quite flexible tuning range where everywhere the oscillations do start e.g. the quartz gets phase locked with feedback and starts storing the energy . . . this is the first time i encounter such . . . curious ?
AA(AAA) behavior/capabilities ::
. . . simple things are complex to design ::
[Eop]
Saturday, December 26, 2015
yet another LDO 5V regulator
the Regulator :: /̲!̲\̲ this thing seems to perform better than LE50A (STMicroelectronics) , LM78L05ACM (National Semiconductor Corporation) , MC78L05AC (Motorola, Inc.) /̲!̲\̲ when powered by 9V 6LR61 alkaline -- in a sense of IOUT/ΔUOUT . . . . . . . . . history of :: the goal : steady supply for OpAmps powered from Lo-Power battery ►► everything is good as long as you have to implement the current limit . . . so this one has 1 unintentionally "built in" (adjustable by transistor-switch current source) ::
!note :: altough theLE50 is labelled as "Very Low Drop" it actually performs worse than 1 of those 78L05-s and the all three b_a_r_e_l_y manage the 150Ω load with reasonable output (4.8 dn2 4.7V) . . .
. . . when the brought regulator does 100Ω with about 10mV output-drop and acts similar to above 3 at about 26Ω with 175mV drop e.g. 4.83V output -- though /̲!̲\̲ it does not have thermal protection and it's current limiting is poorly studied /̲!̲\̲
[Eop]
the actual transistor used for switch is ancient 2SD1252A (Panasonic)the custom zeners are random Red-LED + Д9К (apx. 2V + 320mV drop) other BJT-s are 2N3906(-04) but you can use a better ones such as fixed beta 2SA1015 , 2SC1815 ...
!note :: altough theLE50 is labelled as "Very Low Drop" it actually performs worse than 1 of those 78L05-s and the all three b_a_r_e_l_y manage the 150Ω load with reasonable output (4.8 dn2 4.7V) . . .
. . . when the brought regulator does 100Ω with about 10mV output-drop and acts similar to above 3 at about 26Ω with 175mV drop e.g. 4.83V output -- though /̲!̲\̲ it does not have thermal protection and it's current limiting is poorly studied /̲!̲\̲
[Eop]