diyAudio - Entries for March 15, 2013
Go Back   Home > Forums > Blogs
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Old

X-reg voltage stabilizer LTSPICE file

Posted 15th March 2013 at 01:54 AM by rjm (RJM Audio Blog)
Updated 20th March 2013 at 01:47 AM by rjm

I did up the X-reg circuit in LTSpice.

Results shown below, together with the LTSpice .asc file you can use to play around with this yourself.

First attached image shows FFT for the rectified DC (green), reference voltage (red) and X-reg output (blue) for the designed-for 10 mA output (top) and a more punishing 100 mA (bottom).

Second image shows an LTSpice screengrab for the LT1086 with bypassed adj pin under comparable loading. Input voltage in blue, output in green. This is a reasonable approximation of a "good" IC regulator.

Last image shows a plot of the exported LTSpice FFT data for the X-reg and the LT1086-12V (Cin 1000uF, Cout 100uF) both at nominal currents of 10 mA. The LT1086-12V is a reasonable substitute for a generic LM7812, i.e. a "bad" IC regulator.

A typical op amp will have sufficient PSRR to mop of the residual noise from the bypassed LT1086. The fixed LT1086-12V, on the...
Attached Thumbnails
Click image for larger version

Name:	xreg 01.png
Views:	6207
Size:	104.8 KB
ID:	910   Click image for larger version

Name:	LT1086.png
Views:	1699
Size:	56.0 KB
ID:	912   Click image for larger version

Name:	Regulator Comparison.png
Views:	843
Size:	50.4 KB
ID:	914  
Attached Files
File Type: zip xreg 01.zip (1.9 KB, 209 views)
rjm's Avatar
rjm
diyAudio Member
Views 3462 Comments 2 rjm is offline
Hide this!Advertise here!

New To Site? Need Help?

All times are GMT. The time now is 01:54 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd.
Copyright 1999-2016 diyAudio

Content Relevant URLs by vBSEO 3.3.2
Wiki