electro-music.com   Dedicated to experimental electro-acoustic
and electronic music 		 
    Front Page  |  Radio
 |  Media  |  Forum  |  Wiki  |  Links
Forum with support of Syndicator RSS
 FAQFAQ   CalendarCalendar   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   LinksLinks
 RegisterRegister   ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in  Chat RoomChat Room 

 Forum index » DIY Hardware and Software » YuSynth
VCO US-1 stability
Post new topic   Reply to topic Moderators: Scott Stites
Page 1 of 1 [4 Posts]		 View unread posts
View new posts in the last week
Mark the topic unread :: View previous topic :: View next topic
Author Message
smorkun



Joined: Sep 01, 2013
Posts: 3
Location: russian
PostPosted: Sun Jun 14, 2015 9:22 am    Post subject: VCO US-1 stability
Subject description: stability		 Reply with quote  Mark this post and the followings unread
Good day. I am looking for a simple and stable exponential VCO without thermistors. Interested US-1 VCO. Tell me what his real parameter of stability in practice? With hand matched transistors BC557?
Back to top
View user's profile Send private message
yusynth



Joined: Nov 24, 2005
Posts: 1314
Location: France
PostPosted: Mon Jun 22, 2015 1:16 am    Post subject: Reply with quote  Mark this post and the followings unread
To be avoided.
_________________
Yves
Back to top
View user's profile Send private message Visit poster's website
smorkun



Joined: Sep 01, 2013
Posts: 3
Location: russian
PostPosted: Mon Jun 22, 2015 2:27 am    Post subject: Reply with quote  Mark this post and the followings unread
yusynth wrote:
To be avoided.

What does it mean?
I think to improve the scheme and to put BC857BS. Zener replaced by TL431. Operational amplifiers deliver LT1056. I think stability should be good, even if it was originally bad . What do you think about this?
Back to top
View user's profile Send private message
yusynth



Joined: Nov 24, 2005
Posts: 1314
Location: France
PostPosted: Wed Jul 15, 2015 4:29 am    Post subject: Reply with quote  Mark this post and the followings unread
To be avoided because the compensation scheme of this circuit is additive while it should be multiplicative. Don't expect a good a good temperature compensation.
_________________
Yves
Back to top
View user's profile Send private message Visit poster's website
Display posts from previous:   
Post new topic   Reply to topic Moderators: Scott Stites
Page 1 of 1 [4 Posts]		 View unread posts
View new posts in the last week
Mark the topic unread :: View previous topic :: View next topic
 Forum index » DIY Hardware and Software » YuSynth
Jump to:  

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


Forum with support of Syndicator RSS
Powered by phpBB © 2001, 2005 phpBB Group
Copyright © 2003 through 2009 by electro-music.com - Conditions Of Use