Go Back   Home > Forums > >

Analogue Source Turntables, Tonearms, Cartridges, Phono Stages, Tuners, Tape Recorders, etc.

AC motor drive from single-ended supply
AC motor drive from single-ended supply
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
Reply
 
Thread Tools
Old 26th February 2021, 11:05 PM   #11
PRR is offline PRR  United States
diyAudio Member
 
PRR's Avatar
 
Join Date: Jun 2003
Location: Maine USA
AC motor drive from single-ended supply
Quote:
Originally Posted by Airprodigy View Post
...However a quadrature oscillator requires 3 RC segments whereas this only appears to have 2 ....
I agree. 2 can work only at infinity. In practice two obvious poles won't sing, but one more much higher pole will bring it to the sing point, but with poor control of frequency.

The Quadrature Oscillator

https://backend.orbit.dtu.dk/ws/port...P-F4-9047p.pdf

It is always possible the drawing is incomplete. Or that the amplitude control (Zener thing) hides a pole.
  Reply With Quote
Old 27th February 2021, 11:42 AM   #12
msdin is offline msdin  United Kingdom
diyAudio Member
 
Join Date: Sep 2006
Quote:
Originally Posted by Airprodigy View Post
I realise the circuit contains an RC oscillator . However I am a bit puzzled - it seems to most closely resemble a quadrature oscillator using the two top left op amps. However a quadrature oscillator requires 3 RC segments whereas this only appears to have 2 ( consisting of the 1% toleranced caps and resistors, I assume). I'm obviously missing something here!
Sorry my mistake.
I've notice the TD320 circuit is different to the Phonosophie.

The TD320 oscillator is more like a State Variable Filter Oscillator.

ESP - Sinewaves
  Reply to this post

Reply


AC motor drive from single-ended supplyHide this!Advertise here!
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
"Balanced" vs single ended headphone drive chris719 Headphone Systems 11 14th September 2012 06:45 PM
Lambda motor vs. XBL^2 motor vs. any other motor Thinkcat Subwoofers 16 23rd December 2008 06:23 AM
Single Ended, Single driver: In-room distortion measurements Gerrit Boers Full Range 4 27th November 2007 08:12 AM
Anyone play with the Zen Single-Stage Single-Ended Class A? Rino odorico Pass Labs 13 29th August 2002 09:01 AM


New To Site? Need Help?

All times are GMT. The time now is 04:38 AM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.00%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Copyright ©1999-2021 diyAudio
Wiki