Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Chip Amps Amplifiers based on integrated circuits

simple integral amplifier
simple integral amplifier
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
Thread Tools Search this Thread
Old 23rd November 2005, 04:48 PM   #1
Dominique is offline Dominique  France
diyAudio Member
Join Date: Jul 2004
Location: Berlin
Default simple integral amplifier


my latest plan is to build a very simple integral amplifier,
using OPA549 (1 or possibly 2 in parallel per channel, I'm not sure yet) with a gain in the range of 2 to 5,
and an OPA2132 for the biggest part of the gain, possibly something like 10? I'm not sure what gain preamp and power amp together should have, maybe 40 or so?

As I'd like to have results soon, I thought about making it a modular design, one pcb for the amp, one for the power supply, of course I need an attenuator! I'll leave some space for an input selector that I'll add sometime soon. A headphone amp would also be nice to add sometime later in the same case.
That way, I could start very quickly and later on, while I'm still learning I could easily replace parts of the amp for comparison and to improve the design.

I imagine that amp to look basically like in the schematic. I'm not sure if I'd better put a resistor from the signal between both amps to ground.
Also, I've seen that the volume pot/attenuator usually sits right at the input. But as that changes input impedance with the volume setting, I wonder if I'd put the attenuator between the OPA2132 and OPA549?
And I've still some homework to do and read about Zobel networks to know if I'd better use this or not.

I'd be very glad for some help!
Attached Images
File Type: gif integral1.gif (4.5 KB, 232 views)
  Reply With Quote


simple integral amplifierHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

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
simple Amplifier? technics Solid State 38 31st March 2008 11:36 PM
Simple amplifier hobbit Solid State 15 27th January 2008 06:30 AM
simple amplifier bigspeakers Chip Amps 4 23rd June 2006 12:34 PM
simple amplifier east electronics Solid State 12 26th January 2006 11:18 PM
The Integral Transference Project EchoWars Everything Else 16 27th November 2004 10:50 AM

New To Site? Need Help?

All times are GMT. The time now is 01:07 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio