|Chip Amps Amplifiers based on integrated circuits|
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|
|20th January 2007, 10:30 PM||#3|
Join Date: Jul 2004
Location: Scottish Borders
How have you assembled your chipamp?
inverting, non-inverting, DC block on NFB, DC block on input, Zin, NFB resistor values,
All the above will affect the DC output offset and they interact with what source impedance/resistance the amplifier input sees.
If you want to use a passive attenuator then Zin>=5times the attenuator resistance.
attenuator resistance >=5times the source resistance.
5times is the minimum, but 10times is better.
A disadvantage of using high attenuator resistance is loss of treble from the amplifier. Careful selection of component values can avoid many of the problems.
regards Andrew T.
|Thread Tools||Search this Thread|
|Thread||Thread Starter||Forum||Replies||Last Post|
|Volume control on DVD player remote. Lose resolution at low volume?||Circlotron||Digital Source||2||10th June 2011 08:20 PM|
|Volume control for lm3875 amp||Arx||Chip Amps||10||23rd September 2007 10:25 PM|
|lm3875 inverted layout with 100k pot, not enough volume?||rocktboy||Chip Amps||11||12th January 2006 06:44 PM|
|LM3875 into 4 Ohm||audioPT||Chip Amps||12||7th July 2005 01:14 AM|
|LM3875 amp||Tekko||Chip Amps||2||20th January 2005 05:32 PM|
|New To Site?||Need Help?|