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jnewman
Apprentice
United Kingdom
126 Posts |
 Posted - Feb 23 2010 : 1:46:28 PM
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Hi Guys, just need a bit of advice really. As part of a project, I need a simple, but effective amplifier for a speaker (nothing big, probably one of those cheapy cardboard coned ones). Out of our course textbook, there are two circuits suggested. I was wondering if anyone had any idea on which one is better in terms of power output, etc.
The first is a pair of MOSFETs in a feedback loop. After rummaging through our parts trays, we couldn't find any similar/matching N-type and P-type MOSFETS, so I am going to have to order some. Which MOSFETs shall I use? Preferably not that expensive, other parts of the system use TL061s, so sound quality isn't a huge issue. Also, what approx value would that resistor connected to ground be (and why)? I'm really sorry for the awful diagrams
The book recommends I use L272M op-amps, is this OK? Also, what rough value would those 2 resistors be?
Sorry about the length of this, but any help would be much appreciated =D |
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Push-Pull MOSFET based amplifier
