vivkr
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Hi Aaron,
I would use some kind of a class-AB topology. There are several out there, some using 2 stages + an AB, some purely AB. If you do not need very large gain and noise is not very critical, try out: "Lopez-Martin et al" from JSSC, May 2005. Of course, there are several other possible solutions in AB, all very good. I just know these ones because I was playing around with them and was able to make these very simply. They also don't need any overhead circuitry. If you look carefully, you will find ways to reduce the power consumption even further, particularly with Topology # 1 in this paper where 2 branches are redundant. Just search around for more if you like.
I would keep it simple.
Regards Vivek
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