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Normally, for signal generators, what is the class type for the amplifier?

Question asked by wangyiliu99 on Jun 16, 2013
Latest reply on Jun 18, 2013 by wangyiliu99
Hi, all

please forgive me for my ignorance in SG. or maybe I made the confusion with SG and PA. 

My question is:
for the signal generator, what class type amplifer is usually used?

Is it usually class A? 

Further, normally, is the automatic leveling control (ALC) circuit included in the SG?