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Nicholas Gray's Blog

March 2010 Previous month

High Gain Circuits

Posted by nickgray Mar 5, 2010
High gain circuits generally require multiple stages of precision amplifiers. However, lower precision components can often be used if provision is made for adjusting offsets and sometimes adjusting gain. Injecting a little current into an input node of an amplifier can be quite effective in correcting for a large offset voltage. The real problem with a large offset voltage is that it is nearly always accompanied with a large temperature coefficient of offset, meaning the offset voltage can chan ...