Ordinary low-noise broadband amplifier circuit diagram

Published:2011/8/2 2:40:00 Author:Rebekka | Keyword: Ordinary low-noise, broadband amplifier | From:SeekIC

The gain bandwidth of some integrated amplifier is small (about l ~ 2 MHz), the input noise is high and the conversion rate is low pressure (about 0.5 V/u s). The reason why the gain bandwidth is small is that the operational amplifier internal input class level shift from the transistor phase shift. Conversion rate is low, because the input stage emitter current is too small. Figure (a) shows the low noise amplifier broadband circuit composed of the application ordinary op-amp integrated chips OPA101. The circuit can increase the convert rate to 30 times, and its gain bandwidth can be close to l00MHz.



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