Transformerless_microphone_preamplifier_with_low_noise_inputs

Published:2009/7/23 21:13:00 Author:Jessie | From:SeekIC

This circuit is similar to that of Fig. 1-47, except that two LM394s are used as input devices for the LM833 gain stages. The equivalent input noise of the Fig. 1-48 circuit is about 340 nV over a 20-Hz to 20-kHz band (-129 dB referred to 1V).



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