HIGH_Z_CRO_PREAMP

Published:2009/7/10 22:39:00 Author:May | From:SeekIC

Darlington circuit provides extremely high input impedance (over 2.2 megohms). With input shorted, noise level is 78 dB down as read at output whh VTVM. Linearity is within 1.5% for inputs from 100 μV to 1 mV, and frequency response is ±2 dB from 100 Hz to 350 kHz. Originally designed to boost input to CRO, but can be adapted to many other applications requiring high gain, low noise, and high input impedance.-J. Fisk, Circuits and Techniques, Ham Radio, June 1976, p 48-52.



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