Direct_coupled_wideband_log_amplifier

Published:2009/7/22 6:38:00 Author:Jessie | From:SeekIC

The SL521 shown in this figure is intended primarily for use in successive-detection log IF strips, operating at center frequencies between 10 and 100 MHz. The SL521 is suitable for direct-coupling, and includes a built-in 500-pF supply-decoupling capacitor. Typical stage voltage-gain is 10 to 12 dB. The RF output is taken from pin 4, and the detected output is taken from pin 3. When more than two untuned stages are used, additional decoupling might be required. The values for decoupling capacitors with untuned cascades are: 3 stages 1 nF, 4 stages 3 nF, 5 stages 10 nF, 6 or more stages 30 nF.



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