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20_MHz_video_log_amplifier

2016-09-12 06:40  
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20_MHz_video_log_amplifier
This circuit shows a 2920 in the basic log-amplifier configurations, using a minimum of external components. The offset pot between pins 9 and 10 is mandatory. Vcc is typically±15 V, C2 is typically between 10 and 50 pF. The circuit has a 20-MHz bandwidth and an 80-dB dynamic range.