RF_METER

Published:2009/7/16 2:24:00 Author:Jessie | From:SeekIC

Simple square-law detector can detect and measure signals as low as -26 dBm, at microwatt levels. CR1 is biased with about 20 μA by opampU1 serving as low-impedance DC source. CR2 provides temperature compensation, and U2 serves as low-impedance reference for 10-mA meter. Diodes can be hot-carrier types or 1N914s.-W. Hayward, Defining and Measuring Receiver Dynamic Range, QST, July 1975, p 15-21 and 43.



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