Single-chip RF Power Measurement System MAX2015-made RF Signal Reception Srength Idicator Crcuit

Published:2011/5/16 4:37:00 Author:Sharon | Keyword: Single-chip, RF Power Measurement, Signal Reception Srength Idicator | From:SeekIC

RF signal receiving strength indicator circuit formed by MAX2015 is as shown in the figure. RF signals pass through the coupling capacitor C1 to IN +end and IN-end,then to ground by the coupling capacitor C2. IN +, IN-end internal 50Ω resistor can be matched with the 50MHz ~ 3.0GHz RF circuits. The capacity of C1 and C2 are both 680pF. C3 and C4 are power supply decoupling capacitors. Link OUT and SET-side to each other by short circuit, and MAX2015 will enter the test mode. The output voltage Uo of OUT terminal is sent to the digital voltage meter, showing the received RF signal strength. When power supply is Ucc=+2.7~3.6V, R=0Ω; when Ucc=+4.75~5.25V, R=75Ω( Difference ranging between -1% and +1% is allowable).PWDN is should be linked to ground.



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