RF signal receiving strength indicator circuit composed of the MAX2015

Published:2011/7/6 2:34:00 Author:Christina | Keyword: RF signal, receiving, strength, indicator | From:SeekIC

The RF signal receiving strength indicator circuit which is composed of the MAX2015 is as shown in the figure. The RF signal is connected with the IN+ port through the coupling capacitance C1, the IN- port is connected with the ground through the coupling capacitance C2. The internal 50Ω resistances of the IN+ and IN- ports can be matched with the 50MHz～3.0GHz RF circuit. The capacities of C1 and C2 are 680 pF. The C3 and C4 are the power-supply decoupling capacitance. If you short connect the OUT port with the SET port, the MAX2015 will be in the detection mode. The output voltage Vo of the OUT port adds to the digital voltmeter to display the strength of the receiving RF signal.



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