heloo, need help. i have designed the circuit for mobile signal detector and otput i m getting is rapidly changing to 2.5, 2.6, 2.9, 3.5, 3.4, 1.4,5.7, 1.9, 0.0, 1.5 3.7 , 5.8, 6.2, 7.5 etc. but need a constant dc voltage value more than 3 volt for giving as input for microcontroller. Can anyone pls suggest me any idea or circuit to convert that varing signal to dc value!! THANKS IN ADVANCE!!!!