MC-1590 IF amplifier circuit

Published:2011/6/17 10:40:00 Author:John | Keyword: IF amplifier | From:SeekIC

The picture shows the amplifier based on chips 1490 and 1590. The circuit can work well in the VHF region (30 ~ 80MHz). Input signal can be coupled to the IC through the capacitor C1. Tuning performance can be achieved by the parallel resonant circuit formed by C2 and L1. Capacitor C3 can apply the not used differential input end of chip 1590 to be AC grounded. The output tuning reflects the differential output characteristics of chip 1590. As for LC tuned circuit, a parallel resonant circuit formed by the T1’s primary coil and capacitor C6 is connected between pin 5 and pin 6.



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