This circuit aims to increase the selectivity of receivers whose FI is 455 kHz. The circuit is from 1975 documentation. The transistors can be the modern BF494 equivalents.
This circuit uses an unusual component today which is the integrated circuit. We found this...
This circuit was found in an old American documentation. The operational used is of the...
In figure 1 we have an application for NLAS5113, a new device from On Semiconductor...