Flat response amplifier CIR16474S CB9390E (CB9390E)

This circuit was found in a 1970s documentation. The integrated circuit used is uncommon today.

Modulated Siren 555 (CB13190E)
We found this circuit in an American publication from the 1970s. The MC1555 is the version of the...
Common gate stage (CB7470E)
This circuit for FET was obtained from a 1977 Radio Handbook. The input impedance is 150 ohm. The...
Ultrasonic Alarm Receiver (CB13979E)
This is the receiver circuit for the CB13978B, found in the same 1977 Elettronica Prática...