Voltage doubler for EEPROM programmer (CB9323E)

This circuit from the 90s, was found in an Electronic Design of the time. The components used are uncommon today.

Temperature to frequency converter (CB7325E)
This circuit was obtained in a Radio Electronics of the 90s. The circuit uses an integrated circuit...
Silencer (CB4197E)
This squelch is activated by its own noise, acting automatically. It is used in communications...
Active antenna using IC (CB8924E)
In this circuit of the 1980s, the T1 transformer has 30 turns of 28 primary wire and the secondary...