DTMF Decoder (CB25048E)

This circuit was found in the 1987 Radio Electronics magazine. The components used are integrated circuits of the time.

| Clique na imagem para ampliar |

10 kHz Low Pass Filter (CB14133E)
The circuit shown is suggested by National Semiconductor in its 1994 Linear Applications Handbook. We...
Simple AM radio ZN416E (CB8203E)
The ZN416E integrated circuit is uncommon today. It consists of a complete radio, like the one...
Voltage Reference with the LMV321 (CB4744E)
In the figure we show how to implement a voltage reference with the ON Semiconductor rail-to-rail...