Video switch (CB8740E)

This circuit for analog video signals was found in a 90s 303 Circuits. The used digital switch is a component still common today.

| Clique na imagem para ampliar |

1 Hz standard (CB15785E)
The circuit shown in the figure generates signals of 6 Hz and 1 Hz, which can be used in...
Word Pre-Modulation Processor (CB20016E)
This circuit processes the audio signal that corresponds to a word to make it more appropriate to modulate a...
Automatic Frequency Control (CB4101E)
We found this circuit in an old documentation for hams. In it we have the way to use a varicap to...