Crystal converter (CB7327E)

This circuit was found in a Popular Electronics from the 90's. The circuit can be used to convert signals to frequencies up to 25 MHz.

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CB15908E Photodiode Amplifier (CB15908E)
This circuit is suggested by National Semiconductor and has an excellent gain, for a photodiode as a...
Incandescent Light Effect (CB11374E)
With the circuit shown, when the brightness of one lamp decreases, that of the other increases. There is...
Differential thermometer (CB9489E)
We found this circuit in an Intersil documentation. Temperature sensors are special components of the time,...