We find this circuit in American documentation from the 1980s. It consists of a frequency folder using a varicap. The capacitors and coils depend on the frequency of operation.
Vishay's VCNL4200 integrated circuit consists of a fully integrated proximity detector containing...
We find this circuit in a 1976 NASA handbook. The circuit can be designed based on current logical...
This circuit indicates the logic level of a digital signal. LEDs can replace the lamp, wired with...