Logic level converter (CB7250E)

Found in an Electronic Design of 1965, this circuit consists of NOR gates and can be used in astable and monostable multivibrators.

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Manual Heater Control (CB21276E)
Found in an Electronic Design from the 90's, this circuit uses an SCR according to the controlled power....
High Q Crystal Filter (CB19698E)
For the 1 MHz frequency, the pass band of this filter is only 120 Hz wide. The filter is suitable for...
Magnetic field sensor (CB22344E)
We found this circuit in an English publication from 1995. The Hall sensor used is a component of the...