This circuit from the 90s, found in an Electronic Engineering can be used as a shield since its control is digital with TTL logic of 5 V. The components used are still common today.
This circuit uses a Norton operational amplifier to generate 1 kHz pulses with a 1 to 60...
The figure shows how to use a CMOS amplifier as a crystal-controlled oscillator. The circuit is...
The purpose of the circuit shown in the figure, obtained from a 1972 documentation, is to delay the...