This circuit was found in a Popular Electronics documentation from the 90s. It is possible to switch the frequency of an oscillator by voltage. The circuit can act as a shield.
The integrated circuits used in this oscillator are not very common today, as we obtained it in...
This circuit is suitable for applications in medical, research and industrial equipment. The...
This amplifier with the LM1098 and LM101 by Motorola from a 1990 manual can be designed with more...