This circuit operates from 20 Hz to over 20 kHz and is easily tunable. We found it in a 70s documentation. The circuit can be implemented with modern operational amplifiers.
This circuit was obtained from a 1966 General Electric manual. The circuit applies only to...
Author: Newton C. Braga Published:July 8, 2016 Formato:Book and e-Book Pages:...
We found this portable transmitter that reaches up to 200 meters in a Japanese publication from...