This circuit was found in a 1970 IEEE publication. The circuit functions as a voltage controlled variable resistor and can be used with audio signals. Transistors admit current equivalents.
This linear bargraph circuit was found in the February 1992 issue of Radio Electronics magazine. The 10...
November 2016 - NXP ARM Cortex microcontrollers for serial interfacing applications, NXP 32-bit...
Used by the police this receiver tuned to the low VHF band. The circuit is from a documentation from the...