This circuit simulates a resistor controlled by digital signals. We found it in American documentation from the 90s. The basic component is a CMOS 4016 or 4066 digital switch.
This circuit was found in an American 1980s documentation. Transistors can be commonly used for...
This circuit generates clear signals in harmonics that can be used for testing mid-wave radios. The...
This configuration found in other companies' manuals is from Motorola's 1993 Linear Interface ICs....