This circuit is a driver for R-2R network of AD converters. We found it in manufacturer documentation from the 1980s. The configuration can be adapted to be used with modern operationals.
We found this oscillator in a documentation for radio amateurs from the 1970s. The circuit can use...
Many oscilloscopes have high impedance inputs that make it difficult to observe high frequency signals...
This is the receiver for the previous circuit we found in the December 1992 Radio Electronics...