This circuit with 10 MHz and 1.25 MHz TTL outputs was found in an American documentation from the 1980s. The used integrated circuit is uncommon today.
This circuit is from an application manual for linear instruments from Texas Instruments. The...
This circuit from a Japanese publication in 1968 uses germanium transistors from the time like the...
The presented circuit uses a window comparator to keep a relay activated only when the sensor is...