Found in an American 1980s documentation, this circuit compares signals from two TTL sources, providing an output that depends on the frequency difference. The circuit can be used as a shield.
This circuit is ideal for the design of interfaces and shields, as it allows total isolation of...
Found in a 1968 EEE, this circuit accepts frequencies from 1 to 1000 Hz and control voltages from 0.1 to...
Found in a 1970 EEE this circuit emulates a zener diode whose voltage can be set to R2. Power...