Found in Ferranti's 1969 documentation, this circuit can be mounted with a modern equivalent transistor. The circuit has a 4 V immunity and can be used as a shield for sensors.
This circuit was found in a Popular Electronics of the 90s. The operational amplifier admits...
This is the typical circuit of a local oscillator for a superheterodyne FM receiver. The circuit...
Found in a 1968 Motorola publication, this circuit generates a high-powered audio tone when...