This automotive circuit was obtained from an 80's schematic from the integrated circuit factory itself. The voltage regulator is still common, but the operational amplifier is of the time.
This 4.5 MHz amplifier is suitable for analog TV applications. We found it in a 1967 Philips...
This ultra-low noise amplifier and simple power supply was found in Analog Devices documentation from the...
Found in an RF Design from the 90's this circuit is intended for crystals of less than 1 MHz....