Buffer for AD converters (CB9318E)

This circuit was obtained from Linear Technology documentation from the 90's. The circuit uses company components.

Two frequency oscillator (CB8059E)
Found elsewhere in this section, but from other sources, this circuit is from a 1964 Electronic...
Active antenna (CB6771E)
This circuit for medium and short wave range was found in an American documentation from 1992. The...
Transformer less power supply (CB8896E)
The output voltages of this power source are selected by a switch according to the capacitors. The...