9 V to 5 V converter LT1175 (CB14616E)

We found this circuit in the 1997 Linear Technology Applications. The components used were common at the time.

Amplifier for Solenoid Drive (CB16093E)
This circuit, suggested by Siemens, allows the activation of 24 V solenoids from TTL LSL signals,...
TLL Linearizer (CB20127E)
In the figure we have the way to linearize the response of a TTL port with the use of a feedback...
High impedance preamplifier (CB20278E)
In the figure we have the original version of an amplifier with high input impedance, 1.2 M ohms....