This circuit is from Delco Radio found in a 1968’s documentation. The transistors are of the time and are not given information about the driver transformer. Note the high supply voltage.
This circuit was found in an old American documentation. The integrated circuit used is uncommon...
This circuit was obtained from a 90s Radio Electronics. The value of R1 determines the scale...
We found this circuit in the 2005 Linear Technology component manual. The circuit can be used as a...