This circuit for equipment adjustment and diagnostics was found in a Mullard transistors manual from 1960. Information about the transformers is given with the diagram.
The purpose of this circuit is to prevent TTL circuits from receiving a voltage greater than 5 V...
The integrated circuit used in this application is the Texas Instruments LMV358A, a low voltage...
This circuit was found in a Popular Electronics from the 90s. The frequency is given by R2 and C1....