6SN7 Preamplifier (T1105E)

This preamp circuit has a typical configuration as found in a 1946 publication. Supply voltages are indicated.

Current limiter (CB12807E)
This circuit was obtained in a Texas Instruments 2012 documentation, which consists of a current...
Phase separator (CB8142E)
This circuit was found in a 1964 Electronic Design. It generates opposite phase signals from an...
TTL Logic Probe (CB5913E)
This circuit uses a 7-segment display to indicate the logic level of a test circuit. The power...