We found this circuit in an American publication from 1977. The circuit drives two LEDs according to the control of the inputs. The technology is TTL requiring 5 V to power supply.
This is a traditional audio amplifier configuration with complementary Darlington transistors. The power...
Found in 1967 General Electric documentation, this circuit is intended for the control of...
In the figure we show a configuration for a crystal controlled overtone oscillator using a...