the BJT TTL inverter will be predicted using SPICE. Use a Q2N3904 for all of the transistors, and a D1N4002 for the diode. Add VCC and ground. Connect the output to the load.
Use a load of 90pF. For this circuit, find:
• r
• f
• PLH
• PHL
• f max
• NMhigh
• NMlow
• Power used DC
• Max Power used in switching
• Digital Function