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Amateur Extra Class: 2020–2024
Today
Sections
E1: Commission's Rules
E2: Operating Procedures
E3: Radio Wave Propagation
E4: Amateur Practices
E5: Electrical Principles
E6: Circuit Components
E7: Practical Circuits
E8: Signals and Emissions
E9: Antennas and Transmission Lines
E0: Safety
Quick Index
Practice Test
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Element 4
E6
E6C
E6C03
E6C03:
What is tri-state logic?
Logic devices with 0, 1, and high-impedance output states
Logic devices that utilize ternary math
Low-power logic devices designed to operate at 3 volts
Proprietary logic devices manufactured by Tri-State Devices
E6C01
E6C02
E6C03
E6C04
E6C05
E6C06
E6C07
E6C08
E6C09
E6C10
E6C11