🔍 Key Concepts

• Class A amplifier conduction over the entire 360° of the input cycle • Relationship between linearity and efficiency in amplifiers • Typical efficiency ranges of Class A vs Class B/AB/C amplifiers

💭 Think About

• Is a Class A amplifier designed more for maximum power efficiency or for signal fidelity (low distortion)? • If the active device conducts for the full 360° cycle, does it spend more time dissipating power or delivering it efficiently to the load? • Which answer choices seem more realistic for an always-conducting device that prioritizes linearity?

✅ Before You Answer

• Remember that no practical amplifier can be 100% efficient because of heat loss and device limitations • Compare the given percentages with typical textbook values for Class A amplifier efficiency • Consider whether 60% and above are more commonly associated with other amplifier classes (e.g., Class B, Class C) rather than Class A