BALANCE AND ADJUSTING ENTRIES CORE
CONCEPTS OVERVIEW
◉ How does Eb (Base voltage) determine the class of amplifier?
Answer: Class A Eb > .6
Class B Eb = .6
Class C Eb < .6
◉ Properties of a Class A?
Answer: High fidelity, low efficiency, DC bias point within cutoff and
saturation limit.
◉ Properties of Class B?
Answer: Medium fidelity, medium efficiency, DC bias point at cutoff.
Biased so collector current is 0 for half of input signal.
◉ Properties of Class C?
Answer: Low fidelity, high efficiency, DC bias point below cutoff.
Biased so collector current is 0 for most of input signal.
, ◉ In a Common Emitter, how does an open capacitor affect Base
Bias?
Answer: It doesn't.
◉ When should you start troubleshooting an individual stage?
Answer: After the faulty stage has been identified. (Don't Easter egg)
◉ What is direct coupling for?
Answer: Low frequency input.
◉ Direct coupling doesn't use_________.
Answer: Reactive components.
◉ Transformer coupling doesn't use ____________, but it still uses
_______________.
Answer: coupling capacitors, a reactive component.
◉ What does LC coupling have the collector load resistor replaced
with?
Answer: A reactive component.
◉ Clipping occurs in an RC coupled amplifier when the______________.