Some radio-frequency amplifiers must be...

🔍 Key Concepts

• RF amplifiers and feedback – how unintended feedback within an amplifier stage can affect stability • Oscillation vs. amplification – what happens when an RF stage starts acting like an oscillator instead of just amplifying a signal • Neutralization – why small, unwanted capacitances between input and output can cause problems at radio frequencies

💭 Think About

• Ask yourself: What problem does neutralization directly correct in an RF amplifier – does it add feedback, remove it, or change its character? • Consider what happens if a tiny amount of the output signal feeds back into the input at just the right phase and amplitude. Does that support stable amplification or cause self‑oscillation? • Think about which choice describes a condition you would want to avoid in an amplifier that is supposed to boost an incoming signal from your radio, not generate its own signals.

✅ Before You Answer

• Verify which option mentions preventing a harmful condition in an RF amplifier, not creating one. • Check your understanding of positive vs. negative feedback: which type tends to cause oscillations, and which type can improve linearity? • Confirm which answer best matches the idea of cancelling unwanted coupling between input and output stages so the amplifier does not start to act like an oscillator.

Some radio-frequency amplifiers must be neutralized:

To maintain linear operation

To prevent sustained oscillations from occurring in the amplifier

Sustain feedback

None of the above

🔍 Key Concepts

💭 Think About

✅ Before You Answer