The circuit shown in Fig. 8C10 is the output...

Question 1 / 20Zc2ZQWl10Wfi4Sodsdnp

Question 1 of 20Zc2ZQWl10Wfi4Sodsdnp

The circuit shown in Fig. 8C10 is the output of a switching power supply. Measuring from the junction of CR6, CR7 and L1 to ground with an oscilloscope, what waveform would you expect to see?

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Question 1 of 20

Zc2ZQWl10Wfi4Sodsdnp

The circuit shown in Fig. 8C10 is the output of a switching power supply. Measuring from the junction of CR6, CR7 and L1 to ground with an oscilloscope, what waveform would you expect to see?

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🔍 Key Concepts

• Location in the circuit: junction of CR6, CR7, and L1 in a switching (not linear) power supply • Function of diodes (CR6, CR7) and inductor (L1) in rectifying and smoothing high-frequency outputs • Difference between line frequency (50/60 Hz) and switching frequency (typically tens of kHz or higher)

💭 Think About

• Think about what comes out of the switching element and rectifier stage before the final smoothing capacitor in a switching power supply • Ask yourself whether this test point is before or after the main output filter that produces smooth DC • Compare what waveform you would see in a simple 60 Hz rectifier circuit versus what happens when the supply chops DC at a much higher frequency

✅ Before You Answer

• Identify whether the waveform at that junction should be related to line frequency or to the switching frequency • Decide if the presence of L1 alone is enough to create perfectly smooth (filtered) DC at that test point, or if additional capacitors are required downstream • Confirm that diodes CR6 and CR7 are being used as part of a rectifier for a high-frequency switching waveform rather than a simple mains rectifier

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Question 1 of 20

The circuit shown in Fig. 8C10 is the output of a switching power supply. Measuring from the junction of CR6, CR7 and L1 to ground with an oscilloscope, what waveform would you expect to see?

Filtered DC.

Pulsating DC at line frequency.

AC at line frequency.

Pulsating DC much higher than line frequency.

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Question 1 / 20Zc2ZQWl10Wfi4Sodsdnp

Question 1 of 20Zc2ZQWl10Wfi4Sodsdnp

The circuit shown in Fig. 8C10 is the output of a switching power supply. Measuring from the junction of CR6, CR7 and L1 to ground with an oscilloscope, what waveform would you expect to see?

Back

Question 1 of 20

Zc2ZQWl10Wfi4Sodsdnp

The circuit shown in Fig. 8C10 is the output of a switching power supply. Measuring from the junction of CR6, CR7 and L1 to ground with an oscilloscope, what waveform would you expect to see?

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

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— No credit card needed