Modulating Carriers
Quick Quiz made from the OCR textbook about modulation.
- Created by: Taviline
- Created on: 04-12-14 21:23
Other questions in this quiz
2. How is frequency changed in FM?
- The signal frequency determines the ramp rate, which controls the schmitt trigger.
- The signal voltage determines the ramp generator rate, which controls the schmitt trigger
- The resistor values in the schmitt trigger and ramp generator.
- An external switch.
3. What are the disadvantages of using digital signals to transmit signals?
- Slow and limited data transfer
- Digital signals are hard too transmit
- Easily affected by noise
- Too big and expensive to make
4. What does a multiplexer do in FM?
- Lets the schmitt trigger produce a triangle wave.
- Allows the ramp generator to produce a triangle wave.
- Lets the schmitt trigger produce a square wave.
- Lets you chose which signal to transmit.
5. What is the purpose of he MOSFET in the chopping circuit?
- A current sink
- A switch
- An amplifier
- A variable resistor
Comments
No comments have yet been made