1. What does a multiplexer do in FM?
- Allows the ramp generator to produce a triangle wave.
- Lets the schmitt trigger produce a triangle wave.
- Lets you chose which signal to transmit.
- Lets the schmitt trigger produce a square wave.
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2. What are the disadvantages of using digital signals to transmit signals?
- Too big and expensive to make
- Slow and limited data transfer
- Easily affected by noise
- Digital signals are hard too transmit
3. How is frequency changed in FM?
- The signal voltage determines the ramp generator rate, which controls the schmitt trigger
- An external switch.
- The resistor values in the schmitt trigger and ramp generator.
- The signal frequency determines the ramp rate, which controls the schmitt trigger.
4. What is the purpose of he MOSFET in the chopping circuit?
- An amplifier
- A current sink
- A switch
- A variable resistor
5. What does a diode detector do in demodulation?
- Outputs a D.C. voltage that follows the signal peak value.
- Stops current flowing back into the rectifier.
- Biases the signal so that the MOSFET can receive all of it.
- Creates a steady signal.