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Table of contents
- Nbfm presentation in 2021
- Fm block diagram
- Types of fm modulators
- Frequency modulation notes
- Frequency modulation pdf
- Frequency modulation problems with solutions pdf
- Wide band frequency modulation
- Nbfm vs wbfm
Nbfm presentation in 2021
Fm block diagram
Types of fm modulators
Frequency modulation notes
Frequency modulation pdf
Frequency modulation problems with solutions pdf
Wide band frequency modulation
Nbfm vs wbfm
What kind of device is used to generate WBFM?
Generation of WBFM • There are two basic methods for generating FM signals known as direct and indirect methods. The direct method makes use of a device called voltage controlled oscillator (VCO) whose oscillation frequency depends linearly on the modulation voltage.
When to use a frequency multiplier for NBFM?
If NBFM wave whose modulation index $\beta$ is less than 1 is applied as the input of frequency multiplier, then the frequency multiplier produces an output signal, whose modulation index is ‘n’ times $\beta$ and the frequency also ‘n’ times the frequency of WBFM wave.
How is the modulation index of a NBFM wave calculated?
Where, ‘n’ is the multiplication factor. If NBFM wave whose modulation index β is less than 1 is applied as the input of frequency multiplier, then the frequency multiplier produces an output signal, whose modulation index is ‘n’ times β and the frequency also ‘n’ times the frequency of WBFM wave.
How is the NBFM generated in a FM transmitter?
Good stability; Lower frequency ac Phase detector DC Voltage Correction dc ac fc Indirect WBFM (Armstrong Method) • Uses NBFM to generate WBFM • The NBFM is generated using indirect method WBFM Using Indirect Method of Armstrong • Two blocks: Mixer and Modulator • Note that the output of NBFM is !
Last Update: Oct 2021
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