A diode detector is used to detect an amplitude modulated wave of $60\%$ modulation by using a condenser of capacity $250$ picofarad in parallel with a load resistance $100$ $\Omega$. Find the maximum modulated frequency which could be detected by it.
- $10.62 \,MHz$
- $10.62\, kHz$
- $5.31 \, MHz$
- $5.31 \, kHz$
The Correct Option is B
Solution and Explanation
$ \, \, \, \, \, \, \, 2.5 \times 10^{-5}s$
The higher frequency which can be detected with tolerable distortion is
$f = \frac {1}{2\pi m_aRC} = \frac {1}{2\pi \, \times 0.6 \, \times 2.5 \, \times \, 10^{-5}} Hz$
$\frac {100 \times 10^4}{25 \times 1.2\pi}= Hz$
$ = \frac {4}{1.2\pi} \times 10^4 Hz$
$ = 10.61 kHz$
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Concepts Used:
Communication Systems
A system that describes the information exchange between two points is called the communication system. The transmission and reception process of information is called communication. The major elements of communication are such as:
- The Transmitter of information
- Channel or medium of communication
- The Receiver of information
Examples Of Communication Systems:
The following are the examples of communication systems:
- Internet
- Public Switched Telephone network
- Intranet and Extranet
- Television
Types Of Communication Systems:
Turning on Signal specification or technology, the communication system is categorized as follows:
- Analog technology communicates data as electronic signals of differing frequencies or amplitude. For instance Broadcast and telephone transmission.
- In Digital technology, the data are created and processed in two states: High (represented as 1) and Low (represented as 0). Also this technology stores and transmits data in the form of 1's and 0's.
Elements of a Communication System:
