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Viva Questions on Transistor as an Amplifier

 Viva Questions on  Transistor as an Amplifier Short Viva Questions with Answers o n  Transistor as an Amplifier Q.1. What are the Hybrid Parameters (h-parameters)? Explain. Ans. Hybrid parameters are also called as h-parameters. Characteristics of amplifier can be specified easily in terms of h-parameters. The hybrid or h-parameters are very popular and widely used because them give accurate result and can be measured very easily. We know that a transistor is a three terminals device. If one terminal is made common to the Input and output, then the transistor can be represented as a two-port network. Q.2. What do you mean by cascade amplifier? Ans. Cascade amplifier is a composite amplifier pair with a large bandwidth used for RF applications and as a video amplifier. It consists of a CE stage followed by a CB stage directly to each   other and combines some of the features of both the amplifiers. For high frequency applications, CB configuration h...
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Viva Questions on Mobile Radio Propagation

Viva Questions on Mobile Radio Propagation  Short Answer type  Viva Questions on Mobile Radio Propagation  Q.1. What are the two basic types of communication channels? Ans. Basically, there are following two types of communication channels (i)                  wired channels (ii)                radio or wireless channels The wired channels are stationary and predictable whereas the radio channels are extremely random and do not offer easy analysis. Even the speed of motion affects how rapidly the signal level fades as a mobile terminal moves in space. Therefore, it has been most difficult to model a radio channel in mobile radio system design. However, the model of a radio channel is achieved in a statistical manner which is based upon the measurement observed for the desired communication system or spectrum alloca...
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Evolution of Wireless and Cellular Communications Viva Questions

 Evolution of Wireless and Cellular Communications Viva Questions Short Viva Question with  Answers on  Evolution of Wireless and Cellular Communications Q.1. What are the reasons for developing a cellular mobile telephone system? Ans. There are so many reasons for developing a cellular mobile telephone system. Few main reasons may be listed as under:         i.             limitations of conventional mobile telephone systems       ii.             spectrum efficiency considerations     iii.             technology, feasibility, and service affordability Q.2. What are the limitations of conventional mobile telephone systems? Ans. There are the following three limitations of conventional mobile telephone systems: (i) ...
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