Consider the following statements associated with the use of h-paramet...
h-parameters are real numbers upto radio frequency only. The smallest value of h-parameter is that of open circuit output admittance (h0). Hence, statements 2 and 4 are not correct.
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Consider the following statements associated with the use of h-paramet...
Explanation:
h-parameters, also known as hybrid parameters or hybrid-π parameters, are a set of four parameters commonly used to describe the behavior of a transistor in a linear operating region. The correct statements associated with the use of h-parameters are as follows:
1. They are easy to measure:
h-parameters can be easily measured by performing a set of standard tests on the transistor. These measurements involve applying known input voltages and currents and measuring the resulting output voltages and currents. Therefore, statement 1 is correct.
2. They are real numbers for all frequency range:
h-parameters are typically considered to be frequency-independent for small-signal analysis. In other words, they can be assumed to be constant over a certain frequency range. However, at high frequencies or for large-signal analysis, the h-parameters may vary with frequency or signal level. Therefore, statement 2 is incorrect.
3. They are easily convertible from one configuration to another:
One of the advantages of h-parameters is that they can be easily converted from one transistor configuration to another. For example, the h-parameters for a common-emitter configuration can be converted to those for a common-base or common-collector configuration using simple equations. Therefore, statement 3 is correct.
4. The smallest value of h-parameter for a transistor configuration is that of short circuit input impedance (hi):
The h-parameters describe the input and output impedance, as well as the voltage and current gain of a transistor. The smallest value of h-parameter for a specific transistor configuration depends on the particular application and operating conditions. Therefore, statement 4 is incorrect.
In summary, the correct statements associated with the use of h-parameters to describe a transistor are:
1. They are easy to measure.
3. They are easily convertible from one configuration to another.
Therefore, the correct answer is option C: 1 and 3.
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