What are the benefits of h-parameters? 1. Easy to measure 2. Co

SOLUTION

• The h- parameters are dependent on the conductivity parameters of the transistor which vary with intrinsic carrier concentration.
• Since intrinsic carrier concentration varies with temperature the h-parameters vary with temperature.
• Every linear circuit having input and output can be analyzed as two-port networks. In these networks, there are four parameters called hybrid or h-parameter.
• Out of these four parameters, one is measured in ohm, one in mho, and the other two are dimensionless.
• Since these parameters have mixed dimensions, so they are called hybrid parameters.

 

hi = input resistance with output shorted (Ω)

hr = Reverse voltage gain with input open (V)

hf = Forward current gain with output shorted

ho = Output conductance with input open

Advantages of h-parameter:

1. Easy to measure

2. Convenient to use in circuit analysis and design

3. Real numbers at audio frequencies

4. Can be obtained from the transistor static characteristics curves

5. Most of the transistor manufacturers specify the h-parameters.