Question

The values of h-parameters of a transistor in CE arrangement are ________ arrangement.

(a) same as for CB

(b) same as for CC

(c) different from that in CB

(d) similar to no

The question was asked during an interview for a job.

Enquiry is from Transistor Hybrid Model topic in portion Small-Signal Low-Frequency AC models of Transistors of Electronic Devices & Circuits

Answer 1

Correct option is (c) different from that in CB

To explain: The values of h-parameter in CE arrangement:

Hie = Vbe/Ib;   for Vce = 0 (output short circuited)

Hfe = ic/ib;   for Vce = 0   (output short circuited)

Hre = Vbe/Vce;    for ib = 0   (input open circuited)

Hoe = ic/vce;    for ib = 0   (input open circuited)  

The values of h-parameter in CB arrangement:

Hib = Vbe/Ie;   for Vbc = 0 (output short circuited)

Hfb = ic/Ie;   for Vbc = 0   (output short circuited)

Hrb = Vbe/Vbc;    for ie = 0   (input open circuited)

Hob = ic/vbe;    for ie = 0   (input open circuited).