Electronics and Communication Engineering - Exam Questions Papers - Discussion
Discussion Forum : Exam Questions Papers - Exam Paper 3 (Q.No. 45)
45.
A bipolar differential amplifier uses a transistor having β0 = 200, ICQ = 100 mA, |Adm| = 500 and CMRR = 80 dB. The value of Rc and RE will be respectively __________ .
Answer: Option
Explanation:
80 = 20 log CMRR
∴ CMRR = 10000
But CMRR = 2gmRE
∴ 
= 1.25 MΩ
Adm = - gmRC
= 1.25 KΩ.
Discussion:
2 comments Page 1 of 1.
Sitharam said:
8 years ago
How could you tell VT=25?
Can anyone explain?
Can anyone explain?
Marcus Liwag said:
1 decade ago
Shouldn't Re be 1.25k ohms and Rc 125 ohms?
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