This question was previously asked in
JVVNL Technical Helper 25 Aug 2018 Official Paper
- emitter bias
- voltage divider bias
- base bias
- collector bias
- none of these
Answer (Detailed Solution Below)
Option 2 : voltage divider bias
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ST 1: JVVNL Technical Helper - Soldering, Basic Workshop & Safety Practice
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20 Questions 20 Marks 25 Mins
Detailed Solution
Download Solution PDFVoltage Divider Biasing:
The circuit diagram of the voltage divider bias circuit is:
![[Solved] Which of the following is also known as universal bias? (2)](https://i0.wp.com/storage.googleapis.com/tb-img/production/22/04/62236077ab8a397676b9d7b4_16498614736151.png "[Solved] Which of the following is also known as universal bias? (2)")
In a voltage bias circuit, ICis almost equal to IE
\(I_C = {V_2-V_{BE} \over R_E}\)...........(i)
IC= Collector current
VBE= Base to emitter voltage
RE= Emitter resistance
Explanation:
Voltage divider biasing isknown as a universal bias circuit because:
- From equation (i), it is observed that collector current (IC) is independent of transistor parameters (β, VBE) and hence good stabilization is achieved.
- In voltage biasing, the transistor always remains in the active region which is not achievable in other biasing methods.
![[Solved] Which of the following is also known as universal bias? (3)](https://i0.wp.com/cdn.testbook.com/resources/lms_creative_elements/additional-information-image.png "[Solved] Which of the following is also known as universal bias? (3)")
Additional Information
- Emitter Bias:Emitter bias provides excellent bias stability in spite of changes in β. Hence, this biasing method depends on current gain (β).
- Base Bias:Base bias ensures that the voltage fed to the base is enough which can supply enough base current to switch the transistor ON.
- Collector Bias:This method helps in improving stability considerably. If the value of ICincreases, the voltage across the load increases, and hence VCEalso increases. This in turn reduces the base current (IB).
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