Question
Download Solution PDFWhich type of configuration has high output impedance but low input impedance ?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFCommon Base configuration has high output impedance but low input impedance.
Concept:
In common emitter configuration, the emitter terminal is grounded so the common emitter configuration is also known as grounded emitter configuration.
As the emitter current is zero in the cut-off region, the potential VE is called floating emitter potential.
- The Bipolar Junction Transistor (BJT) is a three-terminal device i.e. Base, Emitter, and Collector.
- There are two main types of bipolar junction transistors the NPN and the PNP transistor.
- The emitter is a heavily doped region of the BJT transistor, providing the majority of carriers into the base region.
- The base region is a thin, lightly doped region sandwiched between the emitter and collector.
- The majority of carriers from the emitter pass through the base region and its flow can be externally controlled.
Working configuration of BJT
|
Characteristic |
Common Base |
Common Emitter |
Common Collector |
|
Input resistance |
Very low (40 Ω) |
Low (100 Ω) |
Very high (750 kΩ) |
|
Output resistance |
Very high (1 MΩ) |
High (10 kΩ) |
Low (50 Ω) |
|
Current gain |
Less than unity |
High (100) |
High (100) |
|
Voltage gain |
Small (150) |
High (500) |
Less than unity |
|
Phase Shift |
0° |
180° |
0° |
Last updated on May 9, 2025
-> PGCIL Diploma Trainee result 2025 will be released in the third week of May.
-> The PGCIL Diploma Trainee Answer key 2025 has been released on 12th April. Candidates can raise objection from 12 April to 14 April 2025.
-> The PGCIL DT Exam was conducted on 11 April 2025.
-> Candidates had applied online from 21st October 2024 to 19th November 2024.
-> A total of 666 vacancies have been released.
-> Candidates between 18 -27 years of age, with a diploma in the concerned stream are eligible.
-> Attempt PGCIL Diploma Trainee Previous Year Papers for good preparation.