Basic Electrical and Electronics Engineering: Unit III: Analog Electronics
Need for Biasing in Transistor
When an input AC signal only is applied to the circuit then input junction becomes forward biased results in current flows from emitter to base then base to collector circuit.
NEED
FOR BIASING
When
an input AC signal only is applied to the circuit (without any DC) as shown in
fig.3.53 (a). During positive half cycle of input (Vin > V) then
input junction becomes forward biased results in current flows from emitter to
base then base to collector circuit.
During
negative half cycle of input the junction becomes reverse biased so, no current
flows in the circuit, results in negative cycle is not amplified as shown in
fig.3.53 (b).
To
obtain faithful amplification the following three conditions needs to be
satisfied.
(i)
Emitter Base junction should be forward biased.
(ii)
Collector Base junction should be reverse biased.
(iii)
There should be proper zero signal collector current
The
proper flow of zero signal collector current and the maintenance of proper
collector-emitter voltage during the passage of signal is known as transistor
biasing. It is important that the AC input voltage should be smaller than the
biasing voltage, otherwise the above mentioned problem repeats at every cycle.
Basic Electrical and Electronics Engineering: Unit III: Analog Electronics : Tag: : - Need for Biasing in Transistor
Basic Electrical and Electronics Engineering: Unit III: Analog Electronics
Under Subject
Basic Electrical and Electronics Engineering
BE3251 2nd semester Mechanical Dept | 2021 Regulation | 2nd Semester Mechanical Dept 2021 Regulation
Basic Electrical and Electronics Engineering
BE3251 2nd Semester CSE Dept 2021 | Regulation | 2nd Semester CSE Dept 2021 Regulation
Related Subjects
Professional English II
HS3251 2nd Semester 2021 Regulation | 2nd Semester Common to all Dept 2021 Regulation
Statistics and Numerical Methods
MA3251 2nd Semester 2021 Regulation M2 Engineering Mathematics 2 | 2nd Semester Common to all Dept 2021 Regulation
Engineering Graphics
GE3251 eg 2nd semester | 2021 Regulation | 2nd Semester Common to all Dept 2021 Regulation
Physics for Electrical Engineering
PH3202 2nd Semester 2021 Regulation | 2nd Semester EEE Dept 2021 Regulation
Basic Civil and Mechanical Engineering
BE3255 2nd Semester 2021 Regulation | 2nd Semester EEE Dept 2021 Regulation
Electric Circuit Analysis
EE3251 2nd Semester 2021 Regulation | 2nd Semester EEE Dept 2021 Regulation
Physics for Electronics Engineering
PH3254 - Physics II - 2nd Semester - ECE Department - 2021 Regulation | 2nd Semester ECE Dept 2021 Regulation
Electrical and Instrumentation Engineering
BE3254 - 2nd Semester - ECE Dept - 2021 Regulation | 2nd Semester ECE Dept 2021 Regulation
Circuit Analysis
EC3251 - 2nd Semester - ECE Dept - 2021 Regulation | 2nd Semester ECE Dept 2021 Regulation
Materials Science
PH3251 2nd semester Mechanical Dept | 2021 Regulation | 2nd Semester Mechanical Dept 2021 Regulation
Basic Electrical and Electronics Engineering
BE3251 2nd semester Mechanical Dept | 2021 Regulation | 2nd Semester Mechanical Dept 2021 Regulation
Physics for Civil Engineering
PH3201 2021 Regulation | 2nd Semester Civil Dept 2021 Regulation
Basic Electrical, Electronics and Instrumentation Engineering
BE3252 2021 Regulation | 2nd Semester Civil Dept 2021 Regulation
Physics for Information Science
PH3256 2nd Semester CSE Dept | 2021 Regulation | 2nd Semester CSE Dept 2021 Regulation
Basic Electrical and Electronics Engineering
BE3251 2nd Semester CSE Dept 2021 | Regulation | 2nd Semester CSE Dept 2021 Regulation
Programming in C
CS3251 2nd Semester CSE Dept 2021 | Regulation | 2nd Semester CSE Dept 2021 Regulation