![]() ![]() Can you explain this answer? defined & explained in the simplest way possible. Here you can find the meaning of Assertion (A): The Darlington connection of three or more transistors is usually impractical.Reason (R): The Darlington emitter follower has a higher input resistance and a voltage gain less close to unity than does a single-stage emitter follower.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2023 Exam.įind important definitions, questions, meanings, examples, exercises and tests below for Assertion (A): The Darlington connection of three or more transistors is usually impractical.Reason (R): The Darlington emitter follower has a higher input resistance and a voltage gain less close to unity than does a single-stage emitter follower.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'B'. Information about Assertion (A): The Darlington connection of three or more transistors is usually impractical.Reason (R): The Darlington emitter follower has a higher input resistance and a voltage gain less close to unity than does a single-stage emitter follower.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'B'. The Electrical Engineering (EE) exam syllabus. ![]() The Question and answers have been prepared Can you explain this answer? for Electrical Engineering (EE) 2023 is part of Electrical Engineering (EE) preparation. Therefore, even though the Darlington connection offers advantages such as high input impedance, low output impedance, and high current gain, it is usually impractical to use it in circuits that require high bandwidth, low power dissipation, or low input current.Īssertion (A): The Darlington connection of three or more transistors is usually impractical.Reason (R): The Darlington emitter follower has a higher input resistance and a voltage gain less close to unity than does a single-stage emitter follower.a)Both A and R are true and R is the correct explanation of A.b)Both A and R are true but R is not the correct explanation of A.c)A is true but R is false.d)A is false but R is true.Correct answer is option 'B'. The Darlington connection increases the overall power dissipation of the circuit, which can lead to thermal problems in high-power applications.The Darlington connection increases the overall capacitance of the circuit, which can lead to stability problems at higher frequencies.This means that the output voltage of the Darlington connection is lower than that of a single-stage emitter follower. The voltage gain of the Darlington emitter follower is less close to unity than that of a single-stage emitter follower.This means that the base current required for a given collector current is higher than that required for a single-stage emitter follower. The input resistance of the Darlington emitter follower is high, which reduces the current gain.The Darlington connection of three or more transistors is usually impractical because of the following reasons: ![]()
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