Electrical Engineering (EE) Exam  >  Electrical Engineering (EE) Questions  >  For accomplishing negative resistance in osci... Start Learning for Free
For accomplishing negative resistance in oscillator we use
  • a)
    Voltage divider circuit
  • b)
    Negative feedback
  • c)
    Positive feedback
  • d)
    Current divider circuit
Correct answer is option 'C'. Can you explain this answer?
Verified Answer
For accomplishing negative resistance in oscillator we usea)Voltage di...
For accomplishing negative resistance we use positive feedback.
View all questions of this test
Most Upvoted Answer
For accomplishing negative resistance in oscillator we usea)Voltage di...
Negative resistance in oscillator using positive feedback

Positive feedback is a method of providing feedback in an electronic circuit where the output signal is fed back to the input with the same polarity. This type of feedback is used in oscillator circuits to sustain oscillations. Negative resistance is an important characteristic of an oscillator circuit, and it can be achieved using positive feedback. The following are the ways of accomplishing negative resistance in oscillator using positive feedback:

1. Introduction to negative resistance

Negative resistance is a phenomenon where the current flowing through a circuit increases as the voltage across it decreases. In other words, negative resistance is a property of a device that allows it to draw more current as the voltage across it decreases. This characteristic is opposite to that of a resistor, which draws less current as the voltage across it decreases.

2. Positive feedback

Positive feedback is a method of providing feedback in an electronic circuit where the output signal is fed back to the input with the same polarity. This type of feedback is used in oscillator circuits to sustain oscillations. Positive feedback causes the output signal to reinforce the input signal, resulting in an increase in the amplitude of the output signal. This increase in amplitude can be used to compensate for any losses in the circuit and sustain oscillations.

3. Oscillator circuit

An oscillator circuit is a circuit that generates an AC signal without any external input. It consists of an amplifying element, a feedback network, and a resonant circuit. The feedback network provides positive feedback to sustain the oscillations, while the resonant circuit determines the frequency of the oscillations.

4. Negative resistance using positive feedback

Negative resistance can be achieved in an oscillator circuit using positive feedback. This can be done by introducing an active device, such as a transistor or an operational amplifier, in the feedback network. The active device provides gain to the circuit, which can be used to compensate for any losses in the circuit. The gain provided by the active device can also be used to introduce negative resistance into the circuit.

Conclusion

In conclusion, negative resistance in oscillator circuits can be achieved using positive feedback. This can be done by introducing an active device in the feedback network to provide gain to the circuit. The gain provided by the active device can be used to compensate for any losses in the circuit and sustain the oscillations.
Explore Courses for Electrical Engineering (EE) exam

Top Courses for Electrical Engineering (EE)

For accomplishing negative resistance in oscillator we usea)Voltage divider circuitb)Negative feedbackc)Positive feedbackd)Current divider circuitCorrect answer is option 'C'. Can you explain this answer?
Question Description
For accomplishing negative resistance in oscillator we usea)Voltage divider circuitb)Negative feedbackc)Positive feedbackd)Current divider circuitCorrect answer is option 'C'. Can you explain this answer? for Electrical Engineering (EE) 2024 is part of Electrical Engineering (EE) preparation. The Question and answers have been prepared according to the Electrical Engineering (EE) exam syllabus. Information about For accomplishing negative resistance in oscillator we usea)Voltage divider circuitb)Negative feedbackc)Positive feedbackd)Current divider circuitCorrect answer is option 'C'. Can you explain this answer? covers all topics & solutions for Electrical Engineering (EE) 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for For accomplishing negative resistance in oscillator we usea)Voltage divider circuitb)Negative feedbackc)Positive feedbackd)Current divider circuitCorrect answer is option 'C'. Can you explain this answer?.
Solutions for For accomplishing negative resistance in oscillator we usea)Voltage divider circuitb)Negative feedbackc)Positive feedbackd)Current divider circuitCorrect answer is option 'C'. Can you explain this answer? in English & in Hindi are available as part of our courses for Electrical Engineering (EE). Download more important topics, notes, lectures and mock test series for Electrical Engineering (EE) Exam by signing up for free.
Here you can find the meaning of For accomplishing negative resistance in oscillator we usea)Voltage divider circuitb)Negative feedbackc)Positive feedbackd)Current divider circuitCorrect answer is option 'C'. Can you explain this answer? defined & explained in the simplest way possible. Besides giving the explanation of For accomplishing negative resistance in oscillator we usea)Voltage divider circuitb)Negative feedbackc)Positive feedbackd)Current divider circuitCorrect answer is option 'C'. Can you explain this answer?, a detailed solution for For accomplishing negative resistance in oscillator we usea)Voltage divider circuitb)Negative feedbackc)Positive feedbackd)Current divider circuitCorrect answer is option 'C'. Can you explain this answer? has been provided alongside types of For accomplishing negative resistance in oscillator we usea)Voltage divider circuitb)Negative feedbackc)Positive feedbackd)Current divider circuitCorrect answer is option 'C'. Can you explain this answer? theory, EduRev gives you an ample number of questions to practice For accomplishing negative resistance in oscillator we usea)Voltage divider circuitb)Negative feedbackc)Positive feedbackd)Current divider circuitCorrect answer is option 'C'. Can you explain this answer? tests, examples and also practice Electrical Engineering (EE) tests.
Explore Courses for Electrical Engineering (EE) exam

Top Courses for Electrical Engineering (EE)

Explore Courses
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
10M+ students study on EduRev