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What do phase-shift oscillators, twin-T oscillators, and Wien bridge oscillators have in common? a. They use RC frequency control b. They have a sinusoidal output. c. They use amplifier gain to overcome feedback loss.

What do phase-shift oscillators, twin-T oscillators, and Wien bridge oscillators have in common? a. They use RC frequency control b. They have a sinusoidal output. c. They use amplifier gain to overcome feedback loss. Correct Answer a, b and c

Concept:

Twin-T oscillator

Similar to Wein-bridge oscillators, Twin-T oscillators produce a sinewave output for use in fixed-frequency applications.

In the feedback loop of the oscillator, two “Tee” shaped RC networks are used (hence the name).

These networks are located between an inverting amplifier's output and input.​

  • Twin-T configured RC networks provide feedback to the amplifier by directing some of the output signal back into the input terminal.
  • Twin-T RC networks provide 180° of phase-shift while amplifiers provide another 180°.

Twin-T oscillator (also known as a parallel-T oscillator) uses two interconnected resistive-capacitive (RC) networks (with their R and C elements in opposite configuration) connected together in parallel.

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Wein bridge oscillator

The typical structure is shown below:

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The Wien Bridge Oscillator gets its name from the fact that it is a frequency-selective version of the Wheatstone Bridge Circuit.

  • This is a two-stage RC coupled amplifier with excellent stability, low distortion, and easy tuning, making it a popular circuit as an audio frequency oscillator.
  • However, the phase shift of the output signal is quite different from the RC phase shift oscillator.
  • Wien Bridge Oscillators use a feedback circuit consisting of a series circuit connected to a parallel circuit of the same components to produce an advance or delay circuit based on the frequency.

In a Wien-bridge oscillator, resistors and capacitors are connected in a bridge configuration.

Phase shift oscillator

The feedback resistors and capacitors are configured as a ladder network on a typical RC phase-shift oscillator.

  • RC oscillator circuits shift the input 180 degrees through a feedback circuit to produce an out-of-phase signal, then 180 degrees again through an inverting amplifier to achieve the positive feedback. 
  • An RC oscillator, also known as a resistance-capacitance oscillator, makes use of the fact that there is a phase shift between the input and output of a RC network by using interconnected RC elements in the feedback branch.

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All these oscillator use the amplifier gain to overcome the feedback loss.

Conclusion:

All the given statements are correct and common to all three.

Related Questions

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Through a “mindful citizen” exercise, we create a story articulating who we are as individuals who are also part of communities. This exercise helps us move beyond cynicism, complacency, and despair, instead infusing us with a sense of purpose. We embrace our gifts, resolving to do our part to promote a sense of common humanity as a means toward social justice.
With this exercise, I believe we can help students bridge their divides and replace anger and distrust with compassionate connections – just as I witnessed betweenShirley and Tiffany.
Shirley returned to class after a brief hiatus, keeping a cool distance from Tiffany. But over the weeks spent together they gradually came to know each other. They practiced seeing and listening, sharing stories so different that they felt bewildered as to how they could overcome the gap. But they found that acknowledging their differences led them to discover a place of deep connection in commonalities, such as being raised by grandmothers, and even wounds, including childhood trauma,that they never imagined existed.
In assessments of these classes, students say that these small groups become “healing communities,” where we overcome victimization and claim agency. Healingoccurs as we transcend an “us vs. them” mentality, crossing borders and forging connections. These communities show a way of reducing intergroup prejudice andfostering inclusion based in psychology research and pedagogical practice. How students can replace their anger and distrust?
Read the passage carefully and select the best answer to each question out of the given four alternatives. By practicing mindfulness and other principles, we become more aware of and present to our fears and others fears, bearing witness as a way of healing andempowering. We see the spiritual path as intertwined with the path of social action, with contemplation and action parts of the same whole, each nourishing andguiding the other. Acknowledging that our well-being depends on others makes caring for others well-being a moral responsibility.
Through a “mindful citizen” exercise, we create a story articulating who we are as individuals who are also part of communities. This exercise helps us move beyond cynicism, complacency, and despair, instead infusing us with a sense of purpose. We embrace our gifts, resolving to do our part to promote a sense of common humanity as a means toward social justice.
With this exercise, I believe we can help students bridge their divides and replace anger and distrust with compassionate connections – just as I witnessed betweenShirley and Tiffany.
Shirley returned to class after a brief hiatus, keeping a cool distance from Tiffany. But over the weeks spent together they gradually came to know each other. They practiced seeing and listening, sharing stories so different that they felt bewildered as to how they could overcome the gap. But they found that acknowledging their differences led them to discover a place of deep connection in commonalities, such as being raised by grandmothers, and even wounds, including childhood trauma,that they never imagined existed.
In assessments of these classes, students say that these small groups become “healing communities,” where we overcome victimization and claim agency. Healingoccurs as we transcend an “us vs. them” mentality, crossing borders and forging connections. These communities show a way of reducing intergroup prejudice andfostering inclusion based in psychology research and pedagogical practice. What was the reason behind the strong connection between Shirley and Tiffany?