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R-C phase shift oscillator and Wein bridge oscillator are the commonly used circuits for generating ________ waveform of a required frequency.
- a)sine
- b)negative
- c)cosine
- d)both sine and cosine
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
R-C phase shift oscillator and Wein bridge oscillator are the commonly...
The R-C phase shift oscillator and Wein bridge oscillator are the commonly used circuits for generating a sinusoidal waveform of required frequency.
RC Phase shift oscillator:
The circuit diagram of the RC phase shift oscillator is shown below:
- The phase shift oscillator is a linear electronic circuit that produces a sine wave output.
- It consists of an inverting amplifier element such as a transistor or op-amp with its output feedback to its input through a phase shift network consisting of resistors and capacitors in a ladder network.
- The feedback network shifts the phase of the amplifier output by 1800 at the oscillation frequency to give positive feedback.
Wein bridge oscillator:
The circuit diagram of the Wein bridge oscillator is shown below:
- The Wein bridge oscillator uses two RC networks connected together to produce a sinusoidal oscillator.
- The Wein bridge oscillator uses a feedback circuit consisting of a series RC circuit connected with a parallel RC of the same component values producing a phase delay or phase advance depending upon the circuit frequency
- At the resonant frequency, the phase shift is 00.
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R-C phase shift oscillator and Wein bridge oscillator are the commonly...
R-C phase shift oscillator and Wein bridge oscillator are commonly used circuits for generating sine waveform of a required frequency. Let's understand each oscillator in detail:
1. R-C Phase Shift Oscillator:
- The R-C phase shift oscillator is a type of feedback oscillator that uses an RC network (resistor-capacitor network) to provide phase shift.
- The basic principle of the R-C phase shift oscillator is that the phase shift of the RC network changes with frequency.
- The RC network consists of multiple stages of RC filter circuits connected in series.
- Each stage provides a phase shift of 60 degrees, resulting in a total phase shift of 180 degrees or more.
- The feedback network is connected to an amplifier, which amplifies the signal and feeds it back to the RC network.
- The phase shift provided by the RC network and the gain of the amplifier are carefully designed to ensure positive feedback and oscillation.
- The frequency of oscillation is determined by the values of resistors and capacitors in the RC network.
- The output waveform of the R-C phase shift oscillator is a sine waveform.
2. Wein Bridge Oscillator:
- The Wein bridge oscillator is another type of feedback oscillator that uses a bridge network known as the Wein bridge.
- The Wein bridge consists of resistors and capacitors connected in a specific configuration.
- The bridge network is connected to an amplifier, which amplifies the signal and feeds it back to the bridge network.
- The feedback network and the amplifier are designed such that the bridge network operates at its resonant frequency.
- The frequency of oscillation is determined by the values of resistors and capacitors in the bridge network.
- The output waveform of the Wein bridge oscillator is a sine waveform.
Comparison:
- Both the R-C phase shift oscillator and Wein bridge oscillator are used to generate sine waveforms of a required frequency.
- The R-C phase shift oscillator uses an RC network for phase shift, while the Wein bridge oscillator uses a bridge network.
- The R-C phase shift oscillator provides a phase shift of 180 degrees or more, while the Wein bridge oscillator operates at its resonant frequency.
- The frequency of oscillation in both oscillators is determined by the values of resistors and capacitors.
- Both oscillators require an amplifier for positive feedback and oscillation.
In conclusion, the R-C phase shift oscillator and Wein bridge oscillator are commonly used circuits for generating sine waveforms of a required frequency.
1. R-C Phase Shift Oscillator:
- The R-C phase shift oscillator is a type of feedback oscillator that uses an RC network (resistor-capacitor network) to provide phase shift.
- The basic principle of the R-C phase shift oscillator is that the phase shift of the RC network changes with frequency.
- The RC network consists of multiple stages of RC filter circuits connected in series.
- Each stage provides a phase shift of 60 degrees, resulting in a total phase shift of 180 degrees or more.
- The feedback network is connected to an amplifier, which amplifies the signal and feeds it back to the RC network.
- The phase shift provided by the RC network and the gain of the amplifier are carefully designed to ensure positive feedback and oscillation.
- The frequency of oscillation is determined by the values of resistors and capacitors in the RC network.
- The output waveform of the R-C phase shift oscillator is a sine waveform.
2. Wein Bridge Oscillator:
- The Wein bridge oscillator is another type of feedback oscillator that uses a bridge network known as the Wein bridge.
- The Wein bridge consists of resistors and capacitors connected in a specific configuration.
- The bridge network is connected to an amplifier, which amplifies the signal and feeds it back to the bridge network.
- The feedback network and the amplifier are designed such that the bridge network operates at its resonant frequency.
- The frequency of oscillation is determined by the values of resistors and capacitors in the bridge network.
- The output waveform of the Wein bridge oscillator is a sine waveform.
Comparison:
- Both the R-C phase shift oscillator and Wein bridge oscillator are used to generate sine waveforms of a required frequency.
- The R-C phase shift oscillator uses an RC network for phase shift, while the Wein bridge oscillator uses a bridge network.
- The R-C phase shift oscillator provides a phase shift of 180 degrees or more, while the Wein bridge oscillator operates at its resonant frequency.
- The frequency of oscillation in both oscillators is determined by the values of resistors and capacitors.
- Both oscillators require an amplifier for positive feedback and oscillation.
In conclusion, the R-C phase shift oscillator and Wein bridge oscillator are commonly used circuits for generating sine waveforms of a required frequency.
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