What are oscillator circuits used for?
For example, an RC oscillator is used to generate a Low Frequency signal, an LC oscillator is used to generate a High Frequency signal, and an Op-Amp based oscillator is used to generate a stable frequency. The frequency of oscillation can be varied by varying the component value with potentiometer arrangements.
What is the basic oscillatory circuit?
The oscillatory circuit, also called the L-C circuit or tank circuit, consists of an inductive coil of inductance L connected in parallel with a capacitor of capacitance C. The values of L and C determines the frequency of oscillations produced by the circuit.
What is an oscillator used for in hospitals?
The Hayek Oscillator is a non-invasive high frequency ventilator which offers the first real alternative to conventional mechanical ventilation and enhances secretion removal. The Oscillator controls both inspiratory and expiratory phases and is thus capable of ventilating both normal and sick lungs.
What are the two requirements for oscillation?
What are the Two Requirements for Oscillation?
- The oscillator requires amplification to provide the necessary gain for the signal.
- To sustain oscillations, the oscillator requires sufficient regenerative feedback.
Why amplifier is used in oscillator?
A POSITIVE feedback path. Commonly an oscillator is constructed from an amplifier that has part of its output signal fed back to its input. This is done in such a way as to keep the amplifier producing a signal without the need for any external signal input as shown in Fig.
What are the main uses of an oscillator?
Some common applications of oscillators include: Quartz watches (which uses a crystal oscillator) Used in various audio systems and video systems Used in various radio, TV, and other communication devices Used in computers, metal detectors, stun guns, inverters, ultrasonic and radio frequency applications. Used to generate clock pulses for microprocessors and micro-controllers
What are conditions for an oscillator to oscillate?
Regardless of its amplifier, an oscillator must meet the two Barkhousen conditions for oscillation: 1 – The loop gain must be slightly greater than unity. 2 – The loop phase shift must be 0° or 360°.
How does an oscillator oscillate?
The oscillator starts generating oscillations by amplifying the noise voltage which is always present. This noise voltage is result of the movement of free electrons under the influence of room temperature. This noise voltage is not exactly in sinusoidal due to saturation conditions of practical circuit.
How does a transistor act as an oscillator?
A transistor can be operated as an oscillator for producing continuous undamped oscillations of any desired frequency if tank (or oscillatory) and feedback circuits are property connected to it. All oscillators under different names have similar function i.e. they generate continuous undamped output.