What is the function of blocking oscillator?
What is the function of blocking oscillator?
A blocking oscillator (sometimes called a pulse oscillator) is a simple configuration of discrete electronic components which can produce a free-running signal, requiring only a resistor, a transformer, and one amplifying element such as a transistor or vacuum tube.
What are the two types of astable blocking oscillators?
Here, two types of astable blocking oscillators are considered: a diode-controlled astable blocking oscillator and an RC-controlled astable blocking oscillator.
Which amplifier is used in the design of oscillator?
Transistor Amplifier − The output of the tank circuit is connected to the amplifier circuit so that the oscillations produced by the tank circuit are amplified here. Hence the output of these oscillations are increased by the amplifier.
What are the advantages of core saturation method of frequency control in a blocking oscillator?
What are tha advantages of core saturation method of frequency control in a blocking oscillator? The pulse duration depends on the supply voltage and characteristics of the core and not on the transistor parameters (hfe). 7. State any two methods of achieving sweep linearity of a time-base waveform.
What is oscillator transformer?
An Oscillator is a circuit used to produce an alternating voltage or current. When produced by discrete components, an oscillator requires some form of amplification and feedback from the output to the input.
What is a pulse oscillator?
Pulse coupled oscillators are limit cycle oscillators that are coupled in a pulsatile rather than smooth manner.
What is the use of oscillators in electronics?
Electronic oscillators are used to generate signals in computers, wireless receivers and transmitters, and audio-frequency equipment, particularly music synthesizers.
What is the working principle of oscillator?
An oscillator is the basic element of ac signal sources and generates sinusoidal signals of known frequency and amplitude. The main applications of oscillators are as sinusoidal waveform sources in electronic measurements.
What are the basic components required to design an oscillator?
It has basically three major components which are: (i) tank circuit (ii) amplifier and (iii) feedback circuit, It can be clearly seen in the block diagram given below: Continuous oscillations are the idea of working on an oscillator.
Why is amplifier circuit necessary in an oscillator?
Basically, an oscillator is an amplifier whose output is connected back to its own input. However, for oscillation to occur certain conditions must be met: 1) The transistor must have enough gain (amplification) to overcome feedback losses 2) The feedback must be in the correct phase. It must be positive feedback.
How does a relaxation oscillator work?
A relaxation oscillator is a repeating circuit (like the flasher circuit illustrated above) which achieves its repetitive behavior from the charging of a capacitor to some event threshold. The event discharges the capacitor, and its recharge time determines the repetition time of the events.