oscillators and signal generators pdf

Oscillators and signal generators pdf

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Function Generators

Signal Generators

RF signal generator operation

There are a variety of instruments available to generate electronic signals these days. They go by different names and provide different kinds of outputs.

Function Generators

A function generator is a signal source that has the capability of producing different types of waveforms as its output signal. The most common output waveforms are sine-waves, triangular waves , square waves , and sawtooth waves. The frequencies of such waveforms may be adjusted from a fraction of a hertz to several hundred kHz. Actually, the function generators are very versatile instruments as they are capable of producing a wide variety of waveforms and frequencies. In fact, each of the waveforms they generate is particularly suitable for a different group of applications.

A function generator, which is used for testing the response of circuits to commonplace input signals, produces various voltage patterns at different frequencies and amplitudes. The majority of function generators enable you to pick the shape of the output from several options including square wave, in which the signal immediately goes from high to low voltage; sine wave, in which the signal curves from high to low voltage like a sinusoid; and triangle wave, in which the signal goes from high to low voltage at a fixed rate. Advanced function generators — known as arbitrary waveform generators — use direct digital synthesis techniques to generate any waveform that can be described by a table of amplitudes. On certain function generators the frequency control combines several different controls: one set of controls sets the frequency range, or order of magnitude, while the other selects the exact frequency. This enables the function generator to handle the dramatic variation in frequency scale required for signals. You use a function generator by powering it on and configuring the output signal to your intended shape. This entails connecting the ground and signal leads to your oscilloscope to check the controls.

Signal Generators

Signal generator , electronic test instrument that delivers an accurately calibrated signal at frequencies from the audio to the microwave ranges. It is valuable in the development and testing of electronic hardware. The signal generator provides a signal that can be adjusted according to frequency, output voltage, impedence, waveform, and modulation. Signal generators are of five major types: oscillators , which generate sine waves useful in measuring the response of loudspeakers, amplifiers, microphones, transducers, and acoustic systems; standard signal generators, which generate sine waves over a wide range of output power and modulation, used, for example, to test radio receivers and measure gain, bandwidth , and signal-to-noise ratio; frequency synthesizers , which generate highly precise output frequencies over wide ranges; pulse generators, which produce pulsed signals at precise duration at precise frequencies; and random-noise generators, which produce a wideband noise for various types of electronic, mechanical, and psychological testing. Signal generator Article Media Additional Info. Print Cite verified Cite. While every effort has been made to follow citation style rules, there may be some discrepancies.

Skip to Main Content. A not-for-profit organization, IEEE is the world's largest technical professional organization dedicated to advancing technology for the benefit of humanity. Use of this web site signifies your agreement to the terms and conditions. This scheme combines the respective advantages of i fast access and power efficiency of reasonably sized LUTs and of ii in principle arbitrary precision obtainable from a rigorous iteration algorithm. First order error models are presented as guidelines for choosing internal NCO parameters, as word lengths and the number of CORDIC stages for a given amplitude resolution. The NCO models are synthesized in a 0.

RF signal generator operation

A signal generator is one of a class of electronic devices that generates electronic signals with set properties of amplitude, frequency, and wave shape. These generated signals are used as a stimulus for electronic measurements, typically used in designing, testing, troubleshooting, and repairing electronic or electroacoustic devices, though it often has artistic uses as well. There are many different types of signal generators with different purposes and applications and at varying levels of expense. These types include function generators , RF and microwave signal generators, pitch generators, arbitrary waveform generators , digital pattern generators , and frequency generators. In general, no device is suitable for all possible applications.

Signal generator is an electronic equipment that provides standard test signals like sine wave, square wave, triangular wave and etc. It is also called an oscillator, since it produces periodic signals. The signal generator, which produces the periodic signal having a frequency of Audio Frequency AF range is called AF signal generator.

This is used as a stimulus for the item being tested. Signal generators in all their forms are widely used within test and development systems, being used with other test instruments. When looking at what a signal generator is, it will be seen that they come in many forms - there are many signal generator types, each one being used to provide a different form of signal. Some provide RF signals, others audio signals, some can provide different shapes of waveform and others may provide just pulses. Signal generators have been used for many years.

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