on video Introduction to Function Generator - Analog and Digital Instruments


A function generator is one of the most useful devices in the electronic domain. In modern-day, electrical terminology, troubleshooting is the most important concept and the under analysis needs multiple controllable signals to simulate the normal functionality. This requirement is easily resolved by a function generator where they can provide various kinds of signals.

The first function generator was designed by Robert Brunner where is a minimal frequency device and aimed fundamentally at geographical analysis, servo testing, and vibration observations. Today, this article is going to explain function generators working, circuitry, types, and their benefits.

What is Function Generator?
A function generator is generally termed as a signal generator that gives multiple kinds of output waveforms (sine, square, sawtooth, and others) based on the input signal. The device also provides the option of adjusting frequency ranges between a few Hz to some 100KHz. This instrument is considered as so versatile because it provides various types of waveforms with different frequency ranges. The other feature of a function generator is its ability to offer variation in the shape of the wave, magnitude, offset, and frequency whereas a load is necessary before doing the adjustment.

In addition to adjusting the waveform characteristics, the device also adds an offset DC to the signal. In general, function generators function at minimal frequency levels whereas expensive models might function at high-frequency ranges.

Also, phase locking is another feature provided by the instrument which corresponds that one function generator is employed for phase locking the other function generator and the resultant signals can be adjusted in phase by a variable amount. Apart from phase locking, one function generator can also be phase-locked to the harmonics of other function generators. By varying the amplitude and phase of the harmonics, any kind of signal might be generated by the addition of the base frequency of one device with the resultant harmonic of other devices.

Block Diagram & Its Working
This section explains the block diagram of the function generator along with its working. Below is the block diagram picture:

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