Function Generator Block Diagram - Explanation | New Topic

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In this note, we are going to learn about Function Generator Block Diagram - Explanation. Welcome to Diploma to Degree, an ultimate solution for diploma and degree engineering notes.

Author Name: Arun Paul.   

Function Generator Block Diagram with Explanation - diploma to degree

What is Function Generator?

A function generator is an electrical test equipment that generates a wide range of waveforms, such as sine, square, triangle, and sawtooth, at various frequencies.  It is commonly used to design, test, and troubleshoot electrical circuits.

Specifications of Function Generators

  • The frequency range typically from few Hz to several MHz.
  • Sine, square, triangular, sawtooth, and pulse waveforms are generated by this signal generator.
  • It has adjustable voltage output, typically from a few millivolts to several volts.
  • Output impedance, generally around 50 Ohm.
  • AM, FM, or PM modulation technique are used for advanced function generators.
  • It allows frequency variation over a period for testing.

Function Generator Block Diagram with Explanation

Here's the block diagram of the function generator -

  • Frequency Control Network: The frequency control network determines the function generator's oscillation frequency. It consists of an external frequency control element, often a variable resistor or capacitor, which controls the rate at which the integrator charges and discharges. Users can use this control to alter the frequency of the output waveforms. The current sources and capacitors in the integrator circuit are primarily responsible for frequency regulation.
  • Upper and Lower Contact Current Sources: Upper and Lower Contact Current Sources: The Upper and Lower Constant Current Sources generate the majority of the triangle waveform. The higher current source provides a constant current to charge the capacitor in the integrator, resulting in a linear voltage increase. Similarly, the lower current source produces reverse current, which discharges the capacitor and causes a linear decline in voltage. These current sources ensure that the waveform remains steady and symmetrical throughout time.

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