The Special Use of Signal Generator

Published:2011/6/14 4:06:00 Author:Amy From:SeekIC

Signal generator is used to produce oscillator signal with its characteristics parameters controllable. It is easy to simulate different signals in various conditions, which is of great significance for product R&D and circuit experiment. Here we are going to discuss the principle, category, applications and other basic knowledge of signal generator to introduce how to use signal generator. Meantime, collect numerous questions about its practice from many engineers to help them have more clear knowledge about the signal generator. Thus, make signal generator better perform and make sure R&D and testing process in good condition.
　　
The signal generated from signal generator is usually replaced for front-end circuit real signal and offers ideal signal for back-end circuit. In the process of circuit testing, if the functions and features of signal process circuit meets the requirement of design can be seen via testing and input and output signal comparison. High-precision signal generator also can be used as standard signal source (reference source) and instrument to be calibrated in the area of measurement and calibration.
　　
Despite current signal generator has more complex structure than former simple one, the function unit of general basic structure is the same.
　　
Signal generator is mainly composed of frequency generation unit, modulator unit, buffer amplifier unit, attenuation output unit, display unit and control unit.

　
Main vibration level produces low-frequency sine oscillating signal which is amplified by voltage to meet the demand of voltage output range and then outputs voltage directly through output attenuator. OSC regulator potentiometer is used to adjust the output voltage.

The former signal generator usually adopts analogy circuit, but modern ones more and more adopt digital circuit and single chip control. The internal structure occur great change.

One of major feature of signal generator is that it can control output signal range whose preset output range determined by attenuator with certain combination decrement. The former attenuator is mechanic type reading out decrement or output range via scale. Current attenuator unit of high-grade signal generator is switched through single chip control relay. The related integrated circuit is MC206.

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