Thursday, March 11, 2010
What is a Function Generator
What is a function generator and this article will clarify you the basic definition of function generator. It is actually a test device or test software that is used to create electronic waveforms. in some cases, a type of triggering source is needed externally or internally to generate waveforms that can be in single-shot or repetitive. There are some types of function generator that create pink or white noise. Typically it provides 20 MHz in frequencies and utilizes a BNC connector, which usually requiring termination of 50 or 75 ohm. The specilized RF generators typically utilizes N-type output connectors and have the capability of gigahertz frequencies. Frequency range of a function generator determines the type if output connector from the device.
There is a type of function generator used to provides an output to some mathematical function of its input proportionally, which is known as sub-system. This type of device is utilized in analog computer system or feedback control systems. There are mor advanced types that uses DDS (Direct Digital Synthesis) in order to generate waveforms. Arbitrary waveform generators utilize Direct Digital Synthesis to create waveform which a table of amplitude values can describe.
There is analog function generator that commonly used to create output in a form of triangle wave. What happening is the triangle waveform is created when a capacitor is repeatedly charged and discharged by the analog function generator from a constant current source. Thereafter a descending anf ascending voltage ramp is generated linearly. A comparator is used to reverse the charge and discharge when the output voltgae rechaes lower and upper limit. Afterward the linear triangle wave is produced. Different frequencies are gained by varying the size and current of the capacitor.
Just like any other signal generators, a function generator might has an attenuator. Attenuator often has the capability to repetitively and automatically "sweep" the output waveform's frequency (by means of a voltage-controlled oscillator) between 2 operator-determined limits. It is various means of modulating the output waveform. The attenuator makes it easy to evaliate the required frequency response for any electronic circuit.
Noting helps to generate 50% duty cycle square wave whether the capacitor is discharged or charged. Thus resulting in the current switching comparator's output. Triangle wave can be converted into a reasonably sine wave accurately by non-linear diode shaping circuit that most of function generators have. What happen is the diode shaping circuit round off the hard corners of the trinagle wave, This process has similarity with clipping in audio systems.
There is a type of function generator used to provides an output to some mathematical function of its input proportionally, which is known as sub-system. This type of device is utilized in analog computer system or feedback control systems. There are mor advanced types that uses DDS (Direct Digital Synthesis) in order to generate waveforms. Arbitrary waveform generators utilize Direct Digital Synthesis to create waveform which a table of amplitude values can describe.
There is analog function generator that commonly used to create output in a form of triangle wave. What happening is the triangle waveform is created when a capacitor is repeatedly charged and discharged by the analog function generator from a constant current source. Thereafter a descending anf ascending voltage ramp is generated linearly. A comparator is used to reverse the charge and discharge when the output voltgae rechaes lower and upper limit. Afterward the linear triangle wave is produced. Different frequencies are gained by varying the size and current of the capacitor.
Just like any other signal generators, a function generator might has an attenuator. Attenuator often has the capability to repetitively and automatically "sweep" the output waveform's frequency (by means of a voltage-controlled oscillator) between 2 operator-determined limits. It is various means of modulating the output waveform. The attenuator makes it easy to evaliate the required frequency response for any electronic circuit.
Noting helps to generate 50% duty cycle square wave whether the capacitor is discharged or charged. Thus resulting in the current switching comparator's output. Triangle wave can be converted into a reasonably sine wave accurately by non-linear diode shaping circuit that most of function generators have. What happen is the diode shaping circuit round off the hard corners of the trinagle wave, This process has similarity with clipping in audio systems.
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