Arbitrary Waveform Generator Diagram

A common awg block diagram a closer look at each arbitrary waveform generator awg functional block 1.

Arbitrary waveform generator diagram.

These arbitrary waveform generators are generally more flexible although they do have some limitations not possessed by the dds versions. Otherwise it will be rotated by a fixed angle. The basic architecture of this unit employs a field programmable gate array fpga and a high speed and high. This is a generator with two independent output channels which is a nice feature for stimulating two systems simultaneously.

Dac sleep is driven directly by a microcontroller gpio. An arbitrary waveform generator awg is a piece of electronic test equipment used to generate electrical waveforms. A dds function generator is a digital arbitrary waveform generator meaning it uses a digital to analog converter dac to build a signal. I have 4 7 µf and 0 1 µf decoupling caps for each power ground pair.

The memory is clocked at the highest sampling rate supported by. The word arbitrary denotes a user s ability to create waveforms beyond the permanent contents of the instrument s internal memory. It also has read only memory rom where it stores amplitude values for specific waveforms at various time intervals based on a sampling frequency fs. Signal generators are subdivided into categories that include arbitrary function generators afgs and arbitrary waveform generators awgs.

These waveforms can be either repetitive or single shot once only in which case some kind of triggering source is required internal or external. The resulting waveforms can be injected into a device under test and analyzed as. A function generator with the ability to generate arbitrary waveforms is the b k 4078 as shown in the picture below. Dds frequency synthesizer as used in an arbitrary function generator afg the operation of the dds within the arbitrary function generator can be envisaged by looking at the way that phase progresses over the course of one cycle of the waveform.

The basic block diagram of the dds based arbitrary waveform generator is shown below. A digital representation of a waveform is loaded into awg memory through a variety of software applications such as matlab labview visual studio plus ivi and scpi. In this model the two channels share a 4 10 5 byte memory for defining the arbitrary waveforms. Abstract we are developing an arbitrary waveform generator awg to provide enhanced capability for radar applications.

The hdawg arbitrary waveform generator is capable of producing various digital modulation patterns such as qam ask and psk. Here is the dac portion of my arbitrary waveform generator. Diagram taken from the datasheet. Variable clock arbitrary waveform generator the variable clock arbitrary function generator is the more flexible form of arbitrary waveform generator.