DSP function generator

No electronics workshop or laboratory is complete without a function generator. The one described in this article is off the beaten track because it is not a stand-alone box with the usual set of controls on the front panel. Rather, it is an insertion card for PCs, and entirely controlled by software. The heart of the generator is a digital signal processor (DSP) chip from Analog Devices. The card is controlled by a 'plain DOS' or a Windows program supplied to you on disk, The Windows version even allows you to create your own waveshapes!