Dr. Joachim Koenen (WITec GmbH)
Dr. Joachim Koenen (WITec GmbH)
Dr. Joachim Koenen (WITec GmbH)
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B: CPU/DSP Solution<br />
V1<br />
ADC1<br />
alphaControl<br />
Logic<br />
V2<br />
ADC2 Logic<br />
Advantages:<br />
● Very Flexible<br />
● Gain, Factors possible<br />
● Complex Operations<br />
Possible<br />
● Digital Data<br />
● Computer Control<br />
DAC<br />
C: Programmed Logic Solution (FPGA)<br />
V1<br />
ADC1<br />
alphaControl<br />
V2<br />
ADC2<br />
Programmable<br />
Logic (FPGA)<br />
V1- V2<br />
Logic<br />
Address<br />
Data<br />
CPU/<br />
DSP<br />
Disadvantages:<br />
● Slow<br />
● ADC, DAC need logic<br />
● Buses are bottlenecks<br />
● Collisions on bus<br />
● Step by step processing<br />
DAC<br />
V1- V2<br />
Both ADCs and the DAC are permanently connected with the FPGA<br />
Part of the FPGAs logic calculates the difference permanently within<br />
a few cycles<br />
33
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