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DrKnoerig77

Sine generation by an IIR filter approach on low-cost 8 bit MCU's

Status: Abgeschlossen
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62
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15. April 2013
Veröffentlicht
in Elektor | January 2015 | Zum Heft-Artikel...
SinusOszilloskop.JPG
This project describes the generation of sine waves by a simple recursive digital filter in a way that only 8 bit shift/add/subtraction operations, two permanently occupied 8 bit registers and no data tables are required, therefore permitting the usage of low-cost micro-controllers without multiplication units and little storage capacity. It contains the complete theory of this approach, the finding of suitable parameters under the constraint of 8 bit operations plus substitution of multiplications by shift operations and an example implementation on an ATtiny45 MCU.
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