New design of full band differentiators based on Taylor series |
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Authors: | Khan IR Ohba R |
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Affiliation: | Div. of Appl. Phys., Hokkaido Univ., Sapporo; |
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Abstract: | The classical central difference approximations of the derivative of a function based on Taylor series are the same as type III maximally linear digital differentiators for low frequencies. A new finite difference formula is derived which can be implemented as a full band type IV maximally linear differentiator. The differentiator is compared with type III maximally linear and type IV equiripple minimax differentiators. A modification is proposed in the design to minimise the region of inaccuracy near the Nyquist frequency edge |
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