By Eric Chan
Product layout has replaced dramatically lately as every little thing, from pcs to microwaves to MP3 gamers, has develop into extra compact and extra strong. much less seems extra, as every thing turns into moveable and extra consumer pleasant. 1,000 Product Designs positive aspects the main leading edge designs in recent times. This unparalleled choice of items from everywhere in the globe is a window into assorted cultures and societies, that includes every thing from furniture to non-public goods and components to electronics.
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Additional info for 1,000 Product Designs: Form, Function, and Technology from Around the World (1000 Series)
The elliptic-function filter characteristic has equal-ripple variation in both the pass band and the stop band. It offers further improvement in the magnitude characteristic for a given order n. In fact, it has been shown that for a given Q p and a given Qs, the elliptic-function characteristic gives the lowest possible transition-band ratio, ws/wp , of all The approximation 40 lowpass magnitude characteristics. The structure of an elliptic-function filter is usually 'only slightly more complicated than a Butterworth or Chebyshev filter of the same order.
First, determine the value of Wa at which IH(jw)1 is a minimum in the pass band. Then determine A l , A 2 , wP ' and Ws. ,-L=--~ o~---~--~~----~~~------------~-------w l/wo Chapter 3 Network functions Once a magnitude characteristic has been chosen for a particular filter application, the next step is to determine a network function that not only has this magnitude characteristic, but is also realizable. By realizable, we mean that the function must be such that a workable network at least exists in theory, can be implemented with real-world components, and, barring unrealistic assumptions on these components, can be constructed and expected to perform the task accordingly.
When only zeros in the left halfplane are included in P(8), the H(s) will have the lowest phase at each frequency. The network function so formed is called the minimum-phase function. If right-halfplane zeros are included in P( 8), the network function is a nonminimum-pha8e function. 1. squared is Obtain the network function whose magnitude 1 A polynomial is Hurwitz if its zeros are all in the open left halfplane. This definition does not allow zeros to lie on the imaginary axis. In some limiting situations, simple zeros are allowed to lie on the imaginary axis.
1,000 Product Designs: Form, Function, and Technology from Around the World (1000 Series) by Eric Chan