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Analog and Digital Filter Design, Second Edition (EDN Series by Steve Winder

By Steve Winder

Not like so much books on filters, Analog and electronic filter out layout doesn't begin from a place of mathematical complexity. it's written to teach readers tips to layout powerful and dealing digital filters. The history info and equations from the 1st variation were moved into an appendix to permit more uncomplicated circulation of the textual content whereas nonetheless offering the knowledge in the event you have an interest.

The addition of questions on the finish of every bankruptcy in addition to digital simulation instruments has allowed for a more effective, ordinary text.

  • Provides a realistic layout consultant to either analog and electronic digital filters
  • Includes digital simulation tools
  • Keeps heavy arithmetic to a minimum

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Extra info for Analog and Digital Filter Design, Second Edition (EDN Series for Design Engineers)

Example text

125ms. 025 ms more than the 1 kHz signal. The consequence of a nonconstant group delay can be seen when pulses are applied to the filter input. Pulses contain signal harmonics several times the fundamental frequency of the pulse. As these harmonics propagate through the filter, they each experience different delays. Summing the delayed fundamental and harmonic signals results in slowly rising and falling pulse edges and causes ripple on top of the pulse. This distortion can produce errors when subsequent circuits process the pulse.

Each coetficient is then multiplied by the chosen window function. If a highpass, bandpass, or bandstop filter is required. frequency scaling equations are also used to convert the response from the lowpass prototype. The design of Infinite Impulse Response (IIR) filters are based on analog designs. The signal paths are arranged so that the output depends on both the input signal and the output signal. Input signals are fed into a delay line. and multiplying factors are used in the same way as in FIR filters to provide a feedforward source.

The reactance of the series element is increasing while that of the shunt element is reducing, so the rate of increase in attenuation is doubled compared to it simple resistor-capacitor (RC) or resistor-inductor (RL) filter. At frequencies significantly above the passband. the rate of increase in attenuation with frequency is 12dB/octave. Also the phase shift is doubled; it is 90" at the cutoff frequency and rises to a maximum of 180" at very high frequencies. Note that the simple LC network is actually a series tuned circuit.

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