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Analog Electronics: Circuits, Systems and Signal Processing by David Crecraft, Stephen Gergely

By David Crecraft, Stephen Gergely

The content material has been rigorously designed to satisfy the necessities of first and moment yr scholars of digital engineering, communications engineering and telecommunications, following complete honours measure courses or two-year classes together with HNC/HND.

  • A thoroughly new analog electronics textbook for the electronic age
  • Coverage excellent for classes with a communications / instant focus

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Additional resources for Analog Electronics: Circuits, Systems and Signal Processing

Example text

The other, the high-pass type is given by VR in the RC circuit and by VL in the RL one. 20(c). Input (a) Low pass (b) + \/ High pass (c) Fig. Cand RL circuits. 2, one of the special properties of sinusoidal waveforms has been said to be that 'Any arbitrary waveform can be expressed as a sum (possibly of an infinite number) of sine waves of harmonically related frequencies'. The mathematician who first estabhshed this was Joseph Fourier who pubHshed his work in 1822, a few years before Faraday discovered electromagnetic induction.

The rise time tr of the output is defined as the time taken for the output to rise from 10% ^lo to 90% ^90 of the maximum value. 34. 82) RC and also the cut-off frequency/o = j ^ ^ ^^^ ^^^ ^^^ clearly related by / . 83) It is generally considered that a pulse length ^d of about three times the rise time t^ is required to transmit a pulse without undue distortion. This leads to the widely used rule of thumb that the minimum of t^ for an acceptable output pulse shape is the reciprocal of the cut-off frequency.

10 in a second. The number of cycles of repetition in a second is called the frequency/which is measured in units of hertz (Hz) or in some old fashioned texts cycles/second or c/s. 11) In a continuously changing sine wave (j) changes continuously by In radians per cycle. Since this takes place / times per second the rate of change of cj) is called the angular velocity, or angular frequency, co. 13) where the m term represents the change of (j) since t = 0. The 9 term, called the phase angle, represents the fact that the sine wave may not have started at (|) = 0 when r = 0 in the particular scale of time used here.

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