Search results

• Xenon
  ...the gas is excited by [[Electric arc|electrical discharge]]. Xenon emits a band of [[Spectral line|emission lines]] that span the visual spectrum,<ref>{{ci |doi=10.1126/science.134.3471.15|title=A molecular theory of general anesthesia
  82 KB (11,842 words) - 21:02, 24 September 2010
• Guerrilla warfare
  ...a]] or other manuals of guerrilla warfare which a traditional guerrilla or band leader would regard as other than simple common sense. ===Foco theory===
  42 KB (6,147 words) - 21:57, 26 September 2010
• Bruce Edwards Ivins
  ...who was among the targets in the attack. While not outright rejecting the theory of Ivins' involvement, Leahy has asserted that "If he is the one who sent t ...k Jugglers.<ref name=wp/> He played keyboards in a [[Celtic music|Celtic]] band and would often compose and play songs for coworkers who were moving to new
  46 KB (6,888 words) - 17:23, 27 September 2010
• Prototype filter
  ===Lowpass to multi-band=== ...'''Filter bandforms''': see, [[low-pass]], [[high-pass]], [[band-pass]], [[band-stop]].]]
  15 KB (2,320 words) - 14:48, 10 December 2011
• Lattice phase equaliser
  ...name=Darlington>Darlington, S, "A history of network synthesis and filter theory for circuits composed of resistors, inductors, and capacitors", ''IEEE Tran ...high frequencies. That is, it is phase correction for the high end of the band. At low frequencies the phase shift is 0° but as the frequency increases t
  10 KB (1,512 words) - 14:48, 10 December 2011
• Bessel filter
  ...el]], a German mathematician (1784–1846), who developed the mathematical theory on which the filter is based. The filters are also called Bessel–Thomson ...ass Bessel filter. Note that the transition from the pass band to the stop band is much slower than for other filters, but the group delay is practically c
  6 KB (893 words) - 14:48, 10 December 2011
• Network synthesis filters
  ...rworth polynomials]], also due to Butterworth.<ref>Butterworth, S, "On the Theory of Filter Amplifiers", ''Wireless Engineer'', '''vol. 7''', 1930, pp. 536-5 ...wn ones are;<ref>Darlington, S, "A history of network synthesis and filter theory for circuits composed of resistors, inductors, and capacitors", ''IEEE Tran
  11 KB (1,738 words) - 14:48, 10 December 2011
• Bridged T delay equaliser
  It is required that T_D is constant at all frequencies over the band of operation. φ must therefore be kept linearly proportional to ω. With ...s of freedom]] in the design. It is required from [[image impedance|image theory]] (see [[Zobel network]]) that the L/C branch and the L'/C' branch are the
  5 KB (787 words) - 14:49, 10 December 2011
• Passive analogue filter development
  ...with [[transmission line]]s. Transmission line theory gave rise to filter theory, which initially took a very similar form, and the main application of filt ...ultiplexing]]. Network analysis was not yet powerful enough to provide the theory for more complex filters and progress was further hampered by a general fai
  60 KB (9,254 words) - 14:49, 10 December 2011
• Digital electronics
  ...potential|levels]], rather than by a continuous range. All levels within a band represent the same signal state. Relatively small changes to the analog sig ...te.<ref>Kleitz , William. (2002). Digital and Microprocessor Fundamentals: Theory and Application. 4th ed. Upper Saddler Reviver, NJ: Pearson/Prentice Hall</
  33 KB (4,939 words) - 14:49, 10 December 2011
• Quarter-wave impedance transformer
  ...thaei/> Filters incorporating λ/4 inverters are only suitable for narrow band applications. This is because the impedance transformer line only has the ==Theory of operation==
  7 KB (1,140 words) - 14:49, 10 December 2011
• Mechanical filter
  ...work analysis and filter design methods to mechanical filters. Electrical theory has developed a large library of mathematical forms that produce useful fil The theory of mechanical filters was first applied to improving the mechanical parts o
  52 KB (7,784 words) - 14:49, 10 December 2011
• Butterworth filter
  ...1930, pp. 536–541 - [http://www.gonascent.com/papers/butter.pdf "On the Theory of Filter Amplifiers"-S. Butterworth]</ref> ...of designer experience due to limitations of the [[image parameter filter|theory then in use]]. The filter was not in common use for over 30 years after its
  17 KB (2,648 words) - 14:50, 10 December 2011
• Crystal radio
  {{Redirect|Crystal set|the Australian rock band|The Crystal Set}} | journal = IEEE Transactions on Microwave Theory and Techniques
  73 KB (10,437 words) - 14:50, 10 December 2011
• Phase-locked loop
  *Phase-noise: Defined by noise energy in a certain frequency band (like 10kHz offset from carrier). Highly dependent on VCO phase-noise, PLL ...nificant minimum peak-to-peak [[jitter]], because of drift within the dead band.{{Citation needed|date=September 2010}} However these types, having outputs
  37 KB (5,933 words) - 14:50, 10 December 2011
• Mm'-type filter
  ...in image design theory are pictured in the diagram below. As always, image theory defines quantities in terms of an infinite cascade of [[two-port network|tw ...d. It is not possible to obtain an exact impedance match across the entire band. With two degrees of freedom it is only possible to match the impedance exa
  15 KB (2,296 words) - 14:50, 10 December 2011
• Superheterodyne receiver
  ...fier), a variable frequency [[local oscillator]], a [[frequency mixer]], a band pass filter and [[intermediate frequency]] (IF) amplifer, and a demodulator ...his is often built into a receiver, especially in the case of AM broadcast band radios. The output of the antenna may be very small, often only a few [[mic
  31 KB (4,651 words) - 14:50, 10 December 2011
• T pad
  ...e a flat [[frequency response]] attenuating all frequencies equally in the band they are intended to operate. The attenuator has the opposite task of an [ ...tance of the attenuator's elements can be calculated using image parameter theory. The starting point here is the [[image impedance]]s of the L section in f
  6 KB (931 words) - 14:50, 10 December 2011
• Composite image filter
  ...n of such sections. In this, the analysis parallels [[transmission line]] theory on which it is based. Filters designed by this method are called ''image p ...idered are stopband rejection, steepness of the filter skirt ([[transition band]]) and impedance matching to the filter terminations.
  21 KB (3,213 words) - 14:50, 10 December 2011
• Impedance matching
  == {{anchor|Explanation}}Theory == ...h the matching network was designed, reflections (in this narrow frequency band only) are also minimized. For the case of purely resistive source and load
  31 KB (4,821 words) - 14:50, 10 December 2011

View (previous 20 | next 20) (20 | 50 | 100 | 250 | 500)