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  2. Smith chart - Wikipedia

    en.wikipedia.org/wiki/Smith_chart

    Using the Smith chart, the normalised impedance may be obtained with appreciable accuracy by plotting the point representing the reflection coefficient treating the Smith chart as a polar diagram and then reading its value directly using the characteristic Smith chart scaling. This technique is a graphical alternative to substituting the values ...

  3. CircuitMaker - Wikipedia

    en.wikipedia.org/wiki/CircuitMaker

    CircuitMaker is electronic design automation software for printed circuit board designs, for the hobby, hacker, and maker community. [1] [2] CircuitMaker is available as freeware, and the hardware designed with it may be used for commercial and non-commercial purposes without limitations. [3]

  4. Trainwreck Circuits - Wikipedia

    en.wikipedia.org/wiki/Trainwreck_Circuits

    All amps are individually made: "it's possible that no two Trainwreck amplifiers actually have the exact same circuit". They are usually equipped with three 12AX7 preamp tubes. [10] Fischer made three kinds of models: Express; two EL34 or two 6V6 output tubes. Two 12AX7 preamp tubes and one 12AX7 phase inverter. (Highest-gain amplifier in the ...

  5. List of 7400-series integrated circuits - Wikipedia

    en.wikipedia.org/wiki/List_of_7400-series...

    The following is a list of 7400-series digital logic integrated circuits.In the mid-1960s, the original 7400-series integrated circuits were introduced by Texas Instruments with the prefix "SN" to create the name SN74xx.

  6. 7400-series integrated circuits - Wikipedia

    en.wikipedia.org/.../7400-series_integrated_circuits

    An integrated circuit made in CMOS is not a TTL chip, since it uses field-effect transistors (FETs) and not bipolar junction transistors (BJT), but similar part numbers are retained to identify similar logic functions and electrical (power and I/O voltage) compatibility in the different subfamilies.

  7. Kagi chart - Wikipedia

    en.wikipedia.org/wiki/Kagi_chart

    An example Kagi chart. The Kagi chart (Japanese: かぎ足, romanized: kagiashi) is a chart used for tracking price movements and to make decisions on purchasing stock. It differs from traditional stock charts such as the Candlestick chart by being mostly independent of time. This feature aids in producing a chart that reduces random noise.

  8. 7000-series (CTA) - Wikipedia

    en.wikipedia.org/wiki/7000-series_(CTA)

    Each 7000-series rail car features 37 to 38 seats, and is a hybrid of the 3200-series and 5000-series. [8] The 7000-series train cars are equipped with AC propulsion; interior security cameras, interior readouts, interior maps GPS, glow-in-the-dark evacuation signs, operator-controlled ventilation systems. AC propulsion allows for smoother ...

  9. Circuit City - Wikipedia

    en.wikipedia.org/wiki/Circuit_City

    Circuit City Corporation, Inc., formerly Circuit City Stores, Inc., is an American consumer electronics retail company, which was founded in 1949 by Samuel Wurtzel as the Wards Company, operated stores across the United States, and pioneered the electronics superstore format in the 1970s.