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  2. List of electronic component packaging types - Wikipedia

    en.wikipedia.org/wiki/List_of_electronic...

    Low-profile quad flat-package : 1.4 mm high, varying sized and pins on all four sides; Plastic quad flat-pack , a square with pins on all four sides, 44 or more pins; Ceramic quad flat-pack : similar to PQFP; Metric quad flat-pack : a QFP package with metric pin distribution; Thin quad flat-pack , a thinner version of LQFP

  3. Passthrough (electronics) - Wikipedia

    en.wikipedia.org/wiki/Passthrough_(electronics)

    VCRs, DVD recorders, etc. act as a "pass-through" for composite video and S-video, though sometimes they act as an RF modulator for use on Channel 3. Tape monitor features allow an AV receiver (sometime the recording device itself) to act as a "pass-through" for audio.

  4. Analog passthrough - Wikipedia

    en.wikipedia.org/wiki/Analog_passthrough

    Analog passthrough is a feature found on some digital-to-analog television converter boxes. Boxes without the analog passthrough feature only allow older, analog-only TVs to view digital TV. Those with analog pass-through allow both digital and analog television to be viewed on older TVs.

  5. Polar modulation - Wikipedia

    en.wikipedia.org/wiki/Polar_modulation

    Polar modulation was originally developed by Thomas Edison in his 1874 quadruplex telegraph – this allowed 4 signals to be sent along a pair of lines, 2 in each direction. Sending a signal in each direction had already been accomplished earlier, and Edison found that by combining amplitude and phase modulation (i.e., by polar modulation), he ...

  6. Passthrough device - Wikipedia

    en.wikipedia.org/wiki/Passthrough_device

    A passthrough device is a device used in conjunction with a computer to reprogram vehicle control modules through the OBD-II/CANbus port. [1] Each manufacturer has their own type, but SAE International standardized the J-2534 universal requirements in 2004, requiring all manufacturers to allow vehicles sold in the United States of America and Europe to accept powertrain reprogramming through ...

  7. Multiple patterning - Wikipedia

    en.wikipedia.org/wiki/Multiple_patterning

    A more serious concern was the effect of feature-to-feature positioning errors (overlay). Consequently, the self-aligned sidewall imaging approach (described below) has succeeded this approach. A "brute force" approach for patterning trenches involves a sequence of (at least) two separate exposures and etchings of independent patterns into the ...

  8. Pass transistor logic - Wikipedia

    en.wikipedia.org/wiki/Pass_transistor_logic

    Pass transistor logic often uses fewer transistors, runs faster, and requires less power than the same function implemented with the same transistors in fully complementary CMOS logic. [ 3 ] XOR has the worst-case Karnaugh map —if implemented from simple gates, it requires more transistors than any other function.

  9. Olympus OM-4 - Wikipedia

    en.wikipedia.org/wiki/Olympus_OM-4

    Frontal view of an OM-4 camera body, without lens attached Top view of an OM-4 camera body, showing controls. The OM-4 used a horizontal cloth focal plane shutter with a manual speed range of one second - 1/2000 second (up to 240 seconds was possible in automatic mode), plus bulb and flash X-sync of 1/60 second. Unlike most SLRs of the era, the ...