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Discretes in cheap designs (EDN mag)

Discussion in 'General Electronics Discussion' started by KrisBlueNZ, Oct 3, 2012.

  1. KrisBlueNZ

    KrisBlueNZ Sadly passed away in 2015

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    Nov 28, 2011
    Discretes in cheap designs - EDN magazine

    Martin Tomasz

    "As part of my job at Touchstone Semiconductor, I’ve been doing some teardowns of consumer products recently—and from time to time I’m still finding lots of discretes in the analog portion of those designs. A wireless door chime revealed a single-layer, low-tolerance PCB with a forest of TO-92 transistors, diodes, and resistors. The super-regenerative radio-receiver portion had the usual transistor plus potted coils and caps, but there was a surprising number of discretes as part of the low-frequency analog circuitry, too...."

    http://www.edn.com/electronics-blog...97367/Discretes-in-cheap-designs?cid=EDNToday
     
  2. Harald Kapp

    Harald Kapp Moderator Moderator

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    Nov 17, 2011
    If you can reliaze the function with a handful of discretes and you have cheap workers, why not? It's surely cheaper for those manufacturers, other wise they wouldn't do it this way. As an aside: How long will the highly integrated circuit be supplied? If a simple transistor is discontinued you will probably very easily find a pin compatible substitute.
     
  3. BobK

    BobK

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    Jan 5, 2010
    Or perhaps they just have an old design and no one capable of updating it.

    Bob
     
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