jfet

Good, people are still introducing jfets.

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Good Gm, 15 cents, and "low noise", whatever they mean by that.

--
John Larkin         Highland Technology, Inc 

lunatic fringe electronics
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John Larkin
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Huh, designed for AM/FM radio, how big is that market? George H.

Reply to
George Herold

** About 80 million units per year, one in each new car.

.... Phil

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Phil Allison

George H. "

There is another thing or two they can do that no other semiconductor will.

Reply to
jurb6006

Anything for consumer equipment has the potential to be massive.

Lots of linear ICs have faded over the decades, especially communication type devices, but the ICs intended for consumer am/fm radios seem to have fairly long staying power. Especially since they often aren't seen in hobby circles.

I suppose AM/FM radios are dwindling now, but certainly they've been a big thing in the past. In the old days, car radios used to bring the antenna to the top of a tuned circuit, a very high impedance point. But the car radios of more recent design that I've looked at used an "active antenna" type circuit, use an FET to provide a high impedance load to the whip antenna, and then transform it down to a lower impedance. So that has to be common to most car radios, at least up to recent times.

It is changing, my Sansa Fuze MP3 player is about 7 years old, if not older, and it can't have a traditional radio inside, there's not enough room. So I'm assuming an IC intended for the purpose of AM/FM radio, and probably turning to digital process somewhere along the line. And it's a pretty good receiver. And since portable shortwave receivers have been going that way for most of a decade now, I assume car radios and many a portable am/fm radio are going that way, a single IC for the purpose and not many external components. Not sure they'd need jfets, but maybe they still need it for the "active antenna".

Michael

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Michael Black

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