Looking for 1kpcs of MK484
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From: Phil Allison on 19 Dec 2009 21:02 "Joey.G" > > Is the AM radio receiver ICMK484(aka AN414) still in production? Where as the MK484 requires only s tuned circuit to select the frequency. I'm trying work out a way to use a MK484 on a set frequency with minimal drift across operating temp. ** Since the MK484 has no local oscillator or IF amplifier, it does not suffer from drift. A ferrite rod antenna typically has a low enough Q factor to not need retuning with temperature changes of the ordinary kind. The chip only works across the AM band, plus a bit each end, you know. Sounds to me like you are doing something quite daft with it. ..... Phil
From: Joe G (Home) on 20 Dec 2009 08:59 "Phil Allison" <phil_a(a)tpg.com.au> wrote in message news:7p5eugF17lU1(a)mid.individual.net... > > "Joey.G" > >> > Is the AM radio receiver ICMK484(aka AN414) still in production? > > Where as the MK484 requires only s tuned circuit to select the > frequency. > > I'm trying work out a way to use a MK484 on a set frequency with > minimal drift across operating temp. > > > ** Since the MK484 has no local oscillator or IF amplifier, it does not > suffer from drift. > > A ferrite rod antenna typically has a low enough Q factor to not need > retuning with temperature changes of the ordinary kind. > > The chip only works across the AM band, plus a bit each end, you know. > > Sounds to me like you are doing something quite daft with it. > > > > .... Phil > Thanks for your comments on the drift of the ant coil that is incrraging. I've been checking out data on 0805 npo 1% cap's they seem quite stable also. One mans daft idea is another mans brilliant idea. Joe
From: Leon on 20 Dec 2009 17:24
On 18 Dec, 14:52, "Joe G \(Home\)" <jo...(a)optusnet.com.au> wrote: > Hi All, > > Is the AM radio receiver IC MK484 (aka AN414) still in production? > > Are there any other alternatives? > > Regs > Joey Just design a simple TRF receiver with a couple of transistors. Leon |