[minima] Re: KISS Mixer Musings
- From: "Tayloe, Dan (NSN - US/Tempe)" <dan.tayloe@xxxxxxx>
- To: "minima@xxxxxxxxxxxxx" <minima@xxxxxxxxxxxxx>
- Date: Tue, 4 Mar 2014 03:42:50 +0000
That part looks nice. Low input/output C, good to at least 400 MHz, high Idss
(24 to 60 mA, lower turn on resistance), 25v drain to source rating. Pinchoff
voltage has kind of a high range (-2 to -6v).
It was interesting to see a typical "on" resistance near 50 ohms. That implies
that most other jfets are likely 2x or 3x this value due to a lower Idss. The
"on" resistance is likely why we are seeing 10 dB of conversion loss instead of
something closer to 6 dB.
- Dan
-----Original Message-----
From: minima-bounce@xxxxxxxxxxxxx [mailto:minima-bounce@xxxxxxxxxxxxx] On
Behalf Of ext Steve VK2SJA
Sent: Monday, March 03, 2014 4:45 PM
To: minima@xxxxxxxxxxxxx
Subject: [minima] Re: KISS Mixer Musings
> SST/U401 VGSth matched to within 5mv
I can't find that one.
Something like this?
http://www.nxp.com/documents/data_sheet/PMBFJ620.pdf
http://www.digikey.com.au/product-detail/en/PMBFJ620,115/568-2084-1-ND/812946
> On 28/02/2014 11:13 PM, Joe Street wrote:
>> Why not look for a monolithic pair? If they are fabricated on the
>> same substrate the characteristics should be well matched. I haven't
>> looked but surely there must be something off the shelf?
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