[sdiy] VCR - Voltage Controlled Resistor

[Scott Gravenhorst]

Ok, well I still have the H11F1 option, I've got a couple here that I can
use, but I will first try to get the best I can out of a 4007, since I really
would like to see that work if it can.  The H11F1 also eliminates the need
for a bastardized ground/powersupply thing, but the large signal spec seems
to suck for that one too, the V-I curve is linear only from about -50 mV to
+50 mV.  

I was hoping to be able to drive the filter with around 3 volts of input, but
it's not looking good for that.  Perhaps this is why the WASP uses an OTA...



"Theo" <t.hogers at home.nl> wrote:
>I experimented a bit with those but found other FET like the BF245 behave
>too similar to the special VCR FET to jump even half a inch.
>
>Could not find the home of Siliconix the gallier but he lives in Vishay now,
>thanks for the tip.
>The FET as VCR application note AN105 should be at the Vishay website.
>
>Theo
>
>----- Original Message -----
>From: Magnus Danielson <cfmd at bredband.net>
>To: <synth-diy at dropmix.xs4all.nl>
>Sent: Sunday, July 18, 2004 3:41 AM
>Subject: [sdiy] VCR - Voltage Controlled Resistor
>
>
>> Hi!
>>
>> There should be folks enjoying this!
>>
>> Vishay Siliconix has Voltage Controlled Resistors in their productrange.
>> Their VCR2N, VCR3N and VCR7N does this. They dynamics may not be much to
>jump
>> high for, but at least something.
>>
>> Cheers,
>> Magnus
>

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