[sdiy] JFET as VCR

Aaron Lanterman lanterma at ece.gatech.edu
Sat Aug 27 21:36:22 CEST 2005


On Sat, 27 Aug 2005, Scott Gravenhorst wrote:

> I've played with MOSFETs from a 4007 for VCR use, also the H11F1.  I
> couldn't apply more than 100 mv of AC signal without distortion, using
> either method.

Here's an interesting article on dropping in a couple of resistors to help 
with linearity:

http://graffiti.virgin.net/ljmayes.mal/comp/vcr.htm

It looks like one limitation though is that, as described by the author, 
it seems to want to keep one of the ends of the "VCR" at a fixed voltage 
(like gounded.)

- Aaron



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