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'fet as resistor' for cartridge loading?
'fet as resistor' for cartridge loading?
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Old 4th February 2006, 03:02 PM   #1
Onvinyl is offline Onvinyl
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Location: Germany
Default 'fet as resistor' for cartridge loading?

AoE deals with the possiblity to use a jfet as a resistor. As it is so simple, why not use it as a (programmable) load resistor? Or will the sound quality suffer?
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Old 4th February 2006, 03:08 PM   #2
davidsrsb is offline davidsrsb  Malaysia
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1) calibration - the relationship between Vgs and Rds is very variable between samples and is temperature dependent
2) relatively noisy - Vgs noise becomes resistance variation
3) its another rf detector to pick up your gsm phone

The linearity is probably good enough at MC output levels
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