Mostrode: a mosfet approach to the triode 3/2 law

Notes on a mosfet approach to the triode 3/2 law and triode type characteristics

In 1938 Schade proposed a mechanism to transform a pentode tube into a triode by connecting the plate to the grid using a resistor network. Here is the graphs from his work "Beam Power tubes" by O. H. Schade, March 1938.

"Beam Power tubes" by O. H. Schade, March 1938

The same can be done with JFETs. Let us take a BS170 (http://www.fairchildsemi.com/ds/BS/BS170.pdf‎) MOSFET. I'm using TINA-TI for the simulations. Here is the schem for the simulation

The next graph shows the drain current as a function of drain voltage for various values of the gate voltage (from 6V - upper curve, to 0V).

The relation between the drain current and the gate-to-source voltage is $latex2png equation$ where Vth is the turn on threshold voltage and it has the typical value of 2.1V.

Palavras chave/keywords: guitar, diy, mosfet, triode, emulation, 3/2,

Criado/Created: NaN

Última actualização/Last updated: 04-10-2021 [18:00]

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