Field device electrostatic discharge protective circuit

Details Field device electrostatic discharge protective circuit Field device electrostatic discharge protective circuit

1999-02-09

2000-08-01

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Amplitude control

327313, 327314, 327324, 361 56, H03K 508

Patent

active

060972351

ABSTRACT:
A field device electrostatic discharge protective circuit is described. The field device electrostatic discharge protective circuit comprises an N-type FET, an NMOS, an impedance device and a resistor. The gate and the drain of the N-type FET connect to the input port. The drain of the NMOS connects to the internal circuit. The source of the NMOS connects to ground. The gate of the NMOS connects to the source of the N-type FET. The impedance device is set between the source of the N-type FET and the ground. The resistor is set between the drain of the N-type FET and the drain of the NMOS.

REFERENCES:
patent: 4605980 (1986-08-01), Hartranft et al.
patent: 5155396 (1992-10-01), Maloberti
patent: 5565790 (1996-10-01), Lee
patent: 5701124 (1997-12-01), Watt
patent: 5729420 (1998-03-01), Joung
patent: 5959488 (1999-09-01), Lin et al.

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