Low capacitance differential input pad with common mode...

Details Low capacitance differential input pad with common mode... Low capacitance differential input pad with common mode...

2007-01-30

2007-01-30

Sircus, Brian (Department: 2836)

Electricity: electrical systems and devices

Safety and protection of systems and devices

Load shunting by fault responsive means

C361S111000

Reexamination Certificate

active

10357044

ABSTRACT:
An input pad for a differential current input to an integrated circuit contains a switchable and tunable input impedance. The input pad also contains ESD protection and common mode rejection while maintaining low capacitance. The common mode rejection comprises two resistors that combine to remove the common mode current from the two input lines, produce a reference current, and drive two output transistors that cancel the common mode current from the outputs.

REFERENCES:
patent: 4158863 (1979-06-01), Naylor
patent: 6643540 (2003-11-01), Yonce
patent: 6734702 (2004-05-01), Ikeoku et al.

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