Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – Unwanted signal suppression
Reexamination Certificate
2006-02-07
2006-02-07
Le, Dinh T. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
Unwanted signal suppression
C327S552000, C327S559000
Reexamination Certificate
active
06995606
ABSTRACT:
A high pass filter comprising a combination of capacitors and insulated gate field effect transistors (IGFETs) used as effective resistors provides a low break frequency, while providing improved linearity and a stable break frequency over a relatively wide range of input voltages. The high pass filter can be realized with a small physical size. In one particular embodiment, the small physical size allows the capacitors and the IGFET devices to be integrated together onto a common substrate.
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Bilotti Alberto
Romero Hernan D.
Allegro Microsystems Inc.
Daly, Crowley, Mofford & Durkee,LLP
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