Inline filter resistors

Details Inline filter resistors Inline filter resistors

2007-12-18

2007-12-18

Phu, Sanh D. (Department: 2618)

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

C455S073000, C455S307000

Reexamination Certificate

active

10815058

ABSTRACT:
A shorted resistive block formed in line with at least one trace of a plurality of a top metal layer includes a plurality of resistors with a removable shorting link coupled across the resistive block. The resistive block comprises one of a plurality of series coupled shorted resistors and a shorted plurality of parallel coupled resistors. If harmonic interference needs to be reduced, a short is removed and the resistive block is operably coupled to parasitic capacitance thereby creating an R-C filter. The real performance is re-evaluated after removing the short. If the re-evaluation determines a desired R-C filter value should be increased, the resistance of the resistive block is increased by opening a shorting link. In the series configured resistive block, resistance is increased by removing a short across a resistor. In the parallel configuration, the resistance is increased by cutting a removable link coupled in series with each resistor.

REFERENCES:
patent: 4142158 (1979-02-01), Belisomi
patent: 5894499 (1999-04-01), Katayama et al.
patent: 6111606 (2000-08-01), Ikeda
patent: 6172954 (2001-01-01), Masuda
patent: 6335656 (2002-01-01), Goldfarb et al.

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