Impedance-compensated thick-film resistor

Details Impedance-compensated thick-film resistor Impedance-compensated thick-film resistor

1989-09-13

1990-04-24

Reynolds, Bruce A.

Electrical resistors

Particular configuration and/or dimension

338306, 338334, H01C 300, H01C 1012

Patent

active

049203290

ABSTRACT:
A thick film resistor (TFR) is provided that is capable of being compensated for impedance variations related to the TFR laser-trimming process. According to the invention, a thick film capacitor (TFC) metallization is provided in parallel with the thick film to compensate the RF impedance. A method is also provided for calculating the exact length of the TFC metallization necessary to compensate the RF impedance. Once this length (L) is known, the TFC metallization can be laser-trimmed to obtain the desired length.

REFERENCES:
patent: 3781610 (1973-12-01), Bodway
patent: 3895272 (1975-07-01), Smolko et al.
patent: 4464646 (1984-08-01), Burger et al.
patent: 4503418 (1985-03-01), Belopolsky
patent: 4766411 (1988-08-01), Prieto et al.

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