Film resistor with enhanced trimming characteristics

Details Film resistor with enhanced trimming characteristics Film resistor with enhanced trimming characteristics

1989-07-28

1991-05-14

Albritton, C. L.

Electrical resistors

Mechanically variable

Resistance value varied by removing or adding material

338 49, 21912169, H01C 1000

Patent

active

050159895

ABSTRACT:
A film resistor for use in electrical circuits, the resistor including a shunt conductor electrically connected in parallel with a portion of the resistive film, at a location spaced apart from the principal circuit conductor terminals of the resistor. The resistor is made with an intentionally low initial resistance, and is trimmed to a predetermined resistance by removal of a portion of the resistive material between the circuit conductor terminals. A plunge cut made in the resistive material by a trimmer and extending toward the shunt conductor can be used to provide a wide range of change of resistance without excessive increase of the rate of change of resistance as a function of extension of the plunge cut.

REFERENCES:
patent: 3889223 (1975-06-01), Sella et al.
patent: 4041440 (1977-08-01), Davis et al.
patent: 4551607 (1985-11-01), Moy

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