Temperature-compensated semiconductor resistor device

摘要

A semiconductor device includes: a resistance R whose resistance value varies in response to a substrate temperature variation; a resistance corrector that is coupled in series with the resistance R and switches its resistance value by a preset resistance step width to suppress a resistance value variation of the resistance R; a first voltage generator for generating a first voltage that varies in response to the substrate temperature; a second voltage generator for generating second voltages Vf1 to Vfn−1 for specifying the first voltage at a point when a switching operation of the resistance value of the resistance corrector is performed; and a resistance switch unit for switching the resistance value of the resistance corrector by comparing the first voltage and the second voltages Vf1 to Vfn−1.

主权项

1. A temperature-compensated semiconductor resistor device, comprising:
a primary resistor having a resistance value which varies in response to a variation of a substrate temperature; a resistance corrector that is coupled in series with the primary resistor and having a corrected resistance value which is switched by a preset resistance step width so that a variation of the resistance value of the primary resistor in response to a variation of the substrate temperature may be suppressed; a first voltage generator generating a first voltage that varies in response to the substrate temperature; a second voltage generator generating a plurality of second voltages, each of the second voltages specifying a voltage level at which the first voltage causes a switching operation of the corrected resistance value of the resistance corrector to be performed; and a resistance switch unit switching the corrected resistance value of the resistance corrector in response to comparing the first voltage and each of the second voltages, wherein: the primary resistor and resistance corrector together provide a temperature-compensated resistance.