Patent ID: 6198337
Filing Date: 2001-03-06
Classification: H01L,H03B

Abstract:
a semiconductor device for outputting a reference voltage which varies with ambient temperature, comprising:at least one depletion MOS transistor having an overall conductivity coefficient K.sub.DO and gate and source electrodes which are connected together, andat least one enhancement MOS transistor having an overall conductivity coefficient K.sub.EO and gate and drain electrodes which are connected together,wherein a total number of said depletion and enhancement MOS transistors is at least three,wherein at least one depletion MOS transistor and at least one enhancement MOS transistor are connected in series, and wherein;when a voltage source is connected between a drain electrode of at least one of said depletion MOS transistors and a source electrode of at least one of said enhancement MOS transistors, a predetermined reference voltage is output from an intermediate connection point, andwherein means are provided for varying at least one of said overall conductivity coefficients in order to provide said predetermined reference voltage with a desired temperature characteristic.