Back to results
US 8,330,199 B2Granted
Semiconductor device having resistors with a biased substrate voltage
AssigneeRenesas Electronics Corporation
InventorsMasaomi Kamakura, Toshio Kumamoto, Takashi Okuda
Life of this patent
Estimating the term…
Abstract
To eliminate the substrate voltage dependences of the respective resistance values of resistor elements, in the resistor elements coupled in series to each other over respective substrate regions, the ends of the resistor elements are coupled to the corresponding substrate regions by respective bias wires such that respective average potentials between the substrate regions of the resistor elements and the corresponding resistor elements have opposite polarities, and equal magnitudes.
Claims16
A semiconductor device comprising:
- a plurality of resistor elements formed over respective substrate regions each via an insulating film, and coupled in series to each other;
- at least one bias wire electrically coupling one end of each of the plurality of resistor elements to one of the substrate regions corresponding thereto,
- an operational amplifier which amplifies a signal applied thereto;
- and input resistor which transmits the applied signal to an input of the operational amplifier;
- and
- a feedback resistor which feedbacks a signal from an output of the operational amplifier to the input,
- wherein the bias wire is arranged such that respective voltages between a pair of resistor elements of the plurality of resistor elements, which are coupled in series to each other, and the respective substrate regions corresponding thereto have opposite polarities,
- wherein the plurality of resistor elements include resistor elements forming the input resistor and resistor elements forming the feedback resistor, and
- wherein the bias wire is provided for each of a series-coupled resistor of the resistor elements forming the input resistor and a series-coupled resistor of the resistor elements forming the feedback resistor.
6 more elements
Dependencies are inferred from the claim text.