| 摘要 |
A CMOS temperature sensor is provided to measure temperature with simple process and circuit by preventing complication of circuit according to the increase of sensing temperature. A CMOS temperature sensor comprises a current supply unit(200), a current mirror unit(330), and a differential amplifiers(350). The current supply unit generates a first current(I1) proportional to temperature. The current mirror unit outputs output current(Iout) by mirroring the first current. The differential amplifier receives n distribution voltages(V1,V2,V3) generated by the output current and control voltage(Vcon) which is free from temperature and outputs n output currents(Vout1,Vout2,Vout3). The differential amplifier detects temperature at which n distribution voltages have the same value as the control voltage, and outputs the output voltage differentially amplified above the detected temperature. The current mirror unit includes a current mirror(331) and a voltage distributor(341). The current mirror outputs the output current having the same value as the first current. The voltage distributor distributes the output end voltage of the current mirror by using the output current.
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