Patent ID: 11892360
Assignee: STMICROELECTRON NTERNATIONAL N.V.
Field: Basic communication processes (Electrical engineering)
Classification: CPC G  H | IPC G  H

Claim 12:
13. The temperature sensing circuit of claim 12, wherein the switched capacitor circuit comprises:
a first variable capacitance used to sample and hold the base-emitter voltage of the fourth bipolar junction transistor, the first variable capacitance being comprised of a number γ of parallel connected capacitors of a same capacitance;
a second variable capacitance used to sample and hold the base-emitter voltage of the fifth bipolar junction transistor, the second variable capacitance being comprised of γ parallel connected capacitors of a same capacitance;
wherein γ is selected such that the curved non-linearity across temperature in the voltage complementary to absolute temperature is canceled out during integration of the difference between the base-emitter voltage of the fourth bipolar junction transistor and a sum of the voltage complementary to absolute temperature and the base-emitter voltage of the fifth bipolar junction transistor;
a third variable capacitance used to sample and hold the base-emitter voltage of the first bipolar junction transistor, the third variable capacitance being comprised of a number α of parallel connected capacitors of a same capacitance;
a first fixed capacitance used to sample and hold ground;
a second fixed capacitance used to sample and hold the base-emitter voltage of the third bipolar junction transistor; and
a fourth variable capacitance used to sample and hold the base-emitter voltage of the second bipolar junction transistor, the fourth variable capacitance being comprised of α parallel connected capacitors of a same capacitance.