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US 11,530,954 B2Granted
On-chip temperature sensor circuits
AssigneeSkyworks Solutions, Inc.
InventorLui Lam
Life of this patent
Estimating the term…
Abstract
A diode voltage from a diode circuit can be combined with a proportional to absolute temperature (PTAT) voltage generated by a PTAT circuit to determine a temperature sensor voltage. This temperature sensor voltage may correspond to a temperature of a circuit or a localized temperature. By determining the temperature sensor voltage using a combination of a PTAT voltage and diode voltage, it is possible to remove or a PTAT circuit used to generate a bandgap voltage, which may shrink the temperature sensor and increase the accuracy of the temperature sensor circuit.
Claims20
A temperature sensor comprising:
- a voltage generator circuit including a diode circuit and a proportional to absolute temperature circuit, the diode circuit being configured to generate a diode voltage, and the proportional to absolute temperature circuit being configured to generate a proportional to absolute temperature voltage;
- a first scalar circuit configured to weigh the diode voltage to obtain a weighted diode voltage;
- a second scalar circuit configured to weigh the proportional to absolute temperature voltage to obtain a weighted proportional to absolute temperature voltage;
- and
- a combiner configured to combine the weighted diode voltage and the weighted proportional to absolute temperature voltage to obtain a temperature sensor voltage.
2 more elements
A front-end module comprising:
- a power amplifier module configured to amplify a transmit signal;
- and
- a temperature sensor that includes a voltage generator circuit, a first scalar circuit, a second scalar circuit, and a combiner, the voltage generator circuit including a diode circuit and a proportional to absolute temperature circuit, the diode circuit being configured to generate a diode voltage, the proportional to absolute temperature circuit being configured to generate a proportional to absolute temperature voltage, the first scalar circuit being configured to weigh the diode voltage to obtain a weighted diode voltage, the second scalar circuit being configured to weigh the proportional to absolute temperature voltage to obtain a weighted proportional to absolute temperature voltage, the combiner being configured to combine the weighted diode voltage and the weighted proportional to absolute temperature voltage to obtain a temperature sensor voltage, and the temperature sensor being in electrical communication with the power amplifier module and configured to supply a bandgap voltage generated by the voltage generator circuit to the power amplifier module.
A wireless device comprising:
- a front-end module including a power amplifier module configured to amplify a signal to obtain an amplified signal, and a temperature sensor that includes a voltage generator circuit, a first scalar circuit, a second scalar circuit, and a combiner, the voltage generator circuit including a diode circuit and a proportional to absolute temperature circuit, the diode circuit being configured to generate a diode voltage, the proportional to absolute temperature circuit being configured to generate a proportional to absolute temperature voltage, the first scalar circuit being configured to weigh the diode voltage to obtain a weighted diode voltage, the second scalar circuit being configured to weigh the proportional to absolute temperature voltage to obtain a weighted proportional to absolute temperature voltage, the combiner configured to combine the weighted diode voltage and the weighted proportional to absolute temperature voltage to obtain a temperature sensor voltage, the temperature sensor being in electrical communication with the power amplifier module and configured to supply a bandgap voltage generated by the voltage generator circuit to the power amplifier module;
- and
- and an antenna in communication with the front-end module and configured to transmit the amplified signal.
Dependencies are inferred from the claim text.