Temperature correction for radio-frequency circuits
In some embodiments, a radio-frequency system can include a die having a semiconductor substrate and including a radio-frequency circuit and a sensor implemented thereon. The radio-frequency system can further include another die having a semiconductor substrate and including a control circuit for controlling the radio-frequency circuit and a sensor implemented thereon. The control circuit can be configured to receive sensed information from the sensor of the die with the radio-frequency circuit and sensed information from the sensor of the die with the control circuit, and to be capable of adjusting operation of the radio-frequency circuit based on the sensed information from either or both of the sensors. In some embodiments, the radio-frequency system can be implemented as part of a packaged module.
1 . A radio-frequency system comprising:
a first die having a semiconductor substrate and including a radio-frequency circuit and a sensor implemented thereon, the sensor being one of a plurality of similar sensors; and
a second die having a semiconductor substrate and including a control circuit for controlling the radio-frequency circuit and a sensor implemented thereon, the control circuit configured to receive sensed information from the sensor of the first die and sensed information from the sensor of the second die, the control circuit further configured to be capable of adjusting operation of the radio-frequency circuit based on the sensed information from either or both of the sensors, the sensed information including a temperature measurement or a change in temperature.
2 . The radio-frequency system of claim 1 wherein the sensor implemented on the first die is part of the radio-frequency circuit.
3 . The radio-frequency system of claim 1 wherein the sensor implemented on the first die is located away from the radio-frequency circuit.
4 . The radio-frequency system of claim 1 wherein the radio-frequency circuit includes an amplifier.
5 . The radio-frequency system of claim 4 wherein the amplifier is configured as a power amplifier.
6 . The radio-frequency system of claim 5 wherein the control circuit is configured to adjust operation of the power amplifier based on the temperature measurement or the change in temperature.
7 . The radio-frequency system of claim 6 wherein the adjustment of the power amplifier includes either or both of gain and phase of the power amplifier.
8 . The radio-frequency system of claim 1 wherein the sensor implemented on the second die is configured to provide information representative of ambient temperature as a reference for the control circuit.
9 . The radio-frequency system of claim 1 wherein the sensor implemented on the first die is configured to provide information representative of temperature at a location of the die that affects the radio-frequency circuit.
10 . A method for operating a power amplifier system, the method comprising:
obtaining sensed temperature information from a sensor implemented on a first die having a semiconductor substrate and including a power amplifier, the sensor being one of a plurality of similar sensors;
obtaining sensed temperature information from a second die having a semiconductor substrate and including a control circuit; and
adjusting operation of the power amplifier based on the sensed temperature information from either or both of the first and second die.
11 . A wireless device comprising:
an antenna; and
a radio-frequency module in communication with the antenna and including a first die having a semiconductor substrate and including a radio-frequency circuit and a sensor implemented thereon, the sensor being one of a plurality of similar sensors, the radio-frequency module further including a second die having a semiconductor substrate and including a control circuit for controlling the radio-frequency circuit and a sensor implemented thereon, the control circuit configured to receive sensed information from the sensor of the first die and sensed information from the sensor of the second die, the control circuit further configured to be capable of adjusting operation of the radio-frequency circuit based on the sensed information from either or both of the sensors, the sensed information including a temperature measurement or a change in temperature.
12 . The wireless device of claim 11 wherein the radio-frequency circuit includes a power amplifier, and each of the sensor of the first die and the sensor of the second die is a temperature sensor.
13 . The wireless device of claim 12 wherein the control circuit is configured to adjust operation of the power amplifier based on the temperature measurement or the change in temperature.
14 . The wireless device of claim 11 wherein the sensor implemented on the second die is configured to provide information representative of ambient temperature as a reference for the control circuit, and the sensor implemented on the first die is configured to provide information representative of temperature at a location of the first die that affects the radio-frequency circuit.
15 . The wireless device of claim 12 wherein the adjustment of the power amplifier includes either or both of gain and phase of the power amplifier.
16 . The wireless device of claim 11 wherein the radio-frequency circuit is configured to support cellular functionality.