IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0459056
(2014-08-13)
|
등록번호 |
US-9719861
(2017-08-01)
|
발명자
/ 주소 |
- Ramaraju, Ravindraraj
- Bearden, David R.
|
출원인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
32 |
초록
▼
A temperature sensor circuit implemented in electronic circuitry that senses the temperature at a site, digitizes the sensed temperature, and then outputs a signal representing such a sensed temperature. The temperature sensor circuit converts a voltage signal that is proportional to the temperature
A temperature sensor circuit implemented in electronic circuitry that senses the temperature at a site, digitizes the sensed temperature, and then outputs a signal representing such a sensed temperature. The temperature sensor circuit converts a voltage signal that is proportional to the temperature to a first digital value. The temperature sensor circuit converts a voltage signal that is inversely proportional to the temperature to a second digital value. The sensed temperature is determined as a function of a difference between the first and second digital values.
대표청구항
▼
1. A system for determining a temperature of a location in electronic circuitry, comprising: first circuitry, in proximity to the location in the electronic circuitry, configured to adjust first and second output voltages as a function of an operating temperature of the electronic circuitry at the l
1. A system for determining a temperature of a location in electronic circuitry, comprising: first circuitry, in proximity to the location in the electronic circuitry, configured to adjust first and second output voltages as a function of an operating temperature of the electronic circuitry at the location;second circuitry configured to convert the first and second output voltages to a first voltage signal that is proportional to the operating temperature;third circuitry configured to convert the second output voltage to a second voltage signal that is inversely proportional to the operating temperature;fourth circuitry configured to determine a difference between the first voltage signal and the second voltage signal to produce a difference voltage value, including: circuitry configured to produce a first digital version of the first voltage signal, the circuitry configured to produce the first digital version includes a first analog-to-digital converter;circuitry configured to produce a second digital version of the second voltage signal, the circuitry configured to produce the second digital version includes a second analog-to-digital converter;circuitry configured to produce a digital version of the difference voltage value from a difference between the first digital version of the first voltage signal and the second digital version of the second voltage signal, the circuitry configured to produce the difference voltage value includes subtraction circuitry configured to receive the first and second digital versions; andfifth circuitry configured to determine the temperature of the location in the electronic circuitry as a function of the difference voltage value. 2. The system as recited in claim 1, wherein the second circuitry comprises a first current mirror circuit with a first input coupled to receive the first output voltage from the first circuitry and a second input coupled to receive the second output voltage from the first circuitry, wherein the first current mirror circuit is configured to convert a difference between the first and second output voltages into the first voltage signal that is proportional to the operating temperature. 3. The system as recited in claim 2, wherein the third circuitry comprises a second current mirror circuit with a third input coupled to receive the second output voltage from the first circuitry, wherein the second current mirror circuit is configured to convert the second output voltage into the second voltage signal that is inversely proportional to the operating temperature. 4. The system as recited in claim 1, wherein the first circuitry comprises: a first set of one or more diodes having a first emitter injection area, the first set of the one or more diodes configured to output the first output voltage; anda second set of one or more diodes having a second emitter injection area, the second set of the one or more diodes configured to output the second output voltage, wherein the second emitter injection area is greater than the first emitter injection area. 5. The system as recited in claim 1, wherein the temperature of the location in the electronic circuitry is determined as a function of the digital version of the difference voltage value. 6. The system as recited in claim 1, wherein the first and second analog-to-digital converters are energized by a common reference voltage. 7. The system as recited in claim 1, wherein the fourth circuitry further comprises: a first multiplexer with a first input configured to receive the first voltage signal that is proportional to the operating temperature, and a second input configured to receive the second voltage signal that is inversely proportional to the operating temperature, wherein an input of the first analog-to-digital converter is coupled to an output of the first multiplexer;a second multiplexer with a first input configured to receive the second voltage signal that is inversely proportional to the operating temperature, and a second input configured to receive the first voltage signal that is proportional to the operating temperature, wherein an input of the second analog-to-digital converter is coupled to an output of the second multiplexer; andselection circuitry configured to sequentially select the first and second inputs to the first and second multiplexers in order to respectively produce first and second iterations of the difference voltage value. 8. The system as recited in claim 7, wherein the fifth circuitry is configured to determine the temperature of the location in the electronic circuitry as a function of an average of the first and second iterations of the difference voltage value. 9. The system as recited in claim 7, wherein the fourth circuitry further comprises: a third multiplexer with a first input coupled to an output of the first analog-to-digital converter, a second input coupled to an output of the second analog-to-digital converter, and an output coupled to a first input of the subtraction circuitry; anda fourth multiplexer with a first input coupled to an output of the second analog-to-digital converter, a second input coupled to an output of the first analog-to-digital converter, and an output coupled to a second input of the subtraction circuitry,wherein the selection circuitry is configured to sequentially select the first and second inputs to the first, second, third, and fourth multiplexers in order to produce the at least first and second iterations of the difference voltage value. 10. A method for determining a temperature of a location in electronic circuitry, comprising: converting a first voltage signal that is proportional to the temperature of the location in the electronic circuitry to a first digital value;converting a second voltage signal that is inversely proportional to the temperature of the location in the electronic circuitry to a second digital value;determining a first difference value between the first and second digital values; andoutputting the temperature of the location in the electronic circuitry as a function of the first difference value between the first and second digital values, wherein the converting of the first and second voltage signals is performed with first and second analog-to-digital converters energized with a common reference voltage. 11. The method as recited in claim 10, wherein the first voltage signal that is proportional to the temperature of the location in the electronic circuitry is a difference between first and second voltages. 12. The method as recited in claim 10, further comprising: converting the first voltage signal that is proportional to the temperature of the location in the electronic circuitry to a third digital value;converting the second voltage signal that is inversely proportional to the temperature of the location in the electronic circuitry to a fourth digital value;determining a second difference value between the third and fourth digital values; andoutputting the temperature of the location in the electronic circuitry as a function of an average of the first and second difference values. 13. A system for determining a temperature of a location in electronic circuitry, comprising: a first set of circuit elements configured to output a first output voltage;a second set of circuit elements configured to output a second output voltage, wherein the first and second sets of circuit elements are resident in proximity to the location in the electronic circuitry, wherein the first and second output voltages independently vary as a function of an operating temperature of the electronic circuitry at the location, wherein the first and second output voltages are not equal;a first current mirror circuit with a first input coupled to receive the first output voltage and a second input coupled to receive the second output voltage, wherein the first current mirror circuit is configured to convert a difference between the first and second output voltages into a first voltage signal that is proportional to the operating temperature;a second current mirror circuit with a third input coupled to receive the second output voltage, wherein the second current mirror circuit is configured to convert the second output voltage into a second voltage signal that is inversely proportional to the operating temperature; andcircuitry configured to determine the temperature of the location in the electronic circuitry as a function of a difference between the first and second voltage signals, including:a first analog-to-digital converter configured to produce a first digital version of the first voltage signal;a second analog-to-digital converter configured to produce a second digital version of the second voltage signal; andsubtraction circuitry configured to produce the difference between the first and second voltage signals as a function of a difference voltage value produced from a subtraction of the second digital version from the first digital version. 14. The system as recited in claim 13, wherein the first and second analog-to-digital converters are energized by one or more reference voltage sources that output a reference voltage that fluctuates its magnitude as a function of temperature. 15. The system as recited in claim 13, wherein the first and second analog-to-digital converters are energized by a common reference voltage. 16. The system as recited in claim 15, wherein the circuitry configured to determine the temperature of the location in the electronic circuitry as the function of the difference between the first and second voltage signals further comprises: a first multiplexer with a first input configured to receive the first voltage signal that is proportional to the operating temperature, and a second input configured to receive the second voltage signal that is inversely proportional to the operating temperature, wherein an input of the first analog-to-digital converter is coupled to an output of the first multiplexer;a second multiplexer with a first input configured to receive the second voltage signal that is inversely proportional to the operating temperature, and a second input configured to receive the first voltage signal that is proportional to the operating temperature, wherein an input of the second analog-to-digital converter is coupled to an output of the second multiplexer; andselection circuitry configured to sequentially select the first and second inputs to the first and second multiplexers in order to respectively produce first and second iterations of the difference voltage value. 17. The system as recited in claim 16, wherein the circuitry configured to determine the temperature of the location in the electronic circuitry is further configured to determine the temperature as a function of an average of the first and second iterations of the difference voltage value.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.