Circuit device, oscillator, electronic apparatus, vehicle, and manufacturing method for circuit device
First Claim
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1. A circuit device comprising:
- an A/D conversion circuit configured to perform A/D conversion on a temperature detection voltage from a temperature sensor so as to output temperature detection data; and
a digital signal processing circuit configured to perform a temperature compensation process based on the temperature detection data,wherein the A/D conversion circuitoperates in a first mode so as to obtain the temperature detection data by performing an A/D conversion process according to a first A/D conversion method, andswitches to a second mode so as to obtain the temperature detection data by performing an A/D conversion process according to a second A/D conversion method which is different from the first A/D conversion method in a case where a predetermined condition is established,wherein, in a case where the minimum resolution of data in A/D conversion is indicated by LSB, the first A/D conversion method is a process of obtaining the temperature detection data such that a change in the temperature detection data at a second output timing following a first output timing with respect to the temperature detection data at the first output timing is equal to or less than k×
LSB (where k is a positive integer satisfying k<
j; and
j is a positive integer representing a resolution in A/D conversion).
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Abstract
A circuit device includes an A/D conversion circuit that performs A/D conversion on a temperature detection voltage from a temperature sensor so as to output temperature detection data, and a digital signal processing circuit that performs a temperature compensation process on the basis of the temperature detection data, in which the A/D conversion circuit operates in a first mode, and switches to a second mode in a case where a predetermined condition is established.
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Citations
20 Claims
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1. A circuit device comprising:
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an A/D conversion circuit configured to perform A/D conversion on a temperature detection voltage from a temperature sensor so as to output temperature detection data; and a digital signal processing circuit configured to perform a temperature compensation process based on the temperature detection data, wherein the A/D conversion circuit operates in a first mode so as to obtain the temperature detection data by performing an A/D conversion process according to a first A/D conversion method, and switches to a second mode so as to obtain the temperature detection data by performing an A/D conversion process according to a second A/D conversion method which is different from the first A/D conversion method in a case where a predetermined condition is established, wherein, in a case where the minimum resolution of data in A/D conversion is indicated by LSB, the first A/D conversion method is a process of obtaining the temperature detection data such that a change in the temperature detection data at a second output timing following a first output timing with respect to the temperature detection data at the first output timing is equal to or less than k×
LSB (where k is a positive integer satisfying k<
j; and
j is a positive integer representing a resolution in A/D conversion). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A manufacturing method for a circuit device which performs A/D conversion on a temperature detection voltage from a temperature sensor, so as to output temperature detection data, and includes an A/D conversion circuit, a storage unit, and an interface, the method comprising:
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performing measurement for determining circuit constant setting information; and causing an operation of the A/D conversion circuit to switch from a first mode in which an A/D conversion process is performed according to a first A/D conversion method in order to obtain the temperature detection data to a second mode in which an A/D conversion process is performed according to a second A/D conversion method which is different from the first A/D conversion method in order to obtain the temperature detection data, when the circuit constant setting information is written to the storage unit via the interface on the basis of a result of the measurement, wherein, in a case where the minimum resolution of data in A/D conversion is indicated by LSB, the first A/D conversion method is a process of obtaining the temperature detection data such that a change in the temperature detection data at a second output timing following a first output timing with respect to the temperature detection data at the first output timing is equal to or less than k×
LSB (where k is a positive integer satisfying k<
j; and
j is a positive integer representing a resolution in A/D conversion).
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18. A circuit device comprising:
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an A/D conversion circuit configured to perform A/D conversion on a temperature detection voltage from a temperature sensor so as to output temperature detection data; and a digital signal processing circuit configured to perform a temperature compensation process based on the temperature detection data, wherein the A/D conversion circuit operates in a first mode so as to obtain the temperature detection data by performing an A/D conversion process according to a first A/D conversion method, and switches to a second mode so as to obtain the temperature detection data by performing an A/D conversion process according to a second A/D conversion method which is different from the first A/D conversion method in a case where a predetermined condition is established, wherein the A/D conversion circuit includes a register portion in which intermediate result data or final result data is stored as result data, a D/A converter that performs D/A conversion on the result data so as to output a D/A conversion voltage, a comparison circuit that compares the temperature detection voltage from the temperature sensor with the D/A conversion voltage from the D/A converter, and a processing circuit that performs a determination process on the basis of a comparison result in the comparison circuit, and performs an update process of the result data on the basis of the determination process, wherein the processing circuit outputs the final result data which is a result of the update process as the temperature detection data. - View Dependent Claims (20)
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19. An electronic apparatus comprising the circuit device according to claim.
Specification
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Current AssigneeSeiko Epson Corporation (Seiko Group)
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Original AssigneeSeiko Epson Corporation (Seiko Group)
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InventorsKiyohara, Atsushi, Kano, Shinnosuke, Isozaki, Shigenori, Nonoyama, Mihiro
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Primary Examiner(s)Chang, Joseph
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Application NumberUS15/899,943Publication NumberTime in Patent Office616 DaysField of Search331 70, 331176US Class CurrentCPC Class CodesH03B 5/04 Modifications of generator ...H03B 5/32 being a piezoelectric reson...H03L 1/02 against variations of tempe...H03L 7/00 Automatic control of freque...H03M 1/12 Analogue/digital converters...
