Digital temperature sensing circuit
AssigneeSK hynix Inc.
InventorsChan Hui Jeong, Suk Hwan Choi
Life of this patent
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Abstract
The digital temperature sensing circuit includes a temperature voltage generator configured to generate a temperature voltage varying with a temperature in response to a first reference voltage, divide a supply voltage in response to a second reference voltage, and generate a high voltage and a low voltage, a code voltage generator configured to divide the second reference voltage based on the high voltage and the low voltage and output divided voltages having different voltage levels, and a mode selector supplied with the temperature voltage and the divided voltages, and configured to output a first code or a second code in response to a mode select signal, wherein the first code and the second code have different numbers of bits.
Claims11
A memory system, comprising:
- a memory device configured to perform operations using operation voltages;
- a digital temperature sensing circuit configured to sense a temperature of the memory system and output a digital temperature code corresponding to the temperature in response to a mode select signal;
- and
- a memory controller configured to output the mode select signal indicating a number of bits of the digital temperature code, to receive the digital temperature code from the digital temperature sensing circuit and to control the memory device to change levels of the operation voltages based on the digital temperature code,
- wherein the digital temperature code includes a first code or a second code having different numbers of bits according to the mode select signal.
A memory system, comprising:
- a memory device configured to perform operations using operation voltages;
- a digital temperature sensing circuit configured to sense a temperature of the memory system and output a digital temperature code corresponding to the temperature in response to a mode select signal;
- and
- a memory controller configured to output the mode select signal indicating a number of bits of the digital temperature code, to receive the digital temperature code from the digital temperature sensing circuit and to control the memory device to change levels of the operation voltages based on the digital temperature code,
- wherein the digital temperature sensing circuit includes:
- a temperature voltage generator configured to generate a temperature voltage varying with a temperature, a high voltage, and a low voltage;
- a code voltage generator configured to output divided voltages having various voltage levels based on the high voltage and the low voltage;
- and
- a mode selector supplied with the temperature voltage and the divided voltages, and configured to output first codes or second codes having a resolution higher than that of the first codes in response to a mode select signal.
Dependencies are inferred from the claim text.