Patent ID: 11860045
Assignee: SK HYNIX INC.
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 13:
14. An operation method of a semiconductor device, the operation method comprising:
sequentially shifting, with a control generation circuit having a plurality of signal shifting stages connected in series, a single test mode signal in response to a toggling of a clock signal, and sequentially generating a plurality of control signals using at least one sequentially shifted test mode signal obtained from a preceding stage of the plurality of signal shifting stages;
sequentially activates and deactivates a selection signal whenever generating the plurality of control signals for controlling a plurality of temperature sensing circuits;
generating, in response to the selection signal, first and second temperature sensing signals based on a first resistor having a resistance that varies depending on temperature and a second resistor having a constant resistance, respectively; and
measuring temperature by comparing the first and second temperature sensing signals.