Semiconductor memory device with temperature sensing device capable of minimizing power consumption in refresh

A semiconductor memory device comprising:

• a driving control means for activating a driving signal in response to a control signal and maintaining the activation of the driving signal until a subsequent control signal is inputted;
• a temperature sensor to sense a current temperature in response to the driving signal;
• a tracking AD (Analog to Digital) converting means for tracking an analog signal from the temperature sensor on a clock-by-clock basis and converting the received analog signal into a digital signal;
• and
• a storage means for storing an output signal of the tracking AD converting means and outputting a stored signal as a temperature value,
• wherein the semiconductor memory device enters a power save mode for a predetermined time starting from an activation of the control signal and wherein during the power save mode, the semiconductor memory device has reduced power consumption.

A semiconductor memory device comprising:

• a driving control means for activating a driving signal in response to a control signal and maintaining the activation of the driving signal until a second control signal is inputted;
• a temperature sensor to sense a current temperature in response to the driving signal;
• a tracking AD (Analog to Digital) converting means for converting an analog signal from the temperature sensor into a digital signal in response to the driving signal and a sample clock signal;
• a tracking control means for providing the sample clock signal in response to a level signal from the tracking AD converting means;
• and
• a storage means for storing an output signal of the tracking AD converting means and outputting the stored signal as a temperature value, wherein the semiconductor memory device enters a power save mode for a predetermined time starting from an activation of the control signal and wherein during the power save mode, the semiconductor memory device has reduced power consumption.