Semiconductor device having variable parameter selection based on temperature and test method
First Claim
1. A device, comprising:
- a first temperature sensing circuit having a first temperature threshold value and a first temperature hysteresis value, the first temperature sensing circuit including a first variable resistor for providing the first temperature hysteresis value, the first temperature sensing circuit providing a first temperature indication signal; and
a transistor coupled in parallel with the first variable resistor to provide a shunt in response to the first temperature indication signal.
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Abstract
A semiconductor device that may include temperature sensing circuits is disclosed. The temperature sensing circuits may be used to control various parameters, such as internal regulated supply voltages, internal refresh frequency, a word line low voltage, or the like. In this way, operating specifications of a semiconductor device at worst case temperatures may be met without compromising performance at normal operating temperatures. Each temperature sensing circuit may include a selectable temperature threshold value as well as a selectable temperature hysteresis value. In this way, temperature performance characteristics may be finely tuned. Furthermore, a method of testing the temperature sensing circuits is disclosed in which a current value may be monitored and temperature threshold values and temperature hysteresis values may be thereby determined.
51 Citations
19 Claims
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1. A device, comprising:
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a first temperature sensing circuit having a first temperature threshold value and a first temperature hysteresis value, the first temperature sensing circuit including a first variable resistor for providing the first temperature hysteresis value, the first temperature sensing circuit providing a first temperature indication signal; and a transistor coupled in parallel with the first variable resistor to provide a shunt in response to the first temperature indication signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification