SEMICONDUCTOR ELEMENT TEMPERATURE DETECTING SYSTEM AND SEMICONDUCTOR MODULE AND SEMICONDUCTOR MODULE SYSTEM
First Claim
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1. A semiconductor element temperature detecting system comprising:
- a digital temperature data measuring unit that detects temperature of a semiconductor element as digital temperature data; and
a temperature data coding unit that codes the digital temperature data to coded data with a prescribed length, which coded data has lower data resolution in a low temperature range domain than in a high temperature range domain, and increases with an increase of the digital temperature data when estimating the digital temperature data as 2'"'"'s complement numbers.
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Abstract
A temperature data coding unit 100 increases the data resolution in a high temperature range and reduces the data resolution in a low temperature range, and makes the data length of the temperature data a fixed length. When carrying out numerical estimation of the fixed length code value in terms of a 2'"'"'s complement numerical code value, the temperature data coding unit 100 generates coded data that increases with an increase of the pre-coded temperature data in terms of the 2'"'"'s complement numerical code value.
3 Citations
9 Claims
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1. A semiconductor element temperature detecting system comprising:
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a digital temperature data measuring unit that detects temperature of a semiconductor element as digital temperature data; and a temperature data coding unit that codes the digital temperature data to coded data with a prescribed length, which coded data has lower data resolution in a low temperature range domain than in a high temperature range domain, and increases with an increase of the digital temperature data when estimating the digital temperature data as 2'"'"'s complement numbers. - View Dependent Claims (5, 6, 7)
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2. A semiconductor element temperature detecting system comprising:
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a digital temperature data measuring unit that detects temperature of a semiconductor element as digital temperature data; and a temperature data coding unit including; a pre-code converting unit that determines a plurality of temperature range domains in accordance with prescribed lower-order bits of the digital temperature data, and generates a pre-code from higher-order bits of the digital temperature data other than the prescribed lower-order bits; a significant data acquiring unit that obtains significant data corresponding to the temperature range domain from the prescribed lower-order bits of the digital temperature data; and a connecting unit that generates coded data by combining the pre-code with the significant data. - View Dependent Claims (3, 4)
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8. A semiconductor module comprising:
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a semiconductor element; a digital temperature data measuring unit that detects temperature of the semiconductor element as digital temperature data; and a temperature data coding unit including; a pre-code converting unit that determines a plurality of temperature range domains in accordance with prescribed lower-order bits of the digital temperature data, and generates a pre-code from higher-order bits of the digital temperature data other than the prescribed lower-order bits; a significant data acquiring unit that obtains significant data corresponding to the temperature range domain from the prescribed lower-order bits of the digital temperature data; and a connecting unit that generates coded data by combining the pre-code with the significant data.
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9. A semiconductor module system comprising:
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a semiconductor element; a controller that outputs an instruction signal for controlling a gate of the semiconductor element; a digital temperature data measuring unit that detects temperature of the semiconductor element as digital temperature data; a temperature data coding unit including; a pre-code converting unit that determines a plurality of temperature range domains in accordance with prescribed lower-order bits of the digital temperature data, and generates a pre-code from higher-order bits of the digital temperature data other than the prescribed lower-order bits; a significant data acquiring unit that obtains significant data corresponding to the temperature range domain from the prescribed lower-order bits of the digital temperature data; and a connecting unit that generates coded data by combining the pre-code with the significant data; a control unit that decides validity of the instruction signal of the controller in accordance with the digital temperature data and generates a control signal; and a driving signal generating unit that generates a driving signal for driving the gate of the semiconductor element in response to the control signal.
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Specification