| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a temperature sensing circuit and an adjustment method therefor, capable of sensing temperature with high precision regardless of manufacturing variations. <P>SOLUTION: A temperature sensing circuit includes: first and second diodes, each having a separate P-N junction surface; a first current path which is connected in series with the first diode and includes a first variable voltage divider resistor whose voltage divider resistor ratio varies depending on a first offset adjustment signal; a second current path which is connected in series with the second diode and includes a second variable voltage divider resistor whose voltage divider resistor ratio varies depending on a second offset adjustment signal; a reference voltage generator for outputting a differential voltage, representing the difference between a first divided voltage that has been divided by the first variable voltage divider resistor, and the potential on the second current path, while feeding back the differential voltage to each of the first and second current paths; and a temperature sensing signal generator for generating a temperature sensing signal based on a second divided voltage that has been divided by the second variable voltage divider resistor. <P>COPYRIGHT: (C)2013,JPO&INPIT |
