发明名称 |
Frequency ratio digitizing temperature sensor with linearity correction |
摘要 |
A frequency ratio digitizing temperature sensor for generating a linearity-corrected temperature output signal includes an input generation circuit receiving a PTAT current and a CTAT current and a frequency ratio ADC including data and reference oscillators. The input generation circuit generates a first current from the weighted sum of the PTAT current and the CTAT current and also generates a first corrected current being the sum of the first current and a first portion of the PTAT current. The input generation circuit provides a first output current indicative of the PTAT current and a first output voltage generated by applying the first corrected current to a first resistor for use with the data oscillator and provides a second output current being the first corrected current and a second output voltage generated by applying the first current to a second resistor for use with the reference oscillator of the ADC.
|
申请公布号 |
US7331708(B2) |
申请公布日期 |
2008.02.19 |
申请号 |
US20060361912 |
申请日期 |
2006.02.23 |
申请人 |
NATIONAL SEMICONDUCTOR CORPORATION |
发明人 |
BLOM ERIC D.;WAN JUN;URIE STUART H. |
分类号 |
G01K7/14;H03K3/01 |
主分类号 |
G01K7/14 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|