Ratio correction circuit and method for comparison of proportional to absolute temperature signals to bandgap-based signals
US5933045A · kind A · utility
25Cited by
7References
25Claims
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Key dates
| Filing date | Feb 10, 1997 |
| Grant date | Aug 3, 1999 |
| Priority date | — |
| Expiry date | Feb 10, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05F3/30
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A comparison system compares a voltage which is proportional to absolute temperature S.sub.p to one which is equal to the sum of a conventional, uncorrected, bandgap cell voltage VBG and a proportional to absolute temperature voltage CT. The addition of CT to the uncorrected bandgap signal value yields a signal of the form Sp/(VBG+CT), which exhibits improved linearity over a signal of the form Sp/VBG, where VBG includes a Tln(T) term.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.