A 1-V CMOS Current Reference With Temperature and Process Compensation
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Bibliographic record
Abstract
A 1-V current reference fabricated in a standard CMOS process is described. Temperature compensation is achieved from a bandgap reference core using a transimpedance amplifier in order to generate an intermediate voltage reference, V <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">REF</sub> . This voltage applied to the gate of a carefully sized nMOS output transistor provides a reference drain current, I <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">REF</sub> , nearly independent of temperature by mutual compensation of mobility and threshold voltage variations. The circuit topology allows for compensation of threshold voltage variation due to process parameters as well. The current reference has been fabricated in a standard 0.18-mum CMOS process. Results from nineteen samples measured over a temperature range of 0degC to 100degC , showed values of I <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">REF</sub> of 144.3 muA plusmn 7% and V <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">REF</sub> of 610.9 mV plusmn 2% due to the combined effect of temperature and process variations.
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Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
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Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
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