A high-precision low-voltage bipolar current mirror circuit and its compensation for stability
| Autor: | Yasuaki Noguchi, Fujihiko Matsumoto, Ayako Miyake |
|---|---|
| Rok vydání: | 2000 |
| Předmět: |
Engineering
business.industry Electrical engineering Hardware_PERFORMANCEANDRELIABILITY LED circuit Wilson current mirror Active load Constant power circuit Current limiting Current mirror Widlar current source Hardware_INTEGRATEDCIRCUITS Electronic engineering Current sensor Electrical and Electronic Engineering business |
| Zdroj: | International Journal of Electronics. 87:71-78 |
| ISSN: | 1362-3060 0020-7217 |
| DOI: | 10.1080/002072100132462 |
| Popis: | A current mirror circuit is widely utilized as an important building block in analogue signal processing circuits. This paper describes a high-precision low voltage bipolar current mirror circuit. Well known current mirror circuits, such as a simple current mirror and a Wilson current mirror, have a trade-off between low-voltage operation and accuracy of the current gain. The accuracy of the proposed current mirror is high in spite of low current amplification factor (β) of transistors and large current output (or a large number of the multiple output). The current mirror circuit can operate at a 1V or less supply voltage. The high accuracy is realized by negative current feedback with high gain. Thus, the stability of the circuit and compensation methods are discussed. PSPICE simulation shows that the proposed current mirror circuit compensated using Miller components composed of a capacitor and a resistor is stable and can operate at a 1V supply voltage. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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