| 摘要 |
<p>An amplifier, such as an operational amplifier, has a high differential gain stage despite low supply voltage. By duplicating the conventional input stage (Q1 to Q4), in another stage (Q11 to Q15), making that pair of voltage buffers so formed a differential pair, and arranging the output transistors (Q5,Q15) themselves into a differential pair, high gains are possible even though the PNP transistors (Q3,Q13,Q17) have a low Early voltage.</p> |
