| 摘要 |
<p>A differential amplifier (60, 60') enhances common-mode stability by making two nodes (86, 87) of a first stage low common-mode impedance nodes and thus shifting a common-mode dominant pole from the two nodes (86, 87). The first stage includes an input portion (80, 80') and a differential load (110, 110'). The input portion (80, 80') provides first and second currents respectively to the differential load (110, 110') in response to a differential input voltage. The first and second currents have a differential component and a common-mode component. The differential load (110, 110') converts the differential and common-mode components of the first and second currents into differential and common-mode voltages, respectively, and provides a high impedance to the differential component and a low impedance to the common-mode component. <IMAGE></p> |
