| 摘要 |
Described are regulated cascode amplifiers with improved low-voltage performance. The improved amplifier is similar to conventional regulated cascode amplifiers, including a cascode circuit and a feedback amplifier. The cascode circuit conventionally includes two output transistors, the first of which preferably remains in saturation to provide a relatively stable output resistance over a range of output voltages. A booster circuit in accordance with one embodiment maintains the first transistor of the cascode circuit in saturation over a broader range of output voltages, and consequently extends the low-end of the operating range of the cascode amplifier.
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