| 摘要 |
A dual supply amplifier without using an inter-stage capacitor is disclosed. The dual supply amplifier has an input stage coupled to a lower supply voltage VDD1 for generating a voltage signal V3 proportion to a difference between a pair of inputs. A conversion stage is coupled a higher supply voltage VDD2 and a third supply voltage VDD3, which can be ground or a negative potential, for generating a signal V1 with reference to VDD2 and a signal V2 with reference to VDD3. An output stage receives V1 and V2 for generating an output signal Vo with a swing between VDD2 and VDD3.
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