| 摘要 |
A fully differential amplifier includes an input stage and an output stage. The input stage has two differential pairs of n-type input transistors, and two differential pairs of p-type input transistors. The output stage has a first p-type output transistor and a second n-type output transistor, the first p-type output transistor having its source coupled to a first reference voltage node and having its drain coupled to a first output node for a first component of a differential output signal, and the second n-type output transistor having its drain coupled to the first output node and having its source coupled to a second reference voltage node. A p-type input transistor and an n-type input transistor influence operation of the first p-type output transistor such that current conducted by the p-type input transistor and current conducted by the n-type input transistor contribute to the output current conducted by the first p-type output transistor. Similarly, the output current conducted by the second n-type output transistor is influenced by one p-type input transistor and one n-type input transistor.
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