| 摘要 |
A low differential output voltage circuit having a voltage generator and a differential output unit is provided. The voltage generator includes a first PMOS transistor, a first amplifier circuit, a unit gain stage, a first NMOS transistor, a second NMOS transistor. The differential output unit includes a first controlled current source, a second controlled current source, a common voltage circuit, a first switch, a second switch, a third switch, and a fourth switch. Due to the voltage generator directly provides a common mode voltage to the differential output unit, and the first amplifier circuit and the unit gain stage could overcome a channel modulation effect of MOS transistors and enhance the driving ability of the common mode voltage respectively. Thus, a response time of the invention is decreased, and an output current of the differential output unit is in a proportion to the reference current received by the voltage generator.
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