| 摘要 |
A low-power multi-level PAM(Pulse Amplitude Modulation) driver and a semiconductor device having the same are provided to reduce power consumption of the multi-level PAM driver by selectively turning on/off a current source used in the multi-level PAM drive. A low-power multi-level PAM driver includes load units(R1,R2), a first current source(411), a second current source(421), a couple of first input transistors(T2), a couple of second input transistors(T4), and a current source control unit(430). The load units(R1,R2) are electrically connected to an output node. The first current source(411) provides a first current quantity to the load units(R1,R2). The second current source(421) provides a second current quantity to the load units(R1,R2). The couple of first input transistors(T2) are electrically connected to the first current source(411) and the load units(R1,R2) in response to a first bit signal. The couple of second input transistors(T4) are electrically connected to the second current source(421) and the load units(R1,R2) in response to a second bit signal. The current source control unit(430) controls on/off of one of the first current source and the second current source in response to the second bit signal and the first bit signal.
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