| Citation: |
Cao Hanmei, Yang Yintang, Cai Wei, Lu Tiejun, Wang Zongmin. Multiplexer Design Applied to High-Speed Signal Transmission[J]. Journal of Semiconductors, 2008, In Press.
Cao H M, Yang Y T, Cai W, Lu T J, Wang Z M. Multiplexer Design Applied to High-Speed Signal Transmission[J]. J. Semicond., 2008, 29(6): 1040.
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Multiplexer Design Applied to High-Speed Signal Transmission
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Abstract
A multiplexer with a low-distortion high-bandwidth analog switch is presented.The gate-to-source voltage of the switch is set by the combined on-voltage of a pMOS and an nMOS,and the difference between its gate-source voltage and the threshold voltage (VGST) is guaranteed to be constant with input variation.Thus,the body effect is nearly canceled.Implemented in a TSMC 0.18μm CMOS process,results from HSPICE simulation show that the VGST is nearly constant with an input range from 0.3 to 1.7V,and the -3dB bandwidth is larger than 10GHz;the SFDR (spurious free dynamic range) of the output is 67.11dB with 1GHz input frequency;the turn-on time is 2.98ns,and the turn-off time is 1.35ns,which indicates a break-before-make action of the multiplexer.The proposed structure can be applied to high speed signal transmission.-
Keywords:
- low-distortion,
- high speed,
- multiplexer,
- analog switch
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