Current-mode flash analog-to-digital converter
This thesis describes the development of a flash analog-to-digital converter based on current-mode technique. The advantages of current -mode technique are higher speed, smaller chip area, and simple division of reference current based on current mirror. A current-mode comparator is designed consist...
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| Language: | en_US |
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2013
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| Online Access: | http://hdl.handle.net/1957/37347 |
| Summary: | This thesis describes the development of a flash analog-to-digital converter based on
current-mode technique. The advantages of current -mode technique are higher speed,
smaller chip area, and simple division of reference current based on current mirror. A
current-mode comparator is designed consisting of a cascode current mirror and a
current sense amplifier used as a latch. The new method allows effective and simple
high-speed A/D conversion where the input is a current signal and the output of the
latch is a digital voltage signal. A four-bit flash analog-to-digital converter, using
current sense amplifier comparator is designed and simulated in 1-micron CMOS
technology. Simulation results show that for ADC with resolution below six-bit, this
technique offers a comparable accuracy with the existing voltage-mode methods at
much higher speed. === Graduation date: 1993 |
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