Because the bio-signals are often very weak, they can be influenced by noise easily and become hard to distinguish. In this paper, an automatic analog synthesis platform is presented for bio-acquisition systems to generate the required circuits from specification to layout with low-noise consideration. Process variations and layout effects are also simultaneously considered to generate the required circuits with high design yield. Furthermore, a user-friendly GUI is also provided to help users complete the design flow successfully and efficiently. As shown in the experimental results, this analog synthesis platform is able to generate the required circuits in seconds with low noise. The chip implementation result also verifies the capability of this tool to generate the required designs with fabricable quality.
Due to its low power, small ripple and low noise properties, low-dropout regulators (LDO) are often used in on-chip applications. However, there are few design automation works focusing on this important circuit. In this paper, an automatic optimization process is proposed to generate the optimal sizing of low dropout regulators. The devices in the LDO circuit and its error amplifier are both considered in the optimization process for reducing the overall circuit cost. The process variation effects are also considered in this work to guarantee the circuit performance after manufactured. As demonstrated in the experiments, the proposed approach successfully solves the unreachable specification in previous work and significantly improves the design yield of the generated circuits.
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