Browsing by Author "Cheng, H. W."

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A Novel ReWritable One-Time-Programming OTP (RW-OTP) Realized by Dielectric-fuse RRAM Devices Featuring Ultra-High Reliable Retention and Good Endurance for Embedded Applications
(2018-01-01)
Cheng, H. W.
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Hsieh, E. R.
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Huang, Z. H.
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Chuang, C. H.
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Chen, C. H.
A novel concept of OTP has been demonstrated to create another feasibility to allow re-writable capability before storing the data. This OTP is named ReWritable One-time programming (RW-OTP) memory. With RW-OTP, users can do the test by modifying the contexts repeatedly before finalizing the stored data. To implement the memory cell, it consists of a gate-floated FinFET and an RRAM where a bilayer has been designed as a thicker dielectric layer with resistive-switching property on a thinner dielectric-fuse layer. Moreover, the process of RW-OTP is fully compatible with the state-of-the-art CMOS logic technology. The result shows that the memory cell exhibits high retention and good endurance. With proper use of RW-OTP, the users can not only reduce error jobs cost-efficiently but also can develop various applications for their needs. This memory cell is very promising for embedded applications.
Almost disturbance decoupling control of nonlinear MIMO uncertain system and application to half-car active suspension system
(2008)
Chien, T. L.
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Chen, C. C.
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Chiu, H. C.
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Cheng, H. W.
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Chen, Ying-Chen
This paper studies the tracking and almost disturbance decoupling problem of nonlinear multi-input multi-output uncertain systems based on the feedback linearisation approach. The main contribution of this study is to construct a controller, under appropriate conditions, such that the resulting closed-loop system is valid for any initial condition and bounded tracking signal with the following characteristics: input-to-state stability with respect to disturbance inputs and almost disturbance decoupling, i.e., the influence of disturbances on the L(2) norm of the output tracking error can be arbitrarily attenuated by changing some adjustable parameters. One example, which cannot be solved by the first paper on the almost disturbance decoupling problem, is proposed in this paper to exploit the fact that the tracking and the almost disturbance decoupling performances are easily achieved by the proposed approach. In order to demonstrate the practical applicability, the paper has investigated a famous half-car active suspension system.
The Rectenna Design on Contact Lens for Wireless Powering of the Active Intraocular Pressure Monitoring System
(2013)
Cheng, H. W.
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Jeng, B. M.
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Chen, C. Y.
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Huang, H. Y.
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Chiou, J. C.
This paper proposed a wireless power harvesting system with micro-electro-mechanical-systems (MEMS) fabrication for noninvasive intraocular pressure (IOP) measurement on soft contact lens substructure. The power harvesting IC consists of a loop antenna, an impedance matching network and a rectifier. The proposed IC has been designed and fabricated by CMOS 0.18um process that operates at the ISM band of 5.8 GHz. The antenna and the power harvesting IC would be bonded together by using flip chip bonding technologies without extra wire interference. The circuit utilized an impedance transformation circuit to boost the input RF signal that improves the circuit performance. The proposed design achieves an RF-to-DC conversion efficiency of 35% at 5.8 GHz.