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We have investigated the performance of the mono-layer MoS2 tunnel FET (TFET) through quantum transport simulations based on density functional theory (DFT). Two kinds of source/drain metal contact configurations namely the seamless contact and side contact are compared. It was found that ideal band bending control by seamless contact yields much better performance than the side contact, although...
A CMOS bandgap reference using chopping technique for OPAMP offset cancelling is presented in this paper. The OPAMP used in bandgap was intended to improve the precision of the bandgap, but this aim is in some degree reduced by the input referred offset and 1/f noise of the introduced OPAMP. Thus, an effective architecture which contains three pairs of chopping cells is designed to overcome the issue...
A low noise voltage reference is designed in this paper. The voltage reference structure is realized by using a low noise bandgap reference and a low pass filter. A +/− 3.7V voltage reference chip with low noise has been fabricated in a standard CMOS 0.5µm technology. By selecting suitable feedback resistance of the amplifier, the two measured results show that the noise of voltage reference VRP is...
The electronic properties of one-dimensional graphene nanoribbons, which could be regarded as the polymerized porphyrins, have been investigated using the first-principle methods. The types of the porphyrins have a great influence on the band gaps (Eg) of the graphene nanoribbons. The Eg as large as 1.48eV can be reached, which is large enough for the design of the logic nanoelectronic devices. The...
This paper proposes a current-mode bandgap reference which employs a novel “coarse” voltage replication to offset the 2nd-order curvature due to base-emitter voltage of the BJT. The coarse replication is based on a process insensitive transcendental equation which regulates the independent CTAT current. The bandgap reference which will be implemented in 0.35µm CMOS process has a low operating current...
To improve the performance of typical first-order bandgap references, a high precision bandgap voltage reference with second-order curvature correction is proposed in this paper. Utilizing a temperature independent current (has nothing to do with the temperature of first order) and a proportional to absolute temperature (PTAT) current, a proportional to the square of temperature (PTAT2) current can...
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