The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
A 10 GHz 4-phase ring-VCO based injection-locked clock multiplier (RILCM) for 40 Gb/s SerDes application is presented in this paper. The RILCM adopts two loops which share common part circuit to realize the injection lock. The first loop which is the frequency lock loop (FLL), drags the VCO's free-running frequency to the injection lock-in range. Another loop which is the injection timing control...
A continuous-time Delta-Sigma modulator (CTDSM) using passive low pass-filter (LPF) in the feedback DAC is proposed. The LPF helps to reduce the signal swing and slew-rate requirements of the first amplifier in CTDSM and also contributes one-order noise shaping. A modulator synthesis is analyzed. The performance of the modulator has been verified through simulations using a standard 0.18-μm CMOS process...
Achieving large low-frequency gain together with low noise and a high unity-gain bandwidth (UGB) imposes conflicting requirement on bias currents in single stage operational transconductance amplifiers (OTA). In this work, we propose a modified biasing scheme for folded cascode OTAs to de-couple the gain versus noise/UGB trade-off. The effectiveness of proposed biasing scheme is illustrated with the...
This paper presents a novel subthreshold Darlington pair based negative bias temperature instability (NBTI) monitoring sensor under the stress conditions. The Darlington pair used in the circuit provides the stability of the circuit and the high input impedance of the circuit makes it less affected by the PVT variations. The proposed sensor provides the high degree of linearity and sensitivity under...
High temperature modelling of GaN HEMTs requires a knowledge of the temperature dependency of low field channel mobility and parasitic source / drain resistances. We discuss extraction of this dependency from drain current versus gate voltage curve at small drain-source voltage.
Many semiconductor industries gradually tend to transit from the complex 2D design to a high regularity of 1D gridded design. In this transition process, cut distribution position has become the most important challenge. For more advanced nanometer designs, cuts may be too dense to be printed by 193i lithography. While Directed Self-Assembly (DSA) is outstanding in recent years, it is a great potential...
This paper presents a Flash ADC with low offset dynamic comparators using an offset cancellation technique. By dynamically storing the comparator offset on the input capacitors, the offset is suppressed mostly. Two 5-bit 160MS/s Flash ADCs (Flash-A using the proposed offset cancellation technique and Flash-B without cancellation) are fabricated in 65nm CMOS for comparison. The measure results show...
This paper presents a 2-input and 3-output 0.35–1.5GHz switch cell with active balun. The proposed differential switch cell is composed of 8 differential series-shunt-series switches which improve the transmit efficiency of switch cell. Two wideband active baluns are used to compensate for the loss of passive switch cell which almost consumes no DC power. Fabricated by 0.18μm SiGe BiCMOS technology,...
Since large array devices of MOSFETs are huge for driving capabilities, ESD self protections are also required. Then, the large drain-contact-to-poly-gate-spacing layout rule is usually adopted with large layout areas. In this paper, a new control circuit is implemented for adopting the minimum device layout rule in the LAD. Hence, it results in a very small layout area and ESD self-protection capabilities...
The electrical and optical characteristics of the three port InGaN/GaN blue quantum-well heterojunction bipolar light-emitting transistors (QW HBLETs) on sapphire substrate are reported. The base-emitter (BE) light-emitting diode and base-collector (BC) diode are demonstrated. Next, the Gummel-poon plot is measured. Moreover, the collector current-voltage (I-V) and light-current-voltage (LI-V) characteristics...
The performance of router directly impacts the Network-on-Chip (NoC) performance. This paper focus on developing efficient microarchitecture of allocator in the router and proposed matrix-diagonal allocator with high matching quality and low packets latency. The allocator, taking advantage of the fact that each element in the diagonal doesn't share the same row or column, includes matrix-diagonal...
This paper presents a clock-feedthrough compensation technique for bootstrapped switches. The proposed technique utilizes a dummy transistor to generate a reverse voltage, which compensates the input-dependent error caused by clock feedthrough effect of sampling switch. Simulation result shows the differential sampling error of bootstrapped switch reduces from 7.2mV to 1.4mV for the worst case, operating...
A power-on-reset (POR) circuit, which is an important block in mixed-signal integrated circuits, is used for the correct initialization of critical logic states in digital blocks of mixed-signal circuits. A POR circuit with precisely triggered threshold voltages is proposed. The circuit is designed in a 0.18 μm CMOS technology with a maximum 4 μA quiescent current. The output signal of the proposed...
This paper presents an addition and multiplication computation cell using pulse train time amplifier (TA) and time register (TR), which could be easily extend to large-scale computation. The proposed pulse train TA exploits a delay cell ring to realize large input range. In TR a gated delay line with MOS capacitor is adopted to achieve both large number computation and high resolution. Finally, a...
Recently, a new lightweight block cipher, SKINNY, has been proposed by Beierle et al. in Annual Cryptology Conference 2016. This paper presents an area-efficient FPGA implementation of SKINNY block cipher. In this paper, a new column-serial structure is proposed to speed up SKINNY without compromising its area cost, and the implementation of SKINNY S-box is optimized by utilizing FPGA embedded dual-port...
We have proposed a method of designing embedded clock-cycle-sensitive Hardware Trojans (HTs) to manipulate finite state machine (FSM). By using pipeline to choose and customize critical path, the Trojans can facilitate a series of attack and need no redundant circuits. One cannot detect any malicious architecture through logic analysis because the proposed circuitry is the part of FSM. Furthermore,...
Ethylene glycol and ortho-dichlorobenzene solvents are used for Nickel (Ni) and Cobalt (Co) nanoparticles (NPs) synthesis, respectively. The wettability by these colloidal nanoparticles samples over silicon oxide wafer substrate has been studied to get insight about distribution of nanoparticles over oxide wafer. It has been found that the samples having nanoparticles in ortho-dichlorobenzene and...
Bluetooth low energy (BLE) is widely used for short distance and low rate communication. GFSK modulation is also widely used, because of its excellent power utilization and spectrum utilization. Compared to GFSK analog modulation, digital GFSK modulation is lower in the bit error rate. In this paper, the digital GFSK modulation is studied, and the GFSK modulation scheme is proposed and simulated by...
This paper analyzes the formation energy and electronic structure of Li-N co-doped diamond by the method of the first-principles density-functional theory (DFT). We found that the Li-N co-doped diamond shows the shallow donor level mainly contributed by the N-2s states and N-2p states for the first time. Meanwhile, the doping efficiency of Li in diamond can be improved by the introduction of N atom...
IEEE 802.11b WLAN is widely used to implement Wi-Fi based Time Difference of Arrival (TDoA) indoor localization. This paper presents a novel IEEE 802.11b baseband receiver and the corresponding localization system. Frame detector and phase recovery block are dedicated to frame reception and frequency offset compensation. Baker code re-correlator is specially designed to improve anti-noise performance...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.