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This paper describes the design of a kind of 1553B bus test unit based on multi-core DSP and FPGA. It is used to realize the 1553B bus protocol test and electrical performance test. This paper mainly describes the design of the 1553B bus protocol analysis module for protocol test, the design of the high-speed ADC module for signal acquisition, the design of the high-speed DAC for signal generation...
A 25–28Gb/s full-rate reference-less CDR is presented and designed in a standard 0.13μm SiGe BiCMOS process, which can be applicable to nearly all classical 100G communication protocols by multi-channel configuration. It consists mainly of a full-rate phase frequency detector, a quadrature voltage control oscillator and two voltage to current convertors with loop filters. A dual-loop topology is adopted...
Power consumption is one of the key optimization objectives for modern integrated circuit designs. More than 40% of the total power consumption is contributed by clock trees due to their high frequency of switching and high capacitance. In the traditional physical design flow, placement is done before clock tree synthesis (CTS). CTS constructs a tree to connect the clock source with all the registers...
More than eighty different test environments need to be created and maintained for debugging the Marvell Ethernet PHY chip if the traditional industrial verification methodology is being used. This can easily incite very complicated debugging procedures and cause the problems and concerns of a multitude of engineering resources. The latest Marvell Ethernet PHY IC UVM verification platform integrating...
During the past decade, the issue of personal information privacy has drawn considerable attention among law, public policy, marking, organizational behavior and information systems. Unfortunately, the lack of consumer confidence in protecting personal information privacy has been identified as a major problem hampering the growth of e-commerce. Despite the importance of understanding the nature of...
GaAs-based Blocked-Impurity-Band (BIB) detector, as a potential high-sensitive, low noise Terahertz (THz) detector, has been developed for the broad application in the area of THz security check and astronomy mission. In this work, GaAs:Si and GaAs:Te BIB detectors were fabricated. Their responsivity properties were measured at T=3.5K, under different biases and the same black body temperature of...
We have developed a GaAs-based Blocked-Impurity-Band (BIB) Detector for the application of Terahertz (THz) security check and astronomical observation. In this work, we have fabricated GaAs:Si and GaAs:Te BIB detectors and analyzed their spectral response characteristics at 3.5K The experimental results of GaAs:Si BIB device demonstrate that the spectral response increases when the bias rises from...
In order to study the influence of vertical grounding electrode on impulse grounding resistance of substation ground network, the grounding model was built in COMSOL, and the impulse grounding resistances of substation grounding grid in different distribution, length and quantity of vertical grounding electrode were simulated and calculated. The results show that the closer the vertical ground to...
Through silicon vias (TSVs) are arranged to form a rectangular resonant cavity to improve performance of silicon based antenna in this paper. On the basis of fundamental theory of rectangular resonant cavity, the model of cavity made of through silicon vias is analyzed. Considering the size of millimeter-wave antenna, the three dimensions of cavity for mode TE101 is calculated. Applying the resonant...
This paper presents a dual-channel GNSS receiver covering GPS and Beidou on a single chip in 0.13μm CMOS process. The receiver incorporates one reconfigurable RF front-end and two separate IF signal channels with one single fractional-N frequency synthesizer by using a ring voltage-controlled oscillator. This architecture supports an external active or passive antenna and provides the benefits of...
The Virtual MIMO scheme is a proven technique to reduce energy consumption in WSN but it cannot resolve the energy efficiency problem in WSN. In high node density WSN, sensor nodes transmitted correlated information to sink node that will decreases the energy efficiency of WSN. For enhancing the energy efficiency of WSN, we propose distributed source coding based on virtual MIMO. In DSC-MIMO, DSC...
An OVT based on Mach-Zehnder interferometer is proposed in this paper, which helps to convert the electro-optic phase delay into the displacement of the interference fringe. And then, the voltage applied to the electro-optic crystal is obtained by positioning the displacement of the fringe, and the effectiveness of this method is verified by experiments. The new OVT meets the requirements of 0.5%...
In order to compensate for the effects of supply voltage, process and temperature on the oscillator frequency, we design a ring oscillator with digital calibration. By comparing the frequency deviation between the ring oscillator and the external reference clock source, adjusting the state of the control word, and then changing the number of resistors in the analog circuit to adjust the output frequency...
The design and implementation of a K-band fast hopping frequency synthesizer based on DDS and PLL is described. Main technical specifications are as follows: frequency ranges from 24GHz to 27GHz, step frequency is 50MHz and lock time is less than 150ns. The parameters of loop filter and the analyses of phase noise and lock time are provided by MATLAB simulation to verify the feasibility of the design...
This letter proposes a new concurrent CMOS voltage-controlled oscillator (VCO). The oscillator consists of two sub-VCO operates at 4GHz and 6GHz respectively. The two sub-VCOs are coupled by a pair of MIM capacitors. The proposed oscillator has been implemented with the TSMC 0.18μm BiCMOS technology. By controlling the supply voltages, the VCO has three different operational modes, capable of generating...
In this paper a 12bit 10GSps current-steering digital-to-analog converter (DAC) in 280GHz fT 0.7um InP HBT technology is presented. The DAC core works in a double-sampling way, which reduces the maximum clock frequency by half. The double-sampling switch is separated to reduce the inter-symbol-interference. An improved current steer switch architecture is adopted to enhance high frequency dynamic...
The carrier frequency offset(CFO) in OFDM system is one of the key factors that affect the performance of wireless communication. Based on the analysis of the CFO estimation algorithm, this paper presents FPGA implementation scheme in the problem of OFDM fractional CFO estimation using pilot-based algorithm, including CFO estimation and CFO compensation. The circuit modules in the program were written...
A novel radiation hardened 12T memory cell (RH-12T) is proposed to address single event upset (SEU) problems in 65nm CMOS technology. It eliminates the possibility of a sensitive “0” storage node upset by surrounding the output nodes with NMOS, realizing a full resistance for any single node upset. Furthermore, less sensitive node pairs are obtained in circuit design compared to the DICE cell, which...
There will always have a greater residual stress in the processing process of the micromechanical gyroscopes straight elastic-beam. affecting the performance of micromechanical gyroscopes. According to the principle of stiffness equivalence, the original elastic-beam of the micromechanical gyroscope is improved to the beam of drive as the U-beam and sense as the carb-leg beam by the combination of...
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