摘要：通过对音叉振动系统的研究,分析了受迫振动系统振动振幅与驱动力频率的关系及音叉共振频率与双臂质量的关系,并用共振原理设计了振动式液体密度传感器.

摘要：本文根据"通信电子线路"实验教学的内容,设计了一种硬件实验装置,包括锁相环、频率调制与解调电路、幅度调制与解调电路及混频器电路。以调频调幅电路的设计为例,说明了"通信电子线路"实验的特点和作用。通过实验装置在通信电子线路实验教学中的应用,可以显著地提高教学效果,为该课程的教学提供了一个新的途径。

摘要：本文根据通信电子线路实验教学的内容,设计了一套EDA虚拟实验。该套虚拟实验包括了锁相环、频率调制与解调电路、幅度调制与解调电路及混频器电路。以调幅AM调制解调和小数频率合成器的仿真设计为例,说明了通信电子线路实验的特点和作用。通过EDA仿真实验在通信电子线路实验教学中的应用,可以显著地提高教学效果。

摘要：Phase locked loop(PLL) is a typical analog-digital mixed signal circuit and a method of conducting a top level system verification including PLL with standard digital simulator becomes especially *** behavioral level model(BLM) of the PLL in Verilog-HDL for pure digital simulator is innovated in this paper,and the design of PLL based clock and data recovery(CDR)circuit aided with jitter attenuation PLL for SerDes application is also *** CDR employs a dual-loop architecture where a frequency-locked loop acts as an acquisition aid to the phase-locked *** simultaneously meet jitter tolerance and jitter transfer specifications defined in G.8251 of optical transport network(ITU-T OTN),an additional jitter attenuation PLL is *** results show that the peak-to-peak jitter of the recovered clock and data is 5.17 ps and 2.3ps *** core of the whole chip consumes 72 mA current from a 1.0V supply.

摘要：A limiting amplifier IC implemented in 65 nm CMOS technology and intended for high-speed optical fiber communications is described in this *** inductorless limiting amplifier incorporates5-stage 8 dB gain limiting cells with active feedback and negative Miller capacitance,a high speed output buffer with novel third order active feedback,and a high speed full-wave *** receiver signal strength indictor(RSSI) can detect input signal power with 33 dB dynamic range,and the limiting amplifier features a programmable loss of signal(LOS) indication with external *** sensitivity of the limiting amplifier is 5.5mV at BER = 10 ^(-12) and the layout area is only 0.53 ×0.72 mm because of no passive *** total gain is over 41 dB,and bandwidth exceeds12 GHz with 56 mW power dissipation.