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A multiphase LC voltage-controlled oscillator (VCO) with a novel capacitive coupling CL ladder filter structure is proposed in this paper and this 10 GHz eight-phase VCO is applied in clock and data recovery (CDR) circuit for 40 Gb/s optical communications system. Compared with the traditional eight-phase oscillator, this capacitive coupling structure can(More)
Mobile health applications offer unique opportunities for monitoring patient progress, providing education materials to patients and family members, receiving personalized prompts and support, collecting ecologically valid data, and using self-management interventions when and where they are needed. Mobile health application services to mental illness have(More)
Six coal samples of different ranks have been used to prepare single-layer graphene quantum dots (S-GQDs). After chemical oxidation and a series of centrifugation separation, every coal could be treated into two fractions, namely, CoalA and CoalB. According to the characterization results of TEM, AFM, XRD, Raman and FTIR, CoalA was revealed to be mainly(More)
This paper proposed a 4-channel parallel 40 Gb/s front-end amplifier (FEA) in optical receiver for parallel optical transmission system. A novel enhancement type regulated cascade (ETRGC) configuration with an active inductor is originated in this paper for the transimpedance amplifier to significantly increase the bandwidth. The technique of three-order(More)
We realized 10Gb/s limiting amplifier by using SMIC 0.18μm 1P6M mixed-signal CMOS process. Without any inductors, the bandwidth of the amplifier is effectively increased while maintaining a flat frequency response by using a third-order interleaving active feedback. The post-simulation results indicates that it can work at the bit-rate of 10Gb/s, a(More)
A 10 Gb/s continuous-time linear adaptive equalizer IC for 10 Gigabit short-reach optical interconnects using GLOBALFOUNDRIES (GF) 0.13 μm SiGe BiCMOS technology is described. The circuit consists of a continuous-time linear equalizer, an adaptation loop using spectrum balancing technique, an on-chip bandgap reference (BGR), and a low-dropout regulator(More)
A 4-channel Vertical Cavity Surface Emitting Laser (VCSEL) driver array is designed in a 0.18μm CMOS technology. Simulated results show that each channel works at 10Gb/s (12.5Gb/s max) under a supply voltage of 1.8 V. Thus, aggregated total capacity of 40 Gb/s can be obtained from 4 channels. The power dissipation of each channel is only 50mW. To(More)
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