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This paper describes a 25-Gb/s energy-efficient CMOS optical receiver with high input sensitivity. By incorporating a current boosting preamplifier with time-interleaved integrating-type optical receiver, it also circumvents CID issue with high PD bandwidth tolerance. Experimental results show that the receiver can achieve 25-Gb/s operation by integrating with a 9-GHz or 17-GHz GaAs PD. Input sensitivities...
This paper describes a single-chip, 2 × 20-Gb/s time-interleaved integrating-type optical receiver. Combining with correlation-based timing recovery and 1:4 demultiplexer, it achieves a high energy efficiency of 1.2-pJ/bit. By incorporating the proposed alternating photodetector (ALPD) current-sensing scheme, the front-end receiver is 4-way time-interleaved to increase input sensitivity and relax...
This paper presents a conditional capacitor averaging technique to enhance the linearity of 2.5-bit/stage high-resolution pipelined ADCs with capacitor mismatch. Design concepts of capacitor averaging and sorting techniques are employed to mitigate the error effect of capacitor mismatch. Moreover, the sorted capacitors and digital-to-digital converter (DAC) voltages in a 2.5-bit multiplying analog-to-digital...
This paper presents a 10 b SAR ADC with a binary-scaled error compensation technique. The prototype occupies an active area of 155 ?? 165 ??m2 in 65 nm CMOS. At 100 MS/S, the ADC achieves an SNDR of 59.0 dB and an SFDR of 75.6 dB, while consuming 1.13 mW from a 1.2 V supply. The FoM is 15.5 fJ/conversion-step.
In this brief, a split-capacitor correlated double sampling (SC-CDS) technique is proposed to improve the performance of CDS. Using the proposed technique, low-gain operational amplifiers (op-amps) can be employed to implement a low-power pipelined analog-to-digital converter (ADC). A power-efficient class-AB pseudodifferential op-amp and its corresponding integrator-based common-mode stabilization...
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