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In recent years, we have seen the emergence of multi-GS/s medium-to-high-resolution ADCs. Presently, SAR ADCs dominate low-speed applications and time-interleaved SARs are becoming increasingly popular for high-speed ADCs [1,2]. However the SAR architecture faces two key problems in simultaneously achieving multi-GS/s sample rates and high resolution: (1) the fundamental trade-off of comparator noise...
We present a direct sampling full-band capture receiver for cable and digital TV applications. It consists of a 28nm CMOS ADC-based direct sampling receiver and a 0.18um BiCMOS LNA. It is capable of receiving 158 channels from 48MHz to 1000MHz simultaneously, achieving up to 10Gb/s data throughput, while exceeding DOCSIS requirements. The CMOS receiver occupies 1mm2 area while consuming 300mW. The...
The recent emergence of direct sampling in residential broadband satellite and cable receivers has spurred the need for low-power, high-speed (∼5GS/s), mid-resolution (∼10b) A/D converters. Recently, time-interleaved (TI) SARs have been a popular choice for low-power, medium-speed, mid-resolution ADCs [1-3]. As the conversion rate and resolution requirements increase, TI-SARs become less attractive...
This paper presents a 40-Gb/s phase-locked clock and data recovery (CDR) circuit with 1:4 demultiplexer in IBM 90-nm CMOS technology. The CDR circuit incorporates an inductorless eight-phase LC voltage-controlled oscillator (VCO) and a quarter-rate bang-bang phase detector (PD). A novel inductorless eight-phase LC VCO including four LC oscillator cells is presented to generate the eight-phase outputs...
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