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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...
A 1.5 V low-power stereo audio codec in 0.13 m CMOS is described. The microphone path includes a programmable gain stage with an enhanced transconductance cell followed by a continuous-time ADC with capacitive feed-forward and capacitive direct feedback. The speaker path employs a 1 mA Class-AB speaker amplifier with an improved quiescent current control circuit that delivers 30...
A 1.5 V stereo audio CODEC in 0.13 μm CMOS demonstrates circuit techniques that minimize power consumption for microphone and speaker interfaces. The CODEC includes a 0.35 mA microphone PGA, a 0.35 mA continuous-time ΔΣ ADC and a 1 mA Class-AB speaker amplifier. The audio input and output paths achieve 92 dB and 98 dB SNR, respectively, with 6.5 mA total stereo current.
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