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Continued scaling of feature sizes have led to reduction in OpAmp gain thus making it unsuitable for using in a negative feedback system. Comparator Based Switched Capacitor (CBSC) circuits have been proposed as an alternative solution to alleviate this problem. The architecture uses continuous comparators and current sources to detect the virtual ground condition at the input rather than forcing...
In this paper, a 12-bit 50MHz Pipelined Low-Voltage ADC is presented, which consists of 8-stage-pipelined low resolution ADCs and a 4-bit flash ADC. Several critical technologies are used to guarantee the resolution and high sampling and converting rate such as 1.5bits per stage conversion, digital correction logic, gain-boosted telescopic OTA and so on. Finally the whole system is taped out in SMIC...
For implantable biosensor applications which require a low-cost signal processing unit that features ultra-low power and low-voltage capability as well, this paper proposes a solution by merging switched-opamp technique and foreground digital calibration into a single 10-bit ADC. Utilization of the switched-opamp technique allows for low supply operation down to 0.7 V. The insufficient gain associated...
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