A 20MHz Bandwidth Band-Pass Noise-Shaping SAR ADC With OPAMP Sharing Switched-Capacitor Filter

Li, Shuai; Diao, Jianguo; Wu, Yimin; Ye, Fan; Ren, Junyan

doi:10.1109/mwscas.2019.8885154

Cited by 4 publications

(1 citation statement)

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“…For a sampling rate of 40 MS/s, the linearity performance is DNL within +0.72/−0.45 LSB, and INL +0.68/−0.7 LSB. To achieve better noise suppression and therefore increase the resolution, Li et al [38] proposed a SAR ADC based on time interleaving, as shown in Figure 5a. Compared with fully-passive noise shaping SAR ADC, the total capacitance in the circuit is reduced by about four times because a high efficiency operational amplifier with a shared switched capacitor filter is used to replace the capacitors.…”

Section: Sar Adcmentioning

confidence: 99%

A Survey on Analog-to-Digital Converter Integrated Circuits for Miniaturized High Resolution Ultrasonic Imaging System

et al. 2022

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As traditional ultrasonic imaging systems (UIS) are expensive, bulky, and power-consuming, miniaturized and portable UIS have been developed and widely utilized in the biomedical field. The performance of integrated circuits (ICs) in portable UIS obviously affects the effectiveness and quality of ultrasonic imaging. In the ICs for UIS, the analog-to-digital converter (ADC) is used to complete the conversion of the analog echo signal received by the analog front end into digital for further processing by a digital signal processing (DSP) or microcontroller unit (MCU). The accuracy and speed of the ADC determine the precision and efficiency of UIS. Therefore, it is necessary to systematically review and summarize the characteristics of different types of ADCs for UIS, which can provide valuable guidance to design and fabricate high-performance ADC for miniaturized high resolution UIS. In this paper, the architecture and performance of ADC for UIS, including successive approximation register (SAR) ADC, sigma-delta (Σ-∆) ADC, pipelined ADC, and hybrid ADC, have been systematically introduced. In addition, comparisons and discussions of different types of ADCs are presented. Finally, this paper is summarized, and presents the challenges and prospects of ADC ICs for miniaturized high resolution UIS.

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Section: Sar Adcmentioning

confidence: 99%