A 9.38-bit, 422nW, high linear SAR-ADC for wireless implantable system

Velagaleti, Silpa Kesav; Nayanathara, K.S.; Madhavi, B. K.

doi:10.12928/telkomnika.v19i2.18318

Cited by 4 publications

(4 citation statements)

References 14 publications

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“…In the double bootstrap switch, the gate-source voltage is raised to twice the supply voltage. Also, the bootstrap switch followed by a dummy switch is used [3,4] for the clock feed through compensation. Te charge injected during conversion is compared with the charge induced by a dummy switch.…”

Section: Sar Sample and Hold Circuitmentioning

confidence: 99%

“…Due to their lowest number of transistors, this scheme saves both power and area. Te basic structure of the single-stage dynamic latch comparator [3,4,6,16,63,86,94] is presented in Figure 5. It consists of three sections, including the diferential amplifcation section (M1 and M2), the cross-coupled inverter section (M3:M6), and the reswitched section (S1:S4).…”

Section: Single-stage Dynamic Latchmentioning

confidence: 99%

“…Table 8 reports the performance parameters summary of the SAR ADC less than 65 nm process. To save more power, the work [3] has employed the main structures of the building blocks of SAR ADC, including a bootstrap switch followed by a dummy switch, a single-stage dynamic latch comparator, a two-stage subarray capacitor technique, and a conventional synchronous SAR logic. Furthermore, the use of downsize technology of 45 nm support can decrease the power consumption by 422.3 nW with a FOM W of 3.12 fJ/ conv.-step.…”

Section: Fom W � P Adcmentioning

confidence: 99%

“…Te demand for fnding solutions for diagnosing and treating diseases has increased with the rapid increase in requirements in medicine and healthcare systems. Biomedical applications such as medical implants and wireless sensors are becoming the most serious applications, helping monitor patients for long periods without imposing any restrictions on them [1][2][3][4]. Te architecture of a wireless body sensor network (WBSN) [5] is shown in Figure 1.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Successive Approximation Register Analog-to-Digital Converter (SAR ADC) for Biomedical Applications

Arafa

Ellaithy

Zekry

et al. 2023

Active and Passive Electronic Components

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This study presents a survey of the most promising reported SAR ADC designs for biomedical applications, stressing advantages, disadvantages, and limitations, and concludes with a quantitative comparison. Recent progress in the development of a single SAR ADC architecture is reviewed. In wearable and biosensor systems, a very small amount of total power must be devoured by portable batteries or energy-harvesting circuits in order to function correctly. During the past decade, implementation of the high energy efficiency of SAR ADC has become the most necessary. So, several different implementation schemes for the main components of the SAR ADC have been proposed. In this review study, the various circuit architectures have been explained, beginning with the sample and hold (S/H) switching circuits, the dynamic comparator, the internal digital-to-analog converter (DAC), and the SAR control logic. In order to achieve low power consumption, numerous different configurations of dynamic comparator circuits are revealed. At the end of this overview, the evolutions of DAC architecture in distinct biomedical applications today can make a tradeoff between resolution, speed, and linearity, which represent the challenges of a single SAR ADC. For high resolution, the dual split capacitive DAC (CDAC) array technique and hybrid capacitor technique can be used. Also, for ultralow power consumption, various voltage switching schemes are achieved to reduce the number of switches. These schemes can save switching energy and reduce capacitor array area with high linearity. Additionally, to increase the speed of the conversion process, a prediction-based ADC design is employed. Therefore, SAR ADC is considered the ideal solution for biomedical applications.

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Section: Sar Sample and Hold Circuitmentioning

confidence: 99%