A 65nm Continuous-Time Sigma-Delta Modulator With Limited OTA DC Gain Compensation

González-Díaz, Víctor R.; Pareschi, Fabio

doi:10.1109/access.2020.2975601

Cited by 8 publications

(3 citation statements)

References 16 publications

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“…An amount of information that has been attained from intensity noise can be utilized in numerous dimensions [2], [15], [16]. In terms of lasers, this information paves ways to fabricate and characterize the functional properties like wavelength modulation of the said device [11], [12], [17], [18]. Likewise, the power sharing phenomenon during mode hopping could be deeply analyzed in the lasers which have the capability to operate in multiple wavelengths (multimode operation), just like a tunable lasing device [15].…”

Section: Introductionmentioning

confidence: 99%

Highly Sensitive Microsensor Based on Absorption Spectroscopy: Design Considerations for Optical Receiver

et al. 2020

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The development of a biomedical sensor involves an extremely sensitive optoelectronics system whose foundations lie on intracavity absoprtion spectroscopy. In order to make it convenient for technical reasons to use this application based utility, we implement dual mode competition. All of the components in this system must be investigated in detail. This work concerns with the design of the optical receiver which is mandatory to understand and analyze the received signal. This has been effectively done by designing an inexpensive system which replaces the existing Agilent based setup. Next, the performance of the system has been investigated by using an important parameter Relative Intensity Noise (RIN). The variation of injection current and temperature and their subsequent effect on RIN has been comprehensively examined. This has been enhanced by an investigation of RIN as subject to the mode positions (values of wavelengths) at which the framework is being operated. Through these considerations, the system's behaviour is understood in a much better way as they lead to an improvement in the sensor's realization with high sensitivity and stability.

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Section: Introductionmentioning

confidence: 99%

Highly Sensitive Microsensor Based on Absorption Spectroscopy: Design Considerations for Optical Receiver

et al. 2020

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“…Figure 1 shows the block diagram of a second order discrete-time sigma-delta modulator that is widely used for various applications due to its high power/area efficiency and good stability [14,15]. The circuit level sigma-delta modulator can be divided into analog and digital blocks.…”

Section: Sigma-delta Modulator Non-idealitiesmentioning

confidence: 99%

Macro Model for Discrete-Time Sigma‒Delta Modulators

Lee

2022

Electronics

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This work presents a macro model for discrete-time sigma‒delta modulators, which can significantly reduce the simulation time compared to transistor level circuits. The proposed macro model is realized by effectively combining active and passive ideal circuit components with Verilog-A modules. As such, since the macro model is a true representation of the actual transistor level circuit, a moderately good accuracy can be obtained. In addition, the proposed macro model includes the major amplifier, comparator, and switch‒capacitor non-idealities of the sigma‒delta modulator such as amplifier DC gain, GBW, slewrate, comparator bandwidth, hysteresis, parasitic capacitance, and switch-on resistance. The results show the simulation time of the proposed macro model sigma‒delta modulator is only 6.43% of the transistor level circuit with comparable accuracy. As a result, the proposed macro model can facilitate the circuit design and leverage non-ideality analysis of discrete-time sigma‒delta modulators. As a practical design example, a second order discrete-time sigma‒delta modulator with a five-level quantizer is realized using the propose macro model for GSM and WCDMA applications.

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“…One of the low noise design methods is enlarging the input transistors of the OpAmp to reduce the flicker noise, thereafter it may decrease OpAmp's unity gain-bandwidth. Negative impedance technique is a proper solution for DCR to reduce 1/f noise and improve linearity [8,18,19], which can be used [20,21,22,23]. However, the added noise of negative impedance reveals to be a problem.…”

Section: Introductionmentioning

confidence: 99%

A 0.1-1.9GHz 65nm CMOS variable-gain mixer-first receiver with DSA and noise-shaping TIA

Song¹,

Wang²,

Liu³

et al. 2023

IEICE Electron. Express

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In this letter, we proposed a highly linear mixer-first receiver with a discrete-step attenuator (DSA) and a noise-shaping TIA. A resistor-reuse technique is devoted to improving linearity and attenuation flatness of the DSA with frequency independance, and a negative impedance chopping method is proposed to reduce the in-band noise of the TIA. Measurement results show that the receiver achieves > 13 dBm IIP3 and in-band noise floor has been depressed by 4 dB, with only consuming 2.82 mW under 1.3 V supply.

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A 65nm Continuous-Time Sigma-Delta Modulator With Limited OTA DC Gain Compensation

Cited by 8 publications

References 16 publications

Highly Sensitive Microsensor Based on Absorption Spectroscopy: Design Considerations for Optical Receiver

Highly Sensitive Microsensor Based on Absorption Spectroscopy: Design Considerations for Optical Receiver

Macro Model for Discrete-Time Sigma‒Delta Modulators

A 0.1-1.9GHz 65nm CMOS variable-gain mixer-first receiver with DSA and noise-shaping TIA

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