A Sinusoidal Signal Generator Using a Constant Gain Finite Impulse Response (FIR) Filter for Electrical Bioimpedance Spectroscopy

Kweon, Soon-Jae; Jo, Sung-Hun; Suh, Jung Keun; Je, Minkyu; Yoo, Hyung-Joun

doi:10.1109/iscas.2018.8351219

Cited by 9 publications

(21 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The thirdorder harmonic tone is -9 dBc, which is considered very large for most cases. Odd-order harmonics of the DAC-based sinusoid are smaller than those of the square waveform [44], [45], but they need to be attenuated further for high linearity in many cases. SSGs have adopted two types of filters: CT and DT filters.…”

Section: B Linearity Enhancementmentioning

confidence: 99%

Section: A Dac-based Sinusoidmentioning

confidence: 99%

“…Besides, in order to reduce both unit components and switching logics, DAC-based sinusoids with a small N DAC and a small OSR have been employed in spite of their large harmonics [38], [44], [45], [50], [65]- [67]. For instance, N DAC = 3 [44], [45] and 20 unit cells [65] are adopted with OSR = 16. Although the complexity and area can be reduced thanks to the reduced N DAC and OSR, these waveforms need sufficiently steep filtering to attenuate not only the sampling harmonics but also the low-order harmonics.…”

Section: A Dac-based Sinusoidmentioning

confidence: 99%

“…CT filters have been widely adopted in on-chip SSGs [35], [36], [38], [39], [44], [45], [47], [51], [52], [59], [62], [63], [73], [101], [102]. The most simple but fundamental CT filter is passive RC LPFs.…”

Section: A Linearity Enhancement In Ct Domainmentioning

confidence: 99%

“…RLC or RL filters can be used for SSGs in the board-level design, but these filters are not suitable for on-chip implementation because inductors typically require to occupy a very large chip area. A passive RC LPF is adopted in [45]. Two first-order RC LPFs are cascaded to attain a sufficient degree of attenuation of the harmonics.…”

Section: A Linearity Enhancement In Ct Domainmentioning

confidence: 99%

See 4 more Smart Citations

On-Chip Sinusoidal Signal Generators for Electrical Impedance Spectroscopy: Methodological Review

Kweon¹,

Rafi

Cheon

et al. 2022

IEEE Trans. Biomed. Circuits Syst.

Self Cite

View full text Add to dashboard Cite

This paper reviews architectures and circuit implementations of on-chip sinusoidal signal generators (SSGs) for electrical impedance spectroscopy (EIS) applications. In recent years, there have been increasing interests in on-chip EIS systems, which measure a target material's impedance spectrum over a frequency range. The on-chip implementation allows EIS systems to have low power and small form factor, enabling various biomedical applications. One of the key building blocks of on-chip EIS systems is on-chip SSG, which determines the frequency range and the analysis precision of the whole EIS system. On-chip SSGs are generally required to have high linearity, wide frequency range, and high power and area efficiency. They are typically composed of three stages in general: waveform generation, linearity enhancement, and current injection. First, a sinusoidal waveform should be generated in SSGs. The generated waveform's frequency should be accurately adjustable over a wide range. The firstly generated waveform may not be perfectly linear, including unwanted harmonics. In the following linearity-enhancement step, these harmonics are attenuated by using filters typically. As the linearity of the waveform is improved, the precision of the EIS system gets ensured. Lastly, the filtered voltage waveform is now converted to a current by a current driver. Then, the current sinusoidal signal is injected into the target impedance. This review discusses the principles, advantages, and disadvantages of various techniques applied to each step in state-of-the-art on-chip SSGs. In addition, state-of-the-art designs are compared and summarized.

show abstract

Section: B Linearity Enhancementmentioning

confidence: 99%

Section: A Dac-based Sinusoidmentioning

confidence: 99%

Section: A Dac-based Sinusoidmentioning

confidence: 99%

Section: A Linearity Enhancement In Ct Domainmentioning

confidence: 99%

Section: A Linearity Enhancement In Ct Domainmentioning

confidence: 99%

See 3 more Smart Citations

On-Chip Sinusoidal Signal Generators for Electrical Impedance Spectroscopy: Methodological Review

Kweon¹,

Rafi

Cheon

et al. 2022

IEEE Trans. Biomed. Circuits Syst.

Self Cite

View full text Add to dashboard Cite

show abstract

A 0.05%–0.08% THD, 762.9 Hz–10 MHz direct digital frequency synthesizer using a reconfigurable DAC for electrochemical impedance spectroscopy measurements

Farouk,

Dessouky,

Naguib

2024

Circuit Theory & Apps

View full text Add to dashboard Cite

SummaryA wide‐range direct digital frequency synthesizer (DDS) is considered an essential component that is used in measuring electrochemical impedance spectroscopy (EIS). Since it depends on exciting the electrochemical sensor by a pure sine wave, total harmonic distortion (THD) is considered a challenging specification for an accurate EIS measurement. This paper introduces a complete system and circuit designs of a wide range DDS with a comprehensive system model using MATLAB environment. In addition, it presents the usage of a reconfigurable digital‐to‐analog converter (DAC) on the circuit level that is used either as a 4‐bit delta‐sigma ( ) DAC or an 8‐bit binary‐weighted DAC for both low‐ and high‐frequency ranges, respectively. The designed DDS generates an output frequency range from 762.933 Hz to 10 MHz using a physical 8‐bit DAC. The circuits are simulated using 0.18 μm CMOS technology. The designed DDS system achieves THD less than 0.05% with superior free dynamic range (SFDR) 66 dBc for low‐frequency range and 0.08% with SFDR 62 dBc for high‐frequency range. The DDS circuits occupy an area of 400 × 800 μm. The whole system consumes a 2.5 mW power consumption from a 1.8 V supply.

show abstract

Sinusoidal Signal Generation Through Successive Integration

Ibrahim

Onabajo

2019

2019 IEEE International Symposium on Circuits and Systems (ISCAS)

View full text Add to dashboard Cite

A Sinusoidal Signal Generator Using a Constant Gain Finite Impulse Response (FIR) Filter for Electrical Bioimpedance Spectroscopy

Cited by 9 publications

References 11 publications

On-Chip Sinusoidal Signal Generators for Electrical Impedance Spectroscopy: Methodological Review

On-Chip Sinusoidal Signal Generators for Electrical Impedance Spectroscopy: Methodological Review

A 0.05%–0.08% THD, 762.9 Hz–10 MHz direct digital frequency synthesizer using a reconfigurable DAC for electrochemical impedance spectroscopy measurements

Sinusoidal Signal Generation Through Successive Integration

Contact Info

Product

Resources

About