Analog / Mixed-Signal / RF Circuits for Complex Signal Processing

Kobayashi, Haruo; Kushita, Nene; Tran, Minh Tri; Asami, Koji; San, Hao; Kuwana, Anna; Hatta, Akemi

doi:10.1109/asicon47005.2019.8983548

Cited by 7 publications

(4 citation statements)

References 12 publications

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“…About 20 years ago, the author heard a presentation from Katholieke Universiteit Leuven group at ISSCC; there an RC polyphase filter and its curious behavior were shown. Then he analyzed it using complex signal processing and circulant matrix theories [7,18,19].…”

Section: Rc Polyphase Filter and Hilbert Filtermentioning

confidence: 99%

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How the Author's Group Came Up with Ideas in Analog/Mixed-Signal Circuit and System Area

KOBAYASHI

2024

IEICE Trans. Fundamentals

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This article reviews the author's group research achievements in analog/mixed-signal circuit and system area with introduction of how they came up with the ideas. Analog/mixed-signal circuits and systems have to be designed as well-balanced in many aspects, and coming up ideas needs some experiences and discussions with researchers. It is also heavily dependent on researchers. Here, the author's group own experiences are presented as well as their research motivations.

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Section: Rc Polyphase Filter and Hilbert Filtermentioning

confidence: 99%

“…It is also heavily dependent on researchers themselves. Here, the author's group own experiences are presented as well as their research motivations [1][2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

How the Author's Group Came Up with Ideas in Analog/Mixed-Signal Circuit and System Area

KOBAYASHI

2024

IEICE Trans. Fundamentals

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“…They need a differential amplifier to drive their differential input. The use of an integrated fully differential amplifier for modern mixed-signal [3] processing applications can provide many advantages such as: (a) increased immunity to external noise, (b) suppressed noise from power supply, (c) increased output voltage swing [4,5] for a given voltage rail, which is ideal for low-voltage systems, and (d) reduced even-order harmonics. Thus, designing a power-efficient fully differential amplifier [6] that can drive a wide range of resistive and capacitive loads is very useful for today's batteryoperated portable electronic equipment, e.g., for the Internet of Things (IoT) [7] applications.…”

Section: Introductionmentioning

confidence: 99%

Fully Differential Miller Op-Amp with Enhanced Large- and Small-Signal Figures of Merit

Paul

Ramírez-Angulo

Vázquez-Leal

et al. 2022

JLPEA

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A highly power-efficient, fully differential Miller op-amp with accurately controlled output quiescent current is introduced. The op-amp can drive both capacitive and resistive load due to the presence of the auxiliary amplifier. This amplifier helps to achieve class AB operation of the proposed op-amp. The fully differential auxiliary amplifier is compact and uses a resistive local common-mode feedback network. It consumes only 6% of the total current of the op-amp. The proposed op-amp has several innovative features. Incorporating the auxiliary amplifier helps to improve the unity gain frequency, power efficiency, slew-rate, and common-mode rejection ratio of the proposed op-amp. It can drive a wide range of resistive (200 Ω–1 MΩ) and capacitive loads (5 pF–300 pF). The op-amp has a large signal dynamic current efficiency of 8.6 and a large signal static current efficiency of 7.9. The small-signal figure of merit is 8.7 for RL = 1 MΩ and 7.3 for RL = 200 Ω.

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“…An important function of microelectronics vastly used in electronic systems is "filtering" [1]. One of the most famous active filter circuits is the Tow-Thomas bi-quadratic circuit.…”

Section: Introductionmentioning

confidence: 99%

Derivation of Loop Gain and Stability Test for Low-pass Tow-Thomas Biquad Filter

Tran¹,

Kuwana²,

Kobayashi³

2020

Computer Science &Amp; Information Technology

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Proposed derivation and measurement of self-loop function for a low-pass Tow Thomas biquadratic filter are introduced. The self-loop function of this filter is derived and analyzed based on the widened superposition principle. The alternating current conservation technique is proposed to measure the self-loop function. Research results show that the selected passive components (resistors, capacitors) of the frequency compensation of Miller's capacitors in the operational amplifier and the Tow Thomas filter can cause a damped oscillation noise when the stable conditions for the transfer functions of these networks are not satisfied.

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Analog / Mixed-Signal / RF Circuits for Complex Signal Processing

Cited by 7 publications

References 12 publications

How the Author's Group Came Up with Ideas in Analog/Mixed-Signal Circuit and System Area

How the Author's Group Came Up with Ideas in Analog/Mixed-Signal Circuit and System Area

Fully Differential Miller Op-Amp with Enhanced Large- and Small-Signal Figures of Merit

Derivation of Loop Gain and Stability Test for Low-pass Tow-Thomas Biquad Filter

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