Damping-factor-control frequency compensation technique for low-voltage low-power large capacitive load applications

Leung, Anthony Kwan; Mok, Philip K. T.; Ki, Wing Hung; Sin, J.K.O.

doi:10.1109/isscc.1999.759173

Cited by 31 publications

(17 citation statements)

References 3 publications

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“…The reference buffers based on multi-stage amplifiers can enhance the precision under low-voltage supplies, but are exposed to instability when loaded by such large capacitive loads (C L ). Frequency compensation via damping-factor control [2] is capable of extending the C L -drivability up to 1nF, however, at the cost of penalizing the power (426µW) and area (0.14mm 2 ). Although recent works [3][4] have enhanced gain-bandwidth product (GBW) and slew rate (SR) showing better FOM S (=GBW•C L /Power) and FOM L (=SR•C L /Power), the C L -drivability has not been improved (i.e., 0.8nF in [3] and 0.15nF in [4]).…”

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confidence: 99%

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Correction to "A 0.016 mm² 144-µW Three-Stage Amplifier Capable of Driving 1-to-15 nF Capacitive Load With >0.95-MHz GBW"

Zhang

Mak

Law

et al. 2013

IEEE J. Solid-State Circuits

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confidence: 99%

“…Design of frequency compensation classically hinges on the analysis of amplifier's transfer function H(s) once a potential topology is conceived [2][3][4]. Yet, the involvements cannot explicitly relate the impact of each circuit element to the pole-zero composition of H(s).…”

mentioning

confidence: 99%

Correction to "A 0.016 mm² 144-µW Three-Stage Amplifier Capable of Driving 1-to-15 nF Capacitive Load With >0.95-MHz GBW"

Zhang

Mak

Law

et al. 2013

IEEE J. Solid-State Circuits

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“…Finally, ACBC is known as one of the best techniques for frequency compensation. In this method, the second‐stage gain is increased in high frequency, therefore, improving the overall frequency response of an OTA [9, 14, 16‐35] …”

Section: Introductionmentioning

confidence: 99%

“…In this method, the second-stage gain is increased in high frequency, therefore, improving the overall frequency response of an OTA [9,14,[16][17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35]. 9,14,[16][17][18][19][20][21][22] In this article, a new compensation technique is proposed. It uses a fully differential feedback path to remove the feedforward path and enhance the frequency response regarding PM and GBW.…”

Section: Introductionmentioning

confidence: 99%

Multistage operational transconductance amplifier frequency compensation technique based on fully differential feedback stage

Zanjani

Khatib

Chabok

2019

Int J Numerical Modelling

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In this article, a new configuration of a three-stage Complementary metaloxide-semiconductor (CMOS) operational transconductance amplifier (OTA) isproposed. It removes the feedforward path while simultaneously amplifying the feedback path in the compensation network. Also, the proposed circuit uses only one small compensation capacitor which makes it appropriate regarding die area. The approach behind is demonstrated through a successful design using 0.18-μm CMOS technology. In fact, the simulated OTA shows better performance in comparison with other methods and achieved 20.2 MHz, 82 , and 124 dB as gain-bandwidth product, phase margin, and DC gain, respectively, and consumes 545 μW @ 1.8 V. K E Y W O R D S

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“…Since buck converter using single-end inductor circuit is most widely used in the mobile phone application [6,[38][39][40][41], this research work will target this type of converter to explain and demonstrate the concepts.…”

Section: Introduction To Voltage Regulatormentioning

confidence: 99%

Analysis and design of a highly efficient and versatile DC-DC converter

Yu¹

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I would like to express my sincere gratitude to my supervisor, Dr. Siek Liter, for his patience and encouragement throughout my research work. His guidance and advices helped to overcome many difficulties that I faced during my research. Next, I am grateful to Panasonic and Qualcomm for the support that I have received for my research in Nanyang Technological University of Singapore (NTU). Throughout the program, I am glad to have the opportunity to collaborate with numerous researchers, especially Chew Kin Wai Roy, Sun Zhuochao, Howard Tang, Kok Chiang Liang, Zhu Di and many more. Many ideas and solutions have come from mutual sharing sessions and discussions. I would also like to thank the staffs in VIRTUS and VLSI labs of NTU for their kind assistance in providing a conducive environment for research and to conduct laboratory measurements. Last but not least, I would like to express my gratitude to my family members for their utmost support and understanding for my pursuit in this research work.

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Damping-factor-control frequency compensation technique for low-voltage low-power large capacitive load applications

Cited by 31 publications

References 3 publications

Correction to "A 0.016 mm² 144-µW Three-Stage Amplifier Capable of Driving 1-to-15 nF Capacitive Load With >0.95-MHz GBW"

Correction to "A 0.016 mm² 144-µW Three-Stage Amplifier Capable of Driving 1-to-15 nF Capacitive Load With >0.95-MHz GBW"

Multistage operational transconductance amplifier frequency compensation technique based on fully differential feedback stage

Analysis and design of a highly efficient and versatile DC-DC converter

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