The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
저전력 광대역 활성 RC 필터를 위한 새로운 자동 품질 계수(Q) 조정 방식이 제시됩니다. Q-튜닝은 광대역 활성 RC 필터의 전력 소비를 줄이는 데 효과적이지만 Q-튜닝은 일반적으로 크기 고정 루프(MLL)에 의존하기 때문에 몇 가지 문제가 있습니다. MLL은 진폭 검출 회로로 인해 정확하지 않으며, 복잡성으로 인해 점유 면적과 소비 전력이 커지는 경향이 있습니다. 또한, 고정된 정확한 주파수를 갖는 참조신호가 요구되기 때문에 참조신호에 대한 유연성이 문제가 될 수 있다. 이러한 문제를 해결하기 위해 우리는 MLL이 필요하지 않은 Q-튜닝 방식을 제안한다. 따라서 제안된 Q-튜닝 방식은 우수한 정확도, 작은 다이 면적, 낮은 전력 소비 및 기준 신호에 대한 유연성을 갖습니다. 제안된 방식에서 Q는 적분기의 위상을 90도로 조정하여 조정됩니다. 적분기의 위상은 발진주파수에서 정확히 90도의 위상차가 발생하므로 5단 링 적분기의 발진주파수를 필터의 차단주파수로 검출하고 제어함으로써 적분기의 위상을 조정한다. 주파수는 각각 카운터와 가변 저항기에 의해 쉽게 감지되고 제어됩니다. 0.13차 Chebyshev LPF를 갖춘 Q-튜닝 회로는 0.12μm CMOS 기술로 구현됩니다. 튜닝 회로는 XNUMXmm를 차지합니다.2 2.6V 공급에서 1.2mW를 소비합니다.
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부
Shouhei KOUSAI, Mototsugu HAMADA, Rui ITO, Tetsuro ITAKURA, "A Novel Automatic Quality Factor Tuning Scheme for a Low-Power Wideband Active-RC Filter" in IEICE TRANSACTIONS on Fundamentals,
vol. E92-A, no. 2, pp. 411-420, February 2009, doi: 10.1587/transfun.E92.A.411.
Abstract: A novel automatic quality factor (Q) tuning scheme for an low-power and wideband active-RC filter is presented. Although Q-tuning is effective to reduce the power consumption of wideband active-RC filters, there are several problems since the Q-tuning normally relies on a magnitude locked loop (MLL). MLL is not accurate due to the amplitude detection circuits, and occupied area and power consumption tends to be large due to its complexity. In addition, flexibility to the reference signal may be the problem, since the reference signal which has a fixed accurate frequency is required. In order to solve these problems, we propose a Q-tuning scheme, which does not require a MLL. Therefore, proposed Q-tuning scheme has good accuracy, small die area, low power consumption and flexibility to the reference signal. In our proposed scheme, Q is tuned by adjusting the phase of an integrator to 90 degrees. The phase of an integrator is adjusted by detecting and controlling the oscillation frequency of a two-stage ring-integrator to the cutoff frequency of a filter, since the phase shift of an integrator is exactly 90 degrees at the oscillation frequency. The frequency is easily detected and controlled by counters and variable resistors, respectively. The Q-tuning circuit with a 5th-order Chebyshev LPF is implemented in a 0.13 µm CMOS technology. The tuning circuit occupies 0.12 mm2 and consumes 2.6 mW from 1.2 V supply.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/transfun.E92.A.411/_p
부
@ARTICLE{e92-a_2_411,
author={Shouhei KOUSAI, Mototsugu HAMADA, Rui ITO, Tetsuro ITAKURA, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={A Novel Automatic Quality Factor Tuning Scheme for a Low-Power Wideband Active-RC Filter},
year={2009},
volume={E92-A},
number={2},
pages={411-420},
abstract={A novel automatic quality factor (Q) tuning scheme for an low-power and wideband active-RC filter is presented. Although Q-tuning is effective to reduce the power consumption of wideband active-RC filters, there are several problems since the Q-tuning normally relies on a magnitude locked loop (MLL). MLL is not accurate due to the amplitude detection circuits, and occupied area and power consumption tends to be large due to its complexity. In addition, flexibility to the reference signal may be the problem, since the reference signal which has a fixed accurate frequency is required. In order to solve these problems, we propose a Q-tuning scheme, which does not require a MLL. Therefore, proposed Q-tuning scheme has good accuracy, small die area, low power consumption and flexibility to the reference signal. In our proposed scheme, Q is tuned by adjusting the phase of an integrator to 90 degrees. The phase of an integrator is adjusted by detecting and controlling the oscillation frequency of a two-stage ring-integrator to the cutoff frequency of a filter, since the phase shift of an integrator is exactly 90 degrees at the oscillation frequency. The frequency is easily detected and controlled by counters and variable resistors, respectively. The Q-tuning circuit with a 5th-order Chebyshev LPF is implemented in a 0.13 µm CMOS technology. The tuning circuit occupies 0.12 mm2 and consumes 2.6 mW from 1.2 V supply.},
keywords={},
doi={10.1587/transfun.E92.A.411},
ISSN={1745-1337},
month={February},}
부
TY - JOUR
TI - A Novel Automatic Quality Factor Tuning Scheme for a Low-Power Wideband Active-RC Filter
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 411
EP - 420
AU - Shouhei KOUSAI
AU - Mototsugu HAMADA
AU - Rui ITO
AU - Tetsuro ITAKURA
PY - 2009
DO - 10.1587/transfun.E92.A.411
JO - IEICE TRANSACTIONS on Fundamentals
SN - 1745-1337
VL - E92-A
IS - 2
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - February 2009
AB - A novel automatic quality factor (Q) tuning scheme for an low-power and wideband active-RC filter is presented. Although Q-tuning is effective to reduce the power consumption of wideband active-RC filters, there are several problems since the Q-tuning normally relies on a magnitude locked loop (MLL). MLL is not accurate due to the amplitude detection circuits, and occupied area and power consumption tends to be large due to its complexity. In addition, flexibility to the reference signal may be the problem, since the reference signal which has a fixed accurate frequency is required. In order to solve these problems, we propose a Q-tuning scheme, which does not require a MLL. Therefore, proposed Q-tuning scheme has good accuracy, small die area, low power consumption and flexibility to the reference signal. In our proposed scheme, Q is tuned by adjusting the phase of an integrator to 90 degrees. The phase of an integrator is adjusted by detecting and controlling the oscillation frequency of a two-stage ring-integrator to the cutoff frequency of a filter, since the phase shift of an integrator is exactly 90 degrees at the oscillation frequency. The frequency is easily detected and controlled by counters and variable resistors, respectively. The Q-tuning circuit with a 5th-order Chebyshev LPF is implemented in a 0.13 µm CMOS technology. The tuning circuit occupies 0.12 mm2 and consumes 2.6 mW from 1.2 V supply.
ER -