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A 0.5-V 95-dB rail-to-rail DDA for biosignal processing
(2022-02-01)
Khateb, Fabian
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Kulej, Tomasz
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Kumngern, Montree
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Arbet, Daniel
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Jaikla, Winai
This paper presents a new low-voltage CMOS structure for differential difference amplifier (DDA) optimized for low frequency biosignal processing. The DDA input stage is based on a non-tailed bulk-driven (BD) differential pair offering rail-to-rail input common mode range (ICMR) under 0.5 V voltage supply. Unlike the conventional two differential pairs DDA structure, the proposed one employs one differential pair created by the multiple-input MOS transistor (MI-MOST) technique offering simple circuitry. Although the bulk-driven and the MI-MOST techniques reduce the amplifier's transconductance, the gain is boosted by increasing the output resistance using a self-cascode transistor and a partial positive feedback. As a result, a 95-dB voltage gain is achieved which is larger than achieved gain for most sub-0.5 V designs presented in the literature. The DDA has 12.66 kHz gain bandwidth product, and consumes 313nW of power. The input thermal noise is 0.88 µV/Hz<sup>1/2</sup> and the average slew-rate is 14.7 V/ms at 20pF load capacitance. As an example of application, a band-pass filter (BPF) based on two DDAs with adjustable gain for electrocardiogram (ECG) signal processing is presented. The 0.18 µm CMOS technology from TSMC has been used and extensive simulation results in Cadence environment including process, voltage and temperature corners and Monte–Carlo analysis have been carried-out to demonstrate the robustness of the design.
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A low power transmission model based UWB technology for BAN applications
(2020-07-01)
Suwan, Supakorn
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Southisombath, Khamphoui
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Promwong, Sathaporn
Low power transmission technology is ones of major concern in new wireless network (NWN) systems. The impulse radio is a potential technology to apply with body area network systems due to its transmit signal as impulse radio, which has low transmitted power. UWB gain high popular attention in short-range wireless communications development. Major kinds of application are able to used with UWB, e.g., wireless medical sensors networks, entertainment devices, and wireless localization. Information transmission in BAN systems is important for a reliable and accuracy in a actual used of medical sensors. In this research, the evaluation of UWB transmission model with human is introduce for analyze a distortion due to human body effect. The template waveform is proposed at the receiver side to achieve high level of SNR. The proposed model is very useful for the evaluation and design of wireless medical sensor networks including actual human body effect.
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A 1.1-V Low power true single-phase clock 2/3 prescaler
(2017-10-19)
Tooprakai, Siraphop
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Wisetphanichkij, Sompong
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Tudsorn, Apirak
This paper is proposed a low-power CMOS 2/3 prescaler using true single-phase technique on 45 nm CMOS technology with 1.1 V. The true-single-phase clock divider is used to achieve low power. The prescaler is capable of operating from 1 to 16 GHz. When operating at 1 GHz, it saves more power consumption compared to that of a conventional circuit and lowpower true single-phase clock CMOS 2/3 prescalers circuit operating in divide-by-2 mode and in divide-by-3 mode, respectively.
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Low-power current-mode logarithmic pipeline analog-to-digital converter for ISFET based pH sensor
(2009-12-01)
Sirimasakul, S.
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Thanachayanont, A.
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Jeamsaksiri, W.
This paper describes the design and realization of a low power current-mode logarithmic pipeline analog-to-digital converter in 0.35μm CMOS technology. The ADC is intended for conversion of sub-microampere analog output current of an ISFET based pH sensor. Subthreshold MOSFETs and the Translinear principle are exploited to achieve simple and low-power ADC realization. The ADC was simulated with a 1-V power supply voltage and dissipated 3.3 μW static power at 1-kHz clock frequency. ©2009 IEEE.
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Ultra-low-power differential ISFET/REFET readout circuit
(2009-01-01)
Thanachayanont, Apinunt
;
Sirimasakul, Silar
A novel ultra-low-power readout circuit for a pH-sensitive ion-sensitive field-effect transistor (ISFET) is proposed. It uses an ISFET/reference FET (REFET) differential pair operating in weak-inversion and a simple current-mode metal-oxide semiconductor FET (MOSFET) translinear circuit. Simulation results verify that the circuit operates with excellent common-mode rejection ability and good linearity for a single pH range from 4 to 10, while only 4 nA is drawn from a single 1 V supply voltage. © 2009 ETRI.
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Low energy optimization for MPEG-4 video encoder on ARM-based mobile phones
(2006-11-02)
Pakdeepaiboonpol, P.
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Kittitornkun, S.
Most compiler optimization techniques concern most about speed. In this paper, we present two high-level power/energy optimization methods for ARM-based battery-powered embedded multimedia systems, e.g. mobile phones, pocket PCs, personal multimedia systems, etc. The experiments using MPEG-4 simple profile level 0 (SP@LO) video encoder on ARM920T with two QCIF video sequences 15 fps, 24 kbps show that the proposed techniques can complement the existing speed-oriented ones to achieve lower energy/power consumption up to 5.7% relative to all ARM C++ optimization levels despite the 16-KB instruction and 16-KB data caches of ARM 920T core. © 2006 IEEE.
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Power optimization for mobile MPEG-4 video decoder
(2005-12-01)
Pakdeepaiboonpol, Pairoj
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Kittitornkun, Surin
Most compiler optimization techniques concern most about speed. In this paper, we present two high-level power/energy optimization methods for ARM-based battery-powered embedded multimedia systems, e.g. mobile phones, pocket PCs, personal multimedia systems, etc. The experiments using MPEG-4 simple profile level 0 (SP@LO) video decoder on ARM920T with two QCIF video sequences 15 fps, 24 kbps show that the proposed techniques can complement the existing speedoriented ones to achieve lower energy/power consumption up to 13% relative to all ARM C++ optimization levels despite the 16KB Instruction and 16-KB data caches of ARM 920T core. © 2005 IEEE.

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