An ultra low-voltage, ultra low-power DTMOS-based CCII design for speech processing filters

Uygur, Atilla; Kuntman, Hakan

doi:10.1109/eleco.2013.6713930

Cited by 13 publications

(6 citation statements)

References 13 publications

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“…Table 2 shows the performance comparison of the proposed BPF with some previous works [24], [28], [29], [30], [31], [35], [37], [38]. Compared with BPFs that can control gain and bandwidth in [28] and [29], the proposed circuit clearly has lower power consumption.…”

Section: Simulation Resultsmentioning

confidence: 99%

“…Some low-voltage and low-power analog devices using non-conventional techniques are reported in literature, including the op-amp [6], [7], [8], [9], OTA [10], [11], [12], [13], [14], DDA [15], [16], [17], [18], [20], [39], [40], and second-generation current conveyor (CCII) [19], [20], [21], [22]. Low-voltage and low-power analog circuits can be applied to biosignal processing; analog filters are an example of this application [23], [24], [25], [26], [27], [28], [29], [30], [31], [32], [33], [34], [35], [36], [37], [38]. In [28], [29], [30], [31], [32], [33], [34], [35], [36], [37], and [38], BPFs suitable for applications in biomedical systems have been proposed.…”

Section: Introductionmentioning

confidence: 99%

“…Low-voltage and low-power analog circuits can be applied to biosignal processing; analog filters are an example of this application [23], [24], [25], [26], [27], [28], [29], [30], [31], [32], [33], [34], [35], [36], [37], [38]. In [28], [29], [30], [31], [32], [33], [34], [35], [36], [37], and [38], BPFs suitable for applications in biomedical systems have been proposed. However, some of these BPFs suffer from highpower consumption [28], [29], [30], [31], [32], [35], [36], [37], [38], cannot control voltage gain [30], [31], [32], [33], [34], [35], [37], [38], or cannot control the higher and lower cutoff frequencies [29], [30], [31],…”

Section: Introductionmentioning

confidence: 99%

“…In [28], [29], [30], [31], [32], [33], [34], [35], [36], [37], and [38], BPFs suitable for applications in biomedical systems have been proposed. However, some of these BPFs suffer from highpower consumption [28], [29], [30], [31], [32], [35], [36], [37], [38], cannot control voltage gain [30], [31], [32], [33], [34], [35], [37], [38], or cannot control the higher and lower cutoff frequencies [29], [30], [31], [32], [33], [34], [35], [36], [37], [38].…”

Section: Introductionmentioning

confidence: 99%

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31.3 nW, 0.5 V Bulk-Driven OTA for Biosignal Processing

2023

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This paper presents a new extremely low-voltage low-power bulk-driven (BD) operational transconductance amplifier (OTA) realized for low frequency biosignal processing. The CMOS structure of the OTA utilizes bulk-driven and self-cascode techniques in the subthreshold region, supporting the operation with the supply voltage (V DD ) as the threshold voltage (V TH ) of a single MOS transistor, i.e., V DD = V TH = 0.5 V, while offering nano power consumption (31.3 nW for 15 nA nominal setting current). Using the extremely low-voltage and low-power OTA in biosignal processing enables extending the lifetime of applications that are powered by battery or energy harvesting sources. The OTA has a 54.7 dB low frequency gain, 6.18 kHz gain bandwidth and 75 • phase margin at 15 pF load capacitance. The proposed OTA has been used to realize a bandpass filter (BPF) with adjustable gain for electrocardiogram (ECG) signal processing. The higher cutoff frequency of the BPF is adjustable electronically by a setting current and the BPF's gain can be adjusted by capacitors value. The total harmonic distortion (THD) of the BPF is −53.56 dB, the input integrated input-referred voltage noise is 17.9 µV rms , the common mode rejection ratio (CMRR) is 75 dB and the power supply rejection ratio (PSRR) is 87.7 dB. The BPF was designed in the Cadence program using 0.18 µm CMOS technology from TSMC. The simulation results agree with the presented theory.INDEX TERMS Operational transconductance amplifier (OTA), bulk-driven, band-pass filter, low-voltage, low-power CMOS. FABIAN KHATEB received the M.Sc. and Ph.D. degrees in electrical engineering and communication and the M.Sc. and Ph.D. degrees in business and management from the

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Section: Simulation Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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31.3 nW, 0.5 V Bulk-Driven OTA for Biosignal Processing

2023

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“…The circuit is the CCII circuit from the publication [12] where it is preliminarily described. Additional simulation results for the current conveyor and filter application, more detailed explanations and further mathematical derivations are given in this extended version.…”

Section: Introductionmentioning

confidence: 99%

A very compact, 0.4 V DTMOS CCII employed in an audio-frequency filter

Uygur

Kuntman

2014

Analog Integr Circ Sig Process

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This paper presents an ultra low-voltage, ultra low-power, very compact, dynamic threshold voltage MOS transistor (DTMOS)-based CCII circuit. The proposed circuit is capable of operating under ± 0.2 V symmetric supply voltages. The circuit topology is very compact and consists of only four DTMOS transistors and four ordinary NMOS transistors. The total power consumption of the circuit is found as only 214 nW while all transistors are working in the subthreshold region. The current conveyor has 570 kHz 3 dB-bandwidth from X to Y terminal for the voltage gain and has low, 0.2 % following error between these terminals for inputs not exceeding ± 60 mV. TSMC 0.18 lm process technology parameters are used in the design of the proposed CCII block which is then employed in an audio-frequency, second-order, band-pass filter configuration where real speech signals are fed to the input of the filter to further investigate its characteristics. Close agreement is found between theoretical study and simulated responses.

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DTMOS-Based Ultra-Low-Voltage Low-Power Circuit Design

Kuntman

Ozenli

2022

Analog Circuits and Signal Processing

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An ultra low-voltage, ultra low-power DTMOS-based CCII design for speech processing filters

Cited by 13 publications

References 13 publications

31.3 nW, 0.5 V Bulk-Driven OTA for Biosignal Processing

31.3 nW, 0.5 V Bulk-Driven OTA for Biosignal Processing

A very compact, 0.4 V DTMOS CCII employed in an audio-frequency filter

DTMOS-Based Ultra-Low-Voltage Low-Power Circuit Design

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