A Novel High Performance Atto-Ampere Current Mirror

Baghtash, Hassan Faraji; Monfaredi, Khalil; Azhari, Seyed Javad

doi:10.1109/icsap.2010.16

Cited by 5 publications

(8 citation statements)

References 7 publications

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“…Power saving is usually achieved by reducing the supply voltage. While supply voltage reduction is currently limited to some tenths of volts, favorably, circuits operating with currents as low as femtoamperes are reported so far [3][4][5][6][7][8]. Comparing limited supply voltage reduction capability with the remarkably large reduction factor obtainable for the currents, it is concluded that by reducing the circuit's currents, much smaller power consumption can be achieved.…”

Section: Bias Circuit and Nanocurrent Source Arraysmentioning

confidence: 99%

“…So far, power reduction techniques mostly concentrate on reduction of voltages, but the extent of voltage reduction is narrow and cannot result to noticeable power reduction. Meanwhile, the current can be reduced to nanovalues and beyond (femto and atto) [3,4], promising extra significant reduction in power down to nanowatts and less [5]. These methods thus deserve much more approach as such in this paper.…”

Section: Introductionmentioning

confidence: 99%

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A 12-bit, low-voltage, nanoampere-based, ultralow-power, ultralow-glitch current-steering DAC for HDTV

2012

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In this paper, a novel 12-bit current-steering binary-weighted digital-to-analog converter (DAC) based on nanoampere bits is designed and modified for high-definition television (HDTV) applications. As a part of a widely used consumer appliance, it is aimed to be such designed to consume power as low as possible. Hence, as a distinguished idea, prime concentration is focused on the reduction of the currents providing the bits of the proposed DAC. To do this, current mirrors operating in the weak inversion region are arranged to establish the least significant bit (LSB) current as low as 10 nA while the power supply is also reduced to 1 V, resulting to an ultralow power of 52.9 μW. Many other powerful ideas are then deliberately combined to maintain both high speed and very low glitches required for HDTV application despite those ultralow currents and power. The result is a speed of 100 MS/s, an ultralow glitch of ≃10.91 fAs, |INL| ≤ 0.988 LSB, |DNL| ≤ 0.99 LSB, and a spurious-free dynamic range of ≃73 dB. These results caused the proposed DAC to execute a distinguished overall performance (defined as figure of merit) greatly better than some other advanced ones by outstanding ratios of 77 to 277,185. Hspice simulations with the SMIC 0.18-μm complementary metal-oxide semiconductor technology have been used to validate the proposed circuit. Performance evaluation of the proposed DAC versus Monte Carlo simulations and also a wide range of temperature variations proved both its well mismatch insensitivity and thermal stability.

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Section: Bias Circuit and Nanocurrent Source Arraysmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A 12-bit, low-voltage, nanoampere-based, ultralow-power, ultralow-glitch current-steering DAC for HDTV

2012

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“…Total current versus signal current is defined by the authors as a power figure of merit (PFOM) to fairly compare the power performance of the proposed current mirror with the previously reported artworks [2,11]. The total current is considered as the overall current drawn from the power supply while the signal current is the current flown from the current mirror which is denoted as I in in Fig.…”

Section: Principle Of Operationmentioning

confidence: 99%

“…Furthermore the circuit proposed in [22] uses an extra op-amp and two shift voltages with values about 0.8 and 0.9 volt, which prohibits using the circuits in low-voltage applications and also results in higher chip area and power consumption. To pursue ongoing effort of other researchers to design ultra-low-current and power current mirrors a very low-power current mirror is proposed capable of operating at extremely low currents down to 0.4 aA using source voltage modulation technique [2,11]. Besides, avoiding extra circuitry resulted in lower chip area and very low-power consumption of 1.5 µW.…”

Section: Introductionmentioning

confidence: 99%

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A Novel Ultra-Low-Power Low-Voltage Femto-Ampère Current Mirror

Monfaredi

Baghtash

Azhari

2011

Circuits Syst Signal Process

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A novel femto-ampère current mirror/negative impedance converter (FACMNIC) is proposed in this paper. It is shown that extremely large output impedance approaching infinite value and also negative impedances of different values can be remarkably obtained just by adjusting the built-in positive feedback loop gain. Operation of this circuit is based on two approaches called here as source voltage shifting and channel conduction manipulation. Although those two techniques are briefly explained in this paper but due to their strong action worth extensively studying and exercising. Deliberately having been composed of both current mirror and negative impedance converter capabilities in the same structure causes the proposed circuit to have a simple structure prohibiting large chip area consumption while favorably preserves following unique features. At 0.9 volt power supply it produces very small currents down to 4.6 fA and consumes an ultra-low power of 86 nW, thus it is the best choice for Ultra-Low-Power Low-Voltage (ULPLV) applications. It also exhibits the outstanding high output impedance of 400 G when it is optimized for best performance operation, otherwise it can be adjusted so as to produce very high output impedances (approaching infinite values). Due to the inclusion of positive feedback, Monte Carlo analyses are performed to ensure the stability and robustness of the circuit's operation in the presence of the PVT (process, voltage and temperature) variations. Simulation results in TSMC 0.18 µm CMOS technology

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A Novel Ultra-Low-Power, Low-Voltage, Ultra-High Output Resistance and Uniquely High Bandwidth Femto-Ampere Current Mirror

Azhari

Nickhah

2017

Circuits Syst Signal Process

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A Novel High Performance Atto-Ampere Current Mirror

Cited by 5 publications

References 7 publications

A 12-bit, low-voltage, nanoampere-based, ultralow-power, ultralow-glitch current-steering DAC for HDTV

A 12-bit, low-voltage, nanoampere-based, ultralow-power, ultralow-glitch current-steering DAC for HDTV

A Novel Ultra-Low-Power Low-Voltage Femto-Ampère Current Mirror

A Novel Ultra-Low-Power, Low-Voltage, Ultra-High Output Resistance and Uniquely High Bandwidth Femto-Ampere Current Mirror

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