A 6.13 µW and 96 dB CMOS Exponential Generator

Al-Tamimi, Karama M.; Al-Absi, Munir A.

doi:10.1109/tvlsi.2013.2292093

Cited by 16 publications

(12 citation statements)

References 14 publications

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“…In addition, To prove the efficiency of the circuit, frequency response is provided. Since some reported works work in subthreshold region [10][11][12][13], and some others have complex structure [11], [15], [21], thus their bandwidth is limited, while in this work all of the transistors are biased in the saturation region. Frequency response of the EXPFG circuit in Fig.…”

Section: Post Layout Simulation Resultsmentioning

confidence: 99%

“…The most important aspects of EXPFG circuits include output dynamic range, linearity of the output in dB, accuracy, power consumption, and area efficiency. In the following, the literature review verified that most of the above mentioned parameters have a trade off with each other, and then different design techniques have been presented [10][11][12][13][14][15][16][17][18][19][20][21] to satisfy the compromise between the characteristics.…”

Section: Among These Computational Circuits Exponentialmentioning

confidence: 89%

“…The second group is based on the MOS transistor which employs exponential current-voltage characteristic of the transistor in subthreshold region. However, the poor circuit frequency response and narrow input dynamic range are the disadvantages of this method, which originates from very small drain currents for charging and discharging of the transistor parasitic capacitances [10][11][12][13].…”

Section: Among These Computational Circuits Exponentialmentioning

confidence: 99%

“…Higher-order terms proposed in [20] benefit from higher dynamic range in comparison with above mentioned methods, at the cost of complex implemented circuits and lack of area efficiency which leads to increasing in power dissipation. Beside these classifications, designing the circuit with single power supply is preferred to those in dual mode; while the circuits reported in [7], [10], [13][14][15], [18], [19] require dual supply voltages. In conclusion, a circuit with wide dynamic range, high accuracy and low power consumption is expected as a further work.…”

Section: Among These Computational Circuits Exponentialmentioning

confidence: 99%

“…Ref. [10] benefits from high dB gain, but it needs double power supply, and also its bandwidth and output range are limited to 0.105 MHz and ±48 dB respectively, while our proposed circuit range is 0 to 78 dB. Note that Refs.…”

Section: Number Of Samplesmentioning

confidence: 99%

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Wide Range High Precision CMOS Exponential Circuit Based on Linear Least Squares Approach

Saatlo¹,

Özoğuz²

2018

RADIOENGINEERING

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A new strategy to implement exponential circuit in CMOS technology is presented in this paper. The proposed method is based on the new approximation function optimized by linear least squares approach to extend the output dynamic range. The current mode method is employed for realization of circuits, because of simple circuitry and intuitive topology. Unlike to the some reported circuits which were designed in the subthreshold region, the proposed design operates in the saturation region which provides acceptable bandwidth for the circuit. In order to validate the circuit performance, the post layout simulation results are presented using HSPICE and Cadence with TSMC level 49 (BSIM3v3) parameters for 0.18 μm CMOS technology. The results demonstrate 78 dB output dynamic range with the linearity error less than ±0.5 dB which shows a remarkable improvement in comparison with previously reported works. A bandwidth of 67 MHz, maximum power consumption of 0.326 mW under supply voltage of 1.5 V, and 0.77% error for temperature variations are further achievement of the design.

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