A Nonlinearity-Compensated All-MOS Voltage-to-Current Converter

Wan, Meilin; Liao, Wang; Dai, Kui; Zou, Xuecheng

doi:10.1109/tcsii.2015.2468912

Cited by 6 publications

(4 citation statements)

References 15 publications

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“…A variation of a linear voltage to current converter [28] shown in Figure 5 was used to implement the current mirror of Figure 2. Therefore, I out is now…”

Section: Proposed Circuitmentioning

confidence: 99%

A Highly Robust Interface Circuit for Resistive Sensors

et al. 2019

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The signal from a resistive sensor must be converted into a digital signal to be compatible with a computer through an interface circuit. Resistance-to-Period converter, used as interface, is preferred if the resistance variations are very large. This paper presents the structure of an interface circuit for resistive sensors that is highly robust to component and power supply variations. Robustness is achieved by using the ratiometric approach, thus complex circuits or highly accurate voltage references are not necessary. To validate the proposed approach, a prototype was implemented using discrete components. Measurements were carried out considering a variation of ±35% in the single supply voltage and a range from 1 k Ω to 1 M Ω .

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“…A variation of a linear voltage to current converter [28] shown in Figure 5 was used to implement the current mirror of Figure 2. Therefore, I out is now…”

Section: Proposed Circuitmentioning

confidence: 99%

A Highly Robust Interface Circuit for Resistive Sensors

et al. 2019

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“…The adaptive biasing of differential pair [14,15], using linear operation of triode-mode transistors [16,17], derivative superposition which is also called multiple-gated transistor [18][19][20][21][22][23][24] and resistive source degeneration [25,26] are among the main linearisation techniques. In addition to high linearity, the OTA in Gm-C filters should be also widely tunable.…”

Section: Introductionmentioning

confidence: 99%

“…However, the open loop operation of operational transconductance amplifiers (OTA) leads to more non‐linearity of Gm‐C filters [11–14]. The solution that has been presented in many literatures [1–29] is to design highly linear OTA.…”

Section: Introductionmentioning

confidence: 99%

Adaptive cancellation linearisation and its application to wide‐tunable Gm‐C filter design

Rezaei

2017

IET Circuits, Devices & Systems

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This paper presents an adaptive g m3 cancellation for linearisation of operational transconductance amplifier (OTA) and its application to design of a wide tunable Gm-C filter. g m3 cancellation through paralleling triode-and subthreshold-mode transconductors makes good linearisation, but only in a limited range of tuning voltage. An auxiliary circuit is employed to adaptively change the operating point of subthreshold-mode transconductor such that to keep linearisation throughout the tuning range. By this way, the linearity of OTA is significantly improved in overall transconductance tuning range from 18 to 289 μA/V. While by applying 0.6 Vpp input voltage at 1 MHz the total harmonic distortion (THD) of conventional OTA lies between −75.1 and −44.4 dB, it reduces to lie between −83.3 and −57.4 dB in the proposed OTA. Using the proposed OTA, a third-order low-pass Gm-C filter is designed in 0.18 μm CMOS technology. The cutoff frequency of filter is tunable from 1.73 to 27.25 MHz, thus, can be applicable to support WCDMA, WLAN (IEEE 802.11a/b/g/n) and WiMAX standards in multi-mode direct conversion receivers. The third-order intercept point of filter is between 7.1 and 13.7 dBm in different tuning conditions.

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“…Introduction: Voltage-to-current (V-I) converter is a fundamental cell widely utilized in analog and mixed-signal systems which realizes functions such as voltage sensing, overvoltage detection, voltage metering, or data conversion [1][2][3][4][5].…”

mentioning

confidence: 99%

A self‐contained self‐protected ±70 V voltage‐to‐current converter with ±0.2% non‐linearity

Xiao

Zhai

Yang

et al. 2022

Electronics Letters

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This paper presents a self‐protected wide‐range bi‐directional voltage‐to‐current (V–I) converter. The proposed V–I converter is a self‐contained cell that operates independently and implements high precision conversion with a transconductance set by resistors. Compared with conventional structures, the proposed scheme features safety and reliability. The conversion range is widened since the internal biasing current is not starved and is adaptively set based on the input voltage. The proposed V–I structure was fabricated in a 0.18‐µm Bipolar‐CMOS‐DMOS (BCD) process with a die area of 0.0825 mm2. The measured non‐linearity across an input voltage range from −70 to 70 V was within ±0.2%. The total harmonic distortion was −63 dB at 1 kHz and the delay of conversion was within 3 µs.

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A Nonlinearity-Compensated All-MOS Voltage-to-Current Converter

Cited by 6 publications

References 15 publications

A Highly Robust Interface Circuit for Resistive Sensors

A Highly Robust Interface Circuit for Resistive Sensors

Adaptive cancellation linearisation and its application to wide‐tunable Gm‐C filter design

A self‐contained self‐protected ±70 V voltage‐to‐current converter with ±0.2% non‐linearity

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