Linearity improvement of source degenerated transconductance amplifiers

Kar, Sanjeeb Kumar; Sen, Siddhartha

doi:10.1007/s10470-012-9948-y

Cited by 21 publications

(5 citation statements)

References 17 publications

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“…CM is the DC input common-mode voltage and v dm the input differential-mode voltage. When all transistors are biased in the weak inversion region, the output differential current is given by (2), in which n p is the slope factor in weak inversion and V t is the thermal voltage.…”

Section: Thd Enhanced In a Symmetrical Differential Pair Of Otamentioning

confidence: 99%

“…In the case of gate-driven, the input is connected to gate; and in the bulk-driven, the input is connected to substrate implying the implementation of an individual n-well in the input transistors. The active area occupied by the OTA, including the guard-ring of circuit, is 0.013 mm 2 . Table 6 shows the comparison with other recent works that implements OTA for open-loop applications.…”

Section: Post-layout Simulationsmentioning

confidence: 99%

“…OTA is an important building block for analogue circuits [1][2][3][4] and widely used in low power applications such as biomedical signal processing [5,6]. OTA for biomedical analogue front-end determines the performance of the circuit, such as power consumption, supply voltage, noise, and linearity [1,[6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

“…Several techniques about increasing the linear range [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20] have been proposed in the literature, based on source generation, adaptive biasing, pseudo-differential stages, cross-coupling, multiple differential pairs, current cancellation, and the combination of some of them. Other technique is the use of bulkdriven differential pair to enhance the linear range of OTA [3,4,[11][12][13].…”

Section: Introductionmentioning

confidence: 99%

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Biasing technique to improve total harmonic distortion in an ultra‐low‐power operational transconductance amplifier

Sánchez

Moreno

Ferreira

et al. 2019

IET Circuits, Devices & Systems

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This study presents a new technique based on large signal analysis, to enhance the total harmonic-distortion (THD) in an ultra-low-power operational transconductance amplifier (OTA). The proposed technique is used to implement an ultra-lowpower gate-driven and bulk-driven OTA with high linear range. Mismatch and post-layout simulations in 0.13 μm CMOS technology demonstrate that the proposed technique can improve the THD and the dynamic range, without affecting the transconductance tuning and the common-mode control. It achieves a 183 and 640 mVpp linear ranges for gate-driven and bulk-driven OTA, and a 61.8 dB dynamic range at 0.5 V with 26.35 nW power dissipation.

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Section: Thd Enhanced In a Symmetrical Differential Pair Of Otamentioning

confidence: 99%

Section: Post-layout Simulationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Biasing technique to improve total harmonic distortion in an ultra‐low‐power operational transconductance amplifier

Sánchez

Moreno

Ferreira

et al. 2019

IET Circuits, Devices & Systems

View full text Add to dashboard Cite

show abstract

“…OTA is a differential transconductance amplifier whose desired characteristics are high linearity, bandwidth, input/output resistances and slew rate [6]. Many architectures of OTA have been proposed in literature [7][8][9]. In all these architectures, biasing current limits the output current and hence, circuit performance.…”

Section: Introductionmentioning

confidence: 99%

DTMOS based low voltage high performance FVF-OTA and its application in MISO filter

Narang

Aggarwal

Gupta

2016

2016 International Conference on Advances in Computing, Communications and Informatics (ICACCI)

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This paper presents a high performance Dynamic Threshold MOSFET (DTMOS) based low voltage Flip Voltage Follower-Operational Transconductance Amplifier (FVF-OTA). The proposed DTMOS based FVF-OTA combines the low voltage and high transconductance properties of DTMOS with high input impedance and wide output current range characteristics of FVF-OTA. Furthermore, high linearity along with high bandwidth is achieved through DTMOS technique. To show enhancement in the transconductance of the proposed circuit, small signal analysis is carried out. Moreover, Multi Input Single Output (MISO) filter is realized using the proposed DTMOS based FVF-OTA. Simulations of proposed OTA and its MISO filter application are done in Eldospice (Mentor Graphics) in TSMC 0.18 m technology. In the proposed circuit, a transconductance of 314.73 S is achieved at an operating voltage of ± 0.5V and power dissipation of 70.19 W. Moreover, MISO filter realized using the proposed OTA attains a bandwidth of 43.91MHz. To validate the robustness of proposed circuit against variations in temperature and aspect ratios of MOSFETs, temperature and Monte Carlo analysis have been done. Keywords-Dynamic Threshold MOSFET (DTMOS); Flip Voltage Follower (FVF); Operational transconductance amplifier (OTA); Multi Input Single Output (MISO); Monte Carlo analysis.

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Design of Low Power Two-Stage OTA Based Second-Order Gm-C Filter for Fast Locking PLL Based Frequency Synthesizer

Jana

Govil

2022

Lecture Notes in Electrical Engineering

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Linearity improvement of source degenerated transconductance amplifiers

Cited by 21 publications

References 17 publications

Biasing technique to improve total harmonic distortion in an ultra‐low‐power operational transconductance amplifier

Biasing technique to improve total harmonic distortion in an ultra‐low‐power operational transconductance amplifier

DTMOS based low voltage high performance FVF-OTA and its application in MISO filter

Design of Low Power Two-Stage OTA Based Second-Order Gm-C Filter for Fast Locking PLL Based Frequency Synthesizer

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