A Transconductor and Tunable &lt;inline-formula&gt; &lt;tex-math notation="LaTeX"&gt;$G_{m}-C$&lt;/tex-math&gt;&lt;/inline-formula&gt; High-Pass Filter Linearization Technique Using Feedforward &lt;inline-formula&gt; &lt;tex-math notation="LaTeX"&gt;$G_{m3}$&lt;/tex-math&gt;&lt;/inline-formula&gt; Canceling

Kim, Duksoo; Kim, Byung-Joon; Nam, Sangwook

doi:10.1109/tcsii.2015.2456611

Cited by 14 publications

(3 citation statements)

References 8 publications

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“…Bulk driven MOS transistors were used in [25] to control the cancellation factor, and the transconductance was linearly adjusted by bulk voltage. A feed-forward technique was used in [26] to cancel out the third order nonlinear component of OTA, but its improved performance was achieved at the expense of high noise and increased power. Source degeneration, nonlinear term cancellation and current division technique was used in [27] to improve the linear range up to +/− 0.4 V under a supply voltage of 1 V. The linearity of OTA is an important issue because the overall system performance is determined by the linearity of OTA.…”

Section: Introductionmentioning

confidence: 99%

Power Efficient Fully Differential Bulk Driven OTA for Portable Biomedical Application

2018

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This paper presents a power efficient, bulk driven, source degenerated fully differential operational transconductance amplifier (OTA), operating in the subthreshold region. The input part of the OTA consists of a bulk driven source degenerated differential pair and cross coupled transistors to improve the linearity of OTA. It consists of a bulk driven pair to reduce the supply voltage and to improve the linearity. The proposed fully differential OTA has utilized self-cascode current mirror loads which increases the output impedance and hence the overall intrinsic gain. A subthreshold region is adopted to reduce the power consumption of the circuit. For a 200 mVpp sinusoidal input at 100 Hz, a total harmonic distortion (THD) of −58.56 dB is achieved. The gain, gain bandwidth (GBW), phase margin (PM) and gain margin (GM) values obtained were 48.4 dB, 3.1 KHz, 80 • and 19.01 dB, respectively. The common mode rejection ratio (CMRR), power supply rejection ratio (PSRR) and slew rate +/− values were 146.3 dB, 83 dB and 99.56/100 V/ms, respectively. The circuit is capable of operating under a supply voltage of 0.8 V with a power consumption of 59.04 nW, which proves that the circuit is suitable for portable biomedical devices. The proposed circuit is simulated in CADENCE environment virtuoso using LFoundry 150 nm Complementary metal oxide semiconductor (CMOS) process technology.

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Section: Introductionmentioning

confidence: 99%

Power Efficient Fully Differential Bulk Driven OTA for Portable Biomedical Application

2018

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“…The amount of third-order intermodulation distortion (IMD3) components can be represented as an input-referred third-order intercept point (IIP3) value. To suppress the IMD3 and achieve high linearity performance, a linearization technique for a transconductor circuit is introduced [4]. This technique uses two-path feed-forward architecture, and the out-of-phase IMD3 components are added to cancel each other.…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, the wideband receiver front-end is designed using the linearization technique described in [4]. The noise-cancelling receiver architecture, including the linearized LNTA, is explained in Sect.…”

Section: Introductionmentioning

confidence: 99%

A Wideband Noise-Cancelling Receiver Front-End Using a Linearized Transconductor

Kim

Nam

2017

IEICE Trans. Electron.

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A wideband noise-cancelling receiver front-end is proposed in this brief. As a basic architecture, a low-noise transconductance amplifier, a passive mixer, and a transimpedance amplifier are employed to compose the wideband receiver. To achieve wideband input matching for the transconductor, a global feedback method is adopted. Since the wideband receiver has to minimize linearity degradation if a large blocker signal exists out-of-band, a linearization technique is applied for the transconductor circuit. The linearization cancels third-order intermodulation distortion components and increases linearity; however, the additional circuits used in linearization generate excessive noise. A noise-cancelling architecture that employs an auxiliary path cancels noise signals generated in the main path. The designed receiver front-end is fabricated using a 65-nm CMOS process. The receiver operates in the frequency range of 25 MHz-2 GHz with a gain of 49.7 dB. The in-band input-referred third-order intercept point is improved by 12.3 dB when the linearization is activated, demonstrating the effectiveness of the linearization technique.

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Drain Charge Technique in TFET for Analog Transconductor Application

Lenus

Haris

Rani

2022

Silicon

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A Transconductor and Tunable <inline-formula> <tex-math notation="LaTeX">$G_{m}-C$</tex-math></inline-formula> High-Pass Filter Linearization Technique Using Feedforward <inline-formula> <tex-math notation="LaTeX">$G_{m3}$</tex-math></inline-formula> Canceling

Cited by 14 publications

References 8 publications

Power Efficient Fully Differential Bulk Driven OTA for Portable Biomedical Application

Power Efficient Fully Differential Bulk Driven OTA for Portable Biomedical Application

A Wideband Noise-Cancelling Receiver Front-End Using a Linearized Transconductor

Drain Charge Technique in TFET for Analog Transconductor Application

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