A 760&amp;#x03BC;W 4&lt;sup&gt;th&lt;/sup&gt; order butterworth FGMOS Gm-C filter with enhanced linearity

Algueta-Miguel, José M.; Blas, Carlos A. De La Cruz; Lopez-Martin, A.J.

doi:10.1109/iscas.2015.7168624

Cited by 6 publications

(3 citation statements)

References 20 publications

(16 reference statements)

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“…Gm‐C filters offer a higher‐frequency operation at lower power consumption. On the other hand, they suffer from low linearity due to the open loop architecture [3]. Recently, filters based on the source follower architecture were proposed to overcome the limitations of conventional topologies that are based on operational amplifiers.…”

Section: Introductionmentioning

confidence: 99%

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Fully‐differential second‐order tunable bandstop filter based on source follower

Almutairi¹,

Karsilayan²

2019

Electron. lett.

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A new design method for a second-order bandstop filter is presented. The proposed filter is based on the source follower configuration with a partial positive feedback. The positive feedback is used to increase the quality factor of the filter, and the feed-forward paths are used to create complex zeros. The proposed bandstop filter has electronically tunable centre frequency, bandwidth and attenuation with low power consumption. The proposed design has been simulated in TSMC 180 nm CMOS technology. The filter achieves 5.8 nV/ Hz √ input-referred noise density. For a 2 GHz input signal, the filter achieves a signal-to-noise ratio of 60 dB for 238 mV 0−P, diff input signal amplitude. The simulated results show that the centre frequency tuning range is between 1.6 and 3 GHz and the bandwidth is tunable from 0.6 to 1 GHz. The filter consumes about 2.5 mW for a supply voltage of 1.8 V at a centre frequency of 2.3 GHz. Introduction: Continuous-time filters play an important role in communication systems such as wideband receivers. Bandstop filters are usually required to suppress blockers or interferences [1], which can be implemented using different architectures, such as active RC, Gm-C, or passive LC. Each topology is different in terms of linearity, area and power consumption. An active RC filter has excellent linearity due to the close-loop architecture, but it is not suitable for highfrequency applications due to the limitation of the bandwidth (BW) of the operational amplifiers [2]. Furthermore, the centre frequency of the active RC filter must be lower than the gain BW product of the amplifier, which will consume more power at high frequencies. Gm-C filters offer a higher-frequency operation at lower power consumption. On the other hand, they suffer from low linearity due to the open loop architecture [3]. Recently, filters based on the source follower architecture were proposed to overcome the limitations of conventional topologies that are based on operational amplifiers. This topology is suitable for high-frequency applications with low power consumption, low noise, and high linearity [4-6]. The proposed topology introduces a new bandstop filter, which is based on super source follower [6], positive feedback and feed-forward paths. The parameters of the proposed filter, such as BW, attenuation, and centre frequency are electronically tunable by the bias currents and varactors of the circuit.

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Section: Introductionmentioning

confidence: 99%

“…Positive feedback, realised by cross-coupled Fig. 1, is used to increase the quality factor by controlling g m2 in (3).…”

mentioning

confidence: 99%

Fully‐differential second‐order tunable bandstop filter based on source follower

Almutairi¹,

Karsilayan²

2019

Electron. lett.

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“…In portable devices in the field of biomedical, it is very crucial to have longer battery life because it needs to be implanted within the patients for a long term, and such requirement can be achieved with low power consumption. To achieve low voltage and low power circuit design, a distinct number of techniques have been approached by researchers, such as bulk-driven, self-cascode, current mirror, and floating gate MOSFET (FGMOS) techniques [1]- [14]. Moreover by scaling down the feature size of the device, the reduction of operating supply voltage is obvious whereas the speed of the device might be outflowed.…”

Section: Introductionmentioning

confidence: 99%

Implementation of floating gate MOSFET in inverter for threshold voltage tunability

et al. 2017

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Abstract. This paper presents the ability of floating gate MOSFET (FGMOS) threshold voltage to be programmed or tuned which is exploited to improve the performance of electronic circuit design. This special characteristic owns by FGMOS is definitely contributes towards low voltage and low power circuit design. The comparison of threshold voltage between FGMOS and conventional NMOS is done in order to prove that FGMOS is able to produce a lower threshold voltage compared to conventional NMOS. In addition, in this paper, an implementation of FGMOS into inverter circuit is also done to show the programmability of FGMOS threshold voltage. The operations of the inverter circuits are verified using Sypnopsys simulation in 0.1µm CMOS technology with supply voltage of 1.8V.

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Optimal Design of a Bandstop Filter Through Advanced Compact Model and Lagrange Method

Almutairi,

Almutairi

2023

2023 International Conference on Electrical, Communication and Computer Engineering (ICECCE)

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A 760μW 4<sup>th</sup> order butterworth FGMOS Gm-C filter with enhanced linearity

Cited by 6 publications

References 20 publications

Fully‐differential second‐order tunable bandstop filter based on source follower

Fully‐differential second‐order tunable bandstop filter based on source follower

Implementation of floating gate MOSFET in inverter for threshold voltage tunability

Optimal Design of a Bandstop Filter Through Advanced Compact Model and Lagrange Method

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