Analysis and design of highly linear triode‐mode based OTA and its application to a wide tunable Gm‐C filter

Rezaei, Farzan; Carvajal, R.G.

doi:10.1002/cta.2372

Cited by 3 publications

(1 citation statement)

References 26 publications

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“…For example, in [11], [21] and [22], ultra-low power Gm-C filter is applied for biomedical signal processing. In [23], [24] and [25], the linearization technique for the transconductor is studied to increase the linear range of Gm-C filter. In [26] and [27], filter topology is analyzed to implement the filter into a linear system.…”

Section: Introductionmentioning

confidence: 99%

Analog Continuous-Time Filter Designing for Morlet Wavelet Transform Using Constrained L2-Norm Approximation

Wang¹,

Meng²,

Wang³

2020

IEEE Access

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In this paper, a novel methodology is proposed to implement the Morlet wavelet transform in an analog circuit. Under the proposed scheme, the impulse response of the linear time-invariant system is used to approximate the Morlet wavelet function. The approximation accuracy is guaranteed by the constrained L 2-norm method, which reduces the approximation error by decreasing free parameters in searching routines. Due to the complex wavelet function, a common-pole strategy is presented for filter construction. With the common poles in real and imaginary parts, partial components can be shared during the analog implementation of the wavelet transform. With the reasonably good approximation for Morlet wavelet function, an analog continuous-time filter is designed based on the Gm-C integrator and orthonormal ladder topology. Application examples are introduced to illustrate the superior performance of the proposed filter. It is shown that the designed analog filter approximates the ideal Morlet wavelet function well in both time and frequency.

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Section: Introductionmentioning

confidence: 99%

Analog Continuous-Time Filter Designing for Morlet Wavelet Transform Using Constrained L2-Norm Approximation

Wang¹,

Meng²,

Wang³

2020

IEEE Access

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A New Tune-Dependent Multiple-Gated Transistor Linearization Technique

Rezaei

2019

J CIRCUIT SYST COMP

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In this paper, a new multiple-gated transistor (MGTR) linearization technique is presented. To simultaneously keep linearity and tuning capability of proposed operational transconductance amplifier (OTA), the auxiliary transistors which are employed for [Formula: see text] cancellation of differential pair (DP) stage are body-driven through a tune-dependent voltage. By this way, the third-order nonlinearity of DP is reduced for a wide range of transconductance values from 5.1 to 35.6[Formula: see text][Formula: see text]A/V. The OTA works with 1.2[Formula: see text]V supply voltage and its power consumption changes between 137.4 and 156[Formula: see text][Formula: see text]W at the entire tuning range. For [Formula: see text][Formula: see text][Formula: see text]A/V ([Formula: see text][Formula: see text]V) and for 0.6[Formula: see text][Formula: see text] input voltage, the simulation results show 6[Formula: see text]dB reduction in the total harmonic distortion (THD) of proposed OTA when the MGTR linearization technique is used and 15[Formula: see text]dB reduction when the tune-dependent body driving is also utilized. The proposed OTA is employed in a third-order low-pass Butterworth filter which is tunable from 2 to 18[Formula: see text]MHz. The in-band IIP3 of filter is 16.9 and 12.4[Formula: see text]dBm, respectively, for 2 and 18[Formula: see text]MHz cutoff frequencies while the two-tone input voltage is applied at 1[Formula: see text]MHz.

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Design of High Gain Folded Cascode OTA-Based Transconductance–Capacitance Loop Filter for PLL Applications

Jana

2021

J CIRCUIT SYST COMP

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This paper deals with the designing of low-power transconductance–capacitance-based loop filter. The folded cascode-based operational transconductance amplifier (OTA) is designed in this paper with the help of quasi-floating bulk MOSFET that achieved the DC gain of 88.61[Formula: see text]dB, unity gain frequency of 97.86[Formula: see text]MHz and power consumption of 430.62[Formula: see text][Formula: see text]W. The proposed OTA is compared with the exiting OTA structure which showed 19.50% increase in DC gain and 15.11% reduction in power consumption. Further, the proposed OTA is used for the designing of transconductance–capacitance-based loop filter that has been operated at [Formula: see text]3[Formula: see text]dB cut-off frequency of 30.12[Formula: see text]MHz with the power consumption of 860.90[Formula: see text][Formula: see text]W at the supply voltage of [Formula: see text][Formula: see text]V. The transistor-level simulation has been done in 0.18[Formula: see text][Formula: see text]m CMOS process.

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Analysis and design of highly linear triode‐mode based OTA and its application to a wide tunable Gm‐C filter

Cited by 3 publications

References 26 publications

Analog Continuous-Time Filter Designing for Morlet Wavelet Transform Using Constrained L2-Norm Approximation

Analog Continuous-Time Filter Designing for Morlet Wavelet Transform Using Constrained L2-Norm Approximation

A New Tune-Dependent Multiple-Gated Transistor Linearization Technique

Design of High Gain Folded Cascode OTA-Based Transconductance–Capacitance Loop Filter for PLL Applications

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