Proceedings ArticleDOI
Low distortion active filters using the G m -assisted OTA-RC technique
Siva V. Thyagarajan,Shanthi Pavan,Prabu Sankar +2 more
- pp 162-165
TLDR
The Gm-assisted OTA-RC technique is proposed, which is a way of combining GM-C and active-RC integrators in a manner that enhances the linearity and speed of the latter, while adding negligible extra noise or power dissipation.Abstract:
The linearity of conventional active-RC filters is limited by the operational transconductance amplifiers (OTAs) used in the integrators. We propose the Gm-assisted OTA-RC technique, which is a way of combining Gm-C and active-RC integrators in a manner that enhances the linearity and speed of the latter, while adding negligible extra noise or power dissipation. Measurements from a fifth order Chebyshev filter with 20 MHz bandwidth designed in a 0.18µm CMOS process show a 30 dB reduction in intermodulation distortion when Gm-assistance is added to an active-RC filter.read more
Citations
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Journal ArticleDOI
Active-RC Filters Using the Gm-Assisted OTA-RC Technique
TL;DR: The Gm-assisted OTA-RC technique is explored, which is a way of combining GM-C and active-RC integrators in a manner that enhances the linearity and speed of the latter, while adding negligible extra noise or power dissipation.
Proceedings ArticleDOI
A 1.56mW 50MHz 3rd-order filter with current-mode active-RC biquad and 33dBm IIP3 in 65nm CMOS
TL;DR: In this paper, a novel inverter-based-integrator filter design is proposed that relaxes the UGB requirement of the OTAs by decoupling the integration capacitance from the feedback loop.
Proceedings Article
Accurate characterization of integrated continuous-time filters
Shanthi Pavan,Tonse Laxminidhi +1 more
TL;DR: When compared to conventional frequency response measurement methods, the proposed techniques show a significantly enhanced measurement accuracy in the stopband, while being less sensitive to package characteristics.
Journal ArticleDOI
An 114 Hz–12 MHz digitally controlled low-pass filter for biomedical and wireless applications
TL;DR: This study presents a wide tunable Gm-C low-pass filter for biomedical and wireless applications designed using the standard 90 nm complementary metal–oxide–semiconductor technology operating with a balanced supply voltage of 1.2 V.
Journal ArticleDOI
A New Linearized CCII-Based Fully Differential CMOS Transconductor Used for $$\hbox {G}_\mathrm{m}$$Gm-C Active Filters Implementation
TL;DR: The paper presents a new linearized, of high performance, fully differential transconductor, based on class AB second generation current conveyor (CCII) in CMOS technology, which allows to obtain a higher transconductance value, an improved linearity and operates at high frequency for a 3.3 V supply voltage.
References
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TL;DR: Analytical modeling of communication receivers to account for their nonlinear response to multiple input signals is discussed, based on the application of the Wiener-Volterra analysis of nonlinear functionals.
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Journal ArticleDOI
A 4.1-mW 10-MHz Fourth-Order Source-Follower-Based Continuous-Time Filter With 79-dB DR
TL;DR: Due to the intrinsic feedback present in any source-follower, the proposed cell performs larger linearity for smaller Vov(=VGS-VTH).
Journal ArticleDOI
A Low-Power Wideband Reconfigurable Integrated Active-RC Filter With 73 dB SFDR
TL;DR: A low-power, highly linear, integrated, active-RC filter exhibiting a reconfigurable transfer function (Chebyshev, Elliptic) and bandwidth and a digital automatic tuning scheme to account for process and temperature variations is presented.