Journal ArticleDOI
A large-signal very low-distortion transconductor for high-frequency continuous-time filters
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TLDR
In this article, a high-frequency large-signal very low-distortion voltage-to-current transducer is presented, where the transconductor noise is integrated over a bandwidth of 1 MHz.Abstract:
A high-frequency large-signal very low-distortion voltage-to-current transducer is presented. The total harmonic distortion (THD), for supply voltages of only +or-2.5 V, is smaller than 0.1% for fully differential input signals up to 2.4 V peak to peak (V/sub pp/). The dynamic range is on the order of 89 dB with the transconductor noise integrated over a bandwidth of 1 MHz. Moreover, this structure presents low sensitivity to transistor mismatches. An operational transconductance amplifier (OTA), based on this transconductor, has been used in an adjustable quality factor 1.8-MHz biquadratic continuous-time filter. The quality factor Q is controlled, from 2 to 50, with a novel current-source configuration. Both the OTA and the filter have been fabricated in a CMOS 3- mu m n-well process. >read more
Citations
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Journal ArticleDOI
CMOS transconductance amplifiers, architectures and active filters: a tutorial
TL;DR: In this article, an updated version of a 1985 tutorial paper on active filters using operational transconductance amplifiers (OTAs) is presented, and the integrated circuit issues involved in active filters (using CMOS transconductances amplifiers) and the progress in this field in the last 15 years is addressed.
Journal ArticleDOI
A 60-dB dynamic-range CMOS sixth-order 2.4-Hz low-pass filter for medical applications
TL;DR: In this article, a complementary metal-oxide-semiconductor (CMOS) sixth-order 2.4 Hz low-pass fitter for medical applications is presented, which has shown a dynamic range (DR) of 60 dB, while the harmonic distortion components are below -50 dB.
Journal ArticleDOI
A 10.7-MHz 68-dB SNR CMOS continuous-time filter with on-chip automatic tuning
TL;DR: In this paper, a maximally flat 10.7-MHz fourth-order bandpass filter with an on-chip automatic tuning system is presented, and the power consumption of the system is 220 mW.
Journal ArticleDOI
Systematic Design and Modeling of a OTA-C Filter for Portable ECG Detection
Shuenn-Yuh Lee,Chih-Jen Cheng +1 more
TL;DR: The OTA-C filter can be adopted to eliminate the out-of-band interference of the electrocardiogram (ECG) whose signal bandwidth is located within 250 Hz.
Journal ArticleDOI
A CMOS continuous-time G/sub m/-C filter for PRML read channel applications at 150 Mb/s and beyond
I. Mehr,D.R. Welland +1 more
TL;DR: In this article, a programmable seven-pole two-asymmetric zero filter implementation is described based on a new transconductance (G/sub m/) cell, and the impact of integrator finite output impedance, excess phase, and other implementation related nonidealities is discussed.
References
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Book
Operation and modeling of the MOS transistor
TL;DR: In this article, the MOS transistors with ION-IMPLANTED CHANNELS were used for CIRCUIT SIMULATION in a two-and three-tier MOS structure.
Journal ArticleDOI
A 4-MHz CMOS continuous-time filter with on-chip automatic tuning
Francois Krummenacher,N. Joehl +1 more
TL;DR: This paper presents a 3rd order low-pass continuous-time filter with 4 MHz cut-off frequency, integrated in a 3 μm CMOS process, based on the direct simulation of a doubly-terminated LC ladder using capacitors and fully-balanced, current-controlled transconductance amplifiers with extended linear range.
Journal ArticleDOI
Active filter design using operational transconductance amplifiers: A tutorial
TL;DR: In this paper, the operational transconductance amplifier (OTA) is used in voltage-controlled amplifiers, filters, and impedances for continuous-time monolithic filters, where the total number of components used in these circuits is small, and the design equations and voltage-control characteristics are attractive.
Proceedings Article
A 4-MHz CMOS Continuous-Time Filter with On-Chip Automatic Tuning
Francois Krummenacher,N. Joehl +1 more
TL;DR: In this article, a 3rd order low-pass continuous-time filter with 4 MHz cut-off frequency, integrated in a 3?m CMOS process, is presented, based on direct simulation of a doublyterminated LC ladder using capacitors and fully-balanced, current-controlled transconductance amplifiers with extended linear range.
Journal ArticleDOI
High-frequency CMOS continuous-time filters
H. Khorramabadi,Paul R. Gray +1 more
TL;DR: Fully integrated, high-frequency continuous-time filters can be realized in MOS technology using a frequency-locking approach to stabilize the time constants using a phase-locked loop.
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A 4-MHz CMOS continuous-time filter with on-chip automatic tuning
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