Journal ArticleDOI
A class-AB linear transconductor with enhanced linearity
Cristian Bocciarelli,Francesco Centurelli,Pietro Monsurro,Valerio Spinogatti,Alessandro Trifiletti +4 more
TLDR
In this paper, a linear transconductor topology is proposed, where class-AB behavior based on adaptive biasing is exploited to improve the linear range of the transceiver.Abstract:
In this paper a novel linear transconductor topology is proposed, where class-AB behavior based on adaptive biasing is exploited to improve the linear range. The adaptive biasing circuit is based on the Winner-Take-All topology already used for class-AB OTAs, and optimized to improve the linearity, and the proposed transconductor features a gain control input for tunability. The transconductor provides a gain of 43 μS while consuming 70 μW. The linear range (1% variation of the dc transconductance gain) is 470 mVpp, about 4.5 times larger than for the corresponding class-A cell. Total harmonic distortion is improved by about 15 dB, and good results in terms of linearity and noise are reported with respect to the state-of-the-art. Simulations of a Gm-C biquad filter based on the proposed transconductor are also reported to validate the design.read more
Citations
More filters
Journal ArticleDOI
Ladder-Type <i>G<sub>m</sub>-C</i> Filters with Improved Linearity
TL;DR: In this paper , the transconductor-capacitor is rewired such that their input differential voltage lies within the linear regime. And the proposed filter implementation occupies 0.0164 mm and consumes 167μW for the cutoff frequency of 1-MHz.
References
More filters
Journal ArticleDOI
The flipped voltage follower: a useful cell for low-voltage low-power circuit design
Ramon G. Carvajal,Jaime Ramirez-Angulo,Antonio J. Lopez-Martin,Antonio Torralba,Juan Antonio Gómez Galán,Alfonso Carlosena,Fernando Muñoz Chavero +6 more
TL;DR: A design example showing the application of the FVF to build systems based on translinear loops is described which shows the potential of this cell for the design of high-performance low-power/low-voltage analog and mixed-signal circuits.
Journal ArticleDOI
Design of linear CMOS transconductance elements
A. Nedungadi,T. Viswanathan +1 more
TL;DR: In this paper, some novel circuit techniques for realizing linear CMOS tranconductance elements are proposed, which have superior linearity and input voltage range compared with the conventional source-coupled differential pair.
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
The multi-tanh principle: a tutorial overview
TL;DR: This paper reviews a class of linear transconductance cells, having proven value in a variety of communications applications, characterized by the use of parallel- or series-connected sets of differential pairs of bipolar transistors whose inputs and outputs are connected in parallel.
Journal ArticleDOI
A linear MOS transconductor using source degeneration and adaptive biasing
Ko-chi Kuo,A. Leuciuc +1 more
TL;DR: In this article, a new configuration for linear MOS voltage-to-current conversion (transconductance) was proposed, which combines two previously reported linearization methods, achieving 60-dB linearity for a fully balanced input dynamic range up to 1 V/sub pp/ at a 3.3-V supply voltage, with slightly decreasing performance in the unbalanced case.