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Your search keyword '"Ramírez-Angulo, Jaime"' showing total 2 results
Start Over Author "Ramírez-Angulo, Jaime" Topic digital electronics
2 results on '"Ramírez-Angulo, Jaime"'

1. Low-Voltage Tunable Pseudo-Differential Transconductor with High Linearity.

Author

Galán, Juan Antonio Gómez, Carrasco, Manuel Pedro, Pennisi, Melita, Martin, Antonio Lopez, Carvajal, Ramon González, and Ramírez-Angulo, Jaime

Subjects
LINEAR statistical models, LOW voltage systems, COMPLEMENTARY metal oxide semiconductors, TRANSISTOR circuits, VOLTAGE-controlled oscillators, ELECTRIC resistors, ELECTRIC circuit analysis, POWER transmission, DIGITAL electronics
Abstract

A novel tunable transconductor is presented. Input transistors operate in the triode region to achieve programmable voltage-to-current conversion. These transistors are kept in the triode region by a novel negative feedback loop which features simplicity, low voltage requirements, and high output resistance. A linearity analysis is carried out which demonstrates how the proposed transconductance tuning scheme leads to high linearity in a wide transconductance range. Measurement results for a 0.5 μm CMOS implementation of the transconductor show a transconductance tuning range of more than a decade (15 μA/V to 165 μA/V) and a total harmonic distortion of -67 dB at 1 MHz for an input of 1 Vpp and a supply voltage of 1.8 V. [ABSTRACT FROM AUTHOR]

Published
2009
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2. New Low-Voltage Fully Programmable CMOS Triangular/Trapezoidal Function Generator Circuit.

Author

Kachare, Meghraj, Ramírez-Angulo, Jaime, Carvajal, Ramón Gonzalez, and López-Martín, Antonio J.

Subjects
*DIGITAL electronics, *ELECTRONIC data processing, *ANALOG electronic systems, *ANALOG-to-digital converters, *SYSTEM analysis, *FUZZY systems
Abstract

A versatile low-voltage CMOS circuit with a triangular/trapezoidal transconductance characteristic and independently programmable slope (keeping constant height or constant width), height (keeping constant slope or constant width), and horizontal position is presented. Simulation results using Cadence DFW-II that verify the functionality of the circuit with ± 1.5-V supplies are presented. A chip prototype has been fabricated in a 0.5-pm technology and experimentally verified. The circuit can find application in the implementation of high resolution, high speed folding analog-to-digital converters, in piecewise-linear approximation, and in the implementation of membership functions in analog and mixed-signal neuro-fuzzy systems. [ABSTRACT FROM AUTHOR]

Published
2005
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