Design of a microelectronic circuit to amplify and modulate the signal of a micro-electro-mechanical systems arterial pressure sensor

E. Vela-Peóa; I. Quiñones-Urióstegui; F. Martínez-Piñon; J. A. Álvarez-Chávez

doi:10.1117/12.848703

30 March 2010 Design of a microelectronic circuit to amplify and modulate the signal of a micro-electro-mechanical systems arterial pressure sensor

E. Vela-Peóa, I. Quiñones-Urióstegui, F. Martínez-Piñon, J. A. Álvarez-Chávez

Author Affiliations +

Proceedings Volume 7646, Nanosensors, Biosensors, and Info-Tech Sensors and Systems 2010; 76461O (2010) https://doi.org/10.1117/12.848703
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2010, San Diego, California, United States

Abstract

In the article, the design and stimulation is presented of an integrated circuit for the amplification and modulation of an electrical signal proceeding from a Micro-Electro-Mechanical Systems (MEMS) arterial pressure sensor. The signal consists of voltage ranking from 0-10 mV, 1 mA and frequency of 50- 500 Hz. This simple but effective design consists of an operational amplifier (op-amp) configured as a differential amplifier, which amplifies the signal (up to 1V and 10 mA), originating from a Wheatstone bridge in the MEMS sensor, and then this signal is modulated by Pulse width modulation (PWM). The technology employed in this circuit is MOSIS AMIS 1.5 um. The circuit was designed with a two-state op-amp, which is utilized in diverse stages of the system. The use of a differential amplifier, the op-amp, and PWM simplifies the design and renders this compact due to the employment of few components (40 transistors). The use of the PWM facilitates the signaling process at later stages. Results comprise the design of the circuit and the simulation. This consists of a schematic diagram of the layers of all the rules specified in the MOSIS AMIS 1.5 um. Electric and LTSpice software was employed for the design and simulation of the circuit. We present a complete description of the design philosophy, design criteria, figures, and final results.

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E. Vela-Peóa, I. Quiñones-Urióstegui, F. Martínez-Piñon, and J. A. Álvarez-Chávez "Design of a microelectronic circuit to amplify and modulate the signal of a micro-electro-mechanical systems arterial pressure sensor", Proc. SPIE 7646, Nanosensors, Biosensors, and Info-Tech Sensors and Systems 2010, 76461O (30 March 2010); https://doi.org/10.1117/12.848703

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KEYWORDS

Modulation

Amplifiers

Integrated circuit design

Sensors

Device simulation

Microelectromechanical systems

Signal processing

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