Skip to main content

A High CMRR, Low Power Current-Mode Instrumentation Amplifier for Biomedical Applications

Buy Article:

$113.00 plus tax (Refund Policy)

Abstract:

With the advancement of science and technology to change with each passing day in last few years, medical treatment instruments are demanding to develop. Due to CMOS technology, the expensive and large medical instruments will be greatly reduced in both cost and volume. Moreover, the portability and easy-to-use become possible. Recording biomedical signals is one of the challenges in a biomedical electronics detection system, because biomedical signals have very weak amplitude and low frequency, usually of few milli-volts or less and the frequency below 1 KHz. Biomedical signals, such as EEG/ECG signals, are characterized by their low voltage-levels and very low frequencies. Thus, an instrumentation amplifier (IA) must exhibit very low input-referred noise. The used IA must have high input impedance, low output impedance, limited bandwidth and low power consumption. In this paper, we propose a current-mode instrumentation amplifier composed of current conveyors. The features of our current-mode instrumentation amplifier include low power dissipation, low noise, and high CMRR performance suitable for biomedical applications. The low noise combined with high CMRR could effectively suppress noise effects, amplify the physical signals, as well as reflect the real physical status. Circuit simulation results of our study achieved CMRR of 196 dB and low power of 44.98 uW.

Keywords: BIOMEDICAL APPLICATIONS; CURRENT MODE; INSTRUMENTATION AMPLIFIER; LOW POWER

Document Type: Research Article

DOI: https://doi.org/10.1166/sl.2012.2281

Publication date: 2012-05-01

More about this publication?
  • The growing interest and activity in the field of sensor technologies requires a forum for rapid dissemination of important results: Sensor Letters is that forum. Sensor Letters offers scientists, engineers and medical experts timely, peer-reviewed research on sensor science and technology of the highest quality. Sensor Letters publish original rapid communications, full papers and timely state-of-the-art reviews encompassing the fundamental and applied research on sensor science and technology in all fields of science, engineering, and medicine. Highest priority will be given to short communications reporting important new scientific and technological findings.
  • Editorial Board
  • Information for Authors
  • Subscribe to this Title
  • Terms & Conditions
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more