A Review of Transimpedance Amplifiers Used in Biomedical Applications

Biomedical application involves use of technology in the design and employment of medical equipment for the living beings. This hybrid combination brings medicine and engineering together for advance health care treatments of patients by utilizing the designing skills of engineers. Thereby, it includes diagnostic medical devices and clinical implants like bone plates, pulse oximeters, EEG,ECG etc. with imaging and Optical Fiber Sensing (OFS) devices. The power content of these detected light signals are weak in nature, therefore need of amplifiers like Trans-impedance Amplifiers (TIA)which offers high gain with minimum noise for improving the Signal to Noise Ratio (SNR) comes. Different TIA topologies have been analyzed and presented by giving their comparison for different parameters to make it easy for choosing for the appropriate one based on a particular application as per user's requirement. The present work is basically giving an insight into the technology development and likely future scope of advancement.