This paper presents the design and the post layout simulation of a high-sensitivity low-power Transimpedance Amplifier (TIA) for frequency domain functional Near Infrared Spectroscopy (FD-fNIRS). It consumes 194 μW from 1.2 V DC supply. This low power will increase the battery life of the NIRS portable system. The proposed TIA achieves 103.3 dBΩ transimpedance gain, 22 MHz bandwidth and 6.3 ... Read more

This paper presents a design and a post layout simulation of a high-sensitivity low-power transimpedance amplifier (TIA) for frequency domain near infrared spectroscopy (FD-NIRS). The TIA consumes 340 μW from a 1.2 V DC supply. This low power is necessary for NIRS device portability. The proposed TIA achieves 104.8 dBΩ transimpedance gain, 50 MHz bandwidth and 15.1 nArms total integrated ... Read more

This paper presents the design and post layout simulation of a high dynamic-rang and low-power transimpedance amplifiers (TIA) for frequency domain near infrared spectroscopy (FD-NIRS). The proposed TIA achieves 108.3 dBΩ gain, 10 MHz bandwidth, and 5.5 nArms integrated input referred noise using a photodiode with 2 pF capacitance. The proposed TIA consumes 260 μW from a 1.2 V supply. ... Read more

This paper presents a post layout simulation results of a 117 dBΩ gain, 20 MHz bandwidth and 7.2 nArms total integrated input referred noise optical receiver for the Near Infrared Spectroscopy (NIRS). The chip is optimized for long battery life time operation with a 2.35 mW total power consumption. An Automatic Gain Control (AGC) is presented to extend the maximum ... Read more

Recently, different medical devices are emerged and widely used such as pulse oximetry, cuffless blood pressure using Photoplethysmogram (PPG), noninvasive blood glucose measuring, and Near Infrared Spectroscopy (NIRS). Those technical devices are very similar in their analog circuit front end architecture which is a transimpedance amplifier (TIA). Many different TIA topologies have appeared in many different optoelectronics field which makes ... Read more

Recently, different medical devices are emerged and widely used such as pulse oximetry, cuffless blood pressure using Photoplethysmogram (PPG), noninvasive blood glucose measuring, and Near Infrared Spectroscopy (NIRS). Those technical devices are very similar in their analog circuit front end architecture which is a transimpedance amplifier (TIA). Many different TIA topologies have appeared in many different optoelectronics field which makes ... Read more