Enhancing Mobility for the Visually Impaired using CMOS Implementation of Multipath Fully Differential OTA with Two Flipped Voltage Follower at 65 and 45nm CMOS Technology

The article presents the CMOS implementation of multipath differential OTA (operational trans conductance amplifier) with two flipped voltage follower. OTA is a type of analog amplifier used in integrated circuits for signal processing applications and used to convert input voltage signal into an output current signal. The design aims to enhance performance metrics such as gain, bandwidth and addressing the demands for modern analog and mixed signal applications. Utilizing two Flipped’ Voltages Followers [FVF’s] cell as variable current’s source will enables both class A-B operation and adaptive in biased for all other type of driver units. The structures incorporates multiple input-to-output paths serving as dynamic current’s boosters in the time of their slewing rates phases, enhancing their slewing rate performances. The amplifier performance is analyzed in terms of gain and bandwidth. Their proposed method of two stage flipped voltage follower with multipath fully differential OTA was developed at 50nm using 1.4V and 75 nm using 1.6V CMOS technology and finally this work was developed in Tanner EDA tool. This paper explores advancements in assistive technology aimed at enhancing mobility for individuals with visual impairments. The proposed solution involves the CMOS implementing of the multiple path full difference type of Operational Transconductance Amplifier (OTA), incorporating 2 Flip type of Voltage level Followers (FVF) cell. The study investigates the effectiveness of this design in both 75nm and 50nm CMOS technologies. The results showcase improvements in transconductance and operational characteristics, offering a promising avenue for the development of assistive devices. The findings contribute to the ongoing efforts to create inclusive and accessible technological solutions for individuals facing challenges in visual navigation.