Low-power FinFET-Based Design of a Comparator, Schmitt Trigger, and BASK Modulator

Abstract

This work aims to design and implement FinFET-based comparator, dualoutput Schmitt trigger, and Binary Amplitude Shift Keying (BASK) modulator circuits using a second- generation current-controlled conveyor (CCCII). The primary objective is to achieve multiple analog functionalities with reduced circuit complexity, improved power efficiency, and compact design. The proposed circuits were designed and simulated using Cadence EDA with the GPDK 18 nm FinFET technology. Performance metrics such as power-delay product (PDP) and hysteresis width were evaluated to assess efficiency. The robustness of the BASK modulator was verified through Monte Carlo and worst-case analyses. Additionally, a complete physical layout of the CCCII was developed to ensure manufacturability. Hardware validation is performed using commercially available ICs (AD844AN and LM13700). The simulation results demonstrate significant improvements in PDP and hysteresis characteristics, indicating enhanced efficiency and performance. Monte Carlo and worst-case analyses confirm the robustness and reliability of the BASK modulator under process variations. Experimental results obtained from hardware prototypes closely align with simulation outcomes, validating the proposed designs. The ability to implement comparator, Schmitt trigger, and BASK modulator functionality with a single CCCII and minimal passive components results in a substantial reduction in circuit complexity and power consumption. This compact design approach enhances suitability for modern integrated systems, particularly where area and power efficiency are critical. The proposed CCCII-based architectures offer an efficient, low-power, and compact solution for multiple analog signal processing functions. These designs demonstrate strong potential for applications in biomedical instrumentation, analog signal conditioning, and low-power communication systems.