Low-power FinFET-Based Design of a Comparator, Schmitt Trigger, and BASK Modulator
Poola Subbaruyudu, Avireni Srinivasulu, Syed ZahiruddinIntroduction:
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.
Methods:
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).
Results:
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.
Discussion:
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.
Conclusion:
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.