Design and Implementation of a High-Q N-Path Filter with Low Power Consumption Using Linearized Gm-C Filter in ۱۸۰-nm Technology for Telecommunication Applications

The ever-growing demand for high-speed and broadband access in modern telecommunication services has significantly emphasized the necessity for compact, efficient, and reconfigurable radio architectures. Among these, integrated Software Defined Radio (SDR) systems have gained increasing attention due to their flexibility and adaptability across multiple standards and frequency bands. A critical building block within SDR systems is the high-quality factor (high-Q) analog filter that supports both on-chip integration and dynamic configurability. In this work, we propose a novel design methodology that employs an optimized biasing strategy combined with a bulk-controlled differential transconductance stage to realize a linearized transconductance amplifier capable of processing a wide input voltage range with improved linearity. Leveraging this amplifier, a configurable transconductance-capacitor (Gm-C) filter is developed and integrated within a ۴-path band-pass filter architecture designed for high-Q performance. The proposed design achieves several key improvements: it significantly reduces overall power consumption, extends the allowable input signal range, enhances dynamic range, and lowers the total harmonic distortion (THD) of the final filter output. Furthermore, critical filter parameters including gain, center frequency, and quality factor can be widely tuned through simple adjustments of the transconductance, making the system highly flexible and adaptive to varying telecommunication requirements. All simulations and design validations have been performed using a ۰.۹V power supply in standard ۱۸۰-nm CMOS technology, demonstrating the suitability of the proposed filter structure for low-power, high-precision, and fully integrated telecommunication applications.

کلیدواژه ها:

N-Path Band-pass Filter ، Transconductance-Capacitor (Gm-C) Filter ، ۱۸۰-nm CMOS Technology ، Quality Factor ، Power Consumption