Ultra-low power comb filter

Design method for VDCC-based analog comb filter for power line interference cancellation

“…Analog filters hold a distinct advantage for real-time signal processing compared to digital counterparts. Consequently, numerous analog comb filters have been listed in existing literature [3] , [4] , [5] , [6] , [7] , [8] , [9] to eliminate the primary frequency of PLI and its associated odd harmonics from biological signals like electrocardiogram (ECG), electroencephalogram (EEG), and electromyogram (EMG).…”

“…The key benefits of the suggested comb filter, which represents the novelty of the circuit by overcoming the literature research gaps, can be summarized as follows: Minimal Active Building Blocks: The proposed comb filter is notably efficient regarding active components, requiring only 4 VDCCs. Meanwhile, in [3] , [4] , [5] , [6] , [7] , [8] , more than four active building blocks are used. Reduced Passive Components: Besides its frugality with active components, the proposed filter employs fewer passive components than [3] , [4] , [5] , [6] , [7] , [8] .…”

“…Meanwhile, in [3] , [4] , [5] , [6] , [7] , [8] , more than four active building blocks are used. Reduced Passive Components: Besides its frugality with active components, the proposed filter employs fewer passive components than [3] , [4] , [5] , [6] , [7] , [8] . Low MOSFET Count: Compared to alternative approaches in [3] , [4] , [5] , [6] , [7] , [8] , the proposed filter demands a mere 48 MOSFETs, contributing to its efficiency and simplicity.…”

“… Reduced Passive Components: Besides its frugality with active components, the proposed filter employs fewer passive components than [3] , [4] , [5] , [6] , [7] , [8] . Low MOSFET Count: Compared to alternative approaches in [3] , [4] , [5] , [6] , [7] , [8] , the proposed filter demands a mere 48 MOSFETs, contributing to its efficiency and simplicity. Orthogonal Parameter Relationship: The filter establishes an orthogonal correlation between the pole frequency and the quality factor, enhancing flexibility and adaptability for various applications.…”

Synthesis of Power Line Notch Filter in Wearable Biomedical Devices for Wireless Body Area Network

“…To suppress or attenuate the 50Hz or 60Hz PLI, a variety of analog notch filters designed with distinct active blocks have been proposed by several researchers, aimed at processing different types of biomedical signals. These circuits, which employ current-mode active blocks such as the secondgeneration current conveyor (CCII) [15][16][17], differential difference current conveyor (DDCC) [18], and differential voltage current conveyor (DVCC) [19], hold distinct advantages, including a larger dynamic range, simpler circuit architecture, and lower power consumption.…”