เปรียบเทียบวิธี

	การออกแบบตัวกรองแบบ Butterworth	ตัวกรองที่เข้าคู่กัน
สาขาวิชา	การประมวลผลสัญญาณ	การประมวลผลสัญญาณ
ตระกูล	Process / pipeline	Process / pipeline
ปีกำเนิด	1930	1943
ผู้ริเริ่ม	Stephen Butterworth	D. O. North
ประเภท	Infinite Impulse Response (IIR) filter design	Optimal filter for signal detection
แหล่งต้นตำรับ	Butterworth, S. (1930). On the Theory of Filter Amplifiers. Wireless Engineer and Experimental Wireless, 7, 536–541.	North, D. O. (1943). An Analysis of the Factors Which Determine Signal/Noise Discrimination in Pulsed Carrier Systems. RCA Laboratories, Technical Report PTM-946.
ชื่อเรียกอื่น	Butterworth IIR Design, Butterworth Lowpass Filter	Correlation Detector, Optimal Filter Detection, Template Matching
ที่เกี่ยวข้อง	4	4
สรุป	The Butterworth filter is a type of signal processing filter designed to have the flattest possible frequency response in the passband while rolling off toward the stopband with a gentle slope. Introduced by Stephen Butterworth in 1930, it has become one of the most widely used filter designs in electrical engineering and digital signal processing due to its predictable and smooth frequency characteristics.	The matched filter is an optimal signal detector that maximizes the signal-to-noise ratio (SNR) for detecting a known signal in additive Gaussian noise. Developed by D. O. North during World War II for radar applications, the matched filter represents the optimal linear filter for signal detection and remains the foundation for detection theory and digital communications.