A low-voltage and low-power sinh-domain universal biquadratic filter for low-frequency applications

Abstract

Sinh-domain CMOS filters have favorable properties, such as a wide dynamic range at low supply voltage, compactness, linearity, and low power consumption. These properties are becoming increasingly important for biomedical applications that require extremely low-power dissipation and neuromorphic circuits that attempt to reproduce the biophysics of biological neurons and synapses. In this paper, a low-voltage sinh-domain universal biquadratic filter circuit is introduced. The circuit, aside from permitting the independent adjustment of pole frequency ( ω0) and the quality factor (Q), is free from matching conditions, capable of absorbing the shunt parasitic capacitances, amenable for monolithic integration, and composed of merely a few transconductor cells and grounded elements. The other features of the circuit are its low sensitivity and good linearity. Simulated results are obtained to prove the theoretical analyses and the filter shows a dynamic range of 59.17 dB and power consumption of only 19.2 nW.

An area‐efficient, large time‐constant log‐domain filter for low‐frequency applications

“…Hence, the area of the proposed design reduces significantly without compromising much on linearity. FoM of the filter is better than the designs given in Khanday and Shah, 25 Tsirimokou and Psychalinos, 15 Kafe and Psychalinos, 16…”

Sinh-ortam süzgeçlerinin biyomedikal uygulama örneklerinin incelenmesi

“…Tasarım topolojisine göre bu devrelere karekök-ortam devreleri adı verilmiştir. Aktif bölgedeki BJT ya da zayıf evirtim bölgesindeki MOSFET tarafından oluşturulan translineer döngüler tarafından gerçekleştirilen hiperbolik sinüs fonksiyonu ile oluşturulan devrelere ise sinh-ortam devreleri denmektedir [6]- [14], [16]- [17], [19]- [20], [23]- [58]. Sinh-ortam süzgeçleri ilk olarak Frey tarafından 1993'te önerilmiştir [6]…”