Common-Mode Noise Suppression of Differential Serpentine Delay Line Using Timing-Offset Differential Signal

2015 ◽  
Vol 57 (6) ◽  
pp. 1457-1465 ◽  
Author(s):  
Chih-Chen Yeh ◽  
Kuan-Chung Chen ◽  
Chun-Long Wang
Keyword(s):  
Delay Line ◽  
Noise Suppression ◽  
Common Mode ◽  
Differential Signal ◽  
Timing Offset

Reduction of Common-Mode and Differential-Mode Noises Using Timing-Offset Differential Signal

2015 ◽  
Vol 5 (12) ◽  
pp. 1818-1827 ◽  
Author(s):  
Chih-Chen Yeh ◽  
Bao-Ren Huang ◽  
Kuan-Chung Chen ◽  
Ruei-Ying Fang ◽  
Chun-Long Wang
Keyword(s):  
Differential Mode ◽  
Common Mode ◽  
Differential Signal ◽  
Timing Offset

Signals and noise in the elasmobranch electrosensory system

1999 ◽  
Vol 202 (10) ◽  
pp. 1349-1355 ◽  
Author(s):  
J.C. Montgomery ◽  
D. Bodznick
Keyword(s):  
Direct Current ◽  
Noise Suppression ◽  
Receptive Fields ◽  
Sensory System ◽  
Mate Recognition ◽  
Common Mode ◽  
Central Processing ◽  
Temporal Properties ◽  
Efferent Neurons ◽  
Bioelectric Fields

Analyzing signal and noise for any sensory system requires an appreciation of the biological and physical milieu of the animal. Behavioral studies show that elasmobranchs use their electrosensory systems extensively for prey detection, but also for mate recognition and possibly for navigation. These biologically important signals are detected against a background of self-generated bioelectric fields. Noise-suppression mechanisms can be recognized at a number of different levels: behavior, receptor anatomy and physiology, and at the early stages of sensory processing. The peripheral filters and receptor characteristics provide a detector with permissive temporal properties but restrictive spatial characteristics. Biologically important signals probably cover the range from direct current to 10 Hz, whereas the bandwidth of the receptors is more like 0.1-10 Hz. This degree of alternating current coupling overcomes significant noise problems while still allowing the animal to detect external direct current signals by its own movement. Self-generated bioelectric fields modulated by breathing movement have similar temporal characteristics to important external signals and produce very strong modulation of electrosensory afferents. This sensory reafference is essentially similar, or common-mode, across all afferent fibers. The principal electrosensory neurons (ascending efferent neurons; AENs) of the dorsal octavolateralis nucleus show a greatly reduced response to common-mode signals. This suppression is mediated by the balanced excitatory and inhibitory components of their spatial receptive fields. The receptive field characteristics of AENs determine the information extracted from external stimuli for further central processing.

scholarly journals An improved AC-amplifier for electrophysiology

2009 ◽  
Vol 19 (1) ◽  
pp. 7-12
Author(s):  
Nikola Jorgovanovic ◽  
Dubravka Bojanic ◽  
Vojin Ilic ◽  
Darko Stanisic
Keyword(s):  
Dynamic Range ◽  
Cutoff Frequency ◽  
Instrumentation Amplifier ◽  
Single Chip ◽  
Common Mode ◽  
Differential Signal ◽  
Op Amp ◽  
Chip Technology ◽  
The Common ◽  
Dc Component

We present the design, simulation and test results of a new AC amplifier for electrophysiological measurements based on a three op-amp instrumentation amplifier (IA). The design target was to increase the common mode rejection ratio (CMRR), thereby improving the quality of the recorded physiological signals in a noisy environment. The new amplifier actively suppresses the DC component of the differential signal and actively reduces the common mode signal in the first stage of the IA. These functions increase the dynamic range of the amplifier's first stage of the differential signal. The next step was the realization of the amplifier in a single chip technology. The design and tests of the new AC amplifier with a differential gain of 79.2 dB, a CMRR of 130 dB at 50 Hz, a high-pass cutoff frequency at 0.01 Hz and common mode reduction in the first stage of the 49.8 dB are presented in this paper.

Common-Mode Noise Suppression Technique in Interferometric Fiber-Optic Sensors

2019 ◽  
Vol 37 (21) ◽  
pp. 5619-5627 ◽  
Author(s):  
Fei Liu ◽  
Shangran Xie ◽  
Lijuan Gu ◽  
Xiangge He ◽  
Duo Yi ◽  
...  
Keyword(s):  
Noise Suppression ◽  
Fiber Optic ◽  
Fiber Optic Sensors ◽  
Common Mode ◽  
Suppression Technique

scholarly journals Compact closed‐loop resonator filters with wide spurious free band and extended common‐mode noise suppression

2020 ◽  
Vol 14 (9) ◽  
pp. 860-866
Author(s):  
Arcesio Arbelaez ◽  
Jose‐Luis Olvera ◽  
Alonso Corona ◽  
Carlos Saavedra
Keyword(s):  
Closed Loop ◽  
Noise Suppression ◽  
Common Mode ◽  
Free Band ◽  
Resonator Filters
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