Noise-shaping pulse-density modulation in inhibitory neural networks with subthreshold neuron circuits

2007 ◽  
Vol 1301 ◽  
pp. 71-74
Author(s):  
Akira Utagawa ◽  
Tetsuya Asai ◽  
Tetsuya Hirose ◽  
Yoshihito Amemiya
Keyword(s):  
Neural Networks ◽  
Noise Shaping ◽  
Pulse Density ◽  
Density Modulation ◽  
Pulse Density Modulation

scholarly journals A Neuromorphic Single-Electron Circuit for Noise-Shaping Pulse-Density Modulation

2011 ◽  
pp. 149-160
Author(s):  
Andrew Kilinga Kikombo ◽  
Tetsuya Asai ◽  
Takahide Oya ◽  
Alexandre Schmid ◽  
Yusuf Leblebici ◽  
...  
Keyword(s):  
Capacitive Coupling ◽  
Single Electron ◽  
Noise Shaping ◽  
Neuronal Circuits ◽  
Circuit Performance ◽  
Thermally Induced ◽  
Pulse Density ◽  
Inhibitory Feedback ◽  
Density Modulation ◽  
Pulse Density Modulation

We propose a bio-inspired circuit performing pulse-density modulation with single-electron devices. The proposed circuit consists of three single-electron neuronal units, receiving the same input and are connected to a common output. The output is inhibitorily fedback to the three neuronal circuits through a capacitive coupling. The circuit performance was evaluated through Monte-Carlo based computer simulations. We demonstrated that the proposed circuit possesses noise-shaping characteristics, where signal and noises are separated into low and high frequency bands respectively. This significantly improved the signal-to-noise ratio (SNR) by 4.34 dB in the coupled network, as compared to the uncoupled one. The noise-shaping properties are as a result of i) the inhibitory feedback between the output and the neuronal circuits, and ii) static noises (originating from device fabrication mismatches) and dynamic noises (as a result of thermally induced random tunneling events) introduced into the network.

scholarly journals A pulse-density modulation circuit exhibiting noise shaping with single-electron neurons

2009 ◽  
Author(s):  
Andrew Kilinga Kikombo ◽  
Tetsuya Asai ◽  
Takahide Oya ◽  
Alexandre Schmid ◽  
Yusuf Leblebici ◽  
...  
Keyword(s):  
Single Electron ◽  
Noise Shaping ◽  
Pulse Density ◽  
Density Modulation ◽  
Pulse Density Modulation

A Neuromorphic Single-Electron Circuit for Noise-Shaping Pulse-Density Modulation

2009 ◽  
Vol 1 (2) ◽  
pp. 80-92 ◽  
Author(s):  
Andrew Kilinga Kikombo ◽  
Tetsuya Asai ◽  
Takahide Oya ◽  
Alexandre Schmid ◽  
Yusuf Leblebici
Keyword(s):  
Single Electron ◽  
Noise Shaping ◽  
Pulse Density ◽  
Density Modulation ◽  
Pulse Density Modulation
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