Title :
An a VLSI basis for dendritic adaptation
Author :
Rasche, Christoph
Author_Institution :
Inst. of Neuroinf., Eidgenossische Tech. Hochschule, Zurich, Switzerland
fDate :
6/1/2001 12:00:00 AM
Abstract :
An analog electronic circuit has been developed and described that adapts the electrotonic properties of a silicon dendrite. The dendrite is modeled by the method of compartmental modeling, consisting of three dendritic compartments each containing a synaptic conductance, and one somatic compartment containing a spiking mechanism. Dendritic synaptic input is represented as an activity signal, which scales the leakage conductance of the dendrite. This adaptive feedback loop ensures a controlled synaptic integration in the dendrite, and so regulates the somatic firing frequency. The general adaptive mechanism can therefore be used for building highly dynamic neural networks
Keywords :
VLSI; adaptive systems; analogue integrated circuits; analogue processing circuits; circuit feedback; delay lines; electric admittance; neural chips; silicon; RC delay line; Si; Si dendrite; VLSI; activity signal; adaptive feedback loop; analog electronic circuit; compartmental modeling; controlled synaptic integration; dendritic adaptation; dendritic synaptic input; highly dynamic neural networks; leakage conductance scaling; somatic compartment; somatic firing frequency regulation; spiking mechanism; synaptic conductance; Biological system modeling; Biomembranes; Circuit simulation; Electric resistance; Electronic circuits; Frequency; Immune system; Neurons; Resistors; Silicon;
Journal_Title :
Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on
