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US 9,286,566 B2Granted
Visual cortical circuit apparatus, visual cortical imitation system and object search system using visual cortical circuit apparatus
AssigneeKorea Advanced Institute of Science and Technology
InventorsIl Song Han, Woo Joon Han
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Abstract
Provided us a visual cortical circuit apparatus comprising: a current mirror unit which uses a transistor as a current source to generate a current having the same size as that of a reaction; a transconductance unit which takes, as an input, the current generated by the current mirror unit and outputs a voltage using a transconductance; and a buffer unit for converting the voltage output from the transconductance unit into a current and buffering the current.
Claims5
A visual cortical circuit apparatus
- for constructing a circuit for implementing a visual cortex response to stimuli over the period of neuron response time in a form of a voltage and
- outputting a voltage equivalent to the voltage, comprising:
- a current mirror unit for using a transistor as a current source to generate a current of the same magnitude as the response;
- a transconductance unit for receiving a current generated by the current mirror unit as an input and outputting a voltage using transconductance;
- a buffer unit for converting a voltage output by the transconductance unit into a current and buffering the current;
- and
- a bipolar switch unit, wherein any one of outputs from the buffer unit is switched on if a membrane potential proceeds across a neuron so that the neuron becomes activated, and switched off if a membrane potential proceeds across a neuron so that the neuron becomes deactivated;
- wherein each unit is a circuit.
5 more elements
A visual cortical imitation system using a visual cortical circuit apparatus, comprising:
- a bias unit for applying a bias voltage to maintain a reference operating point when a response output from the visual cortical circuit apparatus over the period of neuron response time is smaller in magnitude than a predetermined threshold value;
- a current mirror unit for using a transistor as a current source to generate a current having a same magnitude as an current inputted by the bias unit;
- a transconductance unit for receiving, as an input, a current generated by the current mirror unit and outputting a voltage using transconductance;
- a buffer unit for converting a voltage output by the transconductance unit into a current and buffering the current;
- and
- a bipolar switching unit, wherein any one of outputs from the buffer unit is switched on if a membrane potential proceeds across a neuron so that the neuron becomes activated, and switched off if a membrane potential proceeds across a neuron so that the neuron becomes deactivated;
- wherein each unit is a circuit.
4 more elements
Dependencies are inferred from the claim text.