Analog-stochastic converter for converting analog signal into probability signal based on threshold switching element
AssigneePostech Research and Business Development Foundation
InventorsHyun Sang Hwang, Myoung Hoon Kwak
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Abstract
There is provided an analog-stochastic converter for converting an analog voltage signal into a pulse signal having a corresponding probability. The analog-stochastic converter is implemented using a threshold switching element and a simple logic circuit, thereby reducing a size of the analog-stochastic converter and enabling a low power operation thereof. In addition, in order to update a weight, instead of an analog signal, a probability signal is applied using the above-described analog-stochastic converter, thereby updating a weight in a fully-parallel manner in a synaptic element array having an intersection structure. Accordingly, it is possible to shorten a time for weight update.
Claims14
An analog-stochastic converter, comprising:
- a threshold switching element configured to receive a pulse signal corresponding to an analog signal and be turned on according to the input -pulse signal to output a turn-on signal;
- and
- a probability conversion circuit configured to detect the turn-on signal output from the threshold switching element and convert the analog signal into a probability signal using the detected turn-on signal,
- wherein the probability conversion circuit includes:
- a transistor which is configured to receive the turn-on signal and in which a sample signal is to be applied to a gate thereof;
- a capacitor connected to the transistor and configured to store the turn-on signal;
- and
- an AND gate configured to receive a storage signal stored in the capacitor and a select signal and output the probability signal.
An analog-stochastic converter, comprising:
- a threshold switching element configured to receive a pulse signal corresponding to an analog signal and be turned on according to the pulse signal to output a turn-on signal;
- and
- a probability conversion circuit configured to detect the turn-on signal output from the threshold switching element and convert the analog signal into a probability signal using the detected turn-on signal,
- wherein the probability conversion circuit includes:
- a transistor which is configured to receive the turn-on signal and in which a sample signal is to be applied to a gate thereof;
- a capacitor connected to the transistor and configured to store the turn-on signal;
- a NOT gate configured to receive a storage signal stored in the capacitor and invert the storage signal to output an inverted signal;
- and
- a NOR gate configured to receive the inverted signal and the pulse signal and output the probability signal.
Dependencies are inferred from the claim text.