Neural network circuit
AssigneeDenso Corporation
InventorShigeki OTSUKA
Life of this patent
Estimating the term…
Abstract
A neural network circuit includes: multiple storage portions that include a memristor; multiple D/A converters that receive data, causing a signal voltage to be applied to multiple voltage input terminals of the storage portions; multiple drive amplifiers that are connected between to the D/A converters and the voltage input terminals; multiple I/V conversion amplifiers that are connected to at least one current output terminal of the storage portions; multiple A/D converters; and a series circuit of a first switch and a second switch that is disposed in a feedback loop of each of the drive amplifiers; and a series circuit of a third switch and a fourth switch that is disposed in a feedback loop of each of the I/V conversion amplifiers.
Claims5
A neural network circuit comprising:
- a plurality of storage portions that include a memristor, the memristor being a variable resistance element as a storage element and being connected in a lattice shape;
- a plurality of D/A converters that receive data, causing a signal voltage to be applied to a plurality of voltage input terminals of the storage portions;
- a plurality of drive amplifiers that are connected between to the D/A converters and the voltage input terminals;
- a plurality of I/V conversion amplifiers that are connected to at least one current output terminal of the storage portions and are configured to convert a current flowing in the current output terminal into voltage to be output as a signal voltage;
- a plurality of A/D converters that are configured to perform A/D conversion of the signal voltage, which is converted by the I/V conversion amplifiers;
- a series circuit of a first switch and a second switch that is disposed in a feedback loop of each of the drive amplifiers;
- and
- a series circuit of a third switch and a fourth switch that is disposed in a feedback loop of each of the I/V conversion amplifiers,
- wherein:
- a common connection point of the first switch and the second switch is connected to one end of the memristor;
- a common connection point of the third switch and the fourth switch is connected to another end of the memristor;
- and
- the AID converter performs AID conversion of voltage across a feedback resistor of the I/V conversion amplifier.
Dependencies are inferred from the claim text.