Switched-current type of hamming neural network system for pattern recognition
US5999643A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 1998 |
| Grant date | Dec 7, 1999 |
| Priority date | — |
| Expiry date | Apr 6, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V30/194
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Disclosed is a two-layer switched-current type of a Hamming neural network system. This Hamming network system includes a matching rate computation circuit for modules on a first layer used to compute a matching rate between a to-be-identified pattern and each one of a plurality of standard patterns, a matching rate comparison circuit on a second layer for ranking an order of the matching rates including a switched-current type order-ranking circuit for receiving switched-current signals, finding a maximum value and outputting a time-division order-ranking output and an identification-rejection judgment circuit for performing an absolute and a relative judgment, and a pulse-generating circuit for generating sequential clock pulses, in which the circuit construction of the Hamming network is simple and flexible due to a modular design with extendible circuit dimensions, and a high precision, improved performance and enhanced reliability of the network system is achieved. In addition, the Hamming network can be easily integrated in a mixed analog/digital form due to a direct usage of a standard complementary metal-oxide-semiconductor device by using a switched-current technique.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.