Method and device for the storage and multiplication of analog signals
US3956624A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 29, 1974 |
| Grant date | May 11, 1976 |
| Priority date | — |
| Expiry date | Apr 29, 1994 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C27/005
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a method and a device for multiplying analog signals in integrated circuit elements, the memory elements are constituted by field-effect transistors having a number of layers of different dielectrics between the gate and the doped semiconductor substrate of the transistor. After discrete sampling of the analog signal has been performed at N points, the N amplitudes corresponding to the N points are stored in N transistors in the form of a threshold voltage. A multiplication of two corresponding terms is performed by recording the signal which is proportional to one sample of a function in the memory of the multiple dielectric layer type and by applying a given voltage to the gate of the transistor so as to generate a signal which is a linear function of the threshold voltage which is in turn a linear function of the writing signal at the input of a multiplier circuit. There is also applied to the multiplier circuit a signal which is a linear function, a sample of another function which is to be multiplied term by term with the first function.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.