Asynchronous signal input apparatus and sampling frequency conversion apparatus
US6263036A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 1998 |
| Grant date | Jul 17, 2001 |
| Priority date | — |
| Expiry date | Jul 29, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2205/061
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
An asynchronous signal input apparatus includes a memory device which writes data that are input at a predetermined frequency, in response to a write signal, and reads data in response to a read signal. A data quantity measuring device measures a data quantity representing a quantity of data stored in the memory device. A read signal generating device generates the read signal at a frequency that varies depending upon the measured data quantity. A sampling frequency conversion apparatus comprises the memory device, data quantity measuring device, and read signal generating device employed in the asynchronous signal input apparatus. Further, the read signal generating device includes a converter which performs non-linear conversion on the data quantity measured by the data quantity measuring device. An interpolation information producing device produces interpolation information to be used for data generated from the memory device, based on the data quantity to which the non-linear gain is given by the converter. An interpolation device interpolates data that are read from the memory device in response to the read signal, based on the produced interpolation information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.