Circuit for monitoring a digital signal generator
US4385385A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 30, 1980 |
| Grant date | May 24, 1983 |
| Priority date | — |
| Expiry date | Dec 30, 2000 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q1/4575
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A monitoring circuit for monitoring a digital signal generator which generates signals that are linear combinations of sinewave signals each of whose frequencies are defined by a coefficient K that is proportional to the corresponding frequency. The generator including means for storing the coefficients corresponding to all the signals to be emitted, the coefficients having an integer portion and a fraction portion whose number of digits defines the smallest possible coefficient value which corresponds to a signal of minimum frequency fm such that all signals emitted by the generator are at frequencies which are multiples of the frequency fm. The monitoring circuit includes a redundancy calculator circuit (EX, RR) connected to the output S of the generator (G), and comparator means (CC) comparing the redundancy calculated by the redundancy calculator circuit with a stored constant theoretical value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.