Method and circuit for suppression of quantitizing noise ambiguities
US4680774A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 16, 1986 |
| Grant date | Jul 14, 1987 |
| Priority date | — |
| Expiry date | Jan 16, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/1047
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
To suppress quantitizing ambiguities upon digital transmission of an analog signal, a random access memory (RAM) (13) is connected at the end terminal of a digital transmission line, and has its output connected to an adder stage (15). The adder stage adds the digital value of +1 to the output from the RAM (13). The value of the digitized data word, incremented by +1, is then compared in a subsequent interrogation cycle of the value at the input to the memory and only if the deviation is greater than .+-.1, a comparator, effecting the comparison, provides a "store" signal for transfer of the new value to the RAM (13). The D/A converters, only then, are changed to provide a changed output analog signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.