Low noise transmission of output data from a delta-sigma modulator
US5528239A · kind A · utility
17Cited by
12References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 17, 1992 |
| Grant date | Jun 18, 1996 |
| Priority date | — |
| Expiry date | Apr 17, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M3/458
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
The output gates of a delta-sigma modulator can generate i(t) transient signal in the power supply lines of a delta-sigma modulator. These i(t) spikes, which would otherwise produce non-linearities which can be coupled into the frequency band of interest of the modulator, are made to be linear by using return-to-zero data encoding and by providing multi-bit outputs to the delta-sigma modulator in which the output states all have equal numbers of logic ones at the output lines for each of the output states.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.