Sample rate conversion systems with an independent internal oscillator
US7567641B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 16, 2004 |
| Grant date | Jul 28, 2009 |
| Priority date | — |
| Expiry date | Jul 14, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03H17/0628
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Because of the natural ability to reject clock jitter, the SRC circuits include an internal oscillator to provide an operating clock signal. The internal oscillator can be operated independently of any external frequency control signal, including input and output frame clocks. The internal oscillator can be implemented as a relatively low-cost fixed frequency oscillator. The use of a relatively low precision, inexpensive internal oscillator in an SRC circuit reduces the overall cost of SRC circuits while providing acceptable performance. Accordingly, reducing costs of SRC circuits also has a positive cost/benefit affect on the digital signal processing systems that use SRC circuits.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.