Data carrier for processing signal stream according to transmission protocols has an active processing circuit and a passive signal processing circuit with power supplies
US7272729B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 2002 |
| Grant date | Sep 18, 2007 |
| Priority date | — |
| Expiry date | Oct 29, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/0723
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a data carrier (1) and in an integrated circuit (5), a first signal processing circuit (8) with a signal-independent power supply is provided for processing a signal stream (SF1) in accordance with a first transmission protocol, and a second signal processing circuit (9) with a signal-dependent power supply is provided for processing a signal stream (SF2) in accordance with a second transmission protocol, which signal stream (SF2) in accordance with the second transmission protocol comprises a signal characteristic, namely a lead signal (VLS), and a detection circuit (25) is provided, which detection circuit is designed for detecting the lead signal (VLS) and ensuring the supplying of the second signal processing circuit (9) with power from a power source (14) provided for the second signal processing circuit (9) following a recognition of the occurrence of the lead signal (VLS).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.