Patent · US Active

Integrated circuit for remote keyless entry system

US9806405B2 · kind B2 · utility

0Cited by

10References

20Claims

0Family size

Assignee

Atmel Corporation · US

Inventors

Thorsten Fahlbusch · Frankfurt am Main, DE
Marco Schwarzmueller · Heilbronn, DE
Juergen Schnabel · Leingarten, DE

Key dates

Filing date	Jan 31, 2013
Grant date	Oct 31, 2017
Priority date	—
Expiry date	Apr 1, 2035

Classification

Technology area (CPC H)Electricity
CPC primaryH01Q5/50
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

An integrated circuit for use in remote keyless entry (RKE) applications is disclosed that integrates two drivers with a shared dual mode antenna. The drivers may be integrated on a single integrated circuit chip using high voltage (HV) complementary metal-oxide-semiconductor (CMOS) processes. In immobilizer mode of operation, an immobilizer driver coupled to the dual mode antenna is configured to drive the dual mode antenna, while an LF mode driver coupled to the dual mode antenna is configured to be idle. In LF mode of operation, the LF mode driver is configured to drive the dual mode antenna, while the immobilizer driver is configured to be idle. In some implementations, the drivers are coupled to a common node coupled to the dual mode antenna and are selectively biased with different supply voltages based on the current mode of operation to prevent current leakage and component damage.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.