Control device with terminal 15—holding circuit

Details Control device with terminal 15—holding circuit Control device with terminal 15—holding circuit

2011-04-26

2011-04-26

Kaplan, Hal I (Department: 2836)

Electrical transmission or interconnection systems

Vehicle mounted systems

Automobile

C307S010700, C361S090000, C361S092000

Reexamination Certificate

active

07932628

ABSTRACT:
A terminal state of a terminal15of a vehicle is enabled to be maintained for a minimum period of time even after a drop in the voltage supply. At the same time other loads are to have no effect on the holding time. A control device for controls access to a vehicle and has a voltage source, a voltage supply terminal to which a supply voltage can be applied, and a holding circuit to which the voltage source and the voltage supply terminal are connected in a common circuit point for the purpose of holding an On state for as long as the voltage at the voltage source does not fall below a predetermined value. A switching element that is connected into the circuit between the voltage supply terminal and the common circuit point serves to separate the common circuit point from the supply voltage. The holding time is thus decoupled from the VCC currents drawn by other loads.

REFERENCES:
patent: 4587939 (1986-05-01), Hemminger et al.
patent: 6046512 (2000-04-01), Heise
patent: 6531837 (2003-03-01), Forstl et al.
patent: 7078829 (2006-07-01), Hunninghaus et al.
patent: 7485983 (2009-02-01), Asao et al.
patent: 196 02 171 (1997-07-01), None
patent: 19602171 (1997-07-01), None

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