US 12,456,974 B2
Soft switching device, electronic system with soft switching device with an electrical power source
Christoph Kuratli, La Neuveville (CH); and Lubomir Plavec, Brno (CZ)
Assigned to EM Microelectronic-Marin SA, Marin (CH)
Filed by EM Microelectronic-Marin SA, Marin (CH)
Filed on Jun. 20, 2023, as Appl. No. 18/337,711.
Claims priority of application No. 22182909 (EP), filed on Jul. 4, 2022.
Prior Publication US 2024/0007099 A1, Jan. 4, 2024
Int. Cl. H03K 17/16 (2006.01)
CPC H03K 17/166 (2013.01) 11 Claims
OG exemplary drawing
 
1. A soft switching device for connecting a power supply to at least one electronic unit of an electronic system, so as to be activated via the soft switching device to the power supply, the soft switching device comprising:
a switch component with a control terminal and a current source connected to the control terminal to control the switch component closure when the current source is activated; and
a soft transition element of capacitive type between the output terminal and the control terminal of the switch component so as to gradually or progressively close the switch for connection to a power supply,
wherein a third NMOS current source transistor is connected through its gate to a gate of a first NMOS transistor and a gate of a second NMOS transistor of the current source through a first connection, and its source at 0 V, wherein a drain of the third NMOS transistor is connected to a drain of a third PMOS transistor and to one side of a second charge storage capacitor through a second connection, the other side of which is connected to a ground terminal, and wherein a drain of the switch component is connected to a gate terminal of the third PMOS transistor through a third connection,
wherein the first connection, the second connection, and the third connection are separate from one another.