US 12,034,442 B2
Configurable ground switch to support power delivery between two supply domains
Donelson A. Shannon, Austin, TX (US); and Jianping Wen, Austin, TX (US)
Assigned to Cirrus Logic Inc., Austin, TX (US)
Filed by Cirrus Logic International Semiconductor Ltd., Edinburgh (GB)
Filed on Sep. 20, 2022, as Appl. No. 17/948,442.
Prior Publication US 2024/0097683 A1, Mar. 21, 2024
Int. Cl. G11C 5/14 (2006.01); G11C 17/00 (2006.01); H03K 19/0185 (2006.01)
CPC H03K 19/018507 (2013.01) [G11C 5/14 (2013.01); G11C 17/00 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A system comprising:
a first power domain defined by a first supply rail and a first ground rail;
a second power domain defined by a second supply rail and a second ground rail; and
a configurable switch coupled between the first ground rail and the second ground rail such that:
when the configurable switch is enabled, the first ground rail and the second ground rail are electrically shorted to one another; and
when the configurable switch is disabled, the first ground rail and the second ground rail are electrically isolated from one another, wherein a first impedance between the first supply rail and the first ground rail is lower than a second impedance between the first supply rail and the second ground rail when the configurable switch is disabled.