US 12,266,961 B2
Apparatus and methods for transferring charge
John Paul Lesso, Edinburgh (GB); Toru Ido, Tokyo (JP); and Claire Motion, Edinburgh (GB)
Assigned to Cirrus Logic Inc., Austin, TX (US)
Filed by Cirrus Logic International Semiconductor Ltd., Edinburgh (GB)
Filed on May 25, 2022, as Appl. No. 17/824,687.
Prior Publication US 2023/0387705 A1, Nov. 30, 2023
Int. Cl. H02J 7/00 (2006.01); G01N 27/403 (2006.01); G01R 31/385 (2019.01); H02J 7/34 (2006.01)
CPC H02J 7/0048 (2020.01) [G01N 27/403 (2013.01); G01R 31/385 (2019.01); H02J 7/007 (2013.01); H02J 7/34 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An apparatus for delivering power from a battery node of a battery to an output node, the output node coupled to an analyte monitoring device, the apparatus comprising:
a slow charging path between the battery node and the output node;
a fast charging path parallel to the slow charging path, the fast charging path switchably coupled between the battery node and the output node; and
control circuitry configured to:
selectively couple the fast charging path between the battery node and the output node to allow faster transfer of charge between the battery node and the output node than the slow charging path;
wherein the slow charging path comprises:
a reservoir capacitor coupled between a reservoir node in the slow charging path and a second reference voltage; and
a first voltage regulator coupled between the battery node and the reservoir node for regulating a reservoir voltage at the reservoir node;
the apparatus further comprising a third voltage regulator in the fast charging path configured to regulate the input voltage at he output node when the fast charging path is coupled between the battery node and the output node.