公开(公告)号：US10110039B2

公开(公告)日：2018-10-23

申请号：US15308316

申请日：2014-06-30

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Thomas Sawyers ,  Jon G Lloyd

IPC: H02J7/00 ,  H03F3/45

Abstract: A system according to examples of the present disclosure includes a battery charger electrically coupled to a battery and a battery charging circuit. The battery charging circuit includes an operational amplifier having a negative input to receive a pre-bias voltage, a positive input, an output, and a voltage offset. The battery charging circuit also includes a charge controller having an analog-to-digital converter to receive a voltage output from the output of the operational amplifier and a voltage supply to supply a voltage input into the positive input of the operation amplifier to cancel the voltage offset of the operational amplifier. In the example, the voltage output of the charge controller is a function of the voltage input of the charge controller.

公开(公告)号：US20200320198A1

公开(公告)日：2020-10-08

申请号：US16481087

申请日：2017-12-19

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Christopher H Stewart ,  Jeffrey P Kenline ,  Brandon Huber ,  Robert Stephen Craig ,  Virupakshi Channagiri ,  Jon G Lloyd ,  Rosilet Braduke ,  Lan Wang ,  Hsin-Ming Yang

IPC: G06F21/57 ,  G06F13/20

Abstract: An example device comprises a plurality of components and a BIOS includes a non-volatile memory having instructions stored thereon that are executable by a processor of the device to cause the BIOS to determine a component identification (ID) of a component of the plurality of components, and fetch a plurality of recall component IDs. The instructions also are to cause the BIOS to compare the determined component ID with the plurality of recall component IDs. In response to a correspondence between the determined component ID and one recall component ID of the plurality of component IDs, the BIOS is to transmit signals representing a prompt to place the component of the plurality of components in a safety mode. The instructions also cause the BIOS to receive signals in response to the prompt and, responsive to the received signals, disable the component of the plurality of components.

公开(公告)号：US09910450B2

公开(公告)日：2018-03-06

申请号：US14779162

申请日：2013-04-12

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Thomas Sawyers ,  Jon G Lloyd

IPC: G01N27/00 ,  G05F1/46 ,  G06F1/26 ,  G01R19/10 ,  G01R19/25 ,  G06F1/16 ,  G01R27/14

CPC classification number: G05F1/46 ,  G01R19/10 ,  G01R19/2506 ,  G01R27/14 ,  G06F1/1632 ,  G06F1/26 ,  H03M1/0619

Abstract: An example provides an apparatus for determining an attribute of an adapter based on a ratio of voltage divider outputs. The apparatus may include a first analog-to-digital converter to provide a first digital signal corresponding to a first output voltage of a first voltage divider connected between a power node and a ground node, the first voltage divider formed, at least in part, when the apparatus is operatively coupled to the adapter. The apparatus may include a second analog-to-digital converter to provide a second digital signal corresponding to a second output voltage of a second voltage divider connected between the power node and the ground node. The attribute of the adapter may be determined based on a ratio of the output voltages.

公开(公告)号：US09734339B2

公开(公告)日：2017-08-15

申请号：US14780977

申请日：2013-04-23

Applicant: HEWLETT-PACKARD DEVELOPMENT COMPANY, L.P.

Inventor： Jeffrey Kevin Jeansonne ,  Jon G Lloyd ,  Rahul V Lakdawala ,  Justin C Prindle

IPC: G06F9/44 ,  G06F21/57 ,  G06F21/60

CPC classification number: G06F21/575 ,  G06F21/606 ,  G06F2221/034

Abstract: A controller monitors for an indication from core logic indicating that the core logic is in a state in which the core logic does not access a bus. In response to detecting the indication, the controller retrieves the system boot code from a non-volatile memory over the bus.