中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

16 records (took 0.022 seconds)

    12.
    发明专利
    未知

    公开(公告)号：NO20010084L

    公开(公告)日：2001-02-28

    申请号：NO20010084

    申请日：2001-01-05

    Applicant: QUALCOMM INC

    Inventor： HUTCHISON IV JAMES A ,  HOVE TAD A ,  PETERZELL PAUL E

    IPC: H02J7/34 ,  H01M10/44 ,  H02J7/00 ,  H02J7/02 ,  H04B1/38 ,  H04B7/26 ,  H04M1/72 ,  H04M1/725 ,  H01M10/46

    Abstract: A portable phone has an internal battery and an external battery pack that is releasably attachable to the phone. A control unit in the phone controls connection of the respective batteries to a phone power input, depending on the detection of the external battery voltage. Whenever an external battery is present with a voltage above a predetermined minimum value, the external battery will be connected to the phone power input to provide power to operate the phone, so that the internal battery lifetime is extended. When the external battery voltage falls below the minimum value, or the external battery is removed, the unit automatically switches to internal battery power, so that the external battery can be changed without interrupting power supply to the phone, if the phone is on or during a call. An improved multi-phase software controlled battery-charging method and apparatus is used to charge the internal and external battery packs. The preferred battery-charging method uses a multi-phased charging approach comprising a trickle-charging phase, a fast-charging phase, and a top-off charging phase. The internal battery is charged to near-full capacity by trickle-charging (when required) and subsequently fast-charging the battery. The external battery is similarly charged to near-full capacity. Thus, both batteries are charged to near-full capacity in a substantially reduced charging time period as compared with the total charging time.

    14.
    发明专利
    未知

    公开(公告)号：NO20010084D0

    公开(公告)日：2001-01-05

    申请号：NO20010084

    申请日：2001-01-05

    Applicant: QUALCOMM INC

    Inventor： HUTCHISON IV JAMES A ,  HOVE TAD A ,  PETERZELL PAUL E

    IPC: H02J7/34 ,  H01M10/44 ,  H02J7/00 ,  H02J7/02 ,  H04B1/38 ,  H04B7/26 ,  H04M1/72 ,  H04M1/725 ,  H02J

    Abstract: A portable phone has an internal battery and an external battery pack that is releasably attachable to the phone. A control unit in the phone controls connection of the respective batteries to a phone power input, depending on the detection of the external battery voltage. Whenever an external battery is present with a voltage above a predetermined minimum value, the external battery will be connected to the phone power input to provide power to operate the phone, so that the internal battery lifetime is extended. When the external battery voltage falls below the minimum value, or the external battery is removed, the unit automatically switches to internal battery power, so that the external battery can be changed without interrupting power supply to the phone, if the phone is on or during a call. An improved multi-phase software controlled battery-charging method and apparatus is used to charge the internal and external battery packs. The preferred battery-charging method uses a multi-phased charging approach comprising a trickle-charging phase, a fast-charging phase, and a top-off charging phase. The internal battery is charged to near-full capacity by trickle-charging (when required) and subsequently fast-charging the battery. The external battery is similarly charged to near-full capacity. Thus, both batteries are charged to near-full capacity in a substantially reduced charging time period as compared with the total charging time.

    15.
    发明专利
    未知

    公开(公告)号：NO20002955L

    公开(公告)日：2000-08-10

    申请号：NO20002955

    申请日：2000-06-09

    Applicant: QUALCOMM INC

    Inventor： HEIMBIGNER WADE LYLE ,  HUTCHISON IV JAMES A ,  OLIVEIRA LOUIS D

    IPC: G10L19/16 ,  H03M1/18

    Abstract: An audio band processor and a method and circuit for controlling its gain. The audio band processor comprises a first variable gain amplifier for receiving an analog audio signal; an analog to digital converter for converting the analog audio signal to a digital audio signal; and an interface circuit for encoding the digital audio signal. The interface circuit also arranges the digital audio signal into a sequence of encoded transmit frames, and receives a sequence of encoded receive frames, each receive frame comprising a predetermined number of encoded digital audio signal data bits and a predetermined number of digital gain control bits. The interface circuit also adjusts a gain level of the first variable gain amplifier in response to the digital gain control bits. In another embodiment, the audio band processor further comprises a second variable gain amplifier, and the interface circuit adjusts a gain level of the second variable gain amplifier in response to the digital gain control bits.

Patent Agency Ranking