Charger system for communication devices using a charger circuit to communicate a charge status to a portable host device
First Claim
1. A charger system for a portable host device comprising:
- a charger circuit operating to communicate a charge status using a charger side communication line selected from a charging status and a charge completed status;
a battery coupled between the portable host device and the charger circuit, the battery comprising a switch circuit connected to the charger side communication line and operating to switch communication to the portable host device in response to the charge status communicated from the charger circuit;
the portable host device;
wherein the charger circuit communicates the charge status by a DC voltage level charge status using the charger side communication line;
wherein the switch circuit comprises;
an output coupled to the portable host device which selectively switches a host side communication line to ground, andan input coupled to the charger circuit which causes the output to switch upon application of a DC voltage level of sufficient duration to exceed a time constant of an input circuit;
wherein the battery further comprises;
a first memory device for communication with the portable host device via the host side communication line, the first memory device is connected with the portable host device independent of the charge status but is readable only by the portable host device when the charge status is the charge completed status; and
a second memory device for communication with the charger circuit via the charger side communication line, the second memory device is connected with the charger circuit independent of the charge status through charger side communication line.
2 Assignments
0 Petitions
Accused Products
Abstract
A charger system (100) for charging a battery power source for a portable host device (102) is provided. The charger system includes a charger circuit (202). The charger circuit operates to communicate a charge status. The charge status can be selected from a charge status group including a charging status and a charge completed status. Further, the charger system includes a battery (108) coupled between the portable host device and the charger circuit. The battery includes a switch circuit (206) operating to switch communication to the portable host device in response to the charge status communicated from the charge circuit. The charger system also includes the portable host device.
35 Citations
14 Claims
-
1. A charger system for a portable host device comprising:
-
a charger circuit operating to communicate a charge status using a charger side communication line selected from a charging status and a charge completed status; a battery coupled between the portable host device and the charger circuit, the battery comprising a switch circuit connected to the charger side communication line and operating to switch communication to the portable host device in response to the charge status communicated from the charger circuit; the portable host device; wherein the charger circuit communicates the charge status by a DC voltage level charge status using the charger side communication line; wherein the switch circuit comprises; an output coupled to the portable host device which selectively switches a host side communication line to ground, and an input coupled to the charger circuit which causes the output to switch upon application of a DC voltage level of sufficient duration to exceed a time constant of an input circuit; wherein the battery further comprises; a first memory device for communication with the portable host device via the host side communication line, the first memory device is connected with the portable host device independent of the charge status but is readable only by the portable host device when the charge status is the charge completed status; and a second memory device for communication with the charger circuit via the charger side communication line, the second memory device is connected with the charger circuit independent of the charge status through charger side communication line. - View Dependent Claims (2, 3, 4, 5, 6, 7)
-
-
8. A charger system for a portable host device comprising:
-
a charger circuit; a portable host device comprising; a pull-up host resistor that electrically couples a host side communication line to a supply voltage, a radio data line control for detecting a state of the host side communication line, and a display for displaying a battery charge state; and a battery coupled between the charger circuit and the portable host device, the battery comprising; a transistor, a first resistor electrically coupled between a gate of the transistor and a second resistor, the second resistor electrically coupled between the first resistor and ground, and a battery Erasable Programmable Read-Only Memory (EPROM) electrically coupled between the transistor and the ground, wherein when the battery is attached to the portable host device and the portable host device is operating without the charger circuit attached, the transistor is held off by the series combination of the first resistor and the second resistor, allowing the pull-up host resistor to bias the host side communication line high, and further wherein the radio date line control of the portable host device is programmed to; detect the host side communication line high, enable radio communication with the battery EPROM, and cause the portable host device to display a battery not charging state as the battery charge state on the display. - View Dependent Claims (9, 10)
-
-
11. A charger system for a portable host device comprising:
-
a charger circuit; a battery coupled between the portable host device and the charger circuit; and the portable host device wherein a charging status is communicated from the charger circuit, using a charger side communication line to the battery, through the battery to the portable device when the charger circuit is charging the battery and a charge completed status is communicated to the portable device, the charge completed status indicated when the charger circuit is not connected to the battery and when the charger circuit is connected to the battery and the battery is completely charged; wherein the battery comprises; a first memory device connected with the portable host device independent of the charge status but readable only by the host device when the charge status is the charge completed status; and a second memory device connected with the charger circuit independent of the charge status through the charger side communication line. - View Dependent Claims (12, 13, 14)
-
Specification