Over-voltage protection accounting for battery droop
First Claim
1. A method comprising:
- measuring a battery voltage of a battery of a mobile terminal at a no-load condition to provide a no-load battery voltage;
measuring the battery voltage of the battery at a full-load condition during a first transmit burst to provide a full-load battery voltage;
measuring a current provided from the battery to power amplifier circuitry in a transmit chain of the mobile terminal at a full-load condition during the first transmit burst to provide a full-load current;
determining a battery resistance based on the no-load battery voltage, the full-load battery voltage, and the full-load current; and
compensating for a voltage droop of the battery expected for a subsequent transmit burst based on the battery resistance during over-voltage detection and correction for the subsequent transmit burst.
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Accused Products
Abstract
An over-voltage detection and correction system for a transmitter of a mobile terminal that accounts for battery droop during a transmit burst is provided. In general, prior to ramp-up for a first transmit burst, a voltage of the battery of the mobile terminal at a no-load condition is measured. After ramp-up for the transmit burst, the voltage of the battery is measured at full-load, and a current provided to a power amplifier of the transmitter at full-load is detected. Based on the measured voltage of the battery at no-load, the measured voltage of the battery at full-load, and the detected current provided to the power amplifier at full-load, a resistance of the battery is determined. The resistance of the battery is thereafter used to compensate for battery droop during over-voltage detection and correction for one or more subsequent transmit bursts.
79 Citations
18 Claims
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1. A method comprising:
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measuring a battery voltage of a battery of a mobile terminal at a no-load condition to provide a no-load battery voltage; measuring the battery voltage of the battery at a full-load condition during a first transmit burst to provide a full-load battery voltage; measuring a current provided from the battery to power amplifier circuitry in a transmit chain of the mobile terminal at a full-load condition during the first transmit burst to provide a full-load current; determining a battery resistance based on the no-load battery voltage, the full-load battery voltage, and the full-load current; and compensating for a voltage droop of the battery expected for a subsequent transmit burst based on the battery resistance during over-voltage detection and correction for the subsequent transmit burst. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification