Over-voltage protection accounting for battery droop
First Claim
1. A mobile terminal comprising:
- an over-voltage detection and correction system adapted to;
i) measure a battery voltage of a battery of the mobile terminal at a no-load condition to provide a no-load battery voltage;
ii) measure the battery voltage of the battery at a full-load condition during a first transmit burst to provide a full-load battery voltage;
iii) measure 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;
iv) determine a battery resistance based on the no-load battery voltage, the full-load battery voltage, and the full-load current; and
v) compensate 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.
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Citations
7 Claims
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1. A mobile terminal comprising:
an over-voltage detection and correction system adapted to; i) measure a battery voltage of a battery of the mobile terminal at a no-load condition to provide a no-load battery voltage; ii) measure the battery voltage of the battery at a full-load condition during a first transmit burst to provide a full-load battery voltage; iii) measure 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; iv) determine a battery resistance based on the no-load battery voltage, the full-load battery voltage, and the full-load current; and v) compensate 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)
Specification