Method and apparatus for battery drain reduction by adjusting for dynamic changes of receiver warm-up time

DETAILED DESCRIPTION Briefly, according to the invention, the current drain of a battery in a portable receiver, such as a selective call receiver, is minimized by monitoring the warm-up time of certain components of the receiver to determine changes.
The receiver is powered up prior to designated time slots by a time period according to the dynamic changes in receiver warm-up time.
According to one aspect of the present invention, a system is provided for minimizing battery drain in a portable receiver by compensating for dynamic changes in a warm-up time of a component of the portable receiver comprising circuitry (microcomputer-based) for periodically monitoring the dynamically changing warm-up time of a component of the receiver which is slowest to warm-up, and for initiating warm-up of that component on the basis of the dynamically changing warm-up time, prior to time slots requiring wake-up of the component of the receiver.
In accordance with another aspect of the present invention, a method is provided for dynamically adjusting for the warm-up time of a component in a portable communication receiver device, the method comprising steps of initiating warm-up of the component; monitoring an operating condition of the component to determine when the component is warmed up; and setting an optimal warm-up time to a time duration substantially equal to the elapsed time between initiating warm-up of the component and the instant of time when it is determined the component is warmed up.
These steps are repeated periodically to determine a current optimal warm-up time of the component.