| 摘要 |
GPS navigation devices or GPS receivers can consume less power by using a temperature recorder circuit and/or a power manager in calculating the accuracies of the GPS system time and reference frequency to improve battery life. A representative receiver includes a time reference device that generates data associated with a GPS system time, and a temperature recorder circuit that operates using the generated data from the time reference device and monitors the temperature of the time reference device while the receiver hibernates. The receiver further includes memory including a power manager that has instructions, which are processed by a processing device after the receiver wakes up. The instructions associated with the power manager include determining if the temperature recorder circuit sent a wake-up signal, reading data from the temperature recorder circuit, and adjusting parameters associated with at least one of the following: the time reference device and the temperature recorder circuit. |
