Time error compensating apparatus and method in a terminal

A method for generating time, comprising:

• counting a first clock signal and a second clock signal for a predetermined period of time, said first clock signal having a higher frequency than said second clock signal;
• computing a compensation value of the second clock signal based on count values generated in said counting step;
• and
• correcting time information output by a clock based on said compensation value,
• wherein said computing step includes:
• computing a frequency ratio of the first clock signal and the second clock signal based on said count values;
• computing a frequency of said second clock signal based on the frequency ratio;
• comparing said frequency of said second clock signal to a desired value;
• and
• computing a pulse count compensation value of the second clock signal based on said comparing step.

A time error compensating method, comprising:

• computing a frequency ratio between a first clock signal and a second clock signal, wherein the first clock signal has a higher frequency than the second clock signal;
• computing a frequency of the second clock signal based on the frequency ratio;
• computing a pulse count value based on the frequency of the second clock signal;
• comparing said pulse count value with a reference pulse count value;
• and
• computing a pulse count compensation value for the second clock signal.

A method for generating time, comprising:

• counting a first clock signal and a second count signal for a predetermined period of time, said first clock signal having a higher frequency than said second clock signal;
• determining an actual frequency of the second clock signal using a frequency of the first clock signal;
• comparing the determined actual frequency of the second clock signal with an ideal clock signal corresponding to the second clock signal;
• and
• determining a compensation value to be applied to the frequency of the second clock signal based on the comparison of the ideal clock signal and the determined actual frequency of the second clock signal,
• wherein determining the actual frequency of the second clock signal comprises;
• computing a frequency ratio of the second clock signal to the first clock signal.