Electronic apparatus compensated through monitoring non-temperature factor indicative of frequency drift occurrence of reference clock and related method thereof

Abstract

In one exemplary implementation, an electronic apparatus has a reference clock source for generating a reference clock, a monitoring circuit for monitoring a non-temperature factor indicative of frequency drift occurrence of the reference clock to thereby generate a monitoring result, and a compensating circuit for compensating the reference clock according to the monitoring result. In another exemplary implementation, an electronic apparatus has a reference clock source for generating a reference clock, a processing logic for performing a designated operation according to the reference clock, a monitoring circuit for monitoring a non-temperature factor indicative of frequency drift occurrence of the reference clock to thereby generate a monitoring result, and a compensating circuit for compensating the designated operation according to the monitoring result.

1 . An electronic apparatus, comprising:
 a reference clock source, for generating a reference clock;   a monitoring circuit, for monitoring a non-temperature factor indicative of frequency drift occurrence of the reference clock to thereby generate a monitoring result; and   a compensating circuit, coupled to the reference clock source and the monitoring circuit, for compensating the reference clock according to the monitoring result.   
   
   
       2 . The electronic apparatus of  claim 1 , being a global navigation satellite system (GNSS) receiver and further comprising a processing logic coupled to the reference clock source for performing a designated operation according to the reference clock. 
   
   
       3 . The electronic apparatus of  claim 1 , wherein the reference clock source is a temperature compensated oscillator. 
   
   
       4 . The electronic apparatus of  claim 1 , wherein the non-temperature factor is frequency of the reference clock. 
   
   
       5 . The electronic apparatus of  claim 1 , wherein the non-temperature factor is velocity or acceleration of the electronic apparatus. 
   
   
       6 . The electronic apparatus of  claim 1 , wherein the non-temperature factor is an operating state of the electronic apparatus. 
   
   
       7 . The electronic apparatus of  claim 1 , wherein the compensating circuit comprises a variable resistor coupled to a voltage regulator utilized for providing a supply voltage to the reference clock source, and the variable resistor controls the voltage regulator to adjust the supply voltage according to the monitoring result. 
   
   
       8 . The electronic apparatus of  claim 1 , wherein the compensating circuit comprises a variable load coupled to an output port of the reference clock source, and a load value of the variable load is adjusted according to the monitoring result. 
   
   
       9 . An electronic apparatus, comprising:
 a reference clock source, for generating a reference clock;   a processing logic, coupled to the reference clock source, for performing a designated operation according to the reference clock;   a monitoring circuit, for monitoring a non-temperature factor indicative of frequency drift occurrence of the reference clock to thereby generate a monitoring result; and   a compensating circuit, coupled to the processing logic and the monitoring circuit, for compensating the designated operation according to the monitoring result.   
   
   
       10 . The electronic apparatus of  claim 9 , wherein the reference clock source is a temperature compensated oscillator. 
   
   
       11 . The electronic apparatus of  claim 9 , being a global navigation satellite system (GNSS) receiver. 
   
   
       12 . The electronic apparatus of  claim 11 , wherein the processing logic comprises:
 a down-converter, for down-converting an input signal associated with a satellite signal received by the GNSS receiver according to an oscillating signal; and   a controllable oscillator, coupled to the down-converter, for providing the oscillating signal, wherein the controllable oscillator adjusts an oscillating frequency of the oscillating signal according to the monitoring result.   
   
   
       13 . The electronic apparatus of  claim 11 , wherein the processing logic is operated under the reference clock, and is utilized for receiving an input signal associated with a satellite signal received by the GNSS receiver, processing the input signal to generate a processing result, and then adjusting the processing result according to the monitoring result. 
   
   
       14 . A method of compensating an electronic apparatus, the electronic apparatus having a reference clock source for generating a reference clock, the method comprising:
 monitoring a non-temperature factor indicative of frequency drift occurrence of the reference clock to thereby generate a monitoring result; and   compensating the reference clock according to the monitoring result.   
   
   
       15 . The method of  claim 14 , wherein the electronic apparatus is a global navigation satellite system (GNSS) receiver and further includes a processing logic coupled to the reference clock source for performing a designated operation according to the reference clock. 
   
   
       16 . The method of  claim 14 , wherein the non-temperature factor is frequency of the reference clock. 
   
   
       17 . The method of  claim 14 , wherein the non-temperature factor is velocity or acceleration of the electronic apparatus. 
   
   
       18 . The method of  claim 14 , wherein the non-temperature factor is an operating state of the electronic apparatus. 
   
   
       19 . The method of  claim 14 , wherein compensating the reference clock according to the monitoring result comprises:
 adjusting a supply voltage provided to the reference clock source according to the monitoring result.   
   
   
       20 . The method of  claim 14 , wherein compensating the reference clock according to the monitoring result comprises:
 adjusting a load coupled to an output port of the reference clock source according to the monitoring result.   
   
   
       21 . A method of compensating an electronic apparatus, the electronic apparatus includes a reference clock source for generating a reference clock and a processing logic coupled to the reference clock source for performing a designated operation according to the reference clock, the method comprising:
 monitoring a non-temperature factor indicative of frequency drift occurrence of the reference clock to thereby generate a monitoring result; and   compensating the designated operation according to the monitoring result.   
   
   
       22 . The method of  claim 21 , wherein the electronic apparatus is a global navigation satellite system (GNSS) receiver. 
   
   
       23 . The method of  claim 22 , wherein the processing logic comprises a down-converter, for down-converting an input signal associated with a satellite signal received by the GNSS receiver according to an oscillating signal, and a controllable oscillator, coupled to the down-converter, for providing the oscillating signal; and compensating the designated operation according to the monitoring result comprises:
 adjusting an oscillating frequency of the oscillating signal according to the monitoring result.   
   
   
       24 . The method of  claim 22 , wherein the processing logic is operated under the reference clock, and is utilized for receiving an input signal associated with a satellite signal received by the GNSS receiver, and processing the input signal to generate a processing result; and compensating the designated operation according to the monitoring result comprises:
 adjusting the processing result according to the monitoring result.