| US 7,541,878 B2 | ||
| Temperature compensated crystal oscillator | ||
| Moshe Haiut, Ramat-Gan (Israel) | ||
| Assigned to Intel Corporation, Santa Clara, Calif. (US) | ||
| Filed on Dec. 29, 2005, as Appl. No. 11/323,822. | ||
| Prior Publication US 2007/0155341 A1, Jul. 05, 2007 | ||
| Int. Cl. H03L 7/00 (2006.01) | ||
| U.S. Cl. 331—2 [331/158; 331/116 R; 331/116 FE; 331/18; 331/20] | 21 Claims |
| 1. An apparatus, comprising:
a first oscillator made from piezoelectric material to oscillate at a first frequency for wireless communications;
a second oscillator to oscillate at a second frequency;
a comparator to compare the first frequency to the second frequency;
a controller to change the first frequency in response to the comparing of the first frequency to the second frequency;
a processor to execute an algorithm to generate a compensation value based upon comparing the first frequency to the second
frequency;
a feedback loop to communicably couple the first oscillator to the processor, the feedback loop to carry the compensation
value from the processor to the first oscillator, wherein the first frequency is changed in response to generating the compensation
value;
a register communicably coupled to the feedback loop, the register to store the compensation value; and
an open-loop feedback circuit communicably coupled to the piezoelectric material and the register to deliver the compensation
value from the register to the piezoelectric material.
|