| US 7,573,345 B2 | ||
| Temperature compensated oven controlled crystal oscillator | ||
| Nigel David Hardy, Stansted (United Kingdom); and Karl Robert Ward, Sawston (United Kingdom) | ||
| Assigned to Rakon UK Limited, Somerset (United Kingdom) | ||
| Appl. No. 11/632,239 PCT Filed Jul. 12, 2005, PCT No. PCT/IB2005/001981 § 371(c)(1), (2), (4) Date Jan. 11, 2007, PCT Pub. No. WO2006/008620, PCT Pub. Date Jan. 26, 2006. |
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| Application 11/632239 is a continuation of application No. 10/891501, filed on Jul. 15, 2004, granted, now 7,253,694. | ||
| Prior Publication US 2007/0268079 A1, Nov. 22, 2007 | ||
| Int. Cl. H03B 5/32 (2006.01) | ||
| U.S. Cl. 331—158 [331/176; 331/116 R; 331/116 FE] | 17 Claims |
| 1. A method of compensating for temperature-dependent behavior of a tunable circuit, the method comprising:
providing a temperature controlled frequency source, the temperature of which is controlled, in use, such that a variation
in temperature of the frequency source is less than a corresponding variation in ambient temperature; and
reducing the effects of variations of an ambient temperature on an operating frequency of the temperature controlled frequency
source by compensating the temperature controlled frequency source on the basis of correction data derived during a temperature
sweep, said temperature sweep including varying the ambient temperature and activating temperature control of the temperature
controlled frequency source.
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