EP 0482020 A4 19920930 - SELF-CALIBRATING TEMPERATURE-COMPENSATED FREQUENCY SOURCE
Title (en)
SELF-CALIBRATING TEMPERATURE-COMPENSATED FREQUENCY SOURCE
Publication
Application
Priority
- AU 5929090 A 19900622
- AU PJ486589 A 19890622
Abstract (en)
[origin: WO9016113A1] The present invention relates to control of a frequency source (1) in, for example, a remote unit in a mobile communications system, in order to maintain a stable frequency signal. In normal operation the frequency source (1) is frequency locked to an external frequency reference (10). A temperature detecting means (3) monitors temperature of the frequency source during frequency lock information relating to temperature is stored in storage means (7) together with information relating to control signals (6) applied to the frequency source (1) to maintain frequency lock for the various temperatures, under control of a control means (4). In the absence of the frequency reference (10), temperature of the frequency source (1) is detected and the stored information is used to generate a control signal (6) to control the output frequency of the frequency source (1) in accordance with the detected temperature.
IPC 1-7
IPC 8 full level
H03L 1/02 (2006.01)
CPC (source: EP)
H03L 1/026 (2013.01)
Citation (search report)
- [X] GB 2132042 A 19840627 - BRITISH BROADCASTING CORP
- See references of WO 9016113A1
Designated contracting state (EPC)
AT BE DE DK FR GB IT LU NL SE
DOCDB simple family (publication)
WO 9016113 A1 19901227; EP 0482020 A1 19920429; EP 0482020 A4 19920930
DOCDB simple family (application)
AU 9000269 W 19900622; EP 90909573 A 19900622