Oscillators – Frequency stabilization – Temperature or current responsive means in circuit
Patent
1998-01-14
1999-11-16
Kinkead, Arnold
Oscillators
Frequency stabilization
Temperature or current responsive means in circuit
331158, 331177V, H03L 102
Patent
active
059865156
ABSTRACT:
A temperature compensated crystal oscillator comprises a crystal oscillating circuit having an AT-cut crystal resonator; a linearizing correction circuit for transforming a temperature characteristic curve of an oscillating frequency of the crystal resonator into a straight line using a fixed coefficient common to all crystal resonators; a gradient correction circuit for eliminating the gradient of the linearized temperature characteristic of the oscillating frequency usmg a variable coefficient depending on the type of crystal resonator; and an f0 adjustment circuit for adjusting the gradient corrected temperature characteristic of the oscillating frequency so as to cause the oscillating frequency to lie within an allowable range. Thus, upon the temperature compensation of the oscillating frequency, there are separately performed the linearizing correction, the gradient correction and the f0 adjustment, to achieve a fast temperature compensation adjustment of the oscillating frequency.
REFERENCES:
patent: 5757244 (1998-05-01), Nonaka et al.
1996 IEEE International Frequency Control Symposium; Analog TCXO Using One Chip LSI For Mobile Communication; Kuichi Kubo and Shuji Shibuya, pp. 728-734.
Citizen Watch Co. Ltd.
Kinkead Arnold
LandOfFree
Temperature compensation crystal oscillator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Temperature compensation crystal oscillator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Temperature compensation crystal oscillator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1329407