Title:
【発明の名称】温度補償発振器回路
Document Type and Number:
Japanese Patent JPH08500220
Kind Code:
A
Abstract:
PCT No. PCT/NL93/00135 Sec. 371 Date May 23, 1995 Sec. 102(e) Date May 23, 1995 PCT Filed Jun. 29, 1993 PCT Pub. No. WO94/03980 PCT Pub. Date Feb. 17, 1994.A temperature compensated oscillator circuit includes an oscillator (1) which is controlled by a processor (8) . The output frequency (fx) of the oscillator (1) or an external reference frequency (fref) are used as reference signal in conjunction with a dual mode oscillator (9) which can be switched to provide temperature dependent fundamental (f1) and third (f3) harmonic frequencies. By the use of switches (S1, S2 S3), a divider (2) and first and second counters (3, 10) both calibration and temperature compensation of the oscillator (1) are carried out via the processor (8), using the substantially linear temperature dependence of the frequency difference between the third harmonic (f3) and three times the fundamental frequency (3f1).
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Inventors:
Post, Rainer Rulov
Kamp, Petrus Johannes Maria
Kamp, Petrus Johannes Maria
Application Number:
JP50519594A
Publication Date:
January 09, 1996
Filing Date:
June 29, 1993
Export Citation:
Assignee:
Sierra Semiconductor BV
International Classes:
H03L1/02; (IPC1-7): H03L1/02
Attorney, Agent or Firm:
Heiyoshi Odashima