JPS6481507A - Digital temperature compensation crystal oscillator - Google Patents
Digital temperature compensation crystal oscillatorInfo
- Publication number
- JPS6481507A JPS6481507A JP23948087A JP23948087A JPS6481507A JP S6481507 A JPS6481507 A JP S6481507A JP 23948087 A JP23948087 A JP 23948087A JP 23948087 A JP23948087 A JP 23948087A JP S6481507 A JPS6481507 A JP S6481507A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- section
- signal
- crystal vibrator
- temperature compensation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Oscillators With Electromechanical Resonators (AREA)
Abstract
PURPOSE:To simplify the compensation circuit by generating a coefficient of a deviation correction signal of linear approximation from a variable amplifier in a frequency temperature compensation means of a crystal vibrator using a model temperature compensation signal and a deviation compensation signal due to cut-angle error of the crystal vibrator. CONSTITUTION:A temperature information signal detected by a temperature detection section 11 is converted into a digital signal by an A/D conversion section 12 and inputted to a storage section 13. The storage section 13 reads the data of a temperature compensation signal corresponding to said temperature information signal from a ROM storing an average model temperature compensation signal of a frequency temperature characteristic of the crystal vibrator, converts the data into an analog signal again by a D/A conversion section 14 and gives the result to a variable amplifier 15 as a linear coefficient generation section. The amplifier 15 generates a coefficient in approximating the deviation between the model temperature characteristic of the storage section 13 and the frequency temperature characteristic of the individual crystal vibrator in terms of linear function, gives the result to the varactor diode of the voltage controlled crystal oscillation section 16 to compensate the temperature characteristic of the crystal vibrator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23948087A JPS6481507A (en) | 1987-09-24 | 1987-09-24 | Digital temperature compensation crystal oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23948087A JPS6481507A (en) | 1987-09-24 | 1987-09-24 | Digital temperature compensation crystal oscillator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6481507A true JPS6481507A (en) | 1989-03-27 |
Family
ID=17045401
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23948087A Pending JPS6481507A (en) | 1987-09-24 | 1987-09-24 | Digital temperature compensation crystal oscillator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6481507A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5102471A (en) * | 1990-03-02 | 1992-04-07 | Mitutoyo Corporation | Portable measuring instrument with solar batteries |
| DE102011081525A1 (en) | 2010-08-25 | 2012-03-01 | Mitutoyo Corporation | measuring device |
-
1987
- 1987-09-24 JP JP23948087A patent/JPS6481507A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5102471A (en) * | 1990-03-02 | 1992-04-07 | Mitutoyo Corporation | Portable measuring instrument with solar batteries |
| DE102011081525A1 (en) | 2010-08-25 | 2012-03-01 | Mitutoyo Corporation | measuring device |
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