JPH0195639U - - Google Patents
Info
- Publication number
- JPH0195639U JPH0195639U JP19165287U JP19165287U JPH0195639U JP H0195639 U JPH0195639 U JP H0195639U JP 19165287 U JP19165287 U JP 19165287U JP 19165287 U JP19165287 U JP 19165287U JP H0195639 U JPH0195639 U JP H0195639U
- Authority
- JP
- Japan
- Prior art keywords
- output
- pulse width
- oscillator
- width modulator
- frequency
- 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.)
- Granted
Links
- 239000013078 crystal Substances 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 5
Landscapes
- Piezo-Electric Or Mechanical Vibrators, Or Delay Or Filter Circuits (AREA)
Description
第１図は本考案の一実施例を示すブロツク構成
図、第２図はパルス幅変調器におけるパルス幅変
調の前後と温度変化に基づくパルス幅の変化を示
す図、第３図は従来の周波数調整の一実施例を示
す説明図、第４図は温度と共振周波数の関係を示
す図である。
１……発振器、２……パルス幅変調器、３……
カウンタ、４……基準クロツク、１０……水晶振
動子。
Fig. 1 is a block configuration diagram showing an embodiment of the present invention, Fig. 2 is a diagram showing before and after pulse width modulation in a pulse width modulator and changes in pulse width based on temperature changes, and Fig. 3 is a diagram showing a conventional frequency FIG. 4, an explanatory diagram showing one example of adjustment, is a diagram showing the relationship between temperature and resonance frequency. 1... Oscillator, 2... Pulse width modulator, 3...
Counter, 4...Reference clock, 10...Crystal oscillator.
Claims (1)
晶振動子と、前記発振器からの周波数出力を入力
し基準設定電圧の出力に基づいてその周波数のデ
ユーテイ比を変化させるパルス幅変調器と、前記
パルス幅変調器からの出力をカウントするカウン
タを備えたことを特徴とする水晶温度計。 a crystal resonator that is combined with an oscillator and vibrates at a resonant frequency; a pulse width modulator that receives a frequency output from the oscillator and changes the duty ratio of the frequency based on the output of a reference setting voltage; and the pulse width modulator. A crystal thermometer characterized by being equipped with a counter that counts the output from the thermometer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19165287U JPH0535301Y2 (en) | 1987-12-17 | 1987-12-17 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19165287U JPH0535301Y2 (en) | 1987-12-17 | 1987-12-17 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0195639U true JPH0195639U (en) | 1989-06-23 |
| JPH0535301Y2 JPH0535301Y2 (en) | 1993-09-08 |
Family
ID=31482554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19165287U Expired - Lifetime JPH0535301Y2 (en) | 1987-12-17 | 1987-12-17 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0535301Y2 (en) |
-
1987
- 1987-12-17 JP JP19165287U patent/JPH0535301Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0535301Y2 (en) | 1993-09-08 |