JPH0186708U - - Google Patents
Info
- Publication number
- JPH0186708U JPH0186708U JP18247887U JP18247887U JPH0186708U JP H0186708 U JPH0186708 U JP H0186708U JP 18247887 U JP18247887 U JP 18247887U JP 18247887 U JP18247887 U JP 18247887U JP H0186708 U JPH0186708 U JP H0186708U
- Authority
- JP
- Japan
- Prior art keywords
- output
- inputs
- voltage
- oscillator
- crystal oscillator
- 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
- 239000013078 crystal Substances 0.000 claims description 7
- 230000010355 oscillation Effects 0.000 claims description 4
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Oscillators With Electromechanical Resonators (AREA)
Description
第１図はこの考案の一実施例を示す構成図、第
２図は従来の高安定水晶発振器の構成図、第３図
は電圧制御型水晶発振器の制御電圧／発振周波数
特性を示す図、第４図は比較回路の入力カウンタ
周波数／出力電圧特性を示す図である。図中、１
は電圧制御型水晶発振器、２は周波数分配器、３
は発振出力端子、４はカウンタ、５はメモリ、６
は比較回路、７は電圧増幅器、８は水晶発振器、
９は恒温槽、１０は恒温槽温度制御回路である。
なお、図中同一あるいは相当部分には同一符号を
付して示してある。
Fig. 1 is a block diagram showing an embodiment of this invention, Fig. 2 is a block diagram of a conventional highly stable crystal oscillator, Fig. 3 is a diagram showing control voltage/oscillation frequency characteristics of a voltage-controlled crystal oscillator, FIG. 4 is a diagram showing the input counter frequency/output voltage characteristics of the comparison circuit. In the figure, 1
is a voltage-controlled crystal oscillator, 2 is a frequency divider, 3 is a voltage-controlled crystal oscillator,
is an oscillation output terminal, 4 is a counter, 5 is a memory, 6
is a comparison circuit, 7 is a voltage amplifier, 8 is a crystal oscillator,
9 is a constant temperature bath; 10 is a constant temperature bath temperature control circuit.
It should be noted that the same or corresponding parts in the drawings are designated by the same reference numerals.
Claims (1)
波数を分配する周波数分配器と、前記分配出力を
出力する発振出力端子と、上記分配出力を入力す
るカウンタと、希望する発振周波数を記録するメ
モリと、上記カウンタの出力と前記メモリの出力
を入力する比較回路と、前記比較回路の出力を入
力し上記発振器に制御電圧を出力する電圧増幅器
とを備えたことを特徴とする水晶発振器。 a voltage-controlled crystal oscillator, a frequency divider that distributes the output frequency of the oscillator, an oscillation output terminal that outputs the distributed output, a counter that inputs the distributed output, and a memory that records a desired oscillation frequency; A crystal oscillator comprising: a comparison circuit that inputs the output of the counter and the output of the memory; and a voltage amplifier that inputs the output of the comparison circuit and outputs a control voltage to the oscillator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18247887U JPH0186708U (en) | 1987-11-30 | 1987-11-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18247887U JPH0186708U (en) | 1987-11-30 | 1987-11-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0186708U true JPH0186708U (en) | 1989-06-08 |
Family
ID=31473926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18247887U Pending JPH0186708U (en) | 1987-11-30 | 1987-11-30 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0186708U (en) |
-
1987
- 1987-11-30 JP JP18247887U patent/JPH0186708U/ja active Pending
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