JPS63187412U - - Google Patents
Info
- Publication number
- JPS63187412U JPS63187412U JP7780287U JP7780287U JPS63187412U JP S63187412 U JPS63187412 U JP S63187412U JP 7780287 U JP7780287 U JP 7780287U JP 7780287 U JP7780287 U JP 7780287U JP S63187412 U JPS63187412 U JP S63187412U
- Authority
- JP
- Japan
- Prior art keywords
- oscillation
- main
- circuit
- auxiliary
- crystal
- 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)
Description
第１図はこの考案の一実施例の構成を示すブロ
ツク図、第２図は同実施例の具体的構成を示す回
路図、第３図は同実施例の動作を説明するための
タイミングチヤート、第４図は従来の水晶発振回
路の一般的な構成を示すブロツク図、第５図イお
よびロは第４図に示す水晶発振回路び具体的構成
を示す回路図、第６図イは水晶振動子のインピー
ダンス特性を示すグラフ、第６図ロは水晶振動子
の等価回路を示す回路図、第６図ハは水晶振動子
の等価直列抵抗と励振レベルの関係を示すグラフ
、第７図イ，ロおよび第８図は起動特性の改善を
図つた従来の水晶発振回路の構成を示す回路図、
第９図は従来の水晶発振回路の動作を示すタイミ
ングチヤートである。
１……補助発振回路（補助発振手段）、２……
増幅回路、３……帰還回路、５……アナログスイ
ツチ、７……主発振回路（主発振手段）、８……
増幅回路、９……帰還回路、１０……制御回路（
制御手段）、１７……時定数回路、２１……水晶
振動子、Ｒ６……抵抗、Ｃ４……コンデンサ。
FIG. 1 is a block diagram showing the configuration of an embodiment of the invention, FIG. 2 is a circuit diagram showing the specific configuration of the embodiment, and FIG. 3 is a timing chart for explaining the operation of the embodiment. Figure 4 is a block diagram showing the general configuration of a conventional crystal oscillation circuit, Figure 5 A and B are circuit diagrams showing the specific configuration of the crystal oscillation circuit shown in Figure 4, and Figure 6 A is a crystal oscillation circuit. Figure 6 (b) is a circuit diagram showing the equivalent circuit of the crystal resonator, Figure 6 (c) is a graph showing the relationship between the equivalent series resistance of the crystal resonator and the excitation level, and Figure 7 (a) is a graph showing the impedance characteristics of the crystal resonator. Figures 8 and 8 are circuit diagrams showing the configuration of a conventional crystal oscillation circuit designed to improve startup characteristics;
FIG. 9 is a timing chart showing the operation of a conventional crystal oscillation circuit. 1...Auxiliary oscillation circuit (auxiliary oscillation means), 2...
Amplifier circuit, 3... Feedback circuit, 5... Analog switch, 7... Main oscillation circuit (main oscillation means), 8...
Amplifier circuit, 9...Feedback circuit, 10...Control circuit (
control means), 17...time constant circuit, 21...crystal oscillator, R6 ...resistor, C4 ...capacitor.
Claims (1)
段と、水晶振動子を有する主発振手段と、電源投
入時に前記補助発振手段の発振出力を前記主発振
手段に入力して該主発振手段を起動し、その後、
前記主発振手段の発振動作が定常状態となつた時
点で該主発振手段から得られる発振出力に基づい
て前記補助発振手段の発振動作を停止させる制御
手段とを具備することを特徴とする水晶発振回路
。 (2) 前記補助発振手段の発振周波数を、前記主
発振手段の発振周波数と略等しくしたことを特徴
とする実用新案登録請求の範囲第１項記載の水晶
発振回路。[Claims for Utility Model Registration] (1) An auxiliary oscillation means for starting without a crystal oscillator, a main oscillation means having a crystal oscillator, and an oscillation output of the auxiliary oscillation means when the power is turned on. input to start the main oscillation means, and then,
Crystal oscillation characterized by comprising: a control means for stopping the oscillation operation of the auxiliary oscillation means based on the oscillation output obtained from the main oscillation means when the oscillation operation of the main oscillation means reaches a steady state. circuit. (2) The crystal oscillation circuit according to claim 1, wherein the oscillation frequency of the auxiliary oscillation means is approximately equal to the oscillation frequency of the main oscillation means.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7780287U JPS63187412U (en) | 1987-05-22 | 1987-05-22 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7780287U JPS63187412U (en) | 1987-05-22 | 1987-05-22 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63187412U true JPS63187412U (en) | 1988-11-30 |
Family
ID=30926153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7780287U Pending JPS63187412U (en) | 1987-05-22 | 1987-05-22 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63187412U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006119029A (en) * | 2004-10-22 | 2006-05-11 | Denso Corp | Charge amplifying circuit |
| JP2010147758A (en) * | 2008-12-18 | 2010-07-01 | Panasonic Corp | Oscillation circuit |
| JP2013009032A (en) * | 2011-06-22 | 2013-01-10 | Mitsumi Electric Co Ltd | Oscillation circuit |
| EP3311491A1 (en) * | 2015-06-22 | 2018-04-25 | Microchip Technology Incorporated | Periodic kickstarter for a crystal oscillator |
-
1987
- 1987-05-22 JP JP7780287U patent/JPS63187412U/ja active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006119029A (en) * | 2004-10-22 | 2006-05-11 | Denso Corp | Charge amplifying circuit |
| JP4534714B2 (en) * | 2004-10-22 | 2010-09-01 | 株式会社デンソー | Charge amplifier circuit |
| JP2010147758A (en) * | 2008-12-18 | 2010-07-01 | Panasonic Corp | Oscillation circuit |
| EP2369737A1 (en) * | 2008-12-18 | 2011-09-28 | Panasonic Corporation | Oscillation circuit |
| US8413523B2 (en) | 2008-12-18 | 2013-04-09 | Panasonic Corporation | Oscillation circuit |
| EP2369737A4 (en) * | 2008-12-18 | 2017-05-10 | Panasonic Corporation | Oscillation circuit |
| JP2013009032A (en) * | 2011-06-22 | 2013-01-10 | Mitsumi Electric Co Ltd | Oscillation circuit |
| EP3311491A1 (en) * | 2015-06-22 | 2018-04-25 | Microchip Technology Incorporated | Periodic kickstarter for a crystal oscillator |
| JP2018518901A (en) * | 2015-06-22 | 2018-07-12 | マイクロチップ テクノロジー インコーポレイテッドＭｉｃｒｏｃｈｉｐ Ｔｅｃｈｎｏｌｏｇｙ Ｉｎｃｏｒｐｏｒａｔｅｄ | Periodic kickstarter for crystal oscillator |
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