JPH03220805A - Oscillation circuit with fast leading - Google Patents
Oscillation circuit with fast leadingInfo
- Publication number
- JPH03220805A JPH03220805A JP1371890A JP1371890A JPH03220805A JP H03220805 A JPH03220805 A JP H03220805A JP 1371890 A JP1371890 A JP 1371890A JP 1371890 A JP1371890 A JP 1371890A JP H03220805 A JPH03220805 A JP H03220805A
- Authority
- JP
- Japan
- Prior art keywords
- oscillation circuit
- circuit
- oscillator
- oscillation
- coupling element
- 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
- 230000010355 oscillation Effects 0.000 title claims abstract description 38
- 230000008878 coupling Effects 0.000 abstract description 8
- 238000010168 coupling process Methods 0.000 abstract description 8
- 238000005859 coupling reaction Methods 0.000 abstract description 8
- 239000003990 capacitor Substances 0.000 abstract description 4
- 239000013078 crystal Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000010356 wave oscillation Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
この発明は発振の立ち上げを速くした発振回路に関する
。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an oscillation circuit that can quickly start up oscillation.
［従来技術］
ディジタル回路において電源の投入と同時に回路が動作
可能とならなければなら−ないシステムがしばしば必要
とされる。しかし、回路中にＱの高い発振子を用いた発
振回路が存在する場合、発振回路をｍ間約に立ちあげる
ことはきわめて困難である。そのため、従来は発振回路
の出力にゲートを設け、発振回路が定常状態となるまで
のある一定の時間の後にゲートを開く回路を設ける必要
があった。[Prior Art] In digital circuits, there is often a need for a system in which the circuit must be ready for operation as soon as power is applied. However, if an oscillation circuit using a high-Q oscillator is present in the circuit, it is extremely difficult to start up the oscillation circuit within m intervals. Therefore, conventionally, it has been necessary to provide a gate at the output of the oscillation circuit and to provide a circuit that opens the gate after a certain period of time until the oscillation circuit reaches a steady state.
［発明が解決しようとする問題点］
従来の方式では発振器のＱが素子により一定ではないた
め定常状態に至るまでの時間が特定できず発振回路が定
常状態に至るまでにゲートが開いた場合にはシステムが
誤動作する可能性があった。[Problems to be solved by the invention] In the conventional method, since the Q of the oscillator is not constant depending on the element, it is not possible to determine the time until the steady state is reached, and if the gate is opened before the oscillation circuit reaches the steady state, could cause the system to malfunction.
また発振回路の定常状態に至るまでの時間そのものを短
くするためにＱの低い発振子を用いると発振回路の安定
性が低下しシステムに悪影響を与える可能性があった。Furthermore, if an oscillator with a low Q is used to shorten the time it takes for the oscillation circuit to reach a steady state, the stability of the oscillation circuit may be reduced and the system may be adversely affected.
この発明は、Ｑの高い発振子を用いた発振回路でも電源
の投入と同時に立ちあげることができ、ゲートや遅延回
路を必要としない発振回路を得ることを目的とする。An object of the present invention is to obtain an oscillation circuit that can be started up at the same time as power is turned on even when using a high-Q oscillator, and that does not require gates or delay circuits.
［問題点を解決するための手段］
第１図に示すように、発振している発振回路をコンデン
サ、水晶振動子及び同様なＩ！ｌ能を有する結合素子で
目的の発振回路と結合する。[Means for solving the problem] As shown in FIG. 1, an oscillating circuit is connected to a capacitor, a crystal resonator, or a similar I! It is coupled to the target oscillation circuit using a coupling element with 1 function.
［作用］
通常、単独の発振回路は電源が入ると静止状態から徐り
に振幅が大きくなり発振状態に移行する。[Function] Normally, when a single oscillation circuit is powered on, the amplitude gradually increases from a resting state to an oscillating state.
また完全に静止した状態から振動状態に移るために通常
はノイズによる振動を種としてそれを増幅器によって増
幅することにより徐々に発振を開始する。ところが第）
図に示すそれぞれの発振回路は、あ４かしめ発振してい
る補助発振回路と結合されているため発振に必要なエネ
ルギーの供給を受けることかて゛きるため、それぞれの
発振回路は電源の投入と同時に定常状態となる。In addition, in order to transition from a completely stationary state to a vibrating state, oscillation is normally started gradually by using vibrations caused by noise as seeds and amplifying them with an amplifier. However, the second)
Each of the oscillation circuits shown in the figure is connected to an auxiliary oscillation circuit that performs oscillation, so it can receive the energy necessary for oscillation. state.
［実施例ｊ
この発明の実施酬を図面に基ついて説明すると、第２図
において、ｌで示す部分は低消費電力型の正弦波発振回
路で、２で示す結合素子を介して３て示すシステムに必
要なりロック発振回路に結合されている。[Embodiment j] To explain the implementation of this invention based on the drawings, in Fig. 2, the part indicated by l is a low power consumption type sine wave oscillation circuit, and the system indicated by 3 is connected via a coupling element indicated by 2. It is required to be coupled to a lock oscillator circuit.
それぞれの発振回路は同じ発振周波数をもつ発振子を持
っており同じ周波数で発振する。Each oscillation circuit has an oscillator with the same oscillation frequency and oscillates at the same frequency.
結合素子は、３に示す発振回路が停止している場合にも
ｌに示す発振回路か停止しないだけの十分に大きいイン
ピーダンスを持ち、しかも３に示す発振回路が立ち上か
る際に十分なエネルギーを供給できるインピーダンスを
持つコンデンサ等を使用する。The coupling element has a sufficiently large impedance so that the oscillation circuit shown in 1 does not stop even when the oscillation circuit shown in 3 is stopped, and has sufficient energy when the oscillation circuit shown in 3 starts up. Use a capacitor, etc. that has the impedance that can be supplied.
この回路においてＬに示す発Ｊ＆回路は常時電池等によ
ってあらかじめ発振させておくと、システムが起動する
際に直ちにクロックパルスをシステムに供給できる。In this circuit, if the oscillator J& circuit indicated by L is always oscillated by a battery or the like in advance, clock pulses can be immediately supplied to the system when the system is started up.
Ｅ発明の効果］
この発明は以上説明したように、高いＱの発振子をもつ
発振回路をＩｉ１間的に立ちあけることが特に容易であ
る。E Effects of the Invention] As explained above, in the present invention, it is particularly easy to open an oscillation circuit having a high Q oscillator between Ii1.
第１図はこの発明を説明するためのブロック図、第２図
はこの発明の一実施回路構成図である。
１ ・正弦波発振回路、２ ・・結合素子、３ ・
クロック発振回路FIG. 1 is a block diagram for explaining the present invention, and FIG. 2 is a circuit configuration diagram for implementing the present invention. 1. Sine wave oscillation circuit, 2. Coupling element, 3.
clock oscillation circuit
Claims (1)
振回路を発振状態にしておくことによって目的の発振回
路を電源投入後直ちに立ち上げる発振回路。An oscillation circuit that connects multiple oscillation circuits and keeps some of them in oscillation state to start up the desired oscillation circuit immediately after power is turned on.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1371890A JPH03220805A (en) | 1990-01-25 | 1990-01-25 | Oscillation circuit with fast leading |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1371890A JPH03220805A (en) | 1990-01-25 | 1990-01-25 | Oscillation circuit with fast leading |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03220805A true JPH03220805A (en) | 1991-09-30 |
Family
ID=11841029
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1371890A Pending JPH03220805A (en) | 1990-01-25 | 1990-01-25 | Oscillation circuit with fast leading |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03220805A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001512634A (en) * | 1997-01-16 | 2001-08-21 | シュレフリング．ウンド．アパラテボー．ゲゼルシャフト．ミット．ベシュレンクテル．ハフツング | Systems of contactless transmission of electrical energy or electrical signals |
-
1990
- 1990-01-25 JP JP1371890A patent/JPH03220805A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001512634A (en) * | 1997-01-16 | 2001-08-21 | シュレフリング．ウンド．アパラテボー．ゲゼルシャフト．ミット．ベシュレンクテル．ハフツング | Systems of contactless transmission of electrical energy or electrical signals |
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