JPH0267805A - Oscillating circuit - Google Patents
Oscillating circuitInfo
- Publication number
- JPH0267805A JPH0267805A JP22016888A JP22016888A JPH0267805A JP H0267805 A JPH0267805 A JP H0267805A JP 22016888 A JP22016888 A JP 22016888A JP 22016888 A JP22016888 A JP 22016888A JP H0267805 A JPH0267805 A JP H0267805A
- Authority
- JP
- Japan
- Prior art keywords
- battery voltage
- circuit
- voltage
- battery
- inverting amplifier
- 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
- 238000001514 detection method Methods 0.000 claims abstract description 18
- 230000010355 oscillation Effects 0.000 claims description 18
- 239000003990 capacitor Substances 0.000 claims description 10
- 230000007423 decrease Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 101100119059 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) ERG25 gene Proteins 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は発振回路に関し、特に相補型ＭＯＳＦＥＴで構
成される発振回路に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an oscillation circuit, and more particularly to an oscillation circuit configured with complementary MOSFETs.
従来、この種の発振回路は、電子時計等に使用しなとき
電池電圧が低下した場合、電池電圧検出回路にて電池電
圧レベルを検出し、表示で外部に報知していた。Conventionally, when this type of oscillation circuit is not used in an electronic watch or the like and the battery voltage drops, the battery voltage detection circuit detects the battery voltage level and notifies the outside via a display.
上述した従来の発振回路は、電池電圧検出回路で電池電
圧低下を検出し外部に表示にて報知しても、表示を見落
とす場合がある。電子時計等によっては、記憶回路に記
憶された情報を電池交換時に一定時間消去させない構成
をしているものの、電池電圧低下を報知する表示を見落
とし放置された場合、記憶回路に記憶された情報が消去
されてしまうという欠点がある。In the conventional oscillation circuit described above, even if the battery voltage detection circuit detects a decrease in battery voltage and notifies the user via a display externally, the display may be overlooked. Some electronic watches are configured so that the information stored in the memory circuit is not erased for a certain period of time when the battery is replaced, but if the display notifying the battery voltage drop is overlooked and left unattended, the information stored in the memory circuit may be erased. The disadvantage is that it is erased.
本発明の目的は、電池電圧が低下した場合、発振回路の
動作を停止することにより、電池電圧を低下させず回路
の内部状態を維持し、記憶回路に記憶された情報が消去
されることを防止できる発振回路を提供することにある
。An object of the present invention is to maintain the internal state of the circuit without lowering the battery voltage by stopping the operation of the oscillation circuit when the battery voltage decreases, and to prevent information stored in the memory circuit from being erased. An object of the present invention is to provide an oscillation circuit that can prevent the above problems.
本発明の発振回路は、相補型ＭＯ３ＦＥＴからなる反転
増幅器と、該反転増幅器の入力端と出力端との間に接続
された発振素子と、前記反転増幅器の入力端及び出力端
と電源端子間にそれぞれ接続される第１及び第２のコン
デンサと、電池電圧を検出する電池電圧検出回路とを備
える発振回路において、前記電池電圧検出回路の出力信
号により制御される前記第１のコンデンサに並列に接続
されるＭＯＳＦＥＴからなるアナログスイッチと、前記
反転増幅器の入力端と出力端に接続されるバイアス抵抗
としてのＭＯＳＦＥＴからなるアナログスイッチとを含
んで構成される。The oscillation circuit of the present invention includes an inverting amplifier made of complementary MO3FETs, an oscillation element connected between the input end and the output end of the inverting amplifier, and a power supply terminal connected between the input end and the output end of the inverting amplifier and the power supply terminal. In an oscillation circuit comprising first and second capacitors connected to each other and a battery voltage detection circuit for detecting battery voltage, connected in parallel to the first capacitor controlled by an output signal of the battery voltage detection circuit. and an analog switch consisting of a MOSFET as a bias resistor connected to the input terminal and output terminal of the inverting amplifier.
本発明によれば、電子時計等に使用されている電池の電
圧が減少してきた場合、ある設定電圧を電池電圧検出回
路にて検出し、反転増幅器の入力側に接続されるＭＯＳ
Ｆ ＥＴからなるアナログスイッチのゲートと反転増
幅器のバイアス抵抗に使用されるＭＯＳ Ｆ ＥＴから
なるアナログスイッチのゲートに電池電圧検出回路から
制御信号を印加し、反転増幅器の入力を電源電圧と同電
圧に維持し、更に、バイアス抵抗を切断することにより
、バイアス抵抗に電流を流すことなく発振回路を停止し
て回路動作を停止し、電池電圧を低下させず回路の内部
状態を維持し、記憶回路に記憶された情報が消去される
ことを防止できる。According to the present invention, when the voltage of a battery used in an electronic watch or the like decreases, a certain set voltage is detected by a battery voltage detection circuit, and a MOS connected to the input side of an inverting amplifier is detected.
A control signal is applied from the battery voltage detection circuit to the gate of the analog switch consisting of FET and the gate of the analog switch consisting of MOS FET used for the bias resistance of the inverting amplifier, and the input of the inverting amplifier is set to the same voltage as the power supply voltage. Furthermore, by disconnecting the bias resistor, the oscillation circuit is stopped and the circuit operation is stopped without current flowing through the bias resistor, and the internal state of the circuit is maintained without lowering the battery voltage. It is possible to prevent stored information from being erased.
次に、本発明の実施例を図面を参照して説明する。 Next, embodiments of the present invention will be described with reference to the drawings.
第１図は本発明の一実施例の回路図である。FIG. 1 is a circuit diagram of an embodiment of the present invention.
第１図に示すように、本実施例は、発振素子１の一端を
反転増幅器１１のＰチャネル型のＭＯＳＦＥＴ２とＮチ
ャネル型のＭＯＳＦＥＴ３のゲートとバイアス抵抗に使
用するＰチャネル型のＭＯＳＦＥＴ４とＮチャネル型の
ＭＯＳＦＥＴ５のソースと第１のコンデンサ８の一端と
コンデンサ８に並列に接続されたＰチャネル型のＭＯＳ
ＦＥＴ６のドレインに接続し、コンデンサ８の他端とＭ
ＯＳＦＥＴ６のソースはＶｌ）Ｄ電源の電源端子に接続
し、反転増幅器１１のＭＯＳＦＥＴ２のソースはＶＤＤ
電源の電源端子に接続し、ドレインはＭＯＳＦＥＴ３の
トレインとバイアス抵抗に使用するＭＯＳＦＥＴ４と５
のドレインと第２のコンデンサ７の一端と発振素子１の
他端に接続し、ＭＯＳＦＥＴ３のソースはＶｓｓ電源の
電源端子に接続し、コンデンサ７の他端はＶＤＤ電源の
電源端子に接続する。ＭＯＳＦＥＴ４のゲートはインバ
ータ１０の出力に接続し、インバータ１０の入力とＭＯ
ＳＦＥＴ５．６のゲートは電池電圧検出回路９の出力端
子０に接続し、電池電圧検出回路９の入力端子■ｓｓは
電池１２のマイナス側に接続し、電池１２のプラス側は
ＶＤＤ電源の電源端子に接続する。As shown in FIG. 1, in this embodiment, one end of the oscillation element 1 is used as the gate and bias resistor of P-channel MOSFET 2 and N-channel MOSFET 3 of an inverting amplifier 11. A P-channel type MOS connected in parallel to the source of the type MOSFET 5, one end of the first capacitor 8, and the capacitor 8.
Connected to the drain of FET6, and connected to the other end of capacitor 8 and M
The source of OSFET6 is connected to the power supply terminal of the Vl)D power supply, and the source of MOSFET2 of the inverting amplifier 11 is connected to VDD.
Connected to the power supply terminal of the power supply, and the drain is connected to the train of MOSFET 3 and MOSFETs 4 and 5 used for bias resistance.
The drain of the MOSFET 3 is connected to one end of the second capacitor 7 and the other end of the oscillation element 1, the source of the MOSFET 3 is connected to the power terminal of the Vss power supply, and the other end of the capacitor 7 is connected to the power terminal of the VDD power supply. The gate of MOSFET4 is connected to the output of inverter 10, and the input of inverter 10 and MOSFET4 are connected to the output of inverter 10.
The gate of SFET 5.6 is connected to the output terminal 0 of the battery voltage detection circuit 9, the input terminal ■ss of the battery voltage detection circuit 9 is connected to the negative side of the battery 12, and the positive side of the battery 12 is connected to the power supply terminal of the VDD power supply. Connect to.
本実施例においては、反転増幅器１１の入力端に接続さ
れるＭＯＳＦＥＴ６と反転増幅器１１のバイアス抵抗に
使用されるＭＯ３Ｆ、ＥＴ４ ５のゲートに電池電圧検
出回路９の出力端子Ｏがらの制御信号を印加してＭＯＳ
ＦＥＴ６とＭＯＳＦＥＴ４，５とを制御している。In this embodiment, a control signal from the output terminal O of the battery voltage detection circuit 9 is applied to the MOSFET 6 connected to the input terminal of the inverting amplifier 11 and the gates of MO3F and ET4 5 used for the bias resistance of the inverting amplifier 11. and MOS
It controls FET 6 and MOSFETs 4 and 5.
電池電圧検出回路９は出力端子○から制御信号として通
常は高電圧レベルを出力してＭＯ３ＦＦ。The battery voltage detection circuit 9 normally outputs a high voltage level as a control signal from the output terminal ○ to MO3FF.
Ｔ６を非導通状態とし、更に、ＭＯＳＦＥＴ４゜５を導
通状態としてバイアス抵抗として使用している。T6 is made non-conductive, and MOSFET 4.5 is made conductive and used as a bias resistor.
電池電圧検出回路９は電池１２の電圧が検出電圧のレベ
ルまで低下しな時点で、出力端子○からの制御信号の電
位レベルを反転することにより、ＭＯＳＦＥＴ６を導通
状態とし、かつＭＯＳＦＥＴ４，５を非導通状態として
、反転増幅器１１の入力をＶｏｏｔ源の電圧と同電圧と
し、更に、バイアス抵抗を切断する。以上の動作により
、バイアス抵抗に電流を流すことなく発振回路を停止さ
せ電池電圧を維持することができる。The battery voltage detection circuit 9 turns the MOSFET 6 into a conductive state and turns the MOSFETs 4 and 5 into a non-conducting state by inverting the potential level of the control signal from the output terminal ○ when the voltage of the battery 12 does not fall to the detection voltage level. In the conductive state, the input of the inverting amplifier 11 is set to the same voltage as the voltage of the Voot source, and the bias resistor is further disconnected. With the above operation, the oscillation circuit can be stopped and the battery voltage can be maintained without flowing current through the bias resistor.
以上説明したように本発明は、電池電圧検出回路により
電池電圧の低下を検出したとき、電池電圧検出回路から
出力される制御信号により反転増幅器の入力を電源電圧
と同電圧とし、更に、バイアス抵抗を切断して、バイア
ス抵抗に電流を流すことなく発振回路を停止して回路動
作を停止することにより、電池電圧を低下させず回路の
内部状態を維持し、記憶回路に記憶された情報が消去さ
れることを防止できる効果がある。As explained above, in the present invention, when a decrease in battery voltage is detected by the battery voltage detection circuit, the input of the inverting amplifier is set to the same voltage as the power supply voltage by the control signal output from the battery voltage detection circuit, and furthermore, the bias resistance By disconnecting the oscillation circuit and stopping circuit operation without flowing current through the bias resistor, the internal state of the circuit is maintained without lowering the battery voltage, and the information stored in the memory circuit is erased. It has the effect of preventing this from happening.
第１図は本発明の一実施例の回路図である。
１・・・発振素子、２，４．６・・・Ｐチャネル型のＭ
ＯＳＦＥＴ、３．５・ Ｎチャネル型のＭＯＳＦＥＴ、
７，８・・・コンデンサ、９・・・電池電圧検出回路、
１０・・・インバータ、１１・・・反転増幅器、１２・
・・電池。
代理人 弁理士 内 原 晋
昂FIG. 1 is a circuit diagram of an embodiment of the present invention. 1... Oscillation element, 2, 4.6... P channel type M
OSFET, 3.5/N-channel MOSFET,
7, 8... Capacitor, 9... Battery voltage detection circuit,
10... Inverter, 11... Inverting amplifier, 12...
··battery. Agent: Susumuaki Uchihara, patent attorney
Claims (1)
器の入力端と出力端との間に接続された発振素子と、前
記反転増幅器の入力端及び出力端と電源端子間にそれぞ
れ接続される第１及び第２のコンデンサと、電池電圧を
検出する電池電圧検出回路とを備える発振回路において
、前記電池電圧検出回路の出力信号により制御される前
記第１のコンデンサに並列に接続されるＭＯＳＦＥＴか
らなるアナログスイッチと、前記反転増幅器の入力端と
出力端に接続されるバイアス抵抗としてのＭＯＳＦＥＴ
からなるアナログスイッチとを含むことを特徴とする発
振回路。an oscillation element connected between an input terminal and an output terminal of the inverting amplifier; In an oscillation circuit comprising a second capacitor and a battery voltage detection circuit for detecting battery voltage, an analog switch comprising a MOSFET connected in parallel to the first capacitor controlled by an output signal of the battery voltage detection circuit. and a MOSFET as a bias resistor connected to the input terminal and output terminal of the inverting amplifier.
An oscillation circuit comprising an analog switch consisting of:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22016888A JPH0267805A (en) | 1988-09-01 | 1988-09-01 | Oscillating circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22016888A JPH0267805A (en) | 1988-09-01 | 1988-09-01 | Oscillating circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0267805A true JPH0267805A (en) | 1990-03-07 |
Family
ID=16746951
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22016888A Pending JPH0267805A (en) | 1988-09-01 | 1988-09-01 | Oscillating circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0267805A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57101434A (en) * | 1980-12-16 | 1982-06-24 | Toshiba Corp | Oscillator |
| JPS5937628B2 (en) * | 1975-11-10 | 1984-09-11 | 三菱電機株式会社 | Shiyogatsuushinsouchi |
| JPS62132405A (en) * | 1985-12-04 | 1987-06-15 | Toshiba Corp | Crystal oscillation circuit |
-
1988
- 1988-09-01 JP JP22016888A patent/JPH0267805A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5937628B2 (en) * | 1975-11-10 | 1984-09-11 | 三菱電機株式会社 | Shiyogatsuushinsouchi |
| JPS57101434A (en) * | 1980-12-16 | 1982-06-24 | Toshiba Corp | Oscillator |
| JPS62132405A (en) * | 1985-12-04 | 1987-06-15 | Toshiba Corp | Crystal oscillation circuit |
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