JPH08321797A - Power supply circuit - Google Patents
Power supply circuitInfo
- Publication number
- JPH08321797A JPH08321797A JP7127794A JP12779495A JPH08321797A JP H08321797 A JPH08321797 A JP H08321797A JP 7127794 A JP7127794 A JP 7127794A JP 12779495 A JP12779495 A JP 12779495A JP H08321797 A JPH08321797 A JP H08321797A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- power supply
- electromotive force
- resonance
- induced electromotive
- 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
- 239000003990 capacitor Substances 0.000 claims abstract description 47
- 238000009499 grossing Methods 0.000 claims abstract description 20
- 230000005540 biological transmission Effects 0.000 abstract description 12
- 230000003321 amplification Effects 0.000 description 14
- 238000003199 nucleic acid amplification method Methods 0.000 description 14
- 238000010586 diagram Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 2
- 230000010355 oscillation Effects 0.000 description 2
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical group [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 229910052744 lithium Inorganic materials 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Rectifiers (AREA)
- Near-Field Transmission Systems (AREA)
- Circuits Of Receivers In General (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は電源供給回路に係り、特
にＬＣ共振回路に誘起した誘導起電力を整流することに
より電源とする電源供給回路に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply circuit, and more particularly to a power supply circuit which rectifies an induced electromotive force induced in an LC resonance circuit to serve as a power supply.
【０００２】[0002]
【従来の技術】従来より、無線通信によって患者等を検
出する患者等の検出装置や非接触開錠の電気錠があっ
た。このような患者等の検出装置や電気錠に使用される
ポケット型携帯送受信機（応答器）５０は図４に示すよ
うに、電源供給回路５１、復調回路５２、制御回路５
３、変調・増幅回路５４および送信アンテナ５５を備え
ている。また、電源供給回路５１は受信コイルＬ11およ
びコンデンサＣ11からなる受信アンテナ５６と、ダイオ
ードＤ11および平滑コンデンサＣ12からなる整流回路５
７とから構成されている。2. Description of the Related Art Conventionally, there have been detection devices for detecting patients and the like by wireless communication and electric locks for non-contact unlocking. As shown in FIG. 4, a pocket type portable transceiver (responder) 50 used for such a detection device for a patient or the like or an electric lock has a power supply circuit 51, a demodulation circuit 52, and a control circuit 5.
3, a modulation / amplification circuit 54 and a transmission antenna 55 are provided. The power supply circuit 51 includes a receiving antenna 56 including a receiving coil L 11 and a capacitor C 11, and a rectifying circuit 5 including a diode D 11 and a smoothing capacitor C 12.
7 and 7.
【０００３】本体送受信機（質問器）５８の送信アンテ
ナ５９から送信される微弱電波ＥＷを受信する受信アン
テナ５６は整流回路５７のダイオードＤ11のアノードに
接続され、このダイオードＤ11のカソードは平滑コンデ
ンサＣ12を介してアースに接続されている。また、受信
アンテナ５６、ダイオードＤ11間には復調回路５２の入
力側が接続され、復調回路５２の出力側は制御回路５３
の入力側に接続され、制御回路５３の出力側は変調・増
幅回路５４を介して送信アンテナ５５に接続されてい
る。The receiving antenna 56 for receiving the weak radio wave EW transmitted from the transmitting antenna 59 of the main body transceiver (interrogator) 58 is connected to the anode of the diode D 11 of the rectifier circuit 57, and the cathode of this diode D 11 is smooth. It is connected to ground via a capacitor C 12 . The input side of the demodulation circuit 52 is connected between the receiving antenna 56 and the diode D 11, and the output side of the demodulation circuit 52 is connected to the control circuit 53.
Of the control circuit 53, and the output side of the control circuit 53 is connected to the transmission antenna 55 via the modulation / amplification circuit 54.
【０００４】さらに、整流回路５７のダイオードＤ11と
平滑コンデンサＣ12との接続点は復調回路５２、制御回
路５３および変調・増幅回路５４の電源端子にそれぞれ
接続されている。また、復調回路５２、制御回路５３お
よび変調・増幅回路５４の各グランド端子と、受信アン
テナ５６および送信アンテナ５５とはそれぞれアースに
接続されている。Further, the connection points of the diode D 11 of the rectifier circuit 57 and the smoothing capacitor C 12 are connected to the power supply terminals of the demodulation circuit 52, the control circuit 53 and the modulation / amplification circuit 54, respectively. Further, the ground terminals of the demodulation circuit 52, the control circuit 53, and the modulation / amplification circuit 54, and the reception antenna 56 and the transmission antenna 55 are respectively connected to the ground.
【０００５】このようなポケット型携帯送受信機５０に
おいて、本体送受信機５８の送信アンテナ５９から送信
される微弱電波ＥＷは、この微弱電波ＥＷの周波数に共
振するように調整された受信アンテナ５６で受信され、
この受信アンテナ５６で誘起された誘導起電力が整流回
路５７で整流されることにより、復調回路５２、制御回
路５３および変調・増幅回路５４の電源として供給され
る。したがって、復調回路５２、制御回路５３および変
調・増幅回路５４が動作し、受信アンテナ５６で受信さ
れた微弱電波ＥＷを入力する復調回路５２によって必要
な情報信号が復調され、この情報信号に基づき制御回路
５３でＩＤ（識別符号）の書き込み等が行われる。この
制御回路５３で得られた情報を変調・増幅回路５４で変
調して、送信アンテナ５５から本体送受信機５８の受信
アンテナ（図示せず）に送信することができる。In such a pocket type portable transceiver 50, the weak radio wave EW transmitted from the transmitting antenna 59 of the main body transceiver 58 is received by the receiving antenna 56 adjusted so as to resonate with the frequency of the weak radio wave EW. Is
The induced electromotive force induced by the receiving antenna 56 is rectified by the rectifier circuit 57, and is supplied as a power source for the demodulation circuit 52, the control circuit 53, and the modulation / amplification circuit 54. Therefore, the demodulation circuit 52, the control circuit 53, and the modulation / amplification circuit 54 operate, and the necessary information signal is demodulated by the demodulation circuit 52 that inputs the weak radio wave EW received by the reception antenna 56, and control is performed based on this information signal. An ID (identification code) is written in the circuit 53. The information obtained by the control circuit 53 can be modulated by the modulation / amplification circuit 54 and transmitted from the transmission antenna 55 to the reception antenna (not shown) of the main body transceiver 58.
【０００６】このように、マンガン乾電池、水銀電池等
の一次電池やニッカド電池、２次リチューム電池等の二
次電池を電源として使用しなくとも、ポケット型携帯送
受信機として機能させることができる。As described above, it is possible to function as a pocket type portable transceiver without using a primary battery such as a manganese dry battery or a mercury battery or a secondary battery such as a nickel cadmium battery or a secondary lithium battery as a power source.
【０００７】[0007]
【発明が解決しようとする課題】しかしながら、このよ
うに構成されたポケット型携帯送受信機５０は受信アン
テナ５６に誘起した誘導起電力がダイオードＤ11をオン
させる電圧になると、図５に示すように整流回路５７の
コンデンサＣ12が受信アンテナ５６のコンデンサＣ11に
並列に接続されたことになるので、共振周波数がずれて
しまう問題点があった。However, when the induced electromotive force induced in the receiving antenna 56 becomes a voltage for turning on the diode D 11 in the pocket type portable transceiver 50 having such a structure, as shown in FIG. Since the capacitor C 12 of the rectifier circuit 57 is connected in parallel to the capacitor C 11 of the receiving antenna 56, there is a problem that the resonance frequency shifts.
【０００８】また、復調回路５２、制御回路５３および
変調・復調回路５４は負荷抵抗と見なせるので、図６に
示すように受信アンテナ５６の受信コイルＬ11およびコ
ンデンサＣ11に対して負荷抵抗Ｒが並列に接続されてい
ることになる。したがって、負荷抵抗Ｒがダンピング抵
抗になるので、著しくＱが低くなり選択度が悪くなる問
題点があった。Further, since the demodulation circuit 52, the control circuit 53 and the modulation / demodulation circuit 54 can be regarded as a load resistance, the load resistance R is applied to the receiving coil L 11 and the capacitor C 11 of the receiving antenna 56 as shown in FIG. It means that they are connected in parallel. Therefore, since the load resistance R becomes a damping resistance, there is a problem that the Q is remarkably lowered and the selectivity is deteriorated.
【０００９】[0009]
【発明の目的】本発明は、このような従来の問題点を解
決するためになされたもので、ＬＣ共振回路に誘起した
誘導起電力を後段に接続される回路の影響を受けずに整
流して電源とし、また共振周波数を調整可能にした電源
供給回路を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made to solve such conventional problems, and rectifies an induced electromotive force induced in an LC resonance circuit without being affected by a circuit connected in a subsequent stage. It is an object of the present invention to provide a power supply circuit in which the resonance frequency is adjustable as a power supply.
【００１０】[0010]
【課題を解決するための手段】このような目的を達成す
る本発明の電源供給回路は、信号源から送信される微弱
信号を利用して電源にする電源供給回路において、信号
源から送信される微弱信号の周波数に共振するように調
整するためのトリマー・コンデンサを有するＬＣ共振回
路と、ＬＣ共振回路で誘起された誘導起電力によってオ
ンされ半波整流するダイオードおよびダイオードで半波
整流された誘導起電力を充電する平滑コンデンサからな
る整流回路と、整流回路の平滑コンデンサに充電された
誘導起電力によって駆動されＬＣ共振回路に入力された
微弱信号を増幅する低出力インピーダンスの能動素子と
を備えたものである。The power supply circuit of the present invention which achieves such an object is transmitted from a signal source in a power supply circuit which uses a weak signal transmitted from a signal source to supply power. LC resonance circuit having a trimmer capacitor for adjusting to resonate at the frequency of a weak signal, a diode that is turned on by an induced electromotive force induced in the LC resonance circuit and half-wave rectified, and a half-wave rectified induction diode A rectifying circuit including a smoothing capacitor for charging an electromotive force, and an active element having a low output impedance for driving a weak signal input to the LC resonance circuit driven by the induced electromotive force charged in the smoothing capacitor of the rectifying circuit are provided. It is a thing.
【００１１】また、本発明の電源供給回路において整流
回路の能動素子は、ＣＭＯＳインバータＩＣが使用され
る。さらに、本発明の電源供給回路において整流回路の
能動素子にＣＭＯＳインバータＩＣを使用した場合、整
流回路はＣＭＯＳインバータＩＣに内蔵され入出力を保
護するダイオードと、平滑コンデンサとからなるもので
もよい。In the power supply circuit of the present invention, a CMOS inverter IC is used as the active element of the rectifier circuit. Further, when the CMOS inverter IC is used as the active element of the rectifier circuit in the power supply circuit of the present invention, the rectifier circuit may be composed of a diode which is built in the CMOS inverter IC and protects the input and output, and a smoothing capacitor.
【００１２】[0012]
【作用】ＬＣ共振回路で信号源から送信される微弱信号
と同じ周波数に共振点を合わせるために、トリマー・コ
ンデンサでＬＣ共振回路のコンデンサの容量を調整す
る。ＬＣ共振回路で共振周波数が得られるとＬＣ共振回
路には誘導起電力が誘起され、この誘導起電力によって
整流回路のダイオードはオンされる。オンされたダイオ
ードは誘導起電力を半波整流し、この半波整流された誘
導起電力は平滑コンデンサに充電される。この平滑コン
デンサに充電された誘導起電力によって低出力インピー
ダンスの能動素子を駆動させ、ＬＣ共振回路で誘起され
た誘導起電力に同期させて発振させる。これにより、信
号源からの微弱信号を増幅させると共にダイオードをオ
ンさせることができるので、再び能動素子を駆動させる
ことができる。In order to adjust the resonance point to the same frequency as the weak signal transmitted from the signal source in the LC resonance circuit, the capacitance of the LC resonance circuit capacitor is adjusted by the trimmer capacitor. When the resonance frequency is obtained by the LC resonance circuit, an induced electromotive force is induced in the LC resonance circuit, and the induced electromotive force turns on the diode of the rectifier circuit. The turned-on diode half-wave rectifies the induced electromotive force, and the induced electromotive force half-wave rectified is charged in the smoothing capacitor. An active element having a low output impedance is driven by the induced electromotive force charged in the smoothing capacitor, and oscillates in synchronization with the induced electromotive force induced in the LC resonance circuit. Accordingly, the weak signal from the signal source can be amplified and the diode can be turned on, so that the active element can be driven again.
【００１３】[0013]
【実施例】以下、本発明の電源供給回路を備えたポケッ
ト型携帯送受信機の一実施例について、図面を参照して
説明する。本発明の電源供給回路を備えたポケット型携
帯送受信機（応答器）は図１に示すように、電源供給回
路１、復調回路２、制御回路３、変調・増幅回路４およ
び送信アンテナ５を備えている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a pocket type portable transceiver having a power supply circuit of the present invention will be described below with reference to the drawings. As shown in FIG. 1, a pocket type portable transceiver (responder) having a power supply circuit of the present invention includes a power supply circuit 1, a demodulation circuit 2, a control circuit 3, a modulation / amplification circuit 4 and a transmission antenna 5. ing.
【００１４】電源供給回路１は信号源である本体送受信
機（質問器）６の送信アンテナ７から送信される微弱電
波ＥＷの周波数に共振するように調整するためのトリマ
ー・コンデンサＴＣを有するＬＣ共振回路８と、ＬＣ共
振回路８で誘起された誘導起電力によってオンされ半波
整流するショットキ・ダイオードＳＤおよびショットキ
・ダイオードＳＤで半波整流された誘導起電力を充電す
る平滑コンデンサＣ2からなる整流回路９と、整流回路
９の平滑コンデンサＣ2に充電された誘導起電力によっ
て駆動されＬＣ共振回路８に入力された微弱電波ＥＷを
増幅する低出力インピーダンスの能動素子であるＣＭＯ
ＳインバータＩＣ１０とを備えている。なお、本体送受
信機６の送信アンテナ７は送信コイルＬ1とコンデンサ
Ｃ1とからなり、またＬＣ共振回路８は受信アンテナと
して使用され、受信コイルＬ2とコンデンサＣ3とからな
る。The power supply circuit 1 is an LC resonance having a trimmer capacitor TC for adjusting the power supply circuit 1 so as to resonate with the frequency of the weak radio wave EW transmitted from the transmission antenna 7 of the main body transceiver (interrogator) 6 which is a signal source. Rectification consisting of the circuit 8 and the Schottky diode SD which is turned on by the induced electromotive force induced in the LC resonance circuit 8 and half-wave rectifies, and the smoothing capacitor C 2 which charges the induced electromotive force half-wave rectified by the Schottky diode SD. The circuit 9 and the CMO, which is an active element having a low output impedance, which is driven by the induced electromotive force charged in the smoothing capacitor C 2 of the rectifier circuit 9 and amplifies the weak electric wave EW input to the LC resonance circuit 8
And an S inverter IC 10. The transmission antenna 7 of the main body transceiver 6 is composed of a transmission coil L 1 and a capacitor C 1, and the LC resonance circuit 8 is used as a reception antenna and is composed of a reception coil L 2 and a capacitor C 3 .
【００１５】受信アンテナとして使用されるＬＣ共振回
路８はアースに接続されたコンデンサＣ3が受信コイル
Ｌ2に接続され、この受信コイルＬ2がアースに接続され
たトリマー・コンデンサＴＣに接続されている。この受
信コイルＬ2とトリマー・コンデンサＴＣとの接続点
は、整流回路９のショットキ・ダイオードＳＤのアノー
ドに接続され、このショットキ・ダイオードＳＤのカソ
ードはアースに接続された平滑コンデンサＣ2に接続さ
れている。In the LC resonance circuit 8 used as a receiving antenna, the capacitor C 3 connected to the ground is connected to the receiving coil L 2 , and the receiving coil L 2 is connected to the trimmer capacitor TC connected to the ground. There is. The connection point between the receiving coil L 2 and the trimmer capacitor TC is connected to the anode of the Schottky diode SD of the rectifier circuit 9, and the cathode of the Schottky diode SD is connected to the smoothing capacitor C 2 connected to the ground. ing.
【００１６】また、ＬＣ共振回路８のコンデンサＣ3と
受信コイルＬ2との間にはＣＭＯＳインバータＩＣ１０
の入力端子が接続され、このＣＭＯＳインバータＩＣ１
０の出力端子は受信コイルＬ2およびショットキ・ダイ
オードＳＤの接続点とトリマー・コンデンサＴＣとの間
に接続され、さらに復調回路２の入力側に接続されてい
る。このようなＣＭＯＳインバータＩＣ１０の電源端子
は整流回路９に接続され、グランド端子はアースに接続
されている。A CMOS inverter IC 10 is provided between the capacitor C 3 of the LC resonance circuit 8 and the receiving coil L 2.
Input terminal is connected to this CMOS inverter IC1
The output terminal of 0 is connected between the receiving coil L 2 and the connection point of the Schottky diode SD and the trimmer capacitor TC, and further connected to the input side of the demodulation circuit 2. The power supply terminal of such a CMOS inverter IC 10 is connected to the rectifier circuit 9, and the ground terminal is connected to the ground.
【００１７】復調回路２の出力側は制御回路３の入力側
に接続され、この制御回路３の出力側は変調・増幅回路
４を介して送信アンテナ５に接続されている。なお、送
信アンテナ５は送信コイルＬ3とコンデンサＣ4とからな
る。復調回路２、制御回路３および変調・増幅回路４の
電源端子は、それぞれ整流回路９に接続されている。ま
た、復調回路２、制御回路３および変調・増幅回路４の
各グランド端子と、送信アンテナ５とはそれぞれアース
に接続されている。The output side of the demodulation circuit 2 is connected to the input side of the control circuit 3, and the output side of the control circuit 3 is connected to the transmission antenna 5 via the modulation / amplification circuit 4. The transmitting antenna 5 is composed of a transmitting coil L 3 and a capacitor C 4 . Power supply terminals of the demodulation circuit 2, the control circuit 3, and the modulation / amplification circuit 4 are connected to the rectifier circuit 9, respectively. The ground terminals of the demodulation circuit 2, the control circuit 3, and the modulation / amplification circuit 4 and the transmission antenna 5 are connected to the ground.
【００１８】このように構成された電源供給回路１を備
えたポケット型携帯送受信機２０の動作について、以下
説明する。本体送受信機６の送信アンテナ７からポケッ
ト型携帯送受信機２０の受信アンテナとして使用される
ＬＣ共振回路８に微弱電波ＥＷが送信されると、ＬＣ共
振回路８はこの微弱電波ＥＷを受信する。この際、あら
かじめＬＣ共振回路８で微弱電波ＥＷと同じ周波数に共
振点を合わせるために、トリマー・コンデンサＴＣでＬ
Ｃ共振回路８のコンデンサＣ3の容量を調整しておく。
ＬＣ共振回路８で共振周波数が得られるとＬＣ共振回路
８には誘導起電力が誘起され、この誘導起電力は整流回
路９のショットキ・ダイオードＳＤをオンするだけの電
圧になる。The operation of the pocket type portable transceiver 20 provided with the power supply circuit 1 thus constructed will be described below. When the weak radio wave EW is transmitted from the transmission antenna 7 of the main body transceiver 6 to the LC resonance circuit 8 used as the reception antenna of the pocket type portable transceiver 20, the LC resonance circuit 8 receives the weak radio wave EW. At this time, in order to adjust the resonance point to the same frequency as the weak electric wave EW in the LC resonance circuit 8 in advance, the trimmer capacitor TC sets L
The capacitance of the capacitor C 3 of the C resonance circuit 8 is adjusted.
When the resonance frequency is obtained by the LC resonance circuit 8, an induced electromotive force is induced in the LC resonance circuit 8, and this induced electromotive force has a voltage enough to turn on the Schottky diode SD of the rectifier circuit 9.
【００１９】そして、ショットキ・ダイオードＳＤがオ
ンされると、ＬＣ共振回路８で誘起された誘導起電力は
半波整流され、この半波整流された誘導起電力は平滑コ
ンデンサＣ2に充電される。この平滑コンデンサＣ2に充
電された誘導起電力によって、ＣＭＯＳインバータＩＣ
１０、復調回路２、制御回路３および変調・増幅回路４
に電源が供給され、コンデンサＣ3、受信コイルＬ2およ
びトリマー・コンデンサＴＣからなるＬＣ共振回路８
と、ＣＭＯＳインバータＩＣ１０とから構成される発振
回路が、誘起された誘導起電力と同期して発振を始め
る。したがって、誘起された誘導起電力は復調回路２に
入力されると共にショットキ・ダイオードＳＤをオンさ
せ、再び電源として復調回路２、制御回路３、変調・増
幅回路４およびＣＭＯＳインバータＩＣ１０に供給され
る。また、受信コイル５に誘起した信号レベルが大きけ
れば大きいほど電源電圧ＶDDを上昇させることができ
る。When the Schottky diode SD is turned on, the induced electromotive force induced in the LC resonance circuit 8 is half-wave rectified, and the half-wave rectified induced electromotive force is charged in the smoothing capacitor C 2. . A CMOS inverter IC is generated by the induced electromotive force charged in the smoothing capacitor C 2.
10, demodulation circuit 2, control circuit 3 and modulation / amplification circuit 4
Is supplied to the LC resonance circuit 8 including a capacitor C 3 , a receiving coil L 2, and a trimmer capacitor TC.
And an oscillation circuit composed of the CMOS inverter IC 10 starts oscillation in synchronization with the induced electromotive force. Therefore, the induced electromotive force induced is input to the demodulation circuit 2, the Schottky diode SD is turned on, and is again supplied to the demodulation circuit 2, the control circuit 3, the modulation / amplification circuit 4 and the CMOS inverter IC 10 as a power source. Further, the higher the signal level induced in the receiving coil 5, the higher the power supply voltage V DD can be.
【００２０】次に、ＣＭＯＳインバータＩＣ１０で増幅
された微弱電波ＥＷは復調回路２で必要な情報信号が復
調され、この情報信号に基づき制御回路３でＩＤ（識別
符号）の書き込み等が行われる。この制御回路３で得ら
れた情報を変調・増幅回路４で変調して、送信アンテナ
５から本体送受信機６の受信アンテナ（図示せず）に送
信することができる。Next, the weak radio wave EW amplified by the CMOS inverter IC 10 is demodulated by the demodulation circuit 2 into a necessary information signal, and an ID (identification code) is written in the control circuit 3 based on this information signal. The information obtained by the control circuit 3 can be modulated by the modulation / amplification circuit 4 and transmitted from the transmitting antenna 5 to the receiving antenna (not shown) of the main body transceiver 6.
【００２１】なお、本実施例においては本体送受信機の
送信アンテナから送信された微弱電波を半波整流するた
めにショットキ・ダイオードが使用されていたが、これ
に限らず、図２に示すようにＣＭＯＳインバータＩＣ１
０に内蔵された入出力を保護するためのダイオードＤ1
を使用してもよい。また、本実施例においては無線によ
って送信される微弱電波を利用して電源にしていたが、
これに限らず、図３に示すように本実施例で用いられる
電源供給回路１のＬＣ共振回路８のコイルＬ2、コンデ
ンサＣ3間に微弱信号を出力する発振器１１を接続して
も、本実施例と同様の効果を得ることができる。In the present embodiment, the Schottky diode is used for half-wave rectifying the weak radio wave transmitted from the transmitting antenna of the main body transceiver, but not limited to this, as shown in FIG. CMOS inverter IC1
Diode D 1 for protecting input / output built in 0
May be used. In addition, in the present embodiment, the weak electric wave transmitted by radio was used as the power source,
Not limited to this, even if an oscillator 11 that outputs a weak signal is connected between the coil L 2 and the capacitor C 3 of the LC resonance circuit 8 of the power supply circuit 1 used in this embodiment as shown in FIG. The same effect as the embodiment can be obtained.
【００２２】さらに、本実施例においては能動素子にＣ
ＭＯＳインバータＩＣを用いていたが、これに限らず、
トランジスタを出力インピーダンスが低くなるように設
定して使用してもよい。Further, in this embodiment, the active element is C
Although the MOS inverter IC was used, it is not limited to this.
The transistor may be set and used so that the output impedance is low.
【００２３】[0023]
【発明の効果】本発明の電源供給回路によれば、信号源
から送信される微弱信号を利用して電源にする電源供給
回路において、信号源から送信される微弱信号の周波数
に共振するように調整するためのトリマー・コンデンサ
を有するＬＣ共振回路と、ＬＣ共振回路で誘起された誘
導起電力によってオンされ半波整流するダイオードおよ
びダイオードで半波整流された誘導起電力を充電する平
滑コンデンサからなる整流回路と、整流回路の平滑コン
デンサに充電された誘導起電力によって駆動されＬＣ共
振回路に入力された微弱信号を増幅する低出力インピー
ダンスの能動素子とを備えていることにより、持続性の
ある電源供給を行うことができるので効率がよくなる。According to the power supply circuit of the present invention, in a power supply circuit which uses a weak signal transmitted from a signal source as a power source, the power supply circuit resonates at the frequency of the weak signal transmitted from the signal source. An LC resonance circuit having a trimmer capacitor for adjusting, a diode which is turned on by an induced electromotive force induced in the LC resonance circuit and half-wave rectifies, and a smoothing capacitor which charges the half-wave rectified induced electromotive force by the diode A rectifier circuit and a low output impedance active element that is driven by the induced electromotive force charged in the smoothing capacitor of the rectifier circuit and amplifies a weak signal input to the LC resonance circuit Since it can be supplied, efficiency is improved.
【００２４】また、能動素子の出力インピーダンスが低
いことにより後段に接続される回路の影響を受けずに整
流して電源とすることができるので、Ｑの著しい低下を
防ぐことができる。さらに、能動素子出力段後の容量成
分等をトリマー・コンデンサで調整できるので、共振周
波数を簡単に補正することができる。Further, since the output impedance of the active element is low, the power can be rectified and used as a power source without being affected by the circuit connected in the subsequent stage, so that a significant decrease in Q can be prevented. Furthermore, since the capacitance component after the active element output stage can be adjusted by the trimmer capacitor, the resonance frequency can be easily corrected.
【図１】本発明の電源供給回路の一実施例を示す回路
図。FIG. 1 is a circuit diagram showing an embodiment of a power supply circuit of the present invention.
【図２】本発明の電源供給回路の他の実施例を示す部分
詳細図。FIG. 2 is a partial detailed view showing another embodiment of the power supply circuit of the present invention.
【図３】本発明の電源供給回路の他の実施例を示す回路
図。FIG. 3 is a circuit diagram showing another embodiment of the power supply circuit of the present invention.
【図４】従来の電源供給回路を示す回路図。FIG. 4 is a circuit diagram showing a conventional power supply circuit.
【図５】従来の電源供給回路の動作を示す説明図。FIG. 5 is an explanatory diagram showing the operation of a conventional power supply circuit.
【図６】従来の電源供給回路の動作を示す説明図。FIG. 6 is an explanatory diagram showing the operation of a conventional power supply circuit.
１‥‥電源供給回路 ６‥‥本体送受信機（信号源） ８‥‥ＬＣ共振回路 ９‥‥整流回路 １０‥‥ＣＭＯＳインバータＩＣ（能動素子） ＴＣ‥‥トリマー・コンデンサ ＳＤ‥‥ショットキ・ダイオード（ダイオード） Ｃ2‥‥平滑コンデンサ Ｄ1‥‥ダイオード1 ... Power supply circuit 6 ... Main body transceiver (signal source) 8 ... LC resonance circuit 9 ... Rectifier circuit 10 ... CMOS inverter IC (active element) TC ... Trimmer capacitor SD ... Schottky diode ( Diode) C 2・ ・ ・ Smoothing capacitor D 1・ ・ ・ Diode
Claims (3)
電源にする電源供給回路において、前記信号源から送信
される前記微弱信号の周波数に共振するように調整する
ためのトリマー・コンデンサを有するＬＣ共振回路と、
前記ＬＣ共振回路で誘起された誘導起電力によってオン
され半波整流するダイオードおよび前記ダイオードで半
波整流された前記誘導起電力を充電する平滑コンデンサ
からなる整流回路と、前記整流回路の前記平滑コンデン
サに充電された前記誘導起電力によって駆動され前記Ｌ
Ｃ共振回路に入力された前記微弱信号を増幅する低出力
インピーダンスの能動素子とを備えたことを特徴とする
電源供給回路。1. A power supply circuit that uses a weak signal transmitted from a signal source as a power source, and includes a trimmer capacitor for adjusting so as to resonate at the frequency of the weak signal transmitted from the signal source. An LC resonant circuit having
A rectifying circuit including a diode that is turned on by an induced electromotive force induced in the LC resonant circuit and rectifies half-wave, and a smoothing capacitor that charges the induced electromotive force half-wave rectified by the diode, and the smoothing capacitor of the rectifying circuit. Driven by the induced electromotive force charged to
A power supply circuit, comprising: an active element having a low output impedance for amplifying the weak signal input to the C resonance circuit.
ンバータＩＣであることを特徴とする請求項１記載の電
源供給回路。2. The power supply circuit according to claim 1, wherein the active element of the rectifier circuit is a CMOS inverter IC.
Ｃに内蔵され入出力を保護するダイオードと、前記整流
回路の前記平滑コンデンサとからなることを特徴とする
請求項２記載の電源供給回路。3. The rectifier circuit comprises the CMOS inverter I
3. The power supply circuit according to claim 2, wherein the power supply circuit comprises a diode built in C to protect the input and output, and the smoothing capacitor of the rectifier circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12779495A JP3624009B2 (en) | 1995-05-26 | 1995-05-26 | Power supply circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12779495A JP3624009B2 (en) | 1995-05-26 | 1995-05-26 | Power supply circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08321797A true JPH08321797A (en) | 1996-12-03 |
| JP3624009B2 JP3624009B2 (en) | 2005-02-23 |
Family
ID=14968846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12779495A Expired - Fee Related JP3624009B2 (en) | 1995-05-26 | 1995-05-26 | Power supply circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3624009B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011216130A (en) * | 2004-04-01 | 2011-10-27 | Wacom Co Ltd | Cordless power supply panel and method for generating dc operating power for cordless transducer |
-
1995
- 1995-05-26 JP JP12779495A patent/JP3624009B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011216130A (en) * | 2004-04-01 | 2011-10-27 | Wacom Co Ltd | Cordless power supply panel and method for generating dc operating power for cordless transducer |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3624009B2 (en) | 2005-02-23 |
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