CN104300939B - A kind of circuit that level signal is converted to pulsed magnetic field signal - Google Patents
A kind of circuit that level signal is converted to pulsed magnetic field signal Download PDFInfo
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- CN104300939B CN104300939B CN201410513003.5A CN201410513003A CN104300939B CN 104300939 B CN104300939 B CN 104300939B CN 201410513003 A CN201410513003 A CN 201410513003A CN 104300939 B CN104300939 B CN 104300939B
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/0175—Coupling arrangements; Interface arrangements
- H03K19/017545—Coupling arrangements; Impedance matching circuits
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K19/00—Logic circuits, i.e. having at least two inputs acting on one output; Inverting circuits
- H03K19/0008—Arrangements for reducing power consumption
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Abstract
本发明涉及一种将电平信号转换为脉冲磁场信号的电路。目前应用于磁电信号隔离耦合器件的“电平‑磁场”转换电路存在较高的静态功耗。本发明包含防抖电路，延时电路，线圈驱动电路A，线圈驱动电路B和励磁线圈；防抖电路处于信号输入端，用于抑制输入信号抖动；延时电路连接于防抖电路与线圈驱动电路B之间，使输入线圈驱动电路B的信号相对于输入线圈驱动电路A的信号存在一个特定的延时；线圈驱动电路A连接于防抖电路与励磁线圈正极之间，对励磁线圈提供正向驱动电流；线圈驱动电路B连接于延时电路与励磁线圈负极之间，对励磁线圈提供反向驱动电流。本发明应用于磁电信号隔离耦合器件中，可以显著降低其使用功耗。
The invention relates to a circuit for converting a level signal into a pulsed magnetic field signal. At present, the "level-magnetic field" conversion circuit applied to the magnetic-electrical signal isolation coupling device has high static power consumption. The present invention comprises anti-shake circuit, delay circuit, coil drive circuit A, coil drive circuit B and exciting coil; Between the circuits B, there is a specific delay between the signal input to the coil drive circuit B and the signal input to the coil drive circuit A; the coil drive circuit A is connected between the anti-shake circuit and the positive pole of the excitation coil, and provides a positive voltage for the excitation coil. Direct drive current; coil drive circuit B is connected between the delay circuit and the negative pole of the excitation coil, and provides reverse drive current to the excitation coil. The invention is applied to a magnetoelectric signal isolation coupling device, which can significantly reduce its power consumption.
Description
技术领域technical field
本发明属于电子电路技术领域，涉及一种将电平信号转换为脉冲磁场的电路。The invention belongs to the technical field of electronic circuits, and relates to a circuit for converting a level signal into a pulsed magnetic field.
背景技术Background technique
对于利用磁场进行数据通信的设备，如磁电信号隔离耦合器件、植入式心脏起搏器通讯系统等，其工作过程中需要将电信号转化为磁信号，再由磁敏元件探测并被读取电路采集，从而实现信号传输。这其中，“电平-磁场”转换电路是一个不可或缺的组成单元。现有方案是将磁场信号直接与电平信号对应，例如：高电平时输出磁场信号，低电平时无磁场信号；或者高电平时输出正向磁场信号，低电平时输出反向磁场信号。以上方案均存在持续时间较长的电流通过励磁线圈，因而存在较高的静态功耗，难以应用于低功耗便携设备。For devices that use magnetic fields for data communication, such as magnetic and electrical signal isolation coupling devices, implantable cardiac pacemaker communication systems, etc., the electrical signal needs to be converted into a magnetic signal during the working process, and then detected and read by the magnetic sensitive element The acquisition circuit is used to realize signal transmission. Among them, the "level-magnetic field" conversion circuit is an indispensable component. The existing solution is to directly correspond the magnetic field signal to the level signal, for example: output a magnetic field signal when the level is high, and no magnetic field signal when the level is low; or output a positive magnetic field signal when the level is high, and output a reverse magnetic field signal when the level is low. All of the above solutions have a long duration of current passing through the exciting coil, so there is a high static power consumption, which is difficult to apply to low-power portable devices.
发明内容Contents of the invention
本发明针对现有“电平-磁场”转换电路存在的不足，提供了一种将电平信号转换为脉冲磁场的电路方案，该方案能够显著降低电路的静态功耗。Aiming at the shortcomings of the existing "level-magnetic field" conversion circuit, the invention provides a circuit solution for converting a level signal into a pulsed magnetic field, which can significantly reduce the static power consumption of the circuit.
本发明解决技术问题所采取的技术方案为：The technical scheme that the present invention solves technical problem to take is:
一种将电平信号转换为脉冲磁场信号的电路，包含防抖电路，延时电路，线圈驱动电路A，线圈驱动电路B和励磁线圈。A circuit for converting a level signal into a pulsed magnetic field signal, comprising an anti-shake circuit, a delay circuit, a coil drive circuit A, a coil drive circuit B and an excitation coil.
所述防抖电路处于信号输入端，用于抑制输入信号抖动。The anti-shake circuit is located at the signal input end, and is used for suppressing the jitter of the input signal.
所述延时电路连接于防抖电路与线圈驱动电路B之间，使输入线圈驱动电路B的信号相对于输入线圈驱动电路A的信号存在一个特定的延时。The delay circuit is connected between the anti-shake circuit and the coil drive circuit B, so that the signal input to the coil drive circuit B has a specific delay relative to the signal input to the coil drive circuit A.
所述线圈驱动电路A连接于防抖电路与励磁线圈正极之间，对励磁线圈提供正向驱动电流。The coil drive circuit A is connected between the anti-shake circuit and the positive pole of the exciting coil, and provides a forward driving current to the exciting coil.
所述线圈驱动电路B连接于延时电路与励磁线圈负极之间，对励磁线圈提供反向驱动电流。The coil driving circuit B is connected between the delay circuit and the negative pole of the exciting coil, and provides reverse driving current to the exciting coil.
对于所输入电平信号的上升沿或下降沿，励磁线圈产生对应的正向或者反向脉冲磁场。For the rising edge or falling edge of the input level signal, the excitation coil generates a corresponding forward or reverse pulse magnetic field.
对于所输入电平信号处于稳定状态的高电平或低电平，励磁线圈不产生磁场。For the high level or low level of the input level signal in a stable state, the excitation coil does not generate a magnetic field.
进一步说，所述防抖电路是施密特触发器或迟滞比较器。Further, the anti-shake circuit is a Schmitt trigger or a hysteresis comparator.
本发明的有益效果：本发明中转换电路采集电平转换的边沿信号，输出对应的电流脉冲驱动励磁线圈；当电平信号稳定时，没有电流通过励磁线圈。因此，本发明中“电平-磁场”转换电路在静态下仅存在由漏电流产生的微小功耗，相比于其他同类方案，功耗显著降低。Beneficial effects of the present invention: the conversion circuit in the present invention collects the edge signal of level conversion, and outputs the corresponding current pulse to drive the excitation coil; when the level signal is stable, no current flows through the excitation coil. Therefore, the "level-magnetic field" conversion circuit in the present invention only has tiny power consumption caused by leakage current under static conditions, and compared with other similar solutions, the power consumption is significantly reduced.
附图说明Description of drawings
图1为本发明电路原理图。Fig. 1 is the schematic circuit diagram of the present invention.
具体实施方式detailed description
以下结合附图对本发明作进一步说明。The present invention will be further described below in conjunction with accompanying drawing.
本发明所述的将电平信号转换为脉冲磁场的装置如图1所示。该电路由防抖电路101，延时电路102，线圈驱动电路A103，线圈驱动电路B104四个子电路以及励磁线圈105五个部分组成。The device for converting a level signal into a pulsed magnetic field according to the present invention is shown in FIG. 1 . The circuit is composed of anti-shake circuit 101 , delay circuit 102 , coil drive circuit A103 , coil drive circuit B104 , four sub-circuits and excitation coil 105 .
防抖电路101接收输入信号106，通过其所具备的对信号抖动的抑制功能，消除信号自身或外部干扰所引起的毛刺对后续电路产生的不利影响。The anti-shake circuit 101 receives the input signal 106 , and through its function of suppressing signal jitter, it eliminates the adverse effects of the glitches caused by the signal itself or external interference on subsequent circuits.
防抖电路101输出两个完全相同的信号，其中一个信号直接输入线圈驱动电路A103，另一个信号先通过延时电路102，然后输入线圈驱动电路B104。因此，输入线圈驱动电路B104的信号边沿相对于输入线圈驱动电路A103的信号边沿存在一个特定的延时Δt。The anti-shake circuit 101 outputs two identical signals, one of which is directly input to the coil drive circuit A103, and the other signal is first passed through the delay circuit 102 and then input to the coil drive circuit B104. Therefore, there is a specific delay Δt between the signal edge input to the coil driving circuit B104 and the signal edge input to the coil driving circuit A103.
线圈驱动电路A103和线圈驱动电路B104完全相同，因此线圈驱动电路B104输出的信号边沿相对线圈驱动电路A103同样存在延时Δt。The coil driving circuit A103 is identical to the coil driving circuit B104, so the signal edge output by the coil driving circuit B104 also has a time delay Δt relative to the coil driving circuit A103.
当输入信号上升沿到来时，线圈驱动电路A103输出的信号先转变为高电平，此时线圈驱动电路B104输出的信号仍为低电平；在经过时间Δt之后，线圈驱动电路B104输出的信号转变为高电平。以上过程将形成一个由励磁线圈105正(+)端流向负(-)端的电流脉冲，该电流脉冲的脉宽为Δt。When the rising edge of the input signal arrives, the signal output by the coil drive circuit A103 first changes to high level, and at this time the signal output by the coil drive circuit B104 is still low level; after time Δt, the signal output by the coil drive circuit B104 transition to a high level. The above process will form a current pulse flowing from the positive (+) end to the negative (-) end of the exciting coil 105, and the pulse width of the current pulse is Δt.
相应的，当输入信号下降沿到来时，将形成一个强度、脉宽相同，方向相反的电流脉冲。Correspondingly, when the falling edge of the input signal arrives, a current pulse with the same intensity and pulse width and opposite direction will be formed.
不同方向的电流脉冲通过励磁线圈，输出磁场脉冲信号107。Current pulses in different directions pass through the excitation coil, and a magnetic field pulse signal 107 is output.
当输入信号106处于高电平或是低电平的稳定状态时，励磁线圈105的正(+)端和负(-)端的电位相同，因此没有电流流过线圈，静态功耗近似为零。When the input signal 106 is in a steady state of high level or low level, the potentials of the positive (+) terminal and the negative (-) terminal of the exciting coil 105 are the same, so no current flows through the coil, and the static power consumption is approximately zero.
根据以上过程，本发明所述电路具备将电平信号转换为磁场脉冲的功能，并显著降低了静态功耗。According to the above process, the circuit of the present invention has the function of converting level signals into magnetic field pulses, and significantly reduces static power consumption.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1797933A (en) * | 2004-12-21 | 2006-07-05 | 乐金电子(天津)电器有限公司 | Control system of switch magnetic resistance motor, and control method |
| CN101644591A (en) * | 2009-09-08 | 2010-02-10 | 合肥工业大学 | Mono-dual frequency electromagnetic flowmeter excitation control system based on linear power supply |
| CN102182933A (en) * | 2011-03-22 | 2011-09-14 | 江南大学 | Nondestructive detection system and method for pulsed magnetic flux leakage defects and stresses |
| CN103759773A (en) * | 2014-02-18 | 2014-04-30 | 北京中锐智诚科技有限公司 | Exciting voltage regulation method, control circuit and exciting circuit of electromagnetic flow meter |
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| JP3829838B2 (en) * | 2003-11-05 | 2006-10-04 | ソニー株式会社 | Sensorless brushless motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1797933A (en) * | 2004-12-21 | 2006-07-05 | 乐金电子(天津)电器有限公司 | Control system of switch magnetic resistance motor, and control method |
| CN101644591A (en) * | 2009-09-08 | 2010-02-10 | 合肥工业大学 | Mono-dual frequency electromagnetic flowmeter excitation control system based on linear power supply |
| CN102182933A (en) * | 2011-03-22 | 2011-09-14 | 江南大学 | Nondestructive detection system and method for pulsed magnetic flux leakage defects and stresses |
| CN103759773A (en) * | 2014-02-18 | 2014-04-30 | 北京中锐智诚科技有限公司 | Exciting voltage regulation method, control circuit and exciting circuit of electromagnetic flow meter |
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