JP3061446U - Insertion-type electronic device that does not require power interruption when attaching or detaching - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide an insertion-type electronic device that does not require a power cut when attaching and detaching. SOLUTION: The insertion type electronic device which does not require a power cut when attaching and detaching the present invention is as follows, that is, as one detection device,
The above detection device, which detects the insertion / removal state of a module and sends a corresponding control signal, is a control circuit, and requires the circuit for insertion / removal of the module in response to the control signal. The first circuit portion, one of the first circuit portions, wherein the control circuit, which adjusts the operation, serves as one first circuit portion and delays the rise time of the input voltage under the control of the control circuit when the module is inserted. The second circuit portion, which is a second circuit portion and provides a path that is rapidly discharged under control of the control circuit when the module is removed.
It is assumed that the above is configured comprehensively.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a type of insertion-type electronic device that does not require a power cut when attaching and detaching, and a control signal sent from a switch capable of detecting a state of insertion / removal of an insertion-type electronic device module causes an operation current to be generated when the module is inserted / removed. The present invention relates to a device capable of reducing the inrush current at the time of insertion by being affected by the insertion type electronic device and providing an effect of rapidly discharging at the time of removal to prevent generation of sparks.

[0002]

[Prior art]

 With the advancement of semiconductor and microprocessor technology, many electronic devices, such as insertable hard disks, modems, and network cards, have been modularized and will be used for processing data with microprocessors or for transmitting digital data. Became. When a failure occurs or a test is performed on these electronic device modules, the power of the entire system is usually shut down, and the module is removed, replaced, or inspected. Usually, the power is first cut off to the bean seed accommodating box 60 in which the module is replaced and a new module is inserted. However, in special applications, such as airfield terminal systems and military applications, it is not possible to shut off the power supply at any time. It would be very convenient to use electronic equipment modules such as insertable hard disks, modems, network cards, etc. in existing facilities.

[0005] However, the conventional insertion type electronic module which does not require a disconnection at the time of attachment / detachment has a problem that an inrush current is often generated at the time of insertion and a spark is generated at the time of removal. In the module, there is an input capacitor affected by the Miller effect, and there is a decoupling capacitor inserted in the board. When the module is inserted, a step voltage is applied to the module, which causes a considerable amount of step voltage. A large inrush current can be generated in a short time. Fig. 1 is a survey diagram simulating the insertion of one module. The input equivalent capacitance of the module is 1000 µF and the equivalent electrical resistance is 32Ω. This is the result of circuit simulation of the module voltage. When a step voltage is input, the maximum value of the input current is 17.56 A (the lower curve scale is 10 mV / 5 A), which is greater than the much more stable working current, ie, 5 V / 32 Ω = 0. At 16A, the power became 100 times or more, and this module or the power supply connected thereto could be damaged.

[0004] Furthermore, when the module is extracted, the discharge time is prolonged because the module has the above-mentioned high capacitance value. At the time of the extraction, if there is still residual charge in the module, a spark is generated and danger occurs. FIG. 2 is a survey diagram simulating the extraction of one module. The equivalent input capacitance of the module is 1000 μF and the equivalent electrical resistance is 32Ω. Two falling step function input voltages, under which the circuit simulation results in a module current fall time (maximum 10% fall time) of approximately 72.66 milliseconds (see lower curve). there were. The time for general module removal is much shorter than this time (discussed in detail below), and there is a risk that the visible charge still remaining on the module will cause a spark.

See also FIG. 3 and FIG. These figures show the time required for actual contact and separation of the pins when inserting and removing the module, respectively. As shown in Fig. 3, when a module is inserted, a considerable number of module terminals (about 50%) require more than 30 milliseconds to contact corresponding terminals, and some exceed 100 milliseconds. Takes time. For this reason, when the input voltage is not properly specified at the time of insertion, a signal bounce problem occurs, and other signals on the shared bus may be affected. As shown in FIG. 4, when the module is removed, the separation time between most of the module terminals and the corresponding terminals is within 2.5 milliseconds, and this value is equal to the above-mentioned module current fall time of 72.66 milliseconds. Since it is much smaller, an insertion-type electronic device that does not require a power cut during ideal attachment / detachment needs to have an extremely quick discharge time at the time of removal. However, the prior art did not provide such a feature.

[0006]

[Problems to be solved by the invention]

 SUMMARY OF THE INVENTION It is an object of the present invention to provide an insertion-type electronic device which can avoid a bounce problem and an inrush current problem at the time of module insertion and which does not require a power interruption at the time of attachment / detachment.

Another object of the present invention is to provide an insertion-type electronic device that does not require a disconnection at the time of attachment / detachment in which current is rapidly discharged when a module is removed.

[0008]

[Means for Solving the Problems]

 The invention according to claim 1 is an insertion-type electronic device that does not require a disconnection at the time of attachment / detachment. The insertion-type electronic device detects the insertion / removal state of a module as a single detection device and a corresponding control signal. The detection device, the control circuit being one control circuit, receiving the control signal described above, and adjusting the operation required by the circuit at the time of module insertion and removal, the one control circuit; The first circuit part, which is controlled by the control circuit when the module is inserted, and delays the rise time of the input voltage when the module is inserted. The above-mentioned second circuit portion, which provides a path for rapid discharge under control, is an insertion-type electronic device that includes the above-described components and that does not need to be turned off when attached or detached.

[0009] The invention according to claim 2 further includes a vibrator and a voltage doubler circuit for providing a necessary pulse signal and voltage, wherein the insertion without disconnection is not required at the time of attachment and detachment according to claim 1. It is an electronic device.

[0010] The invention according to claim 3 is characterized in that the detection device is a switch circuit connected to the longest and shortest terminals of the module, and sends out the control signal according to the open / close state of the terminal and the corresponding terminal. According to the first aspect of the present invention, there is provided an insertion-type electronic device which does not require a disconnection when attaching and detaching.

The invention according to claim 4 is characterized in that the first circuit part is a delay circuit composed of one integrator and a comparator, and a ramp-up circuit composed of another one integrator and a power MOSFET. The insertion-type electronic device according to claim 1, which does not require a power cut when attaching and detaching.

[0012] The invention of claim 5 is characterized in that the second circuit portion comprises a gate discharge circuit and a source discharge circuit, and provides a discharge path to the junction capacitor of the power MOSFET when the module is removed. According to the first or fourth aspect of the present invention, there is provided an insertion-type electronic device that does not require a power interruption when attaching or detaching.

[0013] The invention according to claim 6 is characterized in that the gate discharge circuit is a diode connected between the gate of the power MOSFET and a control circuit, and the power is cut off at the time of attachment / detachment according to claim 5. It is an unnecessary insertion type electronic device.

The invention according to claim 7 is characterized in that the gate discharge circuit is an SCR connected between a source of the power MOSFET and a control circuit, and there is no need for disconnection when attaching or detaching. It is an insertion type electronic device.

[0015] The invention according to claim 8 is an insertion type electronic device which does not require a power cut-off at the time of attachment / detachment, and which is a switch, detects the insertion / removal state of a module, and performs a corresponding control. The above-mentioned switch for transmitting a signal, which is one control circuit, receives the above-mentioned control signal, adjusts the operation required by the circuit at the time of insertion and removal of the module, and connects the two connected PNP and NPN transistors. A control signal of the switch is connected to the base of the NPN transistor, a collector of the NPN transistor is connected to the base of the PNP transistor, an emitter of the NPN transistor is grounded, and an emitter of the PNP transistor is connected to the power supply. The above control circuit, which is regarded as one first circuit part, is controlled by the control circuit when the module is inserted, and when the input voltage rises. A delay circuit, a ramp-up circuit, the delay circuit is composed of a first integrator and a comparator, and a negative voltage input terminal of the first integrator is connected to a collector of the PNP transistor. The output of the first integrator is connected to the positive voltage input terminal of the comparator, the ramp-up circuit is composed of one second integrator and a power MOSFET, and the comparator of the ramp-up circuit is connected to The first circuit part and the one second circuit part connected to the negative voltage input terminal of the second integrator via two inverters, and the output of the second integrator is connected to the gate of the power MOSFET. The second circuit portion includes a gate discharge circuit and a source discharge circuit, and provides a path for rapid discharge under the control of the control circuit when the module is removed. And, have a deenergized unnecessary insertion electronic device during detachment.

The invention according to claim 9 is characterized in that the gate discharge circuit is a diode connected to the gate of the power MOSFET and the collector of the NPN transistor. It is an unnecessary insertion type electronic device.

The invention according to claim 10 is characterized in that the source discharge circuit is a diode connected to the source of the power MOSFET and the collector of the NPN transistor, and the power is cut off at the time of attachment / detachment according to claim 8. It is an unnecessary insertion type electronic device.

The invention according to claim 11 is characterized in that the source discharge circuit is an SCR connected to the source of the power MOSFET and the collector of the NPN transistor. It is an insertion type electronic device.

According to a twelfth aspect of the present invention, the source discharge circuit is one PNP transistor connected to the source of the power MOSFET and the collector of the NPN transistor, the emitter is connected to the source of the power MOSFET, and the base is connected to the source of the power MOSFET. The insertion-type electronic device according to claim 8, wherein the device is connected to the collector of the NPN transistor and does not need to be disconnected when being attached or detached.

The invention according to claim 13 is that the source discharge circuit is one P-channel MOSFET connected to the source of the power MOSFET and the collector of the NPN transistor, and the gate thereof is connected to the source of the power MOSFET. The electronic device according to claim 8, wherein the base is connected to the collector of the NPN transistor.

The invention according to claim 14 is characterized in that the source discharge circuit is a first and a second NPN transistor connected to a source of the power MOSFET and a collector of the NPN transistor, and a base of the first NPN transistor is a collector of the NPN transistor. 9. The power supply of claim 8, wherein the collector of the second NPN transistor is connected to the source of the power MOSFET, and the collector of the first NPN transistor is connected to the base of the second NPN transistor. It is an unnecessary insertion type electronic device.

According to a fifteenth aspect of the present invention, there is provided an insertion-type electronic device according to the fourteenth aspect, wherein the first NPN transistor is replaced with a P-channel MOSFET.

According to a further aspect of the present invention, the source discharge circuit is a PNP transistor and an NPN transistor connected to the source of the power MOSFET and the collector of the NPN transistor of the control circuit, and the collector of the NPN transistor of the control circuit is 9. The PNP transistor of claim 8, wherein a collector of the PNP transistor is connected to a base of the NPN transistor, and a collector of the NPN transistor is connected to a source of the power MOSFET. It is an insertion-type electronic device that does not require a power interruption when attaching and detaching.

[0024]

[Embodiment of the invention]

 The insertion-type electronic device that does not require a power interruption when attaching or detaching the present invention is as follows: a detection device that detects insertion and removal of a module and sends a corresponding control signal. A control circuit for controlling an operation required by a circuit at the time of insertion and removal of a module in response to the above-mentioned control signal; The first circuit part and the one second circuit part delay the rise time of the input voltage under the control of the control circuit at the time of insertion, and rapidly under the control of the control circuit at the time of module removal. The second circuit portion, which provides a path for discharging, is configured to include the above.

[0025]

【Example】

 FIG. 5 is a block diagram of a specific embodiment of the insertion-type electronic device according to the present invention, which does not require a power interruption when attaching and detaching. It has one detector 10 for detecting the insertion and removal status of the module and transmitting a corresponding control signal, one vibrator 20 for generating a pulse signal when necessary, and one for generating a doubled voltage required for operation. One voltage doubler circuit 30 receives the control signal and adjusts the operation required by the circuit when inserting and removing the module. One control circuit 40. When the module is inserted, the input voltage is controlled by the control circuit 40. One first circuit part 50 that delays the rise time of the first circuit part, and one second circuit part 60 that provides a path for rapid discharge under the control of the control circuit when the module is removed. Have been.

FIG. 6 is a detailed electric circuit diagram of a portion 20-60 in the block of FIG. The detection device 10 can detect the insertion and removal operation of the module and sends a control voltage to the control circuit 40. According to the present invention, the switch signal SW is transmitted depending on whether the longest terminal and the shortest terminal of the module have contacted the corresponding terminals. In a well-known technique, a step voltage is directly applied after detecting the state of insertion and removal of a module by such a detection device. Since the detailed structure of the detection device 10 is not a feature of the present invention, a detailed description is omitted. The vibrator 20 is formed by connecting NAND gates U1A, U1B and U1D, resistors R4 and R5, and capacitors C1 and C2. Of these, the NAND gates U1A and U1B form a free-running oscillator. I have. Resistors R4, R5 and capacitors C1, C2 are used to set the oscillation frequency. NAND gate U1D forms a waveform shaping circuit. The voltage doubler circuit 30 is connected to the output of the NAND gate U1D of the vibrator, which is formed by connecting the transistors Q1 and Q2, the resistors R1 to R3, the capacitors C3 and C4, and the diodes D1 and D2. , Q2 form a push-pull drive circuit. The diodes D1 and D2 are configured as Schottky barrier diodes to reduce the deviation of the forward potential. When the output signal of NAND gate U1D is at a high level, transistor Q1 does not conduct, transistor Q2 conducts, its collector is at a low level, negative terminal 5 of capacitor C3 is at a low level, and transistor Q2 is saturated. Then, the negative terminal of the capacitor C3 becomes the ground level, and the power supply VCC (5 V) charges the capacitors C3 and C4 via the diodes D1 and D2 until their potentials reach Vcc. When the output signal of the NAND gate U1D changes from the high level to the low level, the transistor Q1 is turned on and the transistor Q2 is turned off. At this time, the output of the voltage doubler circuit becomes 2 Vcc (10 V).

The control circuit 40 is formed by connecting transistors Q3 and Q4, resistors R6, R7, R8 and R9, and a capacitor C10. In addition, the switch voltage signal SW of the above-described detection device is sent to the base of the transistor Q3, so that the control circuit 40 controls other circuit parts of the device of the present invention. When in the idle mode, the switch SW is open (the module portion is removed), transistor Q3 is conducting, its collector is low, transistor Q4 is conducting, and its collector holds a 10V voltage. . Conversely, when the switch SW is closed (module inserted state), the transistor Q3 is non-conductive and its collector is kept at a high level, and the transistor Q4 is non-conductive and its collector is set to 0V, thereby causing the subsequent circuit to operate. Controlled.

The first circuit part 50 includes a delay circuit 502 for avoiding the bounce problem, and includes an integrating circuit 502a composed of an amplifier U2A, resistors R10, R11, R12, R12-1 and a capacitor C5. In addition, it includes a comparator 502b and a voltage dividing circuit 502c composed of an amplifier U2B, resistors R13 and R14. The first circuit portion 50 further includes a ramp up generation circuit 504 and an output circuit 506. The ramp-up generating circuit 504 includes an inverter circuit 504a composed of a transistor Q5 and resistors R15 and R16, and an integrating circuit 504b composed of an amplifier U3A, resistors R17, R18, R19 and R20 and a capacitor C1. The output circuit 506 includes a pair of power MOSFETs and resistors R20, R21, R22, and R23.

When the switch SW is closed (module inserted state), the transistor Q4 is non-conductive and its collector is set to 0 V. At this time, the integration circuit 502a starts to operate, and the integration constant is a resistor R10 and a capacitor. When the output of the integrating circuit 502a is lower than the potential of the negative input terminal of the comparator U2B (determined by the voltage dividing circuit 502c composed of the resistors R13 and R14) and is determined by C5, the comparator U2B takes one step. Output voltage. Thereby, the integration time constant and the resistors R13 and R14 of the voltage dividing circuit are adjusted, and the applied voltage time after the module is inserted is delayed.

FIG. 7 shows the output voltage waveforms of the integrator 502a (upper curve) and the comparator 502b (lower curve). The delay circuit is selected by selecting an appropriate time constant and a voltage dividing resistor. One rising step voltage is generated 23.64 milliseconds after 502 closes the switch SW (module insertion state).

When the switch SW is kept open (during module removal), the output of the delay circuit 502 is 0 volts, the transistor Q5 conducts (saturates), and one reference voltage of 10 V is generated at its collector. . Thus, the output of the ramp-up generation circuit 504 via the output circuit 506 becomes 0. After a certain delay time after the switch SW is closed (module insertion state), the delay circuit 502 outputs 10 volts, the transistor Q5 is turned off, and its collector generates a reference voltage of about 0 volts. This activates the integration circuit 504b, which generates one rising ramp-up voltage to provide the working voltage required by the module, and the time constant of the ramp-up voltage is determined by the resistor R17 and the capacitor C1.

As described above, since the switch voltage, the control circuit 40 and the first electric circuit portion of the present invention are applied in a ramp-up manner after a certain time delay after the module is inserted, the inrush current is reduced. Decrease.

When the module is removed, the power MOSFET in the output circuit 506 has a junction surface capacity (or called an input capacity) where a Miller effect occurs, and eliminates the charge in the decoupling capacitor on the module substrate. There is a need to. In the present invention, there is one second circuit portion 60, which provides a path for rapid discharge under the control of the control circuit when the module is removed. The second circuit portion 60 includes a gate discharge circuit 602 and a source discharge circuit 604, and as shown in FIG. 6, in the first specific embodiment of the present invention, the gate discharge circuit 602 Diodes D3 and D4 are connected between the gate of the MOSFET pair U7 and the collector of the transistor Q3 of the control circuit 40. When the module is removed, the switch SW can be kept open, and the transistor Q3 of the control circuit 40 is saturated. This can cause the collector voltage to drop, allowing the gate charge of the power MOSFET pair U7 to flow quickly through this path.

As shown in FIG. 6, the gate discharge circuit 604 includes a pair of a PNP transistor Q6 and an NPN transistor Q7 connected between the source of the power MOSFET pair U7 and the collector of the transistor Q3 of the control circuit 40, and a PNP transistor. Q8 is an NPN transistor Q9 pair. When the module is removed, the switch SW is kept open, the transistor Q3 of the control circuit 40 is saturated, its collector voltage is decreased, and the transistors Q6 and Q8 are saturated, whereby the base voltages of the transistors Q7 and Q9 are increased. , The transistors Q7, Q9 thereby conduct and the source charge is eliminated.

In addition, as shown in FIG. 8, the source discharge circuit 604 according to the second embodiment of the present invention is grounded by one SCR. The SCR can be replaced by a diode.

In addition, as shown in FIG. 9, in the source discharge circuit 604 according to the third embodiment of the present invention, one PNP transistor Q 10 is composed of a power MOSFET pair and the source of U 7 and the transistor of the control circuit 40. Q3, the emitter of which is connected to the source of power MOSFET pair U7, and the base of which is connected to the collector of transistor Q3. When the module is removed, the switch SW is kept open, the transistor Q3 of the control circuit 40 saturates, its collector voltage falls, the PNP transistor Q10 conducts, and the charge of the source of the power MOSFET pair U7 is discharged. You.

As shown in FIG. 10, in the source discharge circuit 604 according to the fourth embodiment of the present invention, one P-channel MOSFET Q11 is connected to the source of the power MOSFET U7 and the control circuit 40. , The gate of which is connected to the source of the power MOSFET pair U7, and the source of which is connected to the collector of the transistor Q3. When the module is removed, the switch SW keeps the open state, the transistor Q3 of the control circuit 40 saturates, its collector voltage falls, the P-channel MOSFET Q11 conducts, and the electric charge of the source of the power MOSFET pair U7 is discharged. Is done.

As shown in FIG. 11, in the source discharge circuit 604 according to the fifth embodiment of the present invention, a pair of NPN transistors Q 12 and Q 12 ′ are connected to the source of the power MOS FET pair U 7 and control. The base of the transistor Q12 is connected to the collector of the transistor Q3, the collector of the transistor Q12 'is connected to the source of the power MOSFET pair U7, and the collector of the transistor Q12 is connected to the transistor Q12'. It is connected to the base. When the module is removed, the switch SW keeps the open state, the transistor Q3 of the control circuit 40 saturates, its collector voltage falls, the transistor Q12 turns off, the base voltage of the transistor Q12 'rises, and the transistor Q12' Is thereby conducted, and the source charge of the power MOSFET pair U7 is discharged. In addition, in this circuit, the transistor Q12 'can be replaced with one P-channel MOS FET.

FIG. 12 is a survey chart at the time of module removal in the second specific embodiment of the present invention. The lower curve shows the collector voltage of the transistor Q2, which is synchronized with the switch signal SW, and after using SCR1 as a source discharge circuit, the fall time of the module voltage is 1.13 ms (upper side). (See curve), thus quickly discharging the charge in the module.

[0040]

[Effect of the invention]

 In summary, the insertion-type electronic device that does not require a power cut when attaching or detaching the present invention reduces the inrush current during insertion because the operating current is affected by the device of the present invention when the module is inserted and removed. However, it provides an excellent effect that discharge is quickly performed at the time of extraction and spark generation is prevented, and has extremely high practicality and industrial value.

[Brief description of the drawings]

FIG. 1 is a simulation measurement diagram when a conventional insertion-type electronic device module is inserted.

FIG. 2 is a simulation measurement diagram at the time of extraction of a conventional insertion type electronic device module.

FIG. 3 is a diagram showing a time required for actual contact of pins when a conventional insertable electronic device module is inserted.

FIG. 4 is a diagram showing a time required for actually separating pins when a conventional insertion-type electronic device module is extracted.

FIG. 5 is a block diagram of one specific embodiment of the insertion type electronic device that does not require a power cut when attaching and detaching the present invention.

FIG. 6 is a detailed electric circuit diagram of the block diagram of FIG. 5;

FIG. 7 is an output voltage waveform diagram of the integrator and the comparator according to the first embodiment of the present invention;

FIG. 8 is a circuit diagram of a source discharge circuit according to another embodiment of the present invention.

FIG. 9 is a circuit diagram of a source discharge circuit according to another embodiment of the present invention.

FIG. 10 is a circuit diagram of a source discharge circuit according to another embodiment of the present invention;

FIG. 11 is a circuit diagram of a source discharge circuit according to another embodiment of the present invention;

FIG. 12 is a survey diagram at the time of module removal in the second specific embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Detector 20 Vibrator 30 Doubler circuit 40 Control circuit 50 First circuit part 502 Delay circuit 502a Integrator 502b Comparator 504 Ramp-up generating circuit 504a Inverter circuit 504b Integrating circuit 506 Output circuit 60 Second circuit part 602 Gate Discharge circuit 604 Source discharge circuit

Claims (16)

[Utility model registration claims] 1. An insertion-type electronic device which does not require a power cut when being attached / detached, comprising: a detection device for detecting insertion / removal status of a module and transmitting a corresponding control signal; The detection device, the control circuit being one control circuit, receiving the control signal described above, and adjusting an operation required by a circuit at the time of insertion and removal of the module; the one control circuit; When the module is inserted,
The first circuit part, which is controlled by the control circuit and delays the rise time of the input voltage, is regarded as one second circuit part.
The second circuit portion, which provides a path for rapidly discharging under the control of the control circuit. 2. The insertion-type electronic device according to claim 1, further comprising a vibrator and a voltage doubler circuit for providing necessary pulse signals and voltages. 3. The device according to claim 1, wherein the detection device is a switch circuit connected to the longest and shortest terminals of the module, and transmits the control signal according to the open / close state of the terminal and the corresponding terminal. An insertion-type electronic device that does not require a power cut when attaching or detaching the electronic device. 4. The method according to claim 1, wherein the first circuit portion includes a delay circuit composed of one integrator and a comparator, and a ramp-up circuit composed of another integrator and a power MOSFET. The insertion-type electronic device according to claim 1, wherein the electronic device does not need to be disconnected when being attached or detached. 5. The power supply according to claim 1, wherein the second circuit portion includes a gate discharge circuit and a source discharge circuit, and provides a discharge path to the junction capacitor of the power MOSFET when the module is removed. An insertion-type electronic device according to claim 4, which does not require a power failure when attaching and detaching. 6. The power MOS transistor according to claim 6, wherein said gate discharge circuit comprises said power MOS.
6. The insertion-type electronic device according to claim 5, wherein the device is a diode connected between the gate of the FET and the control circuit. 7. The power MOS transistor according to claim 7, wherein
6. The insertion type electronic device according to claim 5, wherein the SCR is connected between the source of the FET and the control circuit. 8. An insertion-type electronic device which does not require a power cut when being attached / detached, comprising: a switch for detecting insertion / removal status of a module and transmitting a corresponding control signal. A switch, which is one control circuit, receives the above-mentioned control signal, adjusts the operation required by the circuit for inserting and removing the module, and comprises two cascaded PNP and NPN transistors; Is connected to the base of the NPN transistor, and the collector of the NPN transistor is connected to the PN
The control circuit is connected to the base of the P transistor, the emitter of the NPN transistor is grounded, and the emitter of the PNP transistor is connected to the power supply.
A delay circuit for delaying a rise time of the input voltage under the control of the control circuit, comprising one delay circuit and a ramp-up circuit, the delay circuit being composed of a first integrator and one comparator, and a first integrator Is connected to the collector of the PNP transistor, the output of the first integrator is connected to the positive voltage input of the comparator, and the ramp-up circuit is composed of one second integrator and a power MOSFET. And the comparator of the ramp-up circuit is connected to the negative voltage input terminal of the second integrator via one inverter, and the output of the second integrator is connected to the gate of the power MOSFET. Circuit part, one second circuit part, when removing the module,
Provide a path that discharges rapidly under the control of the control circuit,
The above-mentioned second circuit portion, comprising a gate discharge circuit and a source discharge circuit. 9. The power MOS transistor according to claim 9, wherein
9. The insertion type electronic device according to claim 8, wherein a diode is connected to a gate of the FET and a collector of the NPN transistor. 10. The power discharge circuit according to claim 1, wherein
9. The insertion-type electronic device according to claim 8, wherein a diode is connected to a source of the SFET and a collector of the NPN transistor. 11. The power supply circuit according to claim 11, wherein
9. The insertion-type electronic device according to claim 8, wherein the SCR is connected to a source of the SFET and a collector of the NPN transistor. 12. The power discharge circuit according to claim 11, wherein
The PNP transistor connected to the source of the SFET and the collector of the NPN transistor, the emitter of which is connected to the source of the power MOSFET, and the base of which is connected to the collector of the NPN transistor. Insertion-type electronic device that does not require power interruption when attaching or detaching as described. 13. The power discharge circuit according to claim 1, wherein
9. A P-channel MOSFET connected to the source of the SFET and the collector of the NPN transistor, the gate of which is connected to the source of the power MOSFET, and the base of which is connected to the collector of the NPN transistor. An insertion-type electronic device that does not require a power cut when attaching or detaching the electronic device. 14. The power discharge circuit according to claim 11, wherein
First and second NPN transistors connected to the source of the SFET and the collector of the NPN transistor;
The base of the first NPN transistor is connected to the collector of the NPN transistor, and the collector of the second NPN transistor is connected to the source of the power MOSFET.
9. The insertion-type electronic device according to claim 8, wherein a collector of the N transistor is connected to a base of the second NPN transistor. 15. The insertion-type electronic device according to claim 14, wherein the first NPN transistor is replaced with a P-channel MOSFET. 16. The power discharge circuit according to claim 16, wherein
A PNP transistor and an NPN transistor are connected to the source of the SFET and the collector of the NPN transistor of the control circuit. The collector of the NPN transistor of the control circuit is connected to the base of the PNP transistor, and the collector of the PNP transistor is connected to the base of the NPN transistor. 9. The insertion type electronic device according to claim 8, wherein the insertion type electronic device is connected to the base, and the collector of the NPN transistor is connected to the source of the power MOSFET.