KR20080085594A - Reset circuit of integrated circuit - Google Patents

Reset circuit of integrated circuit Download PDF

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Publication number
KR20080085594A
KR20080085594A KR1020070027331A KR20070027331A KR20080085594A KR 20080085594 A KR20080085594 A KR 20080085594A KR 1020070027331 A KR1020070027331 A KR 1020070027331A KR 20070027331 A KR20070027331 A KR 20070027331A KR 20080085594 A KR20080085594 A KR 20080085594A
Authority
KR
South Korea
Prior art keywords
switching
resistor
unit
port
reset circuit
Prior art date
Application number
KR1020070027331A
Other languages
Korean (ko)
Inventor
이우석
Original Assignee
엘지이노텍 주식회사
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by 엘지이노텍 주식회사 filed Critical 엘지이노텍 주식회사
Priority to KR1020070027331A priority Critical patent/KR20080085594A/en
Publication of KR20080085594A publication Critical patent/KR20080085594A/en

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
    • H02H9/00—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection
    • H02H9/04—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage
    • H02H9/045—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage adapted to a particular application and not provided for elsewhere
    • H02H9/046—Emergency protective circuit arrangements for limiting excess current or voltage without disconnection responsive to excess voltage adapted to a particular application and not provided for elsewhere responsive to excess voltage appearing at terminals of integrated circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
    • H03K17/081—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit
    • H03K17/0812—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit by measures taken in the control circuit
    • H03K17/08122—Modifications for protecting switching circuit against overcurrent or overvoltage without feedback from the output circuit to the control circuit by measures taken in the control circuit in field-effect transistor switches
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices

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  • Engineering & Computer Science (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Electronic Switches (AREA)

Abstract

A reset circuit of an integrated circuit is provided to increase electrostatic discharge immunity by removing static electricity generated in the inside. A first filter part(100) is connected to a reset port. A driving part(200) is connected to the first filter part. A second filter part(300) is connected to the driving part and an IC port. The second filter part includes more than one switching resistor, a switching capacitor and a switching part. The switching resistor is connected to the IC port, and has a connection port. One end of the switching capacitor is connected between the switching resistor and the IC port, and the other end is grounded. One end of the switching part is connected to the buffer, and the other end is connected to one connection port of the switching resistor.

Description

IC's reset circuit {Reset circuit of Integrated Circuit}

1 is a circuit diagram showing a reset circuit of a conventional IC.

2 is a circuit diagram illustrating a reset circuit of an IC according to an exemplary embodiment of the present invention.

* Description of the symbols for the main parts of the drawings *

100 First filter part 200 Drive part

300 second filter part

The present invention relates to a reset circuit of an IC.

1 is a circuit diagram showing a reset circuit of a conventional IC. The reset circuit of the conventional IC is composed of the first filter unit 100 and the driving unit 200.

As shown in FIG. 1, in a reset circuit of a conventional IC, the first filter unit 100 may include a first resistor R1 having one side connected to a reset terminal and a first resistor connected to the other side of the first resistor R1. Inductance (L1), one side is connected between the first inductance (L1) and the driving unit 200, the other side is the first capacitor (C1) is connected to the ground, one side is the first inductance (L1) and the driving unit 200 The second resistor C2 connected between the second capacitor C2 and the other side is connected to the ground, and the other side is connected between the first inductance L1 and the driving unit 200, and the other side is connected to the ground. Is done.

The driving unit 200 is a buffer B1 for buffering and outputting a signal, a driving voltage is input to a drain, a driving voltage is input to a gate, and a source is connected between the first filter unit 100 and the buffer B1. P-channel MOSFET (Q1), the drain is connected between the first filter unit 100 and the buffer (B1), N-channel MOSFET (Q2), the source is connected to the ground, the gate is connected to the ground, one side The third resistor R3 is connected between the P-channel MOSFET Q1 and the N-channel MOSFET Q2 and the other side is connected to the buffer B1.

Meanwhile, in the IC, electrostatic discharge (ESD) may be generated. However, in the reset circuit of the conventional IC, the static electricity generated from the outside may be removed by the first filter unit 100, but the static electricity generated from the inside may not be removed.

The present invention provides a reset circuit of an IC that removes static electricity generated therein to enhance static resistance.

The present invention relates to a reset circuit of an IC.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals have the same reference numerals as much as possible even if displayed on different drawings. In describing the present invention, when it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

2 is a circuit diagram illustrating a reset circuit of an IC according to an exemplary embodiment of the present invention. The reset circuit of the IC includes the first filter unit 100, the driver 200, and the second filter unit 300.

The first filter unit 100 may include a first resistor R1 having one side connected to a reset terminal, a first inductance L1 having one side connected to the other side of the first resistor R1, and one side having a first inductance ( It is connected between the other side of the L1 and the driving unit 200, the other side is connected to the ground of the first capacitor (C1), one side is connected between the other side of the first inductance (L1) and the driving unit 200, the other side The second capacitor C2 connected to the ground, one side of which is connected between the other side of the first inductance L1 and the driving unit 200, and the other side includes a second resistor R2 that is connected to the ground.

The driving unit 200 is a buffer B1 for buffering and outputting a signal, a driving voltage is input to a drain, a driving voltage is input to a gate, and a source is connected between the first filter unit 100 and the third resistor R3. P-channel MOSFET Q1 connected to the N-channel MOSFET having a drain connected between the first filter unit 100 and the third resistor R3, a source connected to ground, and a gate connected to ground. Q2), one side includes a third resistor R3 connected to the source of the P-channel MOSFET Q1 and the source of the N-channel MOSFET Q2, and the other to the input terminal of the buffer B1.

The second filter unit 300 has one side connected to the IC port, the other side is a switching resistor (R4 ~ R9) consisting of a connection terminal, one side is connected between one side of each of the switching resistor and the IC port and the other side is connected to the ground Switching capacitors C3 to C8, one side of which is connected to the buffer B1, and the other side of the switching unit SW having a structure to be connected to one of the connection terminals of the switching resistors R4 to R9. It includes.

In the present invention, the number of switching resistors and switching capacitors may be variously implemented according to embodiments. That is, various numbers of switching resistors and switching capacitors can be designed according to the characteristics and structure of the IC. In the embodiment of FIG. 2, six switching resistors and switching capacitors are used.

In one embodiment of the present invention to control the switching unit SW to be connected by selecting one of the connection terminals of the switching resistors (R4 ~ R9) by using the output signal of the register for controlling the switching unit (SW). Can be. The register used in the present invention is a register newly added to the IC for controlling the switching unit SW.

The switching resistors R4 to R9 and the switching capacitors C3 to C8 having capacities suitable for static electricity reduction are connected to each other according to the voltage of the static electricity generated in one embodiment of the present invention. For example, in FIG. 2, R4 and C3 are the first route, R5 and C4 are the second route, R6 and C5 are the third route, R7 and C6 are the fourth route, and R8 and C7 are the fifth route, R9 and C8. This sixth path is constructed. Each path has different impedance values. In this case, the switching resistor and the capacitance of the switching capacitor used are preferably values that are optimized to best remove the static electricity according to the voltage of each static electricity based on experimental data. In general, since static electricity is characterized by instantaneous high voltage, the present invention is designed to properly filter the static electricity by combining the values of the switching resistor and the switching capacitor.

In the present invention, the IC allows a signal to be output from the resistor to be connected to a path suitable for the voltage of the generated static electricity. That is, the signal output from the resistor is a signal for controlling the switching unit SW to be connected by selecting the connection terminal of the switching resistors R4 to R9 to be connected to a path suitable for the generated static voltage.

While the invention has been described using some preferred embodiments, these embodiments are illustrative and not restrictive. Those skilled in the art will appreciate that various changes and modifications can be made without departing from the spirit of the invention and the scope of the rights set forth in the appended claims.

As described above, according to the present invention, the electrostatic resistance of the IC circuit can be enhanced by removing the static electricity generated therein by using the switching unit.

Claims (4)

A first filter part connected to the reset terminal; A driving unit connected to the first filter unit; A second filter part connected to the driving part and the IC port; Reset circuit of the IC comprising a. The method of claim 1, wherein the second filter unit One side is connected to the IC port, and the other side comprises one or more switching resistors; A switching capacitor having one side connected between one side of each of the switching resistors and an IC port and the other side connected to ground; One side is connected to the buffer, the other side is a switching unit is configured to be connected to one of the connection terminals of the switching resistor Reset circuit of the IC comprising a. The method of claim 2, And resetting the switching unit so as to select and connect one connection terminal among the connection terminals of the switching resistor by using an output signal of a register for controlling the switching unit. The method according to claim 2 or 3, The switching unit constitutes each path by connecting a switching resistor and a switching capacitor having a capacity suitable for reducing static electricity according to the generated static electricity voltage. And the output signal outputted from the register is a signal for controlling the switching unit to be connected by selecting a connection terminal of a switching resistor which is connected to a path suitable for the generated static voltage.
KR1020070027331A 2007-03-20 2007-03-20 Reset circuit of integrated circuit KR20080085594A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020070027331A KR20080085594A (en) 2007-03-20 2007-03-20 Reset circuit of integrated circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020070027331A KR20080085594A (en) 2007-03-20 2007-03-20 Reset circuit of integrated circuit

Publications (1)

Publication Number Publication Date
KR20080085594A true KR20080085594A (en) 2008-09-24

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ID=40025290

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020070027331A KR20080085594A (en) 2007-03-20 2007-03-20 Reset circuit of integrated circuit

Country Status (1)

Country Link
KR (1) KR20080085594A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103023154A (en) * 2011-09-22 2013-04-03 冠捷投资有限公司 Electronic device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103023154A (en) * 2011-09-22 2013-04-03 冠捷投资有限公司 Electronic device

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