KR20010108886A - designing method of ground line - Google Patents

designing method of ground line Download PDF

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Publication number
KR20010108886A
KR20010108886A KR1020000029889A KR20000029889A KR20010108886A KR 20010108886 A KR20010108886 A KR 20010108886A KR 1020000029889 A KR1020000029889 A KR 1020000029889A KR 20000029889 A KR20000029889 A KR 20000029889A KR 20010108886 A KR20010108886 A KR 20010108886A
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KR
South Korea
Prior art keywords
digital
analog
analog circuit
ground terminal
circuit
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Application number
KR1020000029889A
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Korean (ko)
Inventor
최영철
Original Assignee
박종섭
주식회사 하이닉스반도체
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Application filed by 박종섭, 주식회사 하이닉스반도체 filed Critical 박종섭
Priority to KR1020000029889A priority Critical patent/KR20010108886A/en
Publication of KR20010108886A publication Critical patent/KR20010108886A/en

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01LSEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/02Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components specially adapted for rectifying, oscillating, amplifying or switching and having at least one potential-jump barrier or surface barrier; including integrated passive circuit elements with at least one potential-jump barrier or surface barrier
    • H01L27/0203Particular design considerations for integrated circuits

Abstract

본 발명은 디지털/아날로그 혼재회로의 그라운드라인 설계방법에 관한 것으로, 포토커플러를 이용하여 디지털회로부의 그라운드 단자와 아날로그회로부의 그라운드 단자사이를 접속하는 것에 의해, 양 단자사이를 물리적으로 분리하여 설계함으로써, 디지털 회로부로부터의 노이즈가 아날로그 회로부에 영향을 미치는 것을 방지하도록 한 디지털/아날로그 혼재회로의 그라운드라인 설계방법을 고안한 것이다.The present invention relates to a method for designing a ground line of a mixed digital / analog circuit. By connecting a ground terminal of a digital circuit portion and a ground terminal of an analog circuit portion using a photocoupler, the physical separation between the two terminals is performed. In addition, the ground-line design method of the mixed digital / analog circuit is designed to prevent noise from the digital circuit portion from affecting the analog circuit portion.

Description

그라운드라인 설계방법{designing method of ground line}Grounding line design method

본 발명은 디지털/아날로그 혼재회로의 그라운드라인 설계방법에 관한 것으로, 특히 디지털회로부의 그라운드 단자와 아날로그회로부의 그라운드 단자사이를 물리적으로 분리하여 설계함으로써, 디지털회로부로부터의 노이즈가 아날로그회로부에 영향을 미치는 것을 방지하도록 한 디지털/아날로그 혼재회로의 그라운드라인 설계방법에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ground line design method of a mixed digital / analog circuit, and in particular, by designing a physical separation between the ground terminal of the digital circuit section and the ground terminal of the analog circuit section, the noise from the digital circuit section affects the analog circuit section. A ground line design method of a mixed digital / analog circuit is provided.

도 1에 나타낸 바와 같이, 통상적으로 아날로그회로와 디지털회로가 혼재하는 경우, 디지털회로의 스위칭노이즈가 아날로그회로에 영향을 미치지 않도록 아날로그회로와 디지털회로의 그라운드 단자는 서로 이격하여 위치하고, 양 그라운드 단자는 도전성 패턴에 의해 연결되는 구성으로 되어 있다. 그러나 상기 도전성 패턴에 의한 접속방식은 디지털회로에서 발생하는 노이즈를 충분히 차단하기에는 부족하여, 실질적으로 양 그라운드 단자는 직접적으로 연결되어 있는 것으로 볼 수 있다. 즉, 상기 그라운드 단자들간에는 도전성 연결패턴을 통해 전류가 흐르게 되고, 이로 인해 디지털회로의 노이즈가 그라운드 라인을 통해 아날로그 회로에 영향을 미쳐 회로의 성능에 손상을 주게 되는 문제점이 있다.As shown in FIG. 1, in general, when analog circuits and digital circuits are mixed, the ground terminals of the analog circuit and the digital circuit are located apart from each other so that the switching noise of the digital circuit does not affect the analog circuit. It is a structure connected by the conductive pattern. However, the connection method by the conductive pattern is insufficient to sufficiently block the noise generated in the digital circuit, so that both ground terminals can be regarded as being directly connected. That is, current flows through the conductive connection patterns between the ground terminals, which causes noise of the digital circuit to affect the analog circuit through the ground line, thereby damaging the performance of the circuit.

본 발명의 목적은 상기한 문제점을 해결하기 위한 것으로서, 포토커플러를 이용하여 디지털 회로부의 그라운드 단자와 아날로그 회로부의 그라운드 단자사이를 물리적으로 분리하여 설계함으로써, 디지털 회로부로부터의 노이즈가 아날로그 회로부에 영향을 미치는 것을 방지하도록 한 디지털/아날로그 혼재회로에서의 그라운드라인의 설계방법을 제공하는 것에 있다.An object of the present invention is to solve the above problems, by using a photocoupler to physically separate between the ground terminal of the digital circuit portion and the ground terminal of the analog circuit portion, the noise from the digital circuit portion affects the analog circuit portion It is an object of the present invention to provide a method for designing a ground line in a mixed digital / analog circuit to prevent an impact.

도 1은 종래의 디지털/아날로그 혼재회로에 있어서 각 그라운드 단자가 접속된 상태를 나타내는 도면,1 is a view showing a state in which each ground terminal is connected in a conventional digital / analog mixed circuit;

도 2는 본 발명에 의하여 디지털회로의 그라운드 단자와 아날로그회로의 그라운드 단자가 접속된 상태를 나타내는 블럭도,2 is a block diagram showing a state in which a ground terminal of a digital circuit and a ground terminal of an analog circuit are connected according to the present invention;

도 3은 본 발명의 실시예에 의한 디지털/아날로그 혼재회로에서의 각 그라운드 단자의 접속상태를 나타내는 도면이다.3 is a diagram showing a connection state of each ground terminal in a mixed digital / analog circuit according to an embodiment of the present invention.

상기 목적을 달성하기 위하여, 본 발명의 디지털/아날로그 혼재회로의 그라운드라인 설계방법은 아날로그회로부의 그라운드 단자와 디지털회로부의 그라운드 단자를 포토커플러(photocoupler)로 연결하는 것을 특징으로 하고 있다.In order to achieve the above object, the ground line design method of the mixed digital / analog circuit of the present invention is characterized by connecting the ground terminal of the analog circuit portion and the ground terminal of the digital circuit portion with a photocoupler (photocoupler).

본 발명의 다른 특징 및 이점들은 첨부도면에 의거한 다음의 설명으로 더욱 명백해진다.Other features and advantages of the present invention will become more apparent from the following description based on the accompanying drawings.

도 2에 나타낸 바와 같이, 본 발명의 그라운드라인 설계방법을 적용하여 디지털/아날로그 혼재회로를 구성하면, 디지털회로부의 그라운드 단자(100)와 아날로그회로부의 그라운드 단자(200)는 그 사이에 포토커플러(300)를 개재시켜 상호 접속된다. 이와 같은 구성에 의해 아날로그회로부와 디지털회로부간의 신호의 송수신은, 전기신호를 발광다이오드에 의해 광신호로 변환하여 송신하고, 수신한 광신호를 포토트랜지스터에 의해 전기신호로 복원하도록 동작하는 포토커플러를 통하여 이루어진다. 즉 디지털회로부와 아날로그회로부 사이의 신호는 빛의 형태로 전송되므로 아날로그회로의 그라운드 단자와 디지털회로의 그라운드 단자는 실질적으로 전기적으로 절연된 상태가 되어, 양 회로간의 노이즈 간섭을 줄일 수 있게 된다.As shown in FIG. 2, when the digital / analog mixed circuit is configured by applying the ground line designing method of the present invention, the ground terminal 100 of the digital circuit portion and the ground terminal 200 of the analog circuit portion are provided with a photocoupler (between). Interconnected via 300). The transmission and reception of the signal between the analog circuit unit and the digital circuit unit by such a configuration converts the electrical signal into an optical signal by the light emitting diode and transmits the optical signal, and a photocoupler operable to restore the received optical signal to the electrical signal by the phototransistor. Is done through. That is, since the signal between the digital circuit portion and the analog circuit portion is transmitted in the form of light, the ground terminal of the analog circuit and the ground terminal of the digital circuit are substantially electrically insulated, thereby reducing noise interference between both circuits.

도 3은 본 발명의 일실시예에 의해 아날로그회로부와 디지털회로부의 그라운드 단자가 포토커플러를 통해 상호 연결된 상태를 나타낸 도면으로서, 도 3에서와 같이 본 발명은 모니터를 구성하는 MCU(Monitor Control Unit)부(100)의 디지털회로와 기타 아날로그회로(200)간의 그라운드라인 설계에 적용될 수 있다.FIG. 3 is a diagram illustrating a state in which the analog terminals and the ground terminals of the digital circuit unit are connected to each other through a photocoupler according to an embodiment of the present invention. As shown in FIG. 3, the present invention is a MCU (Monitor Control Unit) constituting a monitor. It can be applied to the ground line design between the digital circuit of the unit 100 and the other analog circuit 200.

상기한 본 발명의 구성에 의하면, 아날로그회로부의 그라운드 단자와 디지털회로부의 그라운드 단자를 포토커플러를 개재시켜 연결함으로써, 양 단자사이를 물리적으로 분리하여 설계할 수 있게 되어, 디지털 회로부로부터의 노이즈가 아날로그 회로부에 영향을 미치는 것을 방지할 수 있게 된다는 이점이 있다.According to the configuration of the present invention described above, by connecting the ground terminal of the analog circuit portion and the ground terminal of the digital circuit portion via a photocoupler, it is possible to design physically separated between the two terminals, the noise from the digital circuit portion is analog There is an advantage that the influence on the circuit portion can be prevented.

Claims (2)

디지털/아날로그 혼재회로에 있어서,In the digital / analog mixed circuit, 아날로그회로부의 그라운드 단자와 디지털회로부의 그라운드 단자를 포토커플러로 연결하는 것을 특징으로 하는 디지털/아날로그 혼재회로의 그라운드라인 설계방법.A ground line design method for a mixed digital / analog circuit, comprising connecting a ground terminal of an analog circuit unit to a ground terminal of a digital circuit unit using a photocoupler. 제 1 항에 있어서,The method of claim 1, 상기 디지털 회로부는 모니터의 MCU부의 디지털 회로를 포함하는 것을 특징으로 하는 디지털/아날로그 혼재회로의 그라운드라인 설계방법.And the digital circuit unit comprises a digital circuit of the MCU unit of the monitor.
KR1020000029889A 2000-06-01 2000-06-01 designing method of ground line KR20010108886A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030049919A (en) * 2001-12-17 2003-06-25 엘지전자 주식회사 Electro Magnetic Wave Reducing Circuit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20030049919A (en) * 2001-12-17 2003-06-25 엘지전자 주식회사 Electro Magnetic Wave Reducing Circuit

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