JPS6262450U - - Google Patents
Info
- Publication number
- JPS6262450U JPS6262450U JP15510385U JP15510385U JPS6262450U JP S6262450 U JPS6262450 U JP S6262450U JP 15510385 U JP15510385 U JP 15510385U JP 15510385 U JP15510385 U JP 15510385U JP S6262450 U JPS6262450 U JP S6262450U
- Authority
- JP
- Japan
- Prior art keywords
- input
- series resistor
- complementary transistor
- protection circuit
- node
- 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
- 238000009792 diffusion process Methods 0.000 claims description 3
- 230000000295 complement effect Effects 0.000 claims 2
- 239000012535 impurity Substances 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 1
- 229910021420 polycrystalline silicon Inorganic materials 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Landscapes
- Metal-Oxide And Bipolar Metal-Oxide Semiconductor Integrated Circuits (AREA)
Description
第１図は本考案の一実施例の要部平面図、第２
図は第１図に示す入力保護回路のＡ―Ａ′線断面
図、第３図は第１図に示す入力保護回路の等価回
路図、第４図は従来の入力保護回路の一例の要部
平面図、第５図は第４図に示す入力保護回路のＢ
―Ｂ′線断面図、第６図は第４図に示す入力保護
回路の等価回路図である。
１……Ｐ型半導体基板、２，２′，２″，２
……金属配線、３……多結晶シリコン層、４，４
′……Ｐ＋拡散層、５，５′……Ｎ＋拡散層、６
……酸化膜、７，７′，７″……コンタクト、８
……Ｎウエル。
Figure 1 is a plan view of essential parts of an embodiment of the present invention;
The figure is a sectional view taken along line A-A' of the input protection circuit shown in Fig. 1, Fig. 3 is an equivalent circuit diagram of the input protection circuit shown in Fig. 1, and Fig. 4 is the main part of an example of a conventional input protection circuit. The plan view, Figure 5, is B of the input protection circuit shown in Figure 4.
6 is an equivalent circuit diagram of the input protection circuit shown in FIG. 4. 1...P-type semiconductor substrate, 2, 2', 2'', 2
... Metal wiring, 3 ... Polycrystalline silicon layer, 4, 4
'...P + diffusion layer, 5, 5'...N + diffusion layer, 6
...Oxide film, 7,7',7''...Contact, 8
...N-well.
Claims (1)
れる直列抵抗と、該直列抵抗と前記相補型トラン
ジスタとを接続する節点にそれぞれカソード及び
アノードが接続される第１及び第２のダイオード
とを備える入力保護回路において、前記節点に接
続する前記第１及び第２のダイオードの不純物拡
散層を環状にしたことを特徴とする入力保護回路
。 An input comprising a series resistor inserted between a complementary transistor and an input terminal, and first and second diodes whose cathodes and anodes are respectively connected to a node connecting the series resistor and the complementary transistor. An input protection circuit characterized in that impurity diffusion layers of the first and second diodes connected to the node are ring-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985155103U JPH0525250Y2 (en) | 1985-10-08 | 1985-10-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1985155103U JPH0525250Y2 (en) | 1985-10-08 | 1985-10-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6262450U true JPS6262450U (en) | 1987-04-17 |
| JPH0525250Y2 JPH0525250Y2 (en) | 1993-06-25 |
Family
ID=31075503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1985155103U Expired - Lifetime JPH0525250Y2 (en) | 1985-10-08 | 1985-10-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0525250Y2 (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4830189A (en) * | 1971-08-19 | 1973-04-20 | ||
| JPS5868043U (en) * | 1981-11-02 | 1983-05-09 | 日産自動車株式会社 | Input protection device for semiconductor devices |
| JPS5886773A (en) * | 1981-11-19 | 1983-05-24 | Nec Corp | Output protecting circuit |
-
1985
- 1985-10-08 JP JP1985155103U patent/JPH0525250Y2/ja not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4830189A (en) * | 1971-08-19 | 1973-04-20 | ||
| JPS5868043U (en) * | 1981-11-02 | 1983-05-09 | 日産自動車株式会社 | Input protection device for semiconductor devices |
| JPS5886773A (en) * | 1981-11-19 | 1983-05-24 | Nec Corp | Output protecting circuit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0525250Y2 (en) | 1993-06-25 |
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