JPS6444800U - - Google Patents
Info
- Publication number
- JPS6444800U JPS6444800U JP13898187U JP13898187U JPS6444800U JP S6444800 U JPS6444800 U JP S6444800U JP 13898187 U JP13898187 U JP 13898187U JP 13898187 U JP13898187 U JP 13898187U JP S6444800 U JPS6444800 U JP S6444800U
- Authority
- JP
- Japan
- Prior art keywords
- electrode
- field effect
- effect transistor
- fixed electrode
- junction field
- 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.)
- Pending
Links
- 230000005669 field effect Effects 0.000 claims description 4
- 239000003990 capacitor Substances 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
Landscapes
- Electrostatic, Electromagnetic, Magneto- Strictive, And Variable-Resistance Transducers (AREA)
Description
第１図ａおよびｂは本考案の一実施例を示すコ
ンデンサ・マイクロホンの音響―電気変換部の断
面図およびその電気接続回路図、第２図は上記実
施例におけるソースおよびドレインの各引出リー
ドの形状を明らかにするジヤンクシヨン形電界効
果トランジスタの平面図である。
１……コンデンサの振動電極、２……コンデン
サの固定電極、３……ジヤンクシヨン形電界効果
トランジスタペレツト、４……金属筐体、５……
絶縁膜、６……ソース引き出しリード、７……ド
レイン引き出しリード、８……ボンデイング線、
９……モールド樹脂、１０……絶縁性ワツシヤ、
１１……金属性ワツシヤ、１２……空気抜き穴。
Figures 1a and b are cross-sectional views of the acoustic-to-electrical converter section of a condenser microphone showing an embodiment of the present invention and its electrical connection circuit diagram, and Figure 2 is a diagram of the source and drain lead leads in the above embodiment. FIG. 2 is a plan view of a junction field effect transistor to clarify its shape. DESCRIPTION OF SYMBOLS 1... Vibrating electrode of a capacitor, 2... Fixed electrode of a capacitor, 3... Junction type field effect transistor pellet, 4... Metal casing, 5...
Insulating film, 6... Source lead lead, 7... Drain lead lead, 8... Bonding line,
9...Mold resin, 10...Insulating washer,
11...Metallic washer, 12...Air vent hole.
Claims (1)
動電極と前記振動電極に対向する固定電極とを有
するコンデンサ部と前記固定電極にゲート電極を
電気接続するジヤンクシヨン形電界効果トランジ
スタとから成り、前記コンデンサの固定電極は前
記ジヤンクシヨン形電界効果トランジスタのゲー
ト電極面と一体化されトランジスタの外形フレー
ムの一部を成すよう配置されることを特徴とする
コンデンサ・マイクロホン。 The acoustic-to-electric conversion section includes a capacitor section having a vibrating electrode that vibrates in response to acoustic input and a fixed electrode facing the vibrating electrode, and a junction field effect transistor having a gate electrode electrically connected to the fixed electrode. A condenser microphone characterized in that the fixed electrode is arranged so as to be integrated with the gate electrode surface of the junction field effect transistor and form a part of the external frame of the transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13898187U JPS6444800U (en) | 1987-09-10 | 1987-09-10 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13898187U JPS6444800U (en) | 1987-09-10 | 1987-09-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6444800U true JPS6444800U (en) | 1989-03-17 |
Family
ID=31401816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13898187U Pending JPS6444800U (en) | 1987-09-10 | 1987-09-10 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6444800U (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5552698A (en) * | 1978-10-13 | 1980-04-17 | Nec Corp | Electret capacitor type mike-use field effect transistor |
| JPS627300A (en) * | 1985-07-03 | 1987-01-14 | Matsushita Electric Ind Co Ltd | Electret capacitor microphone |
-
1987
- 1987-09-10 JP JP13898187U patent/JPS6444800U/ja active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5552698A (en) * | 1978-10-13 | 1980-04-17 | Nec Corp | Electret capacitor type mike-use field effect transistor |
| JPS627300A (en) * | 1985-07-03 | 1987-01-14 | Matsushita Electric Ind Co Ltd | Electret capacitor microphone |
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