JPH0638498Y2 - Card receiver - Google Patents
Card receiverInfo
- Publication number
- JPH0638498Y2 JPH0638498Y2 JP426387U JP426387U JPH0638498Y2 JP H0638498 Y2 JPH0638498 Y2 JP H0638498Y2 JP 426387 U JP426387 U JP 426387U JP 426387 U JP426387 U JP 426387U JP H0638498 Y2 JPH0638498 Y2 JP H0638498Y2
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- metal plate
- receiver
- amplifier circuit
- high gain
- 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.)
- Expired - Lifetime
Links
- 239000002184 metal Substances 0.000 claims description 23
- 230000008878 coupling Effects 0.000 description 16
- 238000010168 coupling process Methods 0.000 description 16
- 238000005859 coupling reaction Methods 0.000 description 16
- 230000000694 effects Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 239000003990 capacitor Substances 0.000 description 5
- 230000035945 sensitivity Effects 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 3
- 230000010355 oscillation Effects 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 239000012212 insulator Substances 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Landscapes
- Structure Of Receivers (AREA)
- Circuits Of Receivers In General (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は、カードタイプのごとき、薄型受信機の受信回
路の特性改善に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to improvement of characteristics of a receiving circuit of a thin receiver such as a card type.
従来、フロントエンドに高利得増幅回路を有する受信
機、例えば構内用ペイジャー受信機等ではいわゆるカー
ド形状の薄型化はなされていない。Conventionally, a receiver having a high gain amplifier circuit in the front end, for example, a pager receiver for a premises, has not been made so-called a thin card shape.
薄型化のための問題点は一般に次の様なものである。即
ち、特理的な面では、 １）部品の小型，薄型化 ２）ICパッケージの薄型化 ３）電池の小型，薄型化 等であり、今日ではこれらの小型化，薄型化はかなり達
成されているといってよい。しかしながら、回路の特性
面でみると、回路の高集積化，高密度実装が行われた結
果、必ずしも従来の特性の維持できないものも出てく
る。特に、高周波回路高利得増幅回路などではその傾向
が強い。即ち、回路の高密度化によって、 ４）回路各部分の相互干渉，結合がおこる。The problems for thinning are generally as follows. In other words, from a theoretical point of view, 1) downsizing and thinning of components 2) thinning of IC package 3) downsizing and thinning of batteries, etc. Today, these downsizing and thinning have been considerably achieved. It can be said that there is. However, in terms of the characteristics of the circuit, as a result of high integration and high density mounting of the circuit, there are some that cannot always maintain the conventional characteristics. This tendency is particularly strong in high frequency circuits and high gain amplifier circuits. That is, due to the high density of the circuit, 4) mutual interference and coupling of each part of the circuit occur.
その結果、 ５）高利得増幅回路の発振 ６）高利得増幅回路の周波数特性の劣化 ７）発振回路からフロントエンドへの妨害 等が発生する。高周波では、基板に垂直にシールド板を
設けることによって各回路部分の影響をさけているが、
薄型化は困難な構造であり、又、回路相互の結合のう
ち、特に容量性の結合は、回路相互の距離によって決っ
てしまい、微小な結合を取り除くことは回路基板のみで
は困難である。As a result, 5) Oscillation of high gain amplifier circuit 6) Deterioration of frequency characteristic of high gain amplifier circuit 7) Interference from the oscillator circuit to the front end occurs. At high frequencies, the influence of each circuit part is avoided by providing a shield plate vertically to the board.
It is a difficult structure to reduce the thickness, and particularly the capacitive coupling among the circuits is determined by the distance between the circuits, and it is difficult to remove minute couplings only with the circuit board.
本考案は、以上の問題点を解決するもので、安定した高
利得増幅器を有するカード型受信機を提供するものであ
る。The present invention solves the above problems and provides a card type receiver having a stable high gain amplifier.
上記問題点を解決するために、本考案は、フロントエン
ドに高利得増幅回路を有するカード型受信機において、
前記高利得回路を備える回路基板を保持する筐体と、前
記筐体の外側上下両面に各々取り付けられた金属板と、
前記金属板同士を電気的に導通する導通素子と、一方の
電極を前記金属板に接続する内蔵電池とを備えたことを
特徴とする。In order to solve the above problems, the present invention provides a card type receiver having a high gain amplifying circuit at the front end,
A housing for holding a circuit board including the high gain circuit, and metal plates attached to both upper and lower outer surfaces of the housing,
It is characterized by comprising a conducting element for electrically conducting the metal plates to each other and a built-in battery for connecting one electrode to the metal plate.
第１図に本考案の実施例の概略断面図を示す。（ａ）図
は、１はプラスチック等の絶縁体ケース、２は１に張り
付けられた金属板、３は回路基板、４は導通素子である
導通バネ、５はボタン型電池、６は金属接片と絶縁体と
よりなる電池の他方の接点であり、図面簡略化のため特
に図示はしていないが回路基板３の所定の電極に導通す
る様にされている。７は下側のケース、８は金属板であ
る。以上の部品が図（ｂ）の様に組立てられて薄型受信
機を構成するが、電池５のプラス側電極（電極の大なる
方）と回路基板３とは、図示していない別の接触端子に
て導通がとられる様になされ、又、導通バネ４は上下金
属板２及び４に充分なバネ力で接触している。金属板は
電池のプラス電位に固定されている。FIG. 1 shows a schematic sectional view of an embodiment of the present invention. (A) In the figure, 1 is an insulating case made of plastic or the like, 2 is a metal plate attached to 1, 3 is a circuit board, 4 is a conduction spring as a conduction element, 5 is a button-type battery, and 6 is a metal contact piece. The other contact point of the battery, which is composed of an insulator and an insulator, is connected to a predetermined electrode of the circuit board 3, which is not shown in the figure for simplification of the drawing. Reference numeral 7 is a lower case, and 8 is a metal plate. The above components are assembled as shown in FIG. 3B to form a thin receiver, but the positive electrode of the battery 5 (the one with the larger electrode) and the circuit board 3 are different contact terminals not shown. The conduction spring 4 is in contact with the upper and lower metal plates 2 and 4 with a sufficient spring force. The metal plate is fixed to the positive potential of the battery.
第１図（ｃ）は、電池の極性が逆の場合の図でありこの
場合、金属板はマイナス側に固定される。FIG. 1 (c) is a diagram in the case where the polarities of the batteries are opposite, and in this case, the metal plate is fixed to the minus side.
次に上記構成の動作原理について説明する。Next, the operation principle of the above configuration will be described.
第２図は、受信回路の概略を示す。アンテナインダクタ
９と同調コンデンサ10により受信した信号を増幅回路11
にて増幅し、復調回路12で復調する。FIG. 2 shows an outline of the receiving circuit. The signal received by the antenna inductor 9 and the tuning capacitor 10 is amplified by the amplifier circuit 11
The signal is amplified by and demodulated by the demodulation circuit 12.
第３図は上記第２図の増幅回路の特性に注目した特性説
明図であって、通常、回路基板上の２点即ち、増幅回路
の入力部と出力部との間にごく小さい容量結合が生じて
いる。この結果、結合容量13は、等価的に増幅回路の出
力に対して、図（ｂ）の様にアンテナインダクタンス
９、同調コンデンサ10が15,16の様に置き換えられる。
この状態のアンプの特性は、図（ｃ）に示す様に、アン
テナの同調周波数０の近傍において、大きくレベルの
変動する特性を示す。この状態は増幅回路の利得が大き
いほどはなはだしくなり、ある利得を越えると、発振を
起こすに至る。発振状態、周波数特性劣化時には、受信
感度はいちぢるしく低下する。FIG. 3 is a characteristic explanatory diagram focusing on the characteristics of the amplifier circuit of FIG. 2 above. Normally, there is a very small capacitive coupling between two points on the circuit board, that is, between the input section and the output section of the amplifier circuit. Has occurred. As a result, the coupling capacitance 13 is equivalently replaced by the antenna inductance 9 and the tuning capacitor 10 as shown by 15 and 16 with respect to the output of the amplifier circuit as shown in FIG.
The characteristic of the amplifier in this state, as shown in FIG. 6C, shows a characteristic in which the level fluctuates greatly in the vicinity of the tuning frequency 0 of the antenna. This state becomes more severe as the gain of the amplifier circuit becomes larger, and when a certain gain is exceeded, oscillation occurs. When the oscillation condition and the frequency characteristics deteriorate, the reception sensitivity drops significantly.
第４図は本考案の実施例の動作原理概略図であり、
（ａ）図に示す金属板19は一定電位例えばグランド電位
に固定されている。実際基板上増幅回路に近接して金属
板を置くことによって、前述第３図での結合容量13は、
第４図（ａ）の17,18の２つのコンデンサに分割され
る。即ち、直接増幅回路の入出力相互の容量結合は無く
なり、図（ｂ）に示す様な容量20,21の付加された状態
となる。容量20,21は非常に小さい値なので、回路上の
影響はほとんど無い。このように本実施例の様に構成さ
れた薄型受信機の増幅回路の周波数特性を図（ｃ）に示
す。増幅回路の入出力の結合による周波数特性の劣化は
なくなり、良好な特性を得ることができる。また、回路
間同士の結合についても同じ動作原理により小さくでき
る。FIG. 4 is a schematic view of the operation principle of the embodiment of the present invention.
The metal plate 19 shown in (a) is fixed at a constant potential, for example, the ground potential. By actually placing a metal plate close to the amplifier circuit on the substrate, the coupling capacitance 13 in FIG.
It is divided into two capacitors 17 and 18 in FIG. That is, the capacitive coupling between the input and output of the direct amplifier circuit is eliminated, and the capacitors 20 and 21 are added as shown in FIG. Since the capacitances 20 and 21 are very small, there is almost no effect on the circuit. The frequency characteristic of the amplifier circuit of the thin receiver configured as in this embodiment is shown in FIG. The deterioration of the frequency characteristics due to the coupling of the input and output of the amplifier circuit is eliminated, and good characteristics can be obtained. Also, the coupling between circuits can be reduced by the same operating principle.
以上述べた様に、本考案によると次の様な効果を上げる
ことができる。即ち、 １）増幅回路の高利得、高安定化が可能となりこの結
果、受信感度が向上する。例えばアンテナインダクタを
用いた構内用ペイジャーについては本考案の構成をとる
ことによって、受信感度において、約10dBもの改善をは
かることができる。As described above, according to the present invention, the following effects can be obtained. That is, 1) High gain and high stability of the amplifier circuit are possible, and as a result, the receiving sensitivity is improved. For example, with regard to a premises pager using an antenna inductor, by adopting the configuration of the present invention, the receiving sensitivity can be improved by about 10 dB.
（第３図（ｅ）と第４図（ｃ）との比較） 増幅回路の安定化によって、従来より高利得化が可能と
なり、さらに感度を向上させることもできる。(Comparison between FIG. 3 (e) and FIG. 4 (c)) By stabilizing the amplifier circuit, it is possible to achieve a higher gain than before and further improve the sensitivity.
２）金属板がケースの外側にあって回路基板に直接接す
ることがないので、ショートの危険はない。2) Since the metal plate is outside the case and does not come into direct contact with the circuit board, there is no risk of short circuit.
３）基板を金属板でおおっているので、静電耐圧が向上
する。ことに、電池電極に直接接しているので、静電気
による電荷は、基板に直接影響を与えなくなる。3) Since the substrate is covered with the metal plate, the electrostatic breakdown voltage is improved. In particular, since it is in direct contact with the battery electrode, the charge due to static electricity does not directly affect the substrate.
４）図４の本考案の実施例の動作原理概略図において述
べた様な増幅回路の入出力相互の容量結合がなくなるの
みならず、他の回路との結合に関しても小さくできるの
で、さらに高密度の実装が可能となり、いっそう小型，
薄型化が可能となる。特に、高利得増幅回路を有する受
信機では、回路間の結合を小さくして高密度実装するこ
とは困難なので、効果が大である。4) In addition to eliminating the capacitive coupling between the input and output of the amplifier circuit as described in the schematic diagram of the operation principle of the embodiment of the present invention in FIG. 4, it is possible to reduce the coupling with other circuits. It becomes possible to implement
Thinning is possible. In particular, in a receiver having a high gain amplifier circuit, it is difficult to reduce the coupling between the circuits and to implement high density implementation, so that the effect is great.
５）金属板が上下２枚なので、結合阻止の効果があが
る。又、片側に仮りにはがれ等が生じても特性劣化が小
さくてすむ。5) Since there are two metal plates at the top and bottom, the effect of preventing coupling is improved. Further, even if peeling occurs on one side, the characteristic deterioration is small.
以上、本考案のカード型受信機は、筐体の外側上下両面
に各々取り付けられた金属板と、前記金属板同士を電気
的に導通する導通素子と、一方の電極を前記金属板に接
続する内蔵電池とを備えたため、高い受信特性を実現し
たカード型受信機を提供できるという効果を有する。As described above, the card-type receiver of the present invention connects the metal plates respectively mounted on the upper and lower outer surfaces of the housing, the conductive element electrically connecting the metal plates to each other, and one electrode connected to the metal plate. Since it has a built-in battery, there is an effect that it is possible to provide a card type receiver that realizes high reception characteristics.
【図面の簡単な説明】 第１図（ａ）〜（ｃ）は、本考案による受信機の実施例
を示す構成概略図。 １……絶縁ケース ２……金属板 ３……回路基板 ４……導通バネ ５……電池 ６……電池の接点素子 ７……ケース ８……金属板 第２図は、本考案による受信機の回路略図。 ９……アンテナインダクタ 10……同調コンデンサ 11……増幅回路 12……復調回路 第３図（ａ）〜（ｃ）は、従来構成での特性説明図。 13……結合容量 14……等価結合容量 15……等価インダクタンス 16……等価容量０ ……同調周波数 第４図（ａ）〜（ｃ）は本考案による受信機の特性説明
図。 17,18……結合容量 19……金属板 20,21……等価容量BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1A to 1C are schematic configuration diagrams showing an embodiment of a receiver according to the present invention. 1 ... Insulation case 2 ... Metal plate 3 ... Circuit board 4 ... Conduction spring 5 ... Battery 6 ... Battery contact element 7 ... Case 8 ... Metal plate Fig. 2 shows the receiver according to the present invention. Schematic diagram of. 9 ... Antenna inductor 10 ... Tuning capacitor 11 ... Amplification circuit 12 ... Demodulation circuit FIGS. 3 (a) to 3 (c) are characteristic explanatory views in the conventional configuration. 13 …… Coupling capacitance 14 …… Equivalent coupling capacitance 15 …… Equivalent inductance 16 …… Equivalent capacitance 0 …… Tuning frequency FIGS. 4 (a) to 4 (c) are characteristic diagrams of the receiver according to the present invention. 17,18 …… Coupling capacity 19 …… Metal plate 20,21 …… Equivalent capacity
Claims (1)
カード型受信機において、 前記高利得回路を備える回路基板を保持する筐体と、 前記筐体の外側上下両面に各々取り付けられた金属板
と、 前記金属板同士を電気的に導通する導通素子と、 一方の電極を前記金属板に接続した内蔵電池とを備えた
ことを特徴とするカード型受信機。1. A card type receiver having a high gain amplifying circuit at a front end, comprising: a casing for holding a circuit board having the high gain circuit; and metal plates attached to upper and lower outer surfaces of the casing, respectively. A card-type receiver, comprising: a conductive element that electrically connects the metal plates to each other; and a built-in battery in which one electrode is connected to the metal plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP426387U JPH0638498Y2 (en) | 1987-01-14 | 1987-01-14 | Card receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP426387U JPH0638498Y2 (en) | 1987-01-14 | 1987-01-14 | Card receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63113334U JPS63113334U (en) | 1988-07-21 |
| JPH0638498Y2 true JPH0638498Y2 (en) | 1994-10-05 |
Family
ID=30784769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP426387U Expired - Lifetime JPH0638498Y2 (en) | 1987-01-14 | 1987-01-14 | Card receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0638498Y2 (en) |
-
1987
- 1987-01-14 JP JP426387U patent/JPH0638498Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63113334U (en) | 1988-07-21 |
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