JPH0264722A - Memory card - Google Patents

Memory card

Info

Publication number
JPH0264722A
JPH0264722A JP63217111A JP21711188A JPH0264722A JP H0264722 A JPH0264722 A JP H0264722A JP 63217111 A JP63217111 A JP 63217111A JP 21711188 A JP21711188 A JP 21711188A JP H0264722 A JPH0264722 A JP H0264722A
Authority
JP
Japan
Prior art keywords
battery
memory card
external
capacity
life
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
Application number
JP63217111A
Other languages
Japanese (ja)
Inventor
Masatoshi Kimura
正俊 木村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP63217111A priority Critical patent/JPH0264722A/en
Publication of JPH0264722A publication Critical patent/JPH0264722A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To fit an large-capacity external battery on the side of a terminal unit and to lengthen the life of batteries inside a memory card by connecting a protective diode for external connection and a protective resistance for external connection in series to the connector of the memory card. CONSTITUTION:In the internal circuit of the memory card, a protective diode 12 for external connection and a protective resistance 13 for external connection are connected in series to connector of the memory card so that a large-capacity external battery 14 can be connected on the side of the terminal unit in addition to a conventional battery circuit. Generally, the equivalent internal resistance of a battery 5 and the battery 14 is much smaller than a protective resistance 4 and a resistance 13 and therefore, battery capacity can be shown by the sum of the battery 5 and the battery 14. Consequently, when, for example, the battery capacity of the battery 5 is 165mAH and a supply current Isb is 17muA (a ambient temperature is 25 deg.C), when a battery whose capacity is 2,000mAH is mounted as the battery 15, when the ambient temperature is 20 deg.C, the life of the batteries is 14.5 years and is 10 times or above as long as that of only the battery 5. Thus, the life of the batteries inside the memory card can be lengthened.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 コノ発明はメモリカードの電池寿命を長くスル手段に関
するものである。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a means for extending the battery life of a memory card.

〔従来の技術〕[Conventional technology]

第4図は従来のメモリカードの電池回路を示す回路図で
ある。
FIG. 4 is a circuit diagram showing a battery circuit of a conventional memory card.

図において(υはスタチックRAMで、その全端子はア
ドレスバス(9)、コントロールバスαG及びデータバ
スαυとしてメモリカードのコネクタに接続される。電
源入力(7)が無いとき電池(5)から保護抵抗(41
、保護ダイオード(31を介して内部電圧線(8)に電
流Isbが供給される。逆電流防止ダイオード(2)は
電池(5)の動作のとき、電源入力(7)へ電流が流出
するのを防止する。電源人力(7)が印加されると内部
電圧線(8)には電源入力(7)の電源が供給される。
In the figure (υ is static RAM, all its terminals are connected to the memory card connector as address bus (9), control bus αG and data bus αυ. Protected from battery (5) when there is no power input (7) Resistance (41
, a current Isb is supplied to the internal voltage line (8) via a protection diode (31).A reverse current prevention diode (2) prevents current from flowing to the power supply input (7) when the battery (5) is operating. When the power source (7) is applied, the internal voltage line (8) is supplied with the power of the power input (7).

このとき電池(5)は保護ダイオード(3)の作用によ
り電池(51を消費することは無い。電池電圧信号(6
)は電池(51の消耗による電圧降下を端末機側でモニ
タできるようにコネクタに接続される。
At this time, the battery (5) does not consume the battery (51) due to the action of the protection diode (3).The battery voltage signal (6
) is connected to the connector so that the voltage drop due to consumption of the battery (51) can be monitored on the terminal side.

次に動作について説明する。電源入力(7)に電源が印
加されると逆電流防止ダイオード(2)を介して内部電
圧線(8)に電源が供給される。内部電圧線(8)の電
圧は電源入力(7)に逆電流防止ダイオード(2)の順
方向電圧を差し引いた値となる。このとき内部電圧線(
8)の電圧は電池(5)、保護抵抗(4)、保護ダイオ
ード(3)から構成される電位よりも高いから電池(5
)は保護ダイオード(3)の作用により消耗することは
無い。この状態において端末機はアドレスバス(9)、
コントロールバスαG及びデータバス(ロ)を介してス
タチックRAM (1)ヘデータの書込み、読み出しが
可能である。この動作はスタチックRAM (1)に同
一であり、また周知の技術である。この発明にも関与し
ないので説明を省略する。
Next, the operation will be explained. When power is applied to the power input (7), power is supplied to the internal voltage line (8) via the reverse current prevention diode (2). The voltage of the internal voltage line (8) is the value obtained by subtracting the forward voltage of the reverse current prevention diode (2) from the power input (7). At this time, the internal voltage line (
The voltage of battery (5) is higher than the potential of battery (5), protective resistor (4), and protective diode (3).
) will not be consumed due to the action of the protection diode (3). In this state, the terminal uses the address bus (9),
Data can be written to and read from the static RAM (1) via the control bus αG and the data bus (b). This operation is the same as static RAM (1) and is a well-known technique. Since it is not related to this invention, the explanation will be omitted.

次に電源入力(7)が無い場合は内部電圧線(81は電
池(5)の電圧が保護抵抗(4I、保護ダイオード(3
)を介して供給されるためスタテックRAM (1)の
記憶データは保持される。この状態においてスタチック
RAM (11の電池(5)における電池寿命は次のよ
うに表わせる。
Next, if there is no power input (7), the voltage of the internal voltage line (81 is the battery (5)
), the data stored in the static RAM (1) is retained. In this state, the battery life of the static RAM (11 batteries (5)) can be expressed as follows.

電池寿命−電池(5)の容量/l5b 一般的にメモリカードの外形寸法は54886 X 2
〜4mm (厚み)程度であり、大容量の電池を実装す
ることは困難である。ここでは実用的な値として電池容
量を165m1旧とし、Isb = 17μ人(周囲温
度25℃とした場合)とした場合の電池寿命は次のよう
になる。
Battery life - Capacity of battery (5)/l5b Generally, the external dimensions of a memory card are 54886 x 2
The thickness is approximately 4 mm (thickness), making it difficult to mount a large capacity battery. Here, as a practical value, the battery life is as follows when the battery capacity is 165 m1 and Isb = 17 μ people (assuming the ambient temperature is 25° C.).

電池寿命= 165mAH/ 17μA −9705,
8時間−1,1年(周囲温度25℃) 更に周囲温度を50℃とした場合はIsbaw85μA
と増加する。この場合は 電池寿命= 165mA)I/85pA −1941時
間s 0022年 となり短期間において電池(5)の交換が必要となる。
Battery life = 165mAH/17μA -9705,
8 hours - 1,1 year (ambient temperature 25℃) If the ambient temperature is further set to 50℃, Isbaw 85μA
and increases. In this case, the battery life = 165 mA) I/85 pA - 1941 hours s 0022, and the battery (5) will need to be replaced in a short period of time.

したがってメモリカードに電池を実装したまま輸送した
り、保管中において電池(51の有効期限に配慮しなけ
れば、予想しない闇に記憶データが消滅することになる
Therefore, if the memory card is transported with the battery mounted on it, or if the expiration date of the battery (51) is not taken into consideration during storage, the stored data will unexpectedly disappear.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

従来のメモリカードの電池回路は以上のように構成され
ているので、内蔵する電池容量を大きくできないため周
囲温度によっては電池寿命が非常に短かいという問題点
があった。
Since the battery circuit of a conventional memory card is constructed as described above, there has been a problem that the built-in battery capacity cannot be increased, so that the battery life is very short depending on the ambient temperature.

この発明は上記の問題点を解消するためになされたもの
で、メモリカード内部にダイオードと抵抗を介してコネ
クタに接続することによって端末機側に大容量の電池を
取り付けてメモリカード内部の電池寿命を長くすること
を目的とする。
This invention was made to solve the above problems, and it is possible to attach a large capacity battery to the terminal side by connecting it to a connector through a diode and a resistor inside the memory card, thereby reducing the battery life inside the memory card. The purpose is to make it longer.

〔課題を解決するための手段〕[Means to solve the problem]

メモリカードの内部電圧線からダイオードと抵抗を介し
てコネクタに接続することによって端末機側で大容量の
外部電池を接続できるようにしたものである。
By connecting the internal voltage line of the memory card to the connector via a diode and resistor, it is possible to connect a large capacity external battery on the terminal side.

〔作用〕[Effect]

メモリカードの内部電圧線からダイオード、抵抗を介し
てコネクタに接続する。
Connect from the memory card's internal voltage line to the connector via the diode and resistor.

〔実施例〕〔Example〕

以下、この発明の一実施例を図について説明する。第1
図はメモリカードの電池回路を示す回路図である。図に
おいて(υ〜Qカは第4図の従来例に示したものと同等
であるので説明を省略する。第1図に示す回路は従来の
電池回路に更に端末機側で大容量の外部電池が接続でき
るように外部接続用保護ダイオード(2)と外部接続用
保護抵抗(至)を直列に接続し、メモリカードのコネク
タに接続したものである。Q4は外部電池、(2)は外
部電池電圧信号である。
An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure is a circuit diagram showing a battery circuit of a memory card. In the figure, (υ~Q) are the same as those shown in the conventional example in Figure 4, so their explanation will be omitted. A protective diode for external connection (2) and a protective resistor for external connection (to) are connected in series and connected to the connector of the memory card so that Q4 can be connected to an external battery, and (2) is an external battery. It is a voltage signal.

次に動作について説明する。今、仮に端末機側に外部電
池電圧信号(至)を介して容量2QQQmAHの外部電
池α4を実装した場合の電池寿命は次のようになる。
Next, the operation will be explained. Now, if an external battery α4 with a capacity of 2QQQmAH is mounted on the terminal side via an external battery voltage signal (to), the battery life will be as follows.

周囲温度20℃の場合は 電池寿命間2165mAH/ 17μA −114,5
年周囲温度を50℃とした場合は 電池寿命−2165mAH/85μA叫2.9年となり
等偏重に電池寿命を延ばすことが可能である。一般的に
電池(5)及び外部電池a4の等偏向部抵抗は保護抵抗
(4)及び外部電池用保護抵抗(至)に比較して非常に
小さいことからこの発明の電池容量は電池(5)と外部
電池Q4の和で表わすことができる。
When the ambient temperature is 20℃, the battery life is 2165mAH/17μA -114,5
When the annual ambient temperature is 50° C., the battery life is -2165 mAH/85 μA (2.9 years), and it is possible to extend the battery life evenly. In general, the equal deflection portion resistance of battery (5) and external battery a4 is very small compared to the protective resistor (4) and the protective resistor for external battery (total), so the battery capacity of this invention is that of battery (5). and external battery Q4.

また外部電池α4にもつと電池容量の大きい物を接続す
れば更に電池寿命を延ばせることが可能である。ここで
上記説明の電池寿命は端末機に大容量の外部電池a4を
接続し、電源入力(7)を断状態にして継続した状態の
計算値である。ここでメモリカードを端末機から外した
場合、電流Isbは電池(5)からのみ供給される。今
、端末機からメモリカードを外す割り合いを24時間/
日の内、1時間と仮定すると電池のか鋤は1時間((2
3時間ので、実質的に上記電池寿命に近似できることが
わかる。
Furthermore, if a battery with a large capacity is connected to the external battery α4, the battery life can be further extended. Here, the battery life described above is a calculated value when a large-capacity external battery a4 is connected to the terminal and the power input (7) is turned off. If the memory card is removed from the terminal, the current Isb is supplied only from the battery (5). I am currently changing the rate at which I remove memory cards from my device every 24 hours.
Assuming that there is one hour in the day, the battery or plow will last for one hour ((2
It can be seen that the battery life can be substantially approximated to the above-mentioned battery life since the battery life is 3 hours.

一般に端末機にメモリカードを実装した状態が長く、所
持・携帯する割り合いが小さい製品にあってはこの発明
の電池回路は有効であることがわかる。
It can be seen that the battery circuit of the present invention is effective for products in which a memory card is generally mounted on a terminal for a long time, and the proportion of possession/portability is small.

この発明による電池(5)の消耗による電圧降下は従来
の電池回路と同様電池(5)、電池電圧信号(6)によ
り検出が可能である。
According to the present invention, a voltage drop due to consumption of the battery (5) can be detected by the battery (5) and the battery voltage signal (6) as in the conventional battery circuit.

なお、上記実施例ではメモリカード内部に外部電池用保
護ダイオード(2)及び外部電池用保護抵抗四を設けた
が、第2図に示すようにメモリカード内部には外部電池
用保護ダイオード(2)のみを設け。
In the above embodiment, an external battery protection diode (2) and four external battery protection resistors were provided inside the memory card, but as shown in FIG. 2, an external battery protection diode (2) was provided inside the memory card. only.

コネクタに接続し、外部端末機で外部電池用保護抵抗a
3、外部電池(14を接続しても良い。
Connect to the connector and use the external terminal to connect the external battery protection resistor a.
3. An external battery (14) may be connected.

また、第3図に示すようにメモリカードの内部電圧線(
8)をそのままコネクタに接続し、外部端末機で外部電
池用保護ダイオード(2)、外部電池用保護抵抗(至)
、外部電池a4を接続しても同様の効果が得られる。
Also, as shown in Figure 3, the internal voltage line of the memory card (
8) to the connector as is, and connect the external battery protection diode (2) and external battery protection resistor (to) using the external terminal.
, a similar effect can be obtained by connecting an external battery a4.

〔発明の効果〕〔Effect of the invention〕

以上のようにこの発明によればメモリカード内部に電池
寿命を延ばす手段として従来の電池回路とは別に端末機
側に大容量の電池を接続できるように外部電池用保護ダ
イオードと外部電池用保護抵抗を介してコネクタに接続
したので電池寿命を大幅に延ばせることが可能となった
As described above, according to the present invention, a protection diode for an external battery and a protection resistor for an external battery are installed inside the memory card so that a large capacity battery can be connected to the terminal side separately from the conventional battery circuit as a means of extending the battery life. Since it is connected to the connector via a , it is possible to significantly extend the battery life.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図はこの発明の一実施例によるメモリカードの電池
回路を示す回路図、第2図及び第3図はこの発明の他の
実施例によるメモ11カードの電池回路を示す回路図、
第4図は従来のメモリカードの電池回路を示す回路図で
ある。 図において、(1目よスタチックRAM 、 [21は
逆電流防止ダイオード、(3)は保護ダイオード、(4
)は保護抵抗、(5)は電池、(6)は電池電圧信号、
(7)は電池入力、(8)は内部電圧線、(9)はアド
レスバス、αOはコントロールパス%Ql)はデータバ
ス、(イ)は外部電池用保護ダイオード、(2)は外部
電池用保護抵抗、α→は外部電池、(ト)は外部電池電
圧信号である。 なお、図中、同一符号は同一、又は相当部分を示す。
FIG. 1 is a circuit diagram showing a battery circuit of a memory card according to one embodiment of the present invention, FIGS. 2 and 3 are circuit diagrams showing a battery circuit of a memo 11 card according to another embodiment of the present invention,
FIG. 4 is a circuit diagram showing a battery circuit of a conventional memory card. In the figure, (1st is static RAM, 21 is reverse current prevention diode, (3) is protection diode, (4 is
) is the protective resistance, (5) is the battery, (6) is the battery voltage signal,
(7) is battery input, (8) is internal voltage line, (9) is address bus, αO is control path %Ql) is data bus, (a) is protection diode for external battery, (2) is for external battery The protection resistor, α→ is the external battery, and (g) is the external battery voltage signal. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims (1)

【特許請求の範囲】[Claims]  メモリカードの半導体記憶素子の電源端子から、ダイ
オードと抵抗を介して上記メモリカードの端子に接続し
たことを特徴とするメモリカード。
A memory card characterized in that a power terminal of a semiconductor storage element of the memory card is connected to a terminal of the memory card via a diode and a resistor.
JP63217111A 1988-08-30 1988-08-30 Memory card Pending JPH0264722A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63217111A JPH0264722A (en) 1988-08-30 1988-08-30 Memory card

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63217111A JPH0264722A (en) 1988-08-30 1988-08-30 Memory card

Publications (1)

Publication Number Publication Date
JPH0264722A true JPH0264722A (en) 1990-03-05

Family

ID=16699023

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63217111A Pending JPH0264722A (en) 1988-08-30 1988-08-30 Memory card

Country Status (1)

Country Link
JP (1) JPH0264722A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5500907A (en) * 1991-06-25 1996-03-19 Fuji Xerox Co., Ltd. Image signal analyzing system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5500907A (en) * 1991-06-25 1996-03-19 Fuji Xerox Co., Ltd. Image signal analyzing system

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