JPH06232797A - Portable telephone set - Google Patents
Portable telephone setInfo
- Publication number
- JPH06232797A JPH06232797A JP5013730A JP1373093A JPH06232797A JP H06232797 A JPH06232797 A JP H06232797A JP 5013730 A JP5013730 A JP 5013730A JP 1373093 A JP1373093 A JP 1373093A JP H06232797 A JPH06232797 A JP H06232797A
- Authority
- JP
- Japan
- Prior art keywords
- control unit
- call
- frequency
- clock
- control section
- 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.)
- Withdrawn
Links
- 230000007423 decrease Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 19
- 230000003321 amplification Effects 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000008186 active pharmaceutical agent Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M19/00—Current supply arrangements for telephone systems
- H04M19/08—Current supply arrangements for telephone systems with current supply sources at the substations
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/02—Power saving arrangements
- H04W52/0209—Power saving arrangements in terminal devices
- H04W52/0261—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level
- H04W52/0287—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level changing the clock frequency of a controller in the equipment
- H04W52/029—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level changing the clock frequency of a controller in the equipment reducing the clock frequency of the controller
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Mobile Radio Communication Systems (AREA)
- Telephone Function (AREA)
- Power Sources (AREA)
- Transceivers (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、長時間使用を可能とし
た省電力タイプの携帯電話機に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power saving type portable telephone which can be used for a long time.
【０００２】[0002]
【従来の技術】近時、電波を利用した携帯電話機が広く
使用されるに至って来た。この種の携帯電話機は、小型
で軽量化が望まれるが、小型で軽量化を図れば、駆動源
となる電池も小型化しなければならず、そうすれば使用
時間が短縮されるという問題があった。2. Description of the Related Art Recently, mobile phones using radio waves have been widely used. This type of mobile phone is desired to be small and lightweight, but if it is made smaller and lighter, the battery serving as a drive source must also be made smaller, which causes a problem that the usage time is shortened. It was
【０００３】そこで、本発明者は、このような問題に対
応するため、電池の消費電力を、携帯電話機の使用状況
に応じて可変させることによって、使用時間の長い携帯
電話機を開発することに成功した。In order to address such a problem, the present inventor succeeded in developing a mobile phone having a long usage time by varying the power consumption of the battery according to the usage status of the mobile phone. did.
【０００４】[0004]
【発明が解決しようとする課題】したがって、上記事情
に鑑みて提案される本発明の目的は、従来の携帯電話機
に比べて、消費電力を軽減でき、もって長時間使用を可
能とした省電力タイプの携帯電話機を提供することにあ
る。SUMMARY OF THE INVENTION Therefore, an object of the present invention, which has been proposed in view of the above circumstances, is a power-saving type which can reduce power consumption and can be used for a long time as compared with a conventional mobile phone. Is to provide a mobile phone.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
に提案される本発明の携帯電話機は、通話待機時と通話
時を判別する主制御部と、この主制御部の判別結果に応
じて、通話時には、音声制御部、ベースバンド制御部に
供給する動作クロックを所定の周波数となし、通話待機
時には、音声制御部に供給する動作クロックを停止する
とともに、ベースバンド制御部へ供給する動作クロック
の周波数を通話時よりも低下させるクロック制御部とを
備えた構成となっている。SUMMARY OF THE INVENTION A mobile phone of the present invention proposed to achieve the above object has a main control section for discriminating between a call waiting state and a call state, and a main control section according to a discrimination result of the main control section. During a call, the operation clock supplied to the voice control unit and the baseband control unit is set to a predetermined frequency, and during the call standby, the operation clock supplied to the voice control unit is stopped and the operation clock supplied to the baseband control unit is stopped. And a clock control unit that lowers the frequency of the above compared to that during a call.
【０００６】このような本発明の携帯電話機は、音声制
御部、ベースバンド制御部に動作クロックの周波数を
高、低変化させることによって消費電力が変化するＤＳ
Ｐなどの高速演算処理型マイクロコンピュータを用いて
構成できるので、主制御部で通話時と待機時の判別を行
い、通話待機時と判断したときに、クロック制御部から
音声制御部やベースバンド制御部に供給する動作クロッ
クの周波数を通話時の状態よりも低下させることによっ
て、消費電力を軽減している。In such a mobile phone of the present invention, a DS whose power consumption is changed by changing the frequency of the operation clock to high or low in the voice control unit and the baseband control unit.
Since it can be configured by using a high-speed arithmetic processing type microcomputer such as P, the main control unit determines whether the call is in standby or not, and when it is determined that the call is in standby, the clock control unit controls the voice control unit and the baseband control. Power consumption is reduced by lowering the frequency of the operation clock supplied to the unit from the state during a call.
【０００７】また、このような携帯電話機では、主制御
部は、コマンド処理を行うときのみキー操作部から割り
込み信号を受けて、自身が具備するクロックオシレータ
を間欠駆動させることもできる。Further, in such a mobile phone, the main control section can receive the interrupt signal from the key operation section only when performing the command processing, and intermittently drive the clock oscillator included in the main control section.
【０００８】[0008]
【作用】本発明に係る携帯電話機では、音声制御部やベ
ースバンド制御部が殆ど作動していない期間を、主制御
部で判別し、これらの制御部へ供給する動作クロックを
停止させるか又はその周波数を下げる方法を採用してお
り、これによって、全体の電力消費を抑えている。In the portable telephone according to the present invention, the main control unit determines the period during which the voice control unit and the baseband control unit are hardly operating, and stops the operation clocks supplied to these control units, or It employs a method of lowering the frequency, which reduces the overall power consumption.
【０００９】[0009]
【実施例】以下に、図面を参照して本発明の実施例を説
明する。図１は本発明の携帯電話機Ａのハード構成の一
例を示すブロック図である。この携帯電話機Ａは、主制
御部１をＭＰＵ（マイクロコンピュータ）で構成し、テ
ンキーや機能キーを備えたキー操作部２が接続されてい
る。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an example of the hardware configuration of the mobile phone A of the present invention. In this mobile phone A, a main control unit 1 is composed of an MPU (microcomputer), and a key operation unit 2 equipped with a numeric keypad and function keys is connected.
【００１０】また、クロック制御部３のクロックジェネ
レータＣＧから出力されるクロック信号は、分周器４に
よって分周制御されている。ここに、クロック制御部は
ＡＳＩＣ（カスタムＩＣ）で構成され、ベースバンド制
御部５、音声制御部６の各々はＤＳＰ（高速演算処理型
マイクロコンピュータ）を含んで構成されている。ＭＰ
ＵやＤＳＰはＣＭＯＳ等で構成されているので、動作ク
ロックの周波数変化に応じて消費電力も変化する。The frequency of the clock signal output from the clock generator CG of the clock controller 3 is controlled by the frequency divider 4. Here, the clock control unit is configured by an ASIC (custom IC), and each of the baseband control unit 5 and the voice control unit 6 is configured by including a DSP (high-speed arithmetic processing type microcomputer). MP
Since the U and DSP are composed of CMOS or the like, the power consumption also changes according to the frequency change of the operation clock.
【００１１】ベースバンド制御部５には、アンテナ９を
有し、送信制御部、受信制御部、分波器を含んだ高周波
増幅制御回路部８が、アナログ／デジタル信号変換回路
１０を介して接続されており、音声制御部６には、アナ
ログ／デジタル信号変換回路１１を介してマイクＭＩＣ
とスピーカＳＰが接続されている。クロック制御部３
は、主制御部１からの動作クロック切替信号に基づい
て、ベースバンド制御部５及び音声制御部６に供給する
動作クロックの周波数を高速モードから低速モードに切
り替え制御できるようになっている。The baseband control section 5 has an antenna 9 and a high frequency amplification control circuit section 8 including a transmission control section, a reception control section and a demultiplexer is connected via an analog / digital signal conversion circuit 10. The voice control unit 6 is connected to the microphone MIC via the analog / digital signal conversion circuit 11.
And speaker SP are connected. Clock control unit 3
On the basis of the operation clock switching signal from the main control unit 1, the frequency of the operation clock supplied to the baseband control unit 5 and the audio control unit 6 can be controlled to be switched from the high speed mode to the low speed mode.
【００１２】ベースバンド制御部５は、携帯電話機Ａの
発信、着信、通話などに必要な制御コマンドの解読を行
うもので、通話時には、音声制御部６によって圧縮され
た音声信号を高周波増幅制御回路部８に送出したり、高
周波増幅制御回路部８で復調された信号から音声信号と
コマンド信号を分離して、主制御部１や音声制御部６に
出力する動作をなすが、通話待機時には、復調された電
波信号のなかからコマンド信号の抽出を行なうなどの処
理が必要なだけで、通話時に比べると、そのデータ処理
量は格段に少なくなる。したがって、クロック制御部３
よりベースバンド制御部５に供給する動作クロックの周
波数は、通話時に、例えば２８ＭＨｚ程度が必要な場
合、通話待機時では２．８ＭＨｚの低周波域まで下げさ
せても支障がない。The baseband control unit 5 decodes the control commands necessary for making, receiving, and talking on the mobile phone A. At the time of a call, the voice signal compressed by the voice control unit 6 is subjected to a high frequency amplification control circuit. The voice signal and the command signal are separated from the signal sent to the unit 8 or demodulated by the high frequency amplification control circuit unit 8 and output to the main control unit 1 and the voice control unit 6. Only the processing such as extracting the command signal from the demodulated radio wave signal is required, and the amount of data processing is remarkably smaller than that at the time of a call. Therefore, the clock controller 3
Further, when the frequency of the operation clock supplied to the baseband control unit 5 needs to be, for example, about 28 MHz during a call, it can be lowered to a low frequency range of 2.8 MHz during a call standby.
【００１３】主制御部１では、通話待機時であることを
判断した場合には、クロック制御部３に動作クロック切
替信号を送出して、ベースバンド制御部５に供給する動
作クロックの周波数を待機時モードつまり、「高速モー
ド」から「低速モード」に切り替え制御している。一方
の音声制御部６は、携帯電話機Ａの使用者からマイクＭ
ＩＣを通して入力され、アナログ／デジタル変換部１１
を介して送出される音声信号を圧縮したり、ベースバン
ド制御部５から受けた音声信号を伸長するために必要な
信号処理を行うもので、このような音声制御部６は、通
話時以外には何ら処理を行わない。したがって、その動
作クロックを通話待機時に停止させてしまっても何ら支
障はないので、主制御部１は通話待機時であることを判
断した場合には、クロック制御部３による動作クロック
の供給を停止させている。When the main control unit 1 determines that the call is on standby, it sends an operation clock switching signal to the clock control unit 3 and waits for the frequency of the operation clock supplied to the baseband control unit 5. The hour mode, that is, the switching from the "high speed mode" to the "low speed mode" is controlled. On the other hand, the voice control unit 6 allows the user of the mobile phone A to receive the microphone M.
Input via IC, analog / digital converter 11
The voice control unit 6 performs signal processing necessary for compressing a voice signal transmitted via the base station and expanding the voice signal received from the baseband control unit 5. Does nothing. Therefore, there is no problem even if the operation clock is stopped during the call waiting. Therefore, when the main controller 1 determines that the call is waiting, the supply of the operation clock by the clock controller 3 is stopped. I am letting you.
【００１４】なお、以上のような消費電力の省力化は、
主制御部１についても同様に行うことができる。すなわ
ち、通話待機時には、キー操作部２から入力されるコマ
ンド信号の処理以外に必要とされる各処理はごく限られ
たものに限定されるので、コマンド信号の処理時のみ自
らのクロックジェネレータＣＧＯを間欠駆動させて、消
費電力を抑えるようにすることもできる。The power saving of the power consumption is as follows.
The same can be done for the main controller 1. In other words, during call waiting, each process required other than the process of the command signal input from the key operation unit 2 is limited to a very limited process, so that the own clock generator CGO can be used only during the process of the command signal. It is also possible to drive intermittently to suppress power consumption.
【００１５】一方、基地局からの呼出によって着信した
り、キー操作部２を操作して発呼が行われたりした場合
には、主制御部１は、通話時に必要な消費電力を賄うた
め、クロック制御部３を制御して、動作クロックを通話
時モード、つまり「低速モード」から「高速モード」に
切替える。すなわち、上記の例では、ベースバンド制御
部５や音声制御部６には２８ＭＨｚの高周波動作クロッ
クを供給する。On the other hand, when an incoming call is made by a call from the base station or a call is made by operating the key operation unit 2, the main control unit 1 covers the power consumption required for a call. The clock control unit 3 is controlled to switch the operation clock from the call mode, that is, the “low speed mode” to the “high speed mode”. That is, in the above example, the high-frequency operation clock of 28 MHz is supplied to the baseband controller 5 and the audio controller 6.
【００１６】なお、ベースバンド制御部５、音声制御部
６、及び主制御部１において、通話待機時と通話時とに
おける動作クロックの制御状況とそれに伴う消費電力と
の関係を、表１に一例として示す。Table 1 shows an example of the relationship between the control status of the operating clock and the power consumption accompanying it in the call standby and the call in the baseband controller 5, the voice controller 6, and the main controller 1. Show as.
【００１７】[0017]
【表１】 本発明の携帯電話機Ａに装備させるバッテリー（不図
示）の電流容量を１１００ｍＡｈと想定したとき、通話
待機時に動作クロックを停止させたり、その周波数を低
周波に下げさせたりする処理を行った場合、実に１３時
間もの使用時間が可能となったが、このような処理を行
わなかった場合には僅か４時間程度の使用しかできなか
った。両者を比べれば、本発明による効果の大なること
は明らかである。[Table 1] Assuming that the current capacity of the battery (not shown) equipped in the mobile phone A of the present invention is 1100 mAh, when the processing for stopping the operation clock during a call standby or lowering its frequency to a low frequency is performed, Actually, it was possible to use it for as long as 13 hours, but if such treatment was not performed, it could only be used for about 4 hours. By comparing the two, it is clear that the effect of the present invention is great.
【００１８】以下に、本発明の携帯電話機における省電
力動作の一例をフローチャートをもって示す。図２のス
テップ１００〜１０６は、着信時における動作手順を示
すタイムチャートであり、制御チャンネルを受信し、呼
出信号を確認した後、動作クロックの周波数を高速モー
ドから低速モードに切り換えている。ここに、ＳＩＤは
サービス会社を識別するシステムＩＤコード、ＭＩＮ１
は電話番号の下７桁を２４ｂｉｔに変換したコード、Ｍ
ＩＮ２は電話番号の上３桁を１０ｂｉｔに変換したコー
ドで市外局番に相当する。また、ｓ，ｒは受信した情
報、ｐは携帯電話機に登録された情報を示している。An example of the power saving operation of the mobile phone of the present invention will be described below with a flowchart. Steps 100 to 106 in FIG. 2 are time charts showing the operation procedure at the time of incoming call. After the control channel is received and the ringing signal is confirmed, the frequency of the operation clock is switched from the high speed mode to the low speed mode. Here, SID is a system ID code for identifying a service company, MIN1.
Is a code that converts the last 7 digits of the telephone number to 24 bits, M
IN2 is a code obtained by converting the first three digits of the telephone number into 10 bits and corresponds to the area code. Further, s and r indicate received information, and p indicates information registered in the mobile phone.
【００１９】図３のステップ２００〜２０３は、発信時
における動作手順を示すタイムチャートで、発呼先ダイ
ヤルを入力した後、キー操作部２のＳＥＮＤキーを操作
することによって、発呼が確認され、動作クロックの周
波数を低速モードから高速モードに切り換えている。な
お、図４のステップ３００〜３０７は、通話終了後に待
機モードに復帰するまでの動作手順を示したタイムチャ
ートであり、基地局との間で所定のハンドシェイクを行
った後に、通話チャンネルは開放され、動作クロックの
周波数は高速モードから低速モードに切り換えられる。Steps 200 to 203 in FIG. 3 are time charts showing the operation procedure at the time of making a call. After the dial of the call destination is input, the call is confirmed by operating the SEND key of the key operation unit 2. , The frequency of the operation clock is switched from the low speed mode to the high speed mode. Note that steps 300 to 307 of FIG. 4 are time charts showing an operation procedure until the call returns to the standby mode after the call ends, and the call channel is released after the predetermined handshake with the base station. Then, the frequency of the operation clock is switched from the high speed mode to the low speed mode.
【００２０】[0020]
【発明の効果】以上の説明から理解されるように、本発
明に係る携帯電話機によれば、通話待機時においては、
音声制御部やベースバンド制御部などに対し、動作クロ
ックを停止させるか又は高周波から低周波に切り替える
ようにしてあるので、電力消費が抑えられ、１回のバッ
テリー交換（又は充電）下での長時間使用が可能とな
る。As can be understood from the above description, according to the mobile phone of the present invention, when the telephone is on standby,
Since the operation clock is stopped or switched from high frequency to low frequency for the voice control unit and the baseband control unit, the power consumption is suppressed, and the long-time operation under one battery replacement (or charging) is suppressed. It can be used for hours.
【図１】本発明に係る携帯電話機のハード構成の一例を
示すブロック図である。FIG. 1 is a block diagram showing an example of a hardware configuration of a mobile phone according to the present invention.
【図２】本発明に係る携帯電話機における省電力動作の
一例、特に着呼後通話に入るまでの動作を示したフロー
チャートである。FIG. 2 is a flowchart showing an example of a power saving operation of the mobile phone according to the present invention, particularly an operation until a call is made after an incoming call.
【図３】本発明に係る携帯電話機における省電力動作の
一例、特に発呼後通話に入るまでの動作を示したフロー
チャートである。FIG. 3 is a flowchart showing an example of a power saving operation of the mobile phone according to the present invention, in particular, an operation until a call is made after a call is made.
【図４】本発明に係る携帯電話機における省電力動作の
一例、特に通話終了後待機状態に入るまでの動作を示し
たフローチャートである。FIG. 4 is a flowchart showing an example of a power saving operation of the mobile phone according to the present invention, particularly an operation until a standby state is entered after the call ends.
Ａ・・・携帯電話機 １・・・主制御部 ３・・・クロック制御部 ５・・・ベースバンド制御部 ６・・・音声制御部 A ... Mobile phone 1 ... Main control unit 3 ... Clock control unit 5 ... Baseband control unit 6 ... Voice control unit
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【手続補正書】[Procedure amendment]
【提出日】平成５年３月２３日[Submission date] March 23, 1993
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１５[Name of item to be corrected] 0015
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１５】一方、基地局からの呼出によって着信した
り、キー操作部２を操作して発呼が行われたりした場合
には、主制御部１は、通話時に必要な処理能力を賄うた
め、クロック制御部３を制御して、動作クロックを通話
時モード、つまり「低速モード」から「高速モード」に
切替える。すなわち、上記の例では、ベースバンド制御
部５や音声制御部６には２８ＭＨｚの高周波動作クロッ
クを供給する。On the other hand, when an incoming call is made by a call from the base station or a call is made by operating the key operation unit 2, the main control unit 1 covers the processing capacity required during a call. The clock control unit 3 is controlled to switch the operation clock from the call mode, that is, the “low speed mode” to the “high speed mode”. That is, in the above example, the high-frequency operation clock of 28 MHz is supplied to the baseband controller 5 and the audio controller 6.
【手続補正２】[Procedure Amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１６[Correction target item name] 0016
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１６】なお、ベースバンド制御部５、音声制御部
６、及び主制御部１において、通話待機時と通話時とに
おける動作クロックの制御状況とそれに伴う消費電流と
の関係を、表１に一例として示す。Table 1 shows an example of the relationship between the control status of the operating clock and the current consumption accompanying it in the call standby and the call in the baseband controller 5, the voice controller 6, and the main controller 1. Show as.
【手続補正３】[Procedure 3]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】００１７[Correction target item name] 0017
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【００１７】[0017]
【表１】 [Table 1]
【手続補正４】[Procedure amendment 4]
【補正対象書類名】図面[Document name to be corrected] Drawing
【補正対象項目名】図２[Name of item to be corrected] Figure 2
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図２】 [Fig. 2]
【手続補正５】[Procedure Amendment 5]
【補正対象書類名】図面[Document name to be corrected] Drawing
【補正対象項目名】図４[Name of item to be corrected] Fig. 4
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図４】 [Figure 4]
Claims (1)
と、この主制御部の判別結果に応じて、通話時には、音
声制御部、ベースバンド制御部に供給する動作クロック
を所定の周波数となし、通話待機時には、音声制御部に
供給する動作クロックを停止するとともに、ベースバン
ド制御部へ供給する動作クロックの周波数を通話時より
も低下させるクロック制御部とを備えた携帯電話機。1. A main control unit for discriminating between a call waiting state and a call state, and an operation clock supplied to a voice control unit and a baseband control unit at a predetermined frequency during a call according to the discrimination result of the main control unit. That is, the mobile phone including a clock control unit that stops the operation clock supplied to the voice control unit during call standby and lowers the frequency of the operation clock supplied to the baseband control unit compared to during call.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5013730A JPH06232797A (en) | 1993-01-29 | 1993-01-29 | Portable telephone set |
| FR9400986A FR2701182A1 (en) | 1993-01-29 | 1994-01-28 | Portable telephone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5013730A JPH06232797A (en) | 1993-01-29 | 1993-01-29 | Portable telephone set |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06232797A true JPH06232797A (en) | 1994-08-19 |
Family
ID=11841363
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5013730A Withdrawn JPH06232797A (en) | 1993-01-29 | 1993-01-29 | Portable telephone set |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH06232797A (en) |
| FR (1) | FR2701182A1 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5909585A (en) * | 1996-02-21 | 1999-06-01 | Mitsubishi Denki Kabushiki Kaisha | Portable remote terminal in which its clock frequency is switched |
| US6272116B1 (en) | 1997-06-27 | 2001-08-07 | Nec Corporation | Power saving device |
| JP2002218539A (en) * | 2001-01-16 | 2002-08-02 | Mega Chips Corp | Integrated circuit for image processing |
| US6519706B1 (en) | 1998-10-12 | 2003-02-11 | Nec Corporation | DSP control apparatus and method for reducing power consumption |
| JP2005346672A (en) * | 2004-06-07 | 2005-12-15 | Canon Inc | Memory controlling method, memory control system, program, and storage medium |
| JP2006178854A (en) * | 2004-12-24 | 2006-07-06 | Toshiba Corp | Electronic circuit |
| JP2008124531A (en) * | 2006-11-08 | 2008-05-29 | Nec Electronics Corp | Semiconductor device and audio processor chip |
| US9235972B2 (en) | 1997-01-21 | 2016-01-12 | Pragmatus Mobile LLC | Personal security and tracking system |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5566357A (en) * | 1994-10-06 | 1996-10-15 | Qualcomm Incorporated | Power reduction in a cellular radiotelephone |
| DE69831692T2 (en) * | 1998-11-19 | 2006-06-14 | Mitsubishi Electric Corp | Mobile message terminal |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2212030A (en) * | 1987-11-02 | 1989-07-12 | Philips Nv | Cellular telephone apparatus |
| JPH0642691B2 (en) * | 1988-05-21 | 1994-06-01 | 富士通株式会社 | Mobile phone terminal |
| EP0522720B1 (en) * | 1991-06-18 | 1999-08-18 | Nokia Mobile Phones Ltd. | Clock frequency adjustment of an electrical circuit |
-
1993
- 1993-01-29 JP JP5013730A patent/JPH06232797A/en not_active Withdrawn
-
1994
- 1994-01-28 FR FR9400986A patent/FR2701182A1/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5909585A (en) * | 1996-02-21 | 1999-06-01 | Mitsubishi Denki Kabushiki Kaisha | Portable remote terminal in which its clock frequency is switched |
| US9235972B2 (en) | 1997-01-21 | 2016-01-12 | Pragmatus Mobile LLC | Personal security and tracking system |
| US6272116B1 (en) | 1997-06-27 | 2001-08-07 | Nec Corporation | Power saving device |
| US6519706B1 (en) | 1998-10-12 | 2003-02-11 | Nec Corporation | DSP control apparatus and method for reducing power consumption |
| JP2002218539A (en) * | 2001-01-16 | 2002-08-02 | Mega Chips Corp | Integrated circuit for image processing |
| JP2005346672A (en) * | 2004-06-07 | 2005-12-15 | Canon Inc | Memory controlling method, memory control system, program, and storage medium |
| JP2006178854A (en) * | 2004-12-24 | 2006-07-06 | Toshiba Corp | Electronic circuit |
| JP2008124531A (en) * | 2006-11-08 | 2008-05-29 | Nec Electronics Corp | Semiconductor device and audio processor chip |
Also Published As
| Publication number | Publication date |
|---|---|
| FR2701182A1 (en) | 1994-08-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Application deemed to be withdrawn because no request for examination was validly filed |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20000404 |