CN1071292A - Wireless telephonic electricity-saving appliance - Google Patents
Wireless telephonic electricity-saving appliance Download PDFInfo
- Publication number
- CN1071292A CN1071292A CN92110607A CN92110607A CN1071292A CN 1071292 A CN1071292 A CN 1071292A CN 92110607 A CN92110607 A CN 92110607A CN 92110607 A CN92110607 A CN 92110607A CN 1071292 A CN1071292 A CN 1071292A
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- China
- Prior art keywords
- power supply
- receiving system
- normal mode
- far
- key
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Classifications
-
- 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
- H04W52/0267—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by controlling user interface components
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/005—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting using a power saving mode
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Human Computer Interaction (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Mobile Radio Communication Systems (AREA)
Abstract
Process of the present invention has been preserved the battery supply of cordless telephone, comprises an elementary cell and a far-end unit.Far-end unit has a receiver, keyboard and the electricity-saving appliance switch that is used to start power supply preserving type or normal mode.This process comprises at first determines switch activated which mode of electricity-saving appliance.If the startup normal mode powers up the key of pressing with keyboard scan to receiver periodically.If start the power supply preserving type, the key pressed of keyboard scan periodically when receiver remains on powering state not.
Description
The present invention relates to the communications field in general, relate in particular to radio telephone.
Wireless or radio telephone comprises the local unit of elementary cell and one or more far-end units typically.An example of this cordless telephone can be seen in the people's such as Gillig that transfer Motorola Inc No. 4989230 United States Patent (USP)s, quote at this for reference, general in 1000 feet scope of elementary cell far-end unit communicate by letter with elementary cell by radio frequency (RF).Elementary cell is received the landline telephone system, make like this remote subscriber can with the telephone communication of other landline.
In order to save power supply, this far-end unit makes to receive stays off-position, power supply in short-term periodically.Because far-end unit has the incoming call of alarm sensor notice, in order to check the key pressed on the keyboard or power supply from the incoming ring signal receiver that elementary cell is come is added.When receiver powers up, it draws a large amount of power from the battery of far-end, has reduced the time that far-end unit can be used for call like this.The result needs a kind of method to reduce the power that this far-end unit uses when not carrying out call.
Process of the present invention has been saved the battery supply of Wireless Telecom Equipment.This equipment has receiving system, data input device and the electricity-saving appliance switch that is used to start battery saving mode or normal mode.This process comprises which mode of at first determining to start the electricity-saving appliance switch.If the startup normal mode is added to receiving system and data input device power cycle the key of pressing is scanned.If the startup battery saving mode, this data input device key scanning to pressing periodically when receiving system remains on powering state.
Fig. 1 represents the block diagram of the elementary cell of cordless telephone.
Fig. 2 represents the block diagram of the far-end unit of cordless telephone.
Fig. 3 represents to start the process flow diagram of scramble demonstration mode.
Fig. 4 represents the block diagram of scrambler integrated circuit.
Fig. 5 represents the flow chart of power saving process of the present invention.
Fig. 6 represents the block diagram of electricity-saving appliance circuit of the present invention.
Process of the present invention has reduced the time that the far-end unit receiver uses power supply.By a switch is set in the battery saving mode position, this receiver is unlike in the normal mode and is switched on like that periodically, thereby reduces electrical source consumption.
The most preferred embodiment of the block diagram illustrating cordless telephone elementary cell of Fig. 1, this elementary cell has controllable scramble and the encrypted circuit that is used for the encryption and decryption signal.This specific elementary cell also comprises a speaker-phone.The most preferred embodiment of the far-end unit that Fig. 2 explanation is communicated by letter with this elementary cell, this far-end unit also is useful on the controllable scramble and the encrypted circuit of encryption and decryption signal.
Referring to Fig. 1, this elementary cell comprises the reception that is connected to elementary cell and the antenna (101) of sendaisle.Receive path comprises the band pass filter (102) that allows 49.670-49.990MKz to pass through.This filter is received reception amplifier (103), the about 18dB of the signal of this amplifier amplification filtering.The output of this amplifier is being input to receiver (105) before by another band pass filter (104) filtering.In most preferred embodiment, receiver is the MC3363 that can obtain from Motorola Inc.
This signal of receiver (105) mixing drops to 10.7MKz and arrives 455KHz then.This signal is by demodulation then.Local oscillator in the receiver (105) is by phase-locked loop (120) control, and its frequency is controlled by microprocessor (112).Microprocessor (112) also from the signal of receiver (105) reception carrier detection signal and demodulation, is labeled as the RX data.The signal of demodulation is used to translate the coded data message that sends from far-end unit by microprocessor (112).These encoded data message are used to dtmf dialing, the control of telephone hook switch control and scramble circuit.Carrier sense signal is used to detect the existence at the transmitter of using the elementary cell receive channel.In most preferred embodiment, microprocessor (112) is the MC68HCLD5C4 that can obtain from Motorola Inc.
The output of receiver (105) is again by another band pass filter (106) filtering.The output of filter (106) is imported into scramble circuit (107).In most preferred embodiment, scramble circuit (107) is the MX108DW full duplex voice band scrambler integrated circuit that can obtain from MX.Com company.
The output of the not scramble of scrambler circuit (107) is in that to be input to expander (109) filtered in deemphasis filter (108) before.The process of expansion is added to input signal with the function of signal amplitude to gain.For signal significantly, actual gain is bigger, and littler for its actual gain of small amplitude signal.After this signal was by high pass filter (110) filtering, it was imported into speaker-phone circuit (111), also outputs to the landline telephone system.If the use speaker-phone, for example in elementary cell, the third-party call between far-end unit and the landline side, audio signal output is to the loud speaker of elementary cell.
The sendaisle of elementary cell comprises audio signal, perhaps comes from the transmitter (121) of speaker-phone or from landline side, is carrying out bandpass filtering (113) before by compressor reducer (114).Compressor reducer (114) is added to audio signal with the function of signal amplitude to gain, and the actual gain of small-signal is bigger.An example of compandor (compressor reducer/expander) is the MC33110 that is made by Motorola Inc.The dynamic range of compandor is 80dB.
The output of compressor reducer (114) is being imported into preemphasis filter (115) before by scrambler circuit (116) scramble.Scrambler circuit (116) is half in addition of identical integrated circuit that is used for the descrambling received signal.Before being modulated to the frequency of 46.610-46.970MKz scope by transmitter (118), the audio signal of scramble is carried out bandpass filtering (117).It is selectable that the actual frequency that telephone set uses can be that the user passes through in switch or other control of telephone set elementary cell or far-end unit.To all cordless telephones, reception and transmit frequency range are all set by FCC.An example of transmitter is the MC2833 that Motorola Inc makes.
The output of transmitter is carried out bandpass filtering (119) with the signal outside the filtering 46.610-46.970MKz scope.This signal is transmitted into far-end unit from antenna (101) then.
Far-end unit comprises from the antenna of elementary cell received signal (201).Band pass filter (202) is removed that part of signal outside the 46.610-46.970MKz scope.At its by bandpass filtering (204) once more before, approximately the gain of 18dB is added to this signal by reception amplifier (203).This signal is input to receiver (205) then.
This signal of far-end unit receiver (205) down-conversion is converted to 455KHz then to 10.7MKz.This signal of demodulation then.The signal that is designated as the demodulation of RX data is input to microprocessor (212) so that the encoded data message that translation is sent by elementary cell.These encoded data message are also carried out bandpass filtering (206) before being used to control the ringer of far-end and scramble.Scrambler circuit (207) is identical with the integrated circuit that uses in elementary cell.
The output of scramble is not being passed through expander (209) before by deemphasis filter (208) filtering.The signal of expansion is by bandpass filtering (210) and amplify (211).Amplifier (211) is controlled by microprocessor (212).By in control of far-end unit operation, the user can increase or reduce the volume that gain on the signal that is added in this point increases or reduce loud speaker (220).Amplifying signal is input to the earphone speaker of far-end unit.
The microphone of far-end unit (221) produces audio signal, and this signal carried out bandpass filtering (213) before by the scrambler processing of circuit, compression (214) and by preemphasis filter (215) filtering.This circuit (216) is second half of integrated circuit that is used to the signal that scramble receives.
The signal of scramble carried out bandpass filtering before a frequency that is modulated to by transmitter (218) in the 49.67-49.99MHz scope.The signal of modulation carries out bandpass filtering (219) to eliminate signal and the emission on the antenna (201) of far-end unit outside this frequency range.
Be used for the off-hook of telephone set at the keyboard (222) of far-end unit, the input telephone number changes communicate by letter with elementary cell employed frequency and startup scramble model function.Keyboard starts the scramble model function by the control signal of telling microprocessor to produce the scramble integrated circuit.In most preferred embodiment, elementary cell also has keyboard.
After the scramble function, the control signal in far-end unit and elementary cell all is connected to this transmitter, so that these signals are not by scramble.The control signal that is produced by microprocessor is carried out wired OR with voice signal to the scramble of transmitter input.
Signal scramble between far-end unit and the elementary cell is carried out continuously.But this scramble is vague to the telephone subscriber or a side of the other end of calling out.Therefore, will not know whether scramble correctly carries out.Scramble demonstration program of the present invention provides the both sides of call can hear signal scramble pattern.
The process of explanation scramble demonstration among Fig. 3.When telephone set is in calling, the key that the microprocessor keyboard scan is pressed, as safety demonstration key, its indicating remote unit users wants to import the scramble demonstration mode.In most preferred embodiment, this mode is called safe demonstration mode.
If this key is (302) of pressing, the timer in the microprocessor starts (303).If this key discharges (304) immediately, timer is eliminated (305) and keyboard is scanned (301).If this key is still pressed (304), then timer is incremented (306) and checks to determine whether this key has pressed at least 3 seconds (307).This time check continues till this key has been pressed 3 seconds.At this moment, carry out scramble demonstration mode (308).This can indicate by glittering indicator light luminous (309) at far-end unit or elementary cell.The keyboard of far-end unit can be used for above-mentioned processor, if elementary cell has a keyboard, then this keyboard can be used for importing the scramble demonstration mode.
Fig. 4 illustrates MX108DW full duplex voice band scrambler integrated circuit.Because this integrated circuit frequency of utilization is inverted scramble, is input to this circuit and will be turned back to normal condition by this circuit by the signal of scramble.
In order to make telephone set be in the scramble demonstration mode, MX108DW must be able to transmit this input signal that does not have scramble.This is to realize by the control input of control mark for removing/scramble.By logical one being added to this input, this signal is sent out by this passage through removing passage.The logical zero of this control input of class will cause this signal to be sent out by this passage through the scramble passage.
When the scramble demonstration mode started, the most preferred embodiment of cordless telephone was forbidden the whole scramble integrated circuit in the far-end unit.This allows the landline side of telephone subscriber and path can both hear the difference frequency signal of scramble.
Be in microprocessor in power saving process of the present invention illustrated in fig. 5 and stop or sleep mode (501) beginning.Microprocessor receives an interruption (502) of external clock then.This interruption is checking from the next input of the keyboard of elementary cell or far-end unit to start microprocessor of carrying out periodically.
Microprocessor check electricity-saving appliance switch is to determine the mode (503) of telephone set then.If this switch is in normal operation mode, then the power supply signal that is added to receiver and reception is used for being monitored (504) from the data that elementary cell is come.If the electricity-saving appliance switch is positioned at power supply preserving type position, then power supply is not added to receiver.
Keyboard is scanned to determine whether that key presses (505).If a key is pressed (506), this key processed (507) then.An example of this key is the last-number redial key or the number button of dialing the number.
If key is not pressed (506), determine whether power supply is added to receiver (508).If receiver is leaving, determine whether to receive data (509).If data are received, these data processed (510).The example of the type of the data that receive is the bell signals that start alarm sound from elementary cell order far-end unit.
Next step check software timer is to determine that microprocessor is whether in the time that requires work (511).In most preferred embodiment, at the power supply preserving type microprocessor 40ms that wakes, and at the normal mode 125ms that wakes.The power supply load of the time decreased far-end unit battery that the power supply preserving type shortens.
If should not have the time (511) in the past, process repeats (505) from retouching keyboard.If this time-out goes to (511), power supply adds that the power supply that then is added to receiver is cut off (512) when beginning.
If the electricity-saving appliance switch is to be positioned at power supply preserving type (513), then the time is reset to 40ms(515).If this switch is positioned at normal mode, this time is reset to 125ms(514).Microprocessor turned back to sleep state 1.2 seconds then, and in most preferred embodiment, process begins to be through with after this.
Fig. 6 illustrates electricity-saving appliance circuit of the present invention.This circuit is included in the police (601) of microprocessor (602) input, and when switch (601) was closed, logical one was input to microprocessor (602), and like this, the indication telephone set is in the power supply preserving type.Make microprocessor (602) break away from the interruption of sleep mode from keyboard (603) or from sleep timer (604).Transistor switch (605) is received microprocessor, makes microprocessor (602) can connect transistor (605) and adds power supply to receiver.The data recovered that receives from elementary cell is input to microprocessor from receiver.
In most preferred embodiment, when at the power supply preserving type, cordless telephone still can or be opened the attack thing (the filp) of far-end unit by the key on the keypad.When calling had finished, far-end unit automatically turned back to the power supply preserving type, if this is to exhale the preceding mode of selecting of receiving.
Also in most preferred embodiment, the user can use far-end unit input telephone number, and this number is stored in and is used to remember last dialing in the elementary cell memory.These numbers can be transfused to when far-end unit is in the power supply preserving type.In this case, microprocessor is automatically opened transmitter and is sent these numbers to the elementary cell storage.After certain hour, transmitter shutdown and far-end unit automatically return to the power supply preserving type, if that mode of selecting before being.
In brief, the wireless or cordless telephone that has controllable scramble between far-end unit and the elementary cell has been described, therefore safe conversation is provided between telephone subscriber and landline side.This phone also has a normal source consumption ways and a power supply preserving type.By telephone set being placed the power supply preserving type, this telephone set can use between the battery charge than during long.
Claims (6)
1, have receiving system, data input device and being used for starts the Wireless Telecom Equipment of the electricity-saving appliance switch of power supply preserving type working method, the method that a kind of battery supply is preserved, and the method comprising the steps of:
Determine switch activated which kind of mode of electricity-saving appliance;
If the startup normal mode powers up receiving system periodically;
If the startup normal mode, the key that the scan-data input unit is pressed when power supply is added to receiving system; With
If start the power supply preserving type, when receiving system still is in not powering state, the key pressed of scan-data input unit periodically.
2, according to the method for claim 1, also comprise step:
If the startup normal mode, check data after power supply has been added to receiving system; With
Disconnect the power supply of receiving system.
3, have receiving system, data input device and being used for starts the Wireless Telecom Equipment of the electricity-saving appliance switch of power supply preserving type or working method, the method that a kind of battery supply is preserved, and the method comprising the steps of:
Determine switch activated which kind of mode of electricity-saving appliance;
If the startup normal mode powers up receiving system periodically;
If the startup normal mode, the key that the scan-data input unit is pressed when power supply is added to receiving system;
If start the power supply preserving type, the key pressed of scan-data input unit and need not to power up periodically to receiving system;
If the startup normal mode, check data after power supply has been added to receiving system;
If power supply has been added to receiving system, power supply is disconnected from receiving system.
4, the method that a kind of battery supply is preserved in the radio telephone with an elementary cell and a far-end unit, elementary cell is sent out through communication medium and is closed data-signal to far-end unit, this far-end unit has receiving system, data input device with a plurality of keys, processing unit and the electricity-saving appliance switch that is used to start normal mode or power supply preserving type, the method comprising the steps of:
A. Interrupt Process device periodically;
B. when processing unit is interrupted,, power up receiving system if start normal mode;
C. when processing unit was interrupted, if start the power supply preserving type, receiving system remained on the pass electricity condition;
D. the key pressed of scan-data input unit;
If e. key is pressed, handle this key;
If f. power supply is added to receiving system, the data-signal that check is sent by elementary cell;
If g. start normal mode, if repeat or start the power supply preserving type then repeat from steps d at second preset time at first preset time; With
If h. power supply is added to receiving system, cut off the electricity supply from receiving system.
5, according to the method for claim 4, wherein first preset time is 125 milliseconds, and second preset time is 40 milliseconds.
6, a kind of radio Phone unit, have a far-end unit and an elementary cell that is connected to telephone system, far-end unit is communicated by letter with elementary cell by communication medium, and far-end unit has a receiver, keyboard and processing unit, this radio Phone unit comprises:
Power switch device is received processing unit, is used to control to the power supply of receiver;
The mode switch device is received processing unit, is used to start power supply preserving type or normal mode; With
The response mode switching device controls to the processing unit of the power supply of receiver, the method that a kind of power supply is preserved, and the method comprising the steps of:
Determine which mode the mode switch device starts;
If the startup normal mode powers up receiver periodically;
If the startup normal mode, the key that keyboard scan is pressed when power supply is added to receiver; With
If start the power supply preserving type, the key pressed of keyboard scan periodically when receiver remains on powering state not.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US76055891A | 1991-09-16 | 1991-09-16 | |
| US07/760,558 | 1991-09-16 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1071292A true CN1071292A (en) | 1993-04-21 |
Family
ID=25059469
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN92110607A Pending CN1071292A (en) | 1991-09-16 | 1992-09-14 | Wireless telephonic electricity-saving appliance |
Country Status (7)
| Country | Link |
|---|---|
| CN (1) | CN1071292A (en) |
| AU (1) | AU2417892A (en) |
| FR (1) | FR2683408A1 (en) |
| IT (1) | IT1258482B (en) |
| MX (1) | MX9205231A (en) |
| TW (1) | TW198141B (en) |
| WO (1) | WO1993006682A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1070015C (en) * | 1997-07-25 | 2001-08-22 | 刘海先 | Power supply for wireless PBX |
Families Citing this family (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| ES2182910T3 (en) * | 1994-07-21 | 2003-03-16 | Interdigital Tech Corp | METHOD AND APPARATUS OF CONTROL OF ENERGY CONSUMPTION OF A SUBSCRIBER UNIT OF A COMMUNICATIONS SYSTEM. |
| US6775531B1 (en) | 1994-07-21 | 2004-08-10 | Interdigital Technology Corporation | Subscriber terminal temperature regulation |
| KR100193829B1 (en) * | 1996-06-26 | 1999-06-15 | 윤종용 | Key lock control device and method for mobile wireless telephone |
| US5726636A (en) * | 1996-12-05 | 1998-03-10 | Ericsson Inc. | Emergency telephone with automatic low-battery signaling |
| JP4522564B2 (en) * | 2000-09-22 | 2010-08-11 | 富士通株式会社 | Electronics |
| US9203489B2 (en) | 2010-05-05 | 2015-12-01 | Google Technology Holdings LLC | Method and precoder information feedback in multi-antenna wireless communication systems |
| US9419457B2 (en) * | 2012-09-04 | 2016-08-16 | Google Technology Holdings LLC | Method and device with enhanced battery capacity savings |
| US9356461B2 (en) | 2012-09-25 | 2016-05-31 | Google Technology Holdings, LLC | Methods and systems for rapid wireless charging where the low state of charge (SOC) temperature dependent charging current and low SOC temperature limit are higher than the high SOC temperature dependent charging current and high SOC temperature limit |
| US9813262B2 (en) | 2012-12-03 | 2017-11-07 | Google Technology Holdings LLC | Method and apparatus for selectively transmitting data using spatial diversity |
| US9591508B2 (en) | 2012-12-20 | 2017-03-07 | Google Technology Holdings LLC | Methods and apparatus for transmitting data between different peer-to-peer communication groups |
| US9979531B2 (en) | 2013-01-03 | 2018-05-22 | Google Technology Holdings LLC | Method and apparatus for tuning a communication device for multi band operation |
| US10229697B2 (en) | 2013-03-12 | 2019-03-12 | Google Technology Holdings LLC | Apparatus and method for beamforming to obtain voice and noise signals |
| US9491706B2 (en) | 2013-03-13 | 2016-11-08 | Google Technology Holdings LLC | Reduced-power transmitting from a communications device |
| US9386542B2 (en) | 2013-09-19 | 2016-07-05 | Google Technology Holdings, LLC | Method and apparatus for estimating transmit power of a wireless device |
| US9596653B2 (en) | 2013-12-16 | 2017-03-14 | Google Technology Holdings LLC | Remedying power drain via a coverage map |
| US9549290B2 (en) | 2013-12-19 | 2017-01-17 | Google Technology Holdings LLC | Method and apparatus for determining direction information for a wireless device |
| US9491007B2 (en) | 2014-04-28 | 2016-11-08 | Google Technology Holdings LLC | Apparatus and method for antenna matching |
| US9865897B2 (en) | 2014-06-02 | 2018-01-09 | Google Llc | Stacked electrochemical cell with increased energy density |
| US9478847B2 (en) | 2014-06-02 | 2016-10-25 | Google Technology Holdings LLC | Antenna system and method of assembly for a wearable electronic device |
| US9438293B2 (en) | 2014-08-05 | 2016-09-06 | Google Technology Holdings LLC | Tunable circuit elements for dynamic, per element power |
| US9472965B2 (en) | 2014-09-08 | 2016-10-18 | Google Technology Holdings LLC | Battery cycle life through smart overnight charging |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4731814A (en) * | 1986-02-21 | 1988-03-15 | AT&T Information Systems Inc. American Telephone & Telegraph Company | Computer-controlled cordless telephone |
| JPS6392132A (en) * | 1986-10-06 | 1988-04-22 | Toshiba Corp | Cordless telephone system |
| KR910008738B1 (en) * | 1987-02-20 | 1991-10-19 | 닛본 덴기 가부시기가이샤 | Portable radio apparatus having battery saved channel scanning function |
-
1992
- 1992-07-14 TW TW081105542A patent/TW198141B/zh active
- 1992-07-24 AU AU24178/92A patent/AU2417892A/en not_active Abandoned
- 1992-07-24 WO PCT/US1992/006143 patent/WO1993006682A1/en unknown
- 1992-09-09 IT ITRM920656A patent/IT1258482B/en active IP Right Grant
- 1992-09-14 CN CN92110607A patent/CN1071292A/en active Pending
- 1992-09-14 MX MX9205231A patent/MX9205231A/en unknown
- 1992-09-16 FR FR9211037A patent/FR2683408A1/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1070015C (en) * | 1997-07-25 | 2001-08-22 | 刘海先 | Power supply for wireless PBX |
Also Published As
| Publication number | Publication date |
|---|---|
| TW198141B (en) | 1993-01-11 |
| IT1258482B (en) | 1996-02-26 |
| ITRM920656A1 (en) | 1994-03-09 |
| AU2417892A (en) | 1993-04-27 |
| MX9205231A (en) | 1993-03-01 |
| WO1993006682A1 (en) | 1993-04-01 |
| FR2683408A1 (en) | 1993-05-07 |
| ITRM920656A0 (en) | 1992-09-09 |
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