WO2000060419A1 - Appareil electronique et procede de commande d'un appareil electronique - Google Patents
Appareil electronique et procede de commande d'un appareil electronique Download PDFInfo
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- WO2000060419A1 WO2000060419A1 PCT/JP2000/002089 JP0002089W WO0060419A1 WO 2000060419 A1 WO2000060419 A1 WO 2000060419A1 JP 0002089 W JP0002089 W JP 0002089W WO 0060419 A1 WO0060419 A1 WO 0060419A1
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- Prior art keywords
- power supply
- supply voltage
- power
- electronic device
- voltage
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C5/00—Details of stores covered by group G11C11/00
- G11C5/14—Power supply arrangements, e.g. power down, chip selection or deselection, layout of wirings or power grids, or multiple supply levels
- G11C5/145—Applications of charge pumps; Boosted voltage circuits; Clamp circuits therefor
-
- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G19/00—Electric power supply circuits specially adapted for use in electronic time-pieces
- G04G19/02—Conversion or regulation of current or voltage
Definitions
- the present invention relates to an electronic device having a storage unit capable of rewriting data in one day and a control method thereof, and is particularly suitable for generating a rewriting voltage required for rewriting data in an analog clock or a digital clock.
- the present invention relates to an electronic device and a control method thereof. Background art
- the adjustment of the rate (the amount of time in the watch that differs from the standard time; seconds / day) is performed by measuring the rate in a circuit block or movement state, and then using the nonvolatile memory according to the test results. Adjustment for adjusting the rate was done by writing the evening.
- Such an analog electronic timepiece has a battery with a terminal voltage of about 1.5 V, and uses the battery voltage as the power supply voltage to supply power to the drive circuit of the drive mode that drives the hands and the time measurement circuit that measures time. are doing.
- the rewriting voltage required when rewriting data in a nonvolatile memory depends on the manufacturing process, but is usually about 18 V. Therefore, it is necessary to boost the power supply voltage in order to generate the rewrite voltage.
- an N-channel transistor having a plurality of gates and drains connected in common is connected in series, and one end of a capacitor is connected to the source of each N-channel transistor.
- the first clock is supplied from the other end of the capacitor connected to the source of the N-channel transistor, and the second clock is supplied from the other end of the capacitor connected to the source of the even-numbered N-channel transistor.
- the first clock and the second clock are signals that do not overlap each other.
- one stage (one MOS transistor) (VDDâV th)).
- the present invention has been made in view of the above-described circumstances, and provides an electronic device capable of generating a rewrite voltage without complicating or enlarging a circuit configuration, and a control method thereof. Aim. Disclosure of the invention
- a power generation unit configured to convert external energy into electric energy to supply power
- a power storage member configured to store power supplied by the power generation unit, and a power supply voltage supplied from the power storage member.
- a booster that boosts the first power supply voltage and supplies it directly or indirectly to each part of the device as a second power supply voltage, and boosts the second power supply voltage to generate a third power supply voltage;
- a storage unit that stores the first data and a third power supply voltage that is supplied as a rewrite voltage at the time of rewriting the data.
- the booster in the first aspect of the present invention, includes a second power storage member that is stored at the second power supply voltage, and a third power supply voltage that boosts the second power supply voltage. And a second power supply voltage boosting section.
- the second power supply storage member supplies the second power supply voltage directly or indirectly to each part of the device.
- the booster in the first aspect of the present invention, includes a second power storage member that is stored at the second power supply voltage, and a second power supply voltage that normally boosts the first power supply voltage.
- the second power storage member is supplied to the second power storage member when data is rewritten.
- a first power supply voltage booster that boosts a second power supply voltage supplied by the second power supply voltage to generate a fourth power supply voltage
- a second power supply voltage booster that boosts the fourth power supply voltage and generates a third power supply voltage
- the boosting unit stops the boosting operation when the first power supply voltage exceeds a predetermined voltage.
- the first booster executes the boosting operation only when rewriting data in the storage.
- the booster when reading data, the booster is controlled to perform a boosting operation in accordance with the voltage of the power storage member, while the data is rewritten.
- a control unit is provided for controlling the boosting unit so as to perform the boosting operation regardless of the voltage of the power storage member.
- An eighth aspect of the present invention is characterized in that in the first aspect of the present invention, there is provided time display means which operates based on the power supplied from the first booster and displays time.
- the booster performs the boosting operation in accordance with the voltage of the power storage member during a normal operation, while the booster performs the voltage boosting operation during data rewriting.
- the boosting operation is performed regardless of the voltage.
- a tenth aspect of the present invention is characterized in that the second power supply voltage booster is a charge pump circuit.
- a eleventh aspect of the present invention provides a power generation unit that supplies electric power by converting external energy into electric energy, a power storage member that stores power with a second power supply voltage, and a power supply voltage that is normally supplied from the power generation unit.
- a certain first power supply voltage is boosted and supplied directly or indirectly to each part of the device as a second power supply voltage, and the second power supply voltage supplied from the power storage member at the time of rewriting is boosted.
- a storage unit to which a fourth power supply voltage is supplied.
- the second booster is a charge pump circuit.
- the storage unit is nonvolatile. .
- a driving motor for driving an object and a motor coil of the driving motor are provided.
- a receiving unit that receives externally supplied rewriting data and supplies the data to the storage unit.
- a fifteenth aspect of the present invention provides a power generating unit that converts external energy into electric energy and supplies power, a power storage device that stores power supplied by the power generating unit, and a storage unit that stores data.
- a first power supply voltage which is a power supply voltage supplied from a power storage device, is boosted and supplied directly or indirectly to each part of the device as a second power supply voltage
- a boosting step of boosting the second power supply voltage to generate a third power supply voltage and a rewrite voltage supply step of supplying the third power supply voltage as a rewrite voltage when rewriting data.
- a power generation unit that converts external energy into electric energy and supplies power
- a power storage device that stores power with a second power supply voltage
- a storage unit that stores data.
- a first power supply voltage which is a power supply voltage normally supplied from a power generation unit
- a first boosting step in which the second power supply voltage supplied from the power storage device is boosted at the time of data rewriting and a third power supply voltage is obtained, and a third power supply voltage is boosted to become the fourth power supply voltage at the time of data rewriting. It is characterized by comprising a second boosting step and a rewriting voltage supplying step of supplying supplying a fourth power supply voltage as a rewriting voltage at the time of rewriting for a while.
- FIG. 1 is a schematic configuration block diagram of an analog electronic timepiece according to a first embodiment of the present invention.
- FIG. 2 is a circuit diagram of the charge pump circuit according to the first embodiment.
- FIG. 3 is a block diagram of the power supply unit according to the first embodiment.
- FIG. 4 is a diagram illustrating a detailed configuration of the booster circuit according to the first embodiment.
- FIG. 5 is a diagram illustrating a switch state with respect to a boost ratio of the booster circuit according to the first embodiment.
- FIG. 6 is a diagram illustrating a state of the p-parallel connection when the boosting factor of the booster circuit according to the first embodiment is three times.
- FIG. 7 is a diagram illustrating a state of the seria1 connection when the boosting factor of the boosting circuit according to the first embodiment is three times.
- FIG. 8 is a graph illustrating a boosting operation of the booster circuit according to the first embodiment.
- FIG. 9 is an explanatory diagram of the operation in the normal mode of the second embodiment.
- FIG. 10 is an explanatory diagram of the operation in the rewrite mode according to the second embodiment.
- FIG. 11 is an explanatory diagram of a more specific configuration of the second embodiment.
- FIG. 12 is a schematic configuration diagram of a main part of an analog electronic timepiece using the thermogenerator of the third embodiment.
- FIG. 13 is an operation explanatory diagram of the third embodiment in the normal mode.
- FIG. 14 is an explanatory diagram of the operation in the rewrite mode of the third embodiment.
- FIG. 15 is an explanatory diagram of a more specific configuration of the third embodiment. BEST MODE FOR CARRYING OUT THE INVENTION
- a wristwatch-type analog electronic timepiece will be described as an example of the electronic device.
- the present invention is not limited to this.
- the present invention is applicable to any external adjustment device that performs communication and adjustment with an electronic device having a driving motor coil for driving a hand).
- FIG. 1 shows a schematic block diagram of an analog electronic timepiece.
- the analog electronic clock 10 is composed of a clock circuit 11, a motor coil 12 for driving the hands, a receiving circuit 13, a serial-to-parallel conversion circuit 14, and a nonvolatile memory 1 for storing the adjustment data.
- power supply It comprises a power supply section 16 for generating the voltage VDD2, a charge pump circuit 17, a frequency adjustment circuit 18 and a control circuit 19.
- the receiving circuit 12 is a circuit for detecting a voltage induced in the coil 12 by a signal transmitted from the outside, and a comparator circuit or a comparator for comparing the induced voltage with one or more voltages. It is composed of an inverter circuit and the like.
- the clock circuit 11 oscillates the reference oscillation signal CLK using the crystal oscillator X, oscillates the frequency dividing circuit, and drives the driving motor for movement based on the divided signal.
- a driving circuit for generating a driving pulse signal therefor.
- the oscillation constant and the division ratio of the oscillation frequency dividing circuit can be adjusted by the frequency adjusting circuit 18.
- the motor coil 12 is a part of the hand driving motor.
- the mobile coil 12 in the rewrite mode for rewriting the adjustment data, is electromagnetically coupled to the coil of the external adjustment device, and also functions as an antenna for transmitting and receiving various data.
- the receiving circuit 13 is connected to the motor coil 12 and receives adjustment data supplied from an external adjustment device.
- the serial-to-parallel conversion circuit 14 is connected to the reception circuit 13 and converts received serial data into parallel data.
- the adjustment time is a time generated by measuring the rate of the analog clock 10 using an external adjustment device in advance and based on the measurement result. Used to adjust the division ratio.
- the non-volatile memory 15 is provided with an EPROM and a sense amplifier for data readout, and stores the parallel adjustment data. This non-volatile memory 15 stores 1 when reading the adjustment data.
- the power supply section 16 Operates with a power supply voltage VDD2 of about 5 V. However, when erasing adjustment data or writing adjustment data, a programming voltage Vp of about 18 V is required.
- the power supply section 16 is controlled by the first to third control signals CTL1 to CTL3 supplied from the control circuit 19, and generates the power supply voltage VDD2.
- the power supply unit 16 includes a charging circuit for charging the large-capacity capacitor with the voltage generated by the generator and a booster circuit for boosting the voltage of the large-capacity capacitor.
- the boosting ratio is determined by the first control signal CTL1 and the second control signal CT1. It is controlled by L2, and the charging operation is controlled by a third control signal CTL3.
- the power supply voltage VDD2 is normally adjusted to approximately 1.2 V to 2.5 V, but when the adjustment data is erased and written, the power supply voltage VDD2 is adjusted to 4.5 V.
- the charge pump circuit 17 includes N-channel transistors M1 to M6 and capacitors C1 to C6.
- the odd-numbered capacitors C 1, C 3,... Are supplied with the first clock CLK 1 through the gate circuit G 1, and the even-numbered capacitors C 2, C 4,. It is supplied via a gate circuit G2.
- the first clock CLK 1 and the second clock CLK 2 are signals that do not overlap with each other, and the gate circuits G 1 and G 2 receive the fourth control signal CTL 4 which is at the H level only in the rewrite mode. It is supplied from the control circuit 19. Therefore, the charge pump circuit 17 operates in the rewrite mode and does not operate in the normal mode.
- the capacitor C6 in the last stage functions as a power storage member for storing the boosted voltage.
- the reason why the number of stages of the charge pump circuit 17 is not as small as 6 is that the boosting ratio is adjusted in the power supply unit 16 so that the power supply voltage VDD2 becomes 4.5 V during the writing of the adjustment data. . As a result, the circuit scale of the charge pump circuit 17 can be reduced, and the chip area occupied by the IC can be significantly reduced.
- the frequency adjustment circuit 18 is configured to read the adjustment data stored in the non-volatile memory 15 and control the oscillation frequency and the division ratio of the oscillation frequency dividing circuit based on the adjustment data. This makes it possible to adjust the frequency characteristics of the oscillation frequency divider circuit, which differs depending on the product, so that extremely high-precision timekeeping can be performed.
- control circuit 19 is connected to each component, and controls the entire analog electronic timepiece 10 based on the reference oscillation signal CLK supplied from the oscillation frequency dividing circuit of the clock circuit 11.
- the control circuit 19 constantly monitors the voltage value of the power supply voltage VDD1 (details will be described later). If the voltage value exceeds a predetermined voltage, the control circuit 19 instructs a voltage increase. When the voltage falls below a predetermined voltage, a first control signal CTU for instructing a voltage reduction is generated, and a second control signal CTL2 for instructing the boosting ratio to be maximum at the time of writing / erasing of the adjustment data is generated.
- FIG. 3 is a block diagram showing a detailed configuration of the power supply unit.
- the power supply section 16 is roughly composed of a generator 100, a charging circuit 20, a large-capacity capacitor 30, a booster circuit 40, and an auxiliary capacitor 50.
- the reference potential GND is set to VSS (low voltage side).
- the reference potential GND may be set to V DD (high voltage side).
- the generator 100 includes a stage 1 12 around which a coil 110 is wound, and a disk-shaped mouth 1 1 4 magnetized with two poles.
- the rotary weight 1 16 rotates and the movement rotates the mouth 1 1 4 by the wheel train mechanism 1 18. ing. Therefore, according to such a generator 100, AC power is generated between the terminals AG1 and AG2 located at both ends of the coil 110 due to the turning of the rotary weight 116. Become. When a large-amplitude electromagnetic wave is transmitted from the external adjustment device in the rewrite mode, AC power is excited in the coil 110.
- the charging circuit 20 is configured to charge the large-capacity capacitor 30 by full-wave rectification or half-wave rectification of the AC power generated by the generator 100.
- the charging circuit 20 may be configured using a plurality of active elements such as diodes or transistors.
- the booster circuit 40 is configured to boost the power supply voltage VDD1 to generate the power supply voltage VDD2 based on the first control signal CTL1 and the second control signal CTL2, and to charge this to the auxiliary capacitor 50.
- FIG. 4 showing a detailed configuration example of the boosting circuit
- FIG. 5 showing an example of a switch state with respect to the boosting factor of the boosting circuit.
- the booster circuit 40 has switches SW1, SW2, SW3, SW4, SW11, SW12, SW13, SW14, SW21, and boost capacitors Ca and Cb.
- the case where the boosting ratio shown in FIG. 5 is 3 times will be described as an example.
- the voltage can be boosted by the same method as in the case of 3 times described above.
- the control circuit 19 sets the logic level of the fourth control signal CTL4 to L level, and stops the operation of the charge pump circuit 17. As a result, the power consumed by the charge pump circuit 17 is reduced.
- the control circuit 19 measures the power supply voltage VDD1, which is the terminal voltage of the large-capacity capacitor 30, and based on the measurement result, increases the voltage of the booster circuit 40.
- the pressure magnification is controlled.
- the case where the power supply voltage VDD1 increases will be described as an example.
- the boosting ratio of the booster circuit 40 is changed based on the voltage value of the power supply voltage VDD1.
- FIG. 8 is a graph showing the boosting operation of the booster circuit.
- the booster circuit 40 is in a non-operating state.
- the control circuit 19 controls the booster circuit 40 to perform the triple boosting operation.
- the booster circuit 40 performs the triple boosting operation, and the triple boosting operation is continued until the power supply voltage VDD1 becomes 0.62 V.
- the charging voltage of the auxiliary capacitor 50 becomes 1.35 V or more, and each part of the analog electronic timepiece 10 can operate using the power supply voltage VDD2.
- the control circuit 19 controls the booster circuit 40 to perform the double boosting operation.
- the booster circuit 40 performs a double boosting operation, and this double boosting operation is continued until the power supply voltage VDD1 becomes 0.83 V.
- the charging voltage of the auxiliary capacitor 50 becomes 1.24 V or more, and each part of the analog electronic timepiece 10 can operate using the power supply voltage VDD2.
- the control circuit 19 controls the booster circuit 40 to perform a 1.5-fold boost operation.
- the booster circuit 40 performs a 1.5-fold boost operation, and this 1.5-fold boost operation is continued until the power supply voltage VDD1 becomes 1.23 V.
- the charging voltage of the auxiliary capacitor 50 becomes 1.24 V or more, and each part of the analog electronic timepiece 10 can operate using the power supply voltage VDD2.
- the control circuit 19 when the power supply voltage VDD1 exceeds 1.23 V, the control circuit 19 finally causes the booster circuit 40 to perform a 1x boost operation (short mode), that is, a non-boost operation. I do.
- the control circuit 19 outputs the third control signal CTL3 for instructing the stop of the charging operation to the charging circuit 20.
- the charging circuit 20 forms a detour of the charging path to the large-capacity capacitor 30, thereby diverting the generated current from the generator 100 and preventing the large-capacity capacitor 30 from being charged. This prevents excessive generated voltage from being applied to the large-capacity capacitor 30.
- the analog electronic timepiece 10 is arranged close to the external adjustment device so that various data can be transmitted and received, and the coil 12 and the coil of the external adjustment device are electromagnetically coupled.
- the receiving circuit 13 of the analog electronic timepiece 10 receives the signal from the motor coil 12 and receives the received data. Output to control circuit 19 as evening. Thereafter, the control circuit 19 identifies the pulse pattern of the received data, detects that the received data is a rewrite mode transition signal, and outputs the second control signal CTL2 and the fourth control signal CTL4. Set the logic level to H level (active).
- the booster circuit 40 sets the boost ratio to 3 regardless of the voltage value of the power supply voltage VDD2. As a result, the booster circuit 40 operates at the maximum boost ratio.
- a large-amplitude electromagnetic wave is transmitted from the external adjustment device.
- an electromotive voltage is excited in the coil 110 of the generator 100, and the charging circuit 20 charges the large-capacity capacitor 30 with electric power based on the electromotive voltage.
- the power supply voltage VDD1 which is the voltage between the terminals of the large-capacity capacitor 30, gradually increases, and the voltage value of the power supply voltage VDD1 reaches approximately 1.5 V in a steady state.
- the booster circuit 40 boosts the power supply voltage VDD1 at a boosting factor of 3 times.
- the voltage value of the power supply voltage VDD2 which is the voltage between the terminals of the auxiliary capacitor 50, becomes 4.5 V.
- the charge pump circuit 17 starts the boosting operation, boosts the power supply voltage VDD2, and stores the programming voltage Vp in the capacitor C6.
- the charge pump circuit 17 is composed of six stages, and its boosting ratio is approximately four times. Generates 18 V programming voltage Vp based on power supply voltage VDD2.
- the external adjustment device stops transmission of the electromagnetic wave for power generation, and thereafter, start data for instructing the start of transmission of adjustment data is transmitted to the analog electronic timepiece 10. Then, the control circuit 19 detects the start time and prepares for receiving the adjustment data. Thereafter, when the external adjustment device transmits the adjustment data in a serial data format, the receiving circuit 13 receives the adjustment data via the motor coil 12. The received adjustment data is converted to a parallel format by the serial-to-parallel conversion circuit 14 and supplied to the nonvolatile memory 15.
- the nonvolatile memory 15 erases the adjustment data written using the program voltage Vp, and then writes new adjustment data. This completes the rewriting of the adjustment date.
- the booster circuit 40 is not only used as a circuit for generating the power supply voltage VDD2 required to operate the clock circuit 11 and the like, but also used as a program. Since it is also used to generate the use voltage Vp, the boosting factor of the charge pump circuit 17 can be reduced. As a result, the number of stages of the charge pump circuit 17 can be reduced, and the circuit scale can be significantly reduced. Furthermore, when the charge pump circuit 17 is built in the IC, the occupied chip area can be reduced, and the manufacturing cost can be reduced.
- the output of the booster circuit 4 ° is supplied as a power supply to the control circuit 19 or the driving circuit 11A during the writing of the adjustment data (program voltage Vp supply).
- the control circuit 19 or the drive circuit 11 A is supplied with the output of the large-capacity capacitor 30 as the power supply to drive.
- a voltage booster circuit is also used as a program voltage Vp generation circuit for the nonvolatile memory 15. Therefore, in the second embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted.
- the analog electronic timepiece 1 OA includes an inverter INV that inverts and outputs a second control signal CTL2, a control circuit 19 of a power supply voltage VDD1, and a driving circuit.
- the first switch SW1 which is provided on the supply path for the circuit 11A and is controlled by the inverted signal of the second control signal CTL2, and is provided on the supply path for the control circuit 19 and the drive circuit 11A for the power supply voltage VDD2 And a second switch SW2 controlled by a second control signal CTL2.
- a display unit 12 A drives a pointer by a motor coil 12 to display time.
- FIG. 11 shows a specific circuit configuration.
- the first switch SW1 is actually constituted by a P-channel MOS transistor MP1, and an inverted signal of the second control signal CTL2 is input to a gate terminal thereof.
- the second switch SW2 is actually constituted by a P-channel MOS transistor MP2, and the second control signal CTL2 is input to the gate terminal thereof.
- the charge pump circuit 17 is not operating.
- the second control signal CTL2 is at the âLâ level, and the P-channel MOS transistor MP1, which is the first switch SW1, is turned off.
- the charging circuit 20 When power is generated by the generator '100, the charging circuit 20 performs rectification and charges the large-capacity capacitor 30.
- the booster circuit 40 boosts the power supply voltage VDD1, which is the output of the large-capacity capacitor 30, to generate the power supply voltage VDD2, and charges this to the auxiliary capacitor 50.
- the power supply voltage VDD2 is supplied to the control circuit 19 and the drive circuit 11A, the control circuit 19 controls the entire analog electronic timepiece 1OA, and the drive circuit 11A The coil 12 is driven, and the time is displayed on the display unit 12A.
- the second control signal CTL2 is at the âHâ level
- the P-channel MOS transistor MP1 which is the first switch SW1 is turned on
- the second switch is turned on.
- SW2 the P-channel MOS transistor MP2, is off.
- the charging circuit 20 When power is generated by the generator 100, the charging circuit 20 performs rectification and charges the large-capacity capacitor 30.
- the booster circuit 40 boosts the power supply voltage VDD1, which is the output of the large-capacity capacitor 30, to generate the power supply voltage VDD2, and charges this to the auxiliary capacitor 50.
- the charge pump circuit 17 boosts the power supply voltage VDD2 supplied from the auxiliary capacitor 50, generates a program voltage Vp, and supplies it to the nonvolatile memory 15.
- the power supply voltage VDD1 is supplied to the control circuit 19 and the drive circuit 11A, the control circuit 19 controls the entire analog electronic timepiece 1OA, and the drive circuit 11A drives the mobile coil 12 Then, the time is displayed on the display unit 12A.
- the nonvolatile memory 15 erases the adjustment data written using the program voltage Vp under the control of the control circuit 19, and then writes new adjustment data and adjusts the adjustment data. The evening rewrite ends.
- the booster circuit 40 for driving the analog electronic timepiece can also be used as the programming voltage Vp generation circuit of the nonvolatile memory 15 and the charge pump circuit
- the circuit scale can be reduced, and the IC chip size can be reduced, and the cost can be reduced.
- the first and second embodiments described above are embodiments in which a magnetic generator having a relatively large electromotive force is used as the generator 100
- the third embodiment is applied to a thermoelectric generator. This is an embodiment in which a generator having a relatively small electromotive force is used.
- FIG. 12 is a schematic configuration diagram of an analog electronic timepiece when a thermoelectric generator is used.
- the analog electronic timepiece 10B using the thermoelectric generator has a thermoelectric generator 10 OA that generates electric power using the temperature difference, a case 101 for storing each mechanism, and a windshield for protecting the hands.
- the heat transmitted from the back side 103 side is quickly transmitted to the case 101 side, and the thermal gradient between the temperature of the back side 103 side of the heat generator 101A and the temperature of the case 101 side.
- a heat conducting part 105 for generating the following.
- the thermal generator 10 OA is connected to a large-capacity capacitor 3 OA via a booster circuit 4 OA at the subsequent stage.
- thermoelectric generator 100A rises via the back side 103.
- the temperature on the case side of the heat generator 100A is radiated to the atmosphere via the heat conducting part 105 and the case 101, and the temperature on the back side 103 side of the heat generator 101A and the case 101 A thermal gradient is generated between the temperature and the side temperature, and the thermoelectric generator 100A generates electric power.
- the generated voltage of the thermal generator 100A is boosted and stored in the large capacity capacitor 30A as the power supply voltage VDD1.
- the generated voltage of such a summer generator 100A is usually about 0.4 [V] to 0.5 [V] when it is normally carried. Since the operating power supply voltage of the electronic watch is about 1.4 [V:] to 3 [V], the generated voltage is boosted three to eight times by the booster circuit 40A and stored in the large capacity capacitor 30A. You do it. [3.2] Configuration of Third Embodiment
- the analog electronic timepiece 10B of the second embodiment includes an inverter INV that inverts and outputs the second control signal CTL2, and a power supply of the booster circuit 40A from the charging circuit 20.
- a first switch SW1 provided in the supply path and controlled by an inverted signal of the second control signal CTL2; and a first switch SW1 provided in the supply path of the power supply of the large-capacity capacitor 3OA from the booster circuit 4OA and the second switch signal CTL2.
- a second switch SW2 controlled by the inversion signal a third switch SW3 provided in a power supply path from the booster circuit 4 OA to the power supply of the large-capacity capacitor 3 OA and controlled by the second control signal CTL2; 4OA, and a fourth switch SW4 provided on a power supply path between the charge pump circuit 17 and controlled by a second control signal CTL2.
- Fig. 15 shows a specific circuit configuration.
- the first switch SW1 is actually composed of a P-channel MOS transistor MP3, and has its gate terminal supplied with an inverted signal of the second control signal CTL2.
- the second switch SW2 is actually constituted by a P-channel MOS transistor MP4, and an inverted signal of the second control signal CTL2 is input to its gate terminal.
- the third switch SW3 is actually constituted by a P-channel MOS transistor MP5, and the second control signal CTL2 is input to its gate terminal.
- the fourth switch SW4 is actually constituted by a P-channel MOS transistor MP6, and the second control signal CTL2 is input to its gate terminal.
- the second control signal CTL2 is at the âLâ level, and the P-channel MOS transistor P1, which is the first switch SW1, is turned on.
- the P-channel MOS transistor, which is the second switch SW2, turns on MP4, and the P-channel M â S transistor, which is the third switch SW3, is turned on.
- the power switch MP5 is turned off, and the P-channel MOS transistor MP6, which is the fourth switch SW4, is turned off.
- the charging circuit 20 When power is generated by the generator 100, the charging circuit 20 performs rectification and supplies the rectified power to the booster circuit 4OA.
- the booster circuit 4OA boosts the output voltage of the charging circuit 20 to the power supply voltage VDD1 and supplies the boosted voltage to the large-capacity capacitor 3OA to charge the large-capacity capacitor 3OA.
- the power supply voltage VDD1 is supplied to the control circuit 19 and the drive circuit 11A, and the control circuit 19 controls the entire analog electronic timepiece 1OA, and the drive circuit 11A controls the motor coil 12 Then, the time is displayed on the display unit 12A.
- the second control signal CTL2 is at the âHâ level, and the P-channel MOS transistor MP3, which is the first switch SW1, is turned off.
- the P-channel MOS transistor MP4, which is the switch SW2, is turned off, the P-channel MOS transistor MP5, which is the third switch SW3, is turned on, and the P-channel MOS transistor, which is the fourth switch SW4, is turned on.
- MP 6 is on.
- boosting circuit 4 OA is c charge pump circuit 1 7 supplies to the charge pump circuit 1 7 boosts the power supply voltage VDD1 is a large-capacity capacitor 3 OA output voltage until the power supply voltage VDD2, the power supply voltage VDD2 To generate a programming voltage Vp and supply it to the nonvolatile memory 15.
- the power supply voltage VDD1 is supplied to the control circuit 19 and the drive circuit 11A, the control circuit 19 controls the entire analog electronic timepiece 10A, and the drive circuit 11A drives the motor coil 12, The time is displayed on the display unit 12A.
- the nonvolatile memory 15 erases the adjustment data that has been written using the programming voltage Vp under the control of the control circuit 19, and then writes a new adjustment data and rewrites the adjustment data. finish.
- the booster circuit 40A that boosts the power generation voltage of the thermal generator to generate the power supply voltage for driving the analog electronic timepiece is provided by the nonvolatile memory It can also be used as the programming voltage Vp generation circuit of the memory 15 and the number of boosting stages of the charge pump circuit 17 can be reduced, making it possible to reduce the circuit scale. Costs can be reduced.
- the charge pump circuit 17 is used to generate the program voltage Vp.
- the nonvolatile memory 15 is manufactured using an improved manufacturing process, and the program voltage Vp is generated. If p can be reduced, the charge pump circuit 17 may be omitted.
- the booster circuit 40 performs the boosting operation based on the voltage value of the power supply voltage VDD1 at the time of reading out the adjustment data by the first control signal CTL1 and the second control signal CTL2. On the other hand, when writing the adjustment data, set the boost ratio to 3 times regardless of the voltage value of the power supply voltage VDD1.
- the charge pump circuit 17 may have a limiting function.
- the control circuit 19 sets the logic level of the control signal to L level and stops the boosting operation. This prevents the voltage value of the programming voltage Vp from exceeding the withstand voltage of the nonvolatile memory 15.
- the generator 100 has been described as an example of the power generation mechanism.
- the present invention is not limited to this, and any power generation unit that generates electric power by converting external energy into electric energy can be used. Anything can be applied.
- any power generation unit that generates electric power by converting external energy into electric energy can be used. Anything can be applied.
- it may be a power generation device that generates electric power by its effect.
- a source that generates electric power by photoelectric conversion using light energy such as sunlight It may be an electric device (solar cell).
- thermo energy equivalent to external energy
- an electromagnetic induction power generator that receives floating electromagnetic waves such as broadcast and communication radio waves and uses the energy (corresponding to external energy).
- the analog electronic timepiece 10 has been described as an example.
- the present invention is not limited to this, and may be a digital timepiece, a pocket watch, or the like. Also, it can be applied to various electronic devices such as electric toothbrush, electric shaving, calculator, mobile phone, portable personal computer, electronic organizer, portable radio and portable VTR.
- the adjustment data is stored in the non-volatile memory 15.
- an ID number various adjustment data of a sensor or a detection circuit may be stored.
- data can be written not only during the adjustment process at the factory, but also at the store or after-sales service.
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Claims
1 . å€éšãšãã«ã®ãŒãé»æ°ãšãã«ã®ãŒã«å€æããŠé»åãäŸçµŠããçºé»éšãšã åèšçºé»éšã«ãã£ãŠäŸçµŠãããé»åãèé»ããèé»éšæãšã
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JPH09171086A (ja) * | 1988-01-25 | 1997-06-30 | Seiko Epson Corp | çºé»è£ 眮ä»é»åè æèš |
DE19814178A1 (de) * | 1997-03-31 | 1998-10-15 | Seiko Instr Inc | Hochgenaue Uhr |
JPH1189121A (ja) * | 1997-09-01 | 1999-03-30 | Seiko Epson Corp | å°åçºé»æ©åã³ãããåããæºåž¯é»åæ©åš |
-
2000
- 2000-03-31 WO PCT/JP2000/002089 patent/WO2000060419A1/ja active Application Filing
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63291296A (ja) * | 1987-05-22 | 1988-11-29 | Sharp Corp | äžæ®çºæ§åå°äœã¡ã¢ãªè£ 眮 |
JPS63292497A (ja) * | 1987-05-25 | 1988-11-29 | Nec Corp | äžæ®çºæ§åå°äœã¡ã¢ãªè£ 眮 |
JPS641472A (en) * | 1987-06-22 | 1989-01-05 | Seiko Epson Corp | Booster circuit |
JPH09171086A (ja) * | 1988-01-25 | 1997-06-30 | Seiko Epson Corp | çºé»è£ 眮ä»é»åè æèš |
JPH0589689A (ja) * | 1991-03-18 | 1993-04-09 | Mitsutoyo Corp | ïŒ¥ïœ ïœïœïœïœã®æžèŸŒé»å§çºçåè·¯ |
DE19814178A1 (de) * | 1997-03-31 | 1998-10-15 | Seiko Instr Inc | Hochgenaue Uhr |
JPH1189121A (ja) * | 1997-09-01 | 1999-03-30 | Seiko Epson Corp | å°åçºé»æ©åã³ãããåããæºåž¯é»åæ©åš |
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