JP3169938B2 - Power supply voltage adjustment method and device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power supply voltage adjusting method and apparatus for automating load-side voltage correction, and more particularly to a method for supplying power from a single power supply to a load having a plurality of voltage detection points. The present invention relates to a power supply voltage adjusting method and apparatus.

[0002]

2. Description of the Related Art Generally, when power is supplied from a power supply device to a load, a voltage drop due to a connection path between the power supply and the load,
Variation from the proper voltage value occurs depending on the number and type of loads. Conventionally, the following technique has been used to correct this.

For example, in Japanese Patent Application Laid-Open No. 08-016260 (hereinafter referred to as a first conventional technique), a voltage on a load side is measured by a sensor, and the digitized measured voltage value is supplied to a power supply unit. A technique is disclosed in which the power supply unit transmits the power and adjusts the power supply voltage by comparing the measured voltage with a reference voltage supplied to a load.

In Japanese Patent Application Laid-Open No. 02-170210 (hereinafter referred to as a second prior art), a load provided with a plurality of boards is provided near a power supply path for supplying a voltage to each board. A technology in which a voltage detection line is provided for each power supply line, each voltage detection line is connected to a power supply line via a resistor, and a voltage obtained via the resistance is fed back to the power supply device via the voltage detection line to adjust a supply voltage. Is disclosed.

[0005]

However, the above-mentioned prior art has the following problems.

[0006] In the first prior art, the load side 1
Since the control is performed on the voltage detection points at the locations, there is a problem that it is not possible to cope with the case where, for example, a voltage detection point is provided on each of a plurality of boards of the load and the voltage of each board is adjusted.

In the second prior art, since the voltage detection lines for each board are connected, the average voltage value obtained by averaging the load variation of each board is used as the feedback voltage. There is a problem that a sufficient voltage cannot be supplied to a board having a large load, that is, a board having a significantly large voltage drop compared to other boards.

According to the present invention, when power is supplied from a single power supply device to a load having a plurality of voltage detection points, a board having a large load, that is, a board having a significantly large voltage drop compared to other boards, is provided. It is another object of the present invention to provide a power supply voltage adjusting method and apparatus capable of supplying a sufficient voltage.

[0009]

According to a first power supply voltage adjusting method of the present invention, a feedback of a load voltage measured at an arbitrary position of a load is received, and the load voltage is compared with a preset reference value. A power supply voltage adjustment method in an electronic device including a power supply device that adjusts a voltage supplied to the load according to the comparison result, wherein the power supply voltage is detected at a plurality of locations on the load or at voltage detection points on a plurality of boards. A plurality of load voltage values are compared with a preset threshold value, and when there are a plurality of load voltage values smaller than the threshold value, the threshold value is sequentially changed to a smaller value to change the load voltage value. By repeating the comparison with the above, the load voltage value smaller than the changed threshold value is narrowed down to one, and the narrowed down load voltage value is transmitted to the power supply device.

According to a second power supply voltage adjusting method of the present invention, a feedback of a load voltage measured at an arbitrary position of a load is received, the load voltage is compared with a preset reference value, and the comparison result is obtained. A power supply voltage adjustment method for an electronic device including a power supply device that adjusts a voltage supplied to the load in accordance with the load voltage, wherein each load voltage value corresponds to a plurality of locations of the load or voltage detection points of a plurality of boards. And comparing each of the plurality of load voltage values with a preset threshold value, and if the voltage value is smaller than the threshold value, the load voltage value is made to correspond to each of the voltage detection points. A second step of transmitting the interrupt signal, a third step of checking whether or not the interrupt signal has been received, and a step of detecting a predetermined voltage detection point when no interrupt signal has been received. A fourth step of transmitting a load voltage value to the power supply device; a fifth step of detecting whether there is a plurality of interrupt signals when the interrupt signal is received; A sixth step of sending a load voltage value at a corresponding voltage detection point to the power supply device, and a seventh step of changing the threshold value to a smaller value when there are a plurality of interrupt signals;
After the seventh step, return to the second step,
The seventh step until the interrupt signal becomes one,
An eighth step in which a second step, a third step, a fifth step, and a sixth step are repeated, and when the interrupt signal is narrowed down to one as a result of the eighth step, the narrowing down is performed. A ninth step of sending a load voltage value at a voltage detection point corresponding to one interrupt signal to the power supply device.

According to a third power supply voltage adjusting method of the present invention, a feedback of a load voltage measured at an arbitrary position of a load is received, the load voltage is compared with a preset reference value, and the comparison result is obtained. A power supply voltage adjustment method for an electronic device including a power supply device that adjusts a voltage supplied to the load in accordance with the load voltage, wherein each load voltage value corresponds to a plurality of locations of the load or voltage detection points of a plurality of boards. And comparing each of the plurality of load voltage values with a preset threshold value, and if the voltage value is smaller than the threshold value, the load voltage value is made to correspond to each of the voltage detection points. A second step of transmitting the interrupt signal, a third step of checking whether or not the interrupt signal has been received, and a step of detecting a predetermined voltage detection point when no interrupt signal has been received. A fourth step of transmitting a load voltage value to the power supply device; a fifth step of detecting whether there is a plurality of interrupt signals when the interrupt signal is received; A sixth step of transmitting a load voltage value at a corresponding voltage detection point to the power supply device, and when there are a plurality of interrupt signals, a priority order of the voltage detection points set in advance in priority. A seventh step of checking for the presence or absence of an interrupt signal at the highest voltage detection point, and in the seventh step, when an interrupt signal is present, the load voltage value at the corresponding voltage detection point is determined by the power supply device. In the eighth step and the seventh step, when there is no interrupt signal, it is checked whether or not there is an interrupt signal at the next priority voltage detection point. A ninth step of sequentially checking for the presence or absence of an interrupt signal at the next priority voltage detection point until the signal is output, and sending the load voltage value at the corresponding voltage detection point to the power supply when the interrupt signal is present. And characterized in that:

According to a fourth power supply voltage adjusting method of the present invention, a feedback of a load voltage measured at an arbitrary position of a load is received, the load voltage is compared with a predetermined reference value, and the comparison result is obtained. A power supply voltage adjustment method for an electronic device including a power supply device that adjusts a voltage supplied to the load in accordance with the load voltage, wherein each load voltage value corresponds to a plurality of locations of the load or voltage detection points of a plurality of boards. And comparing each of the plurality of load voltage values with a preset threshold value, and if the voltage value is smaller than the threshold value, the load voltage value is made to correspond to each of the voltage detection points. A second step of transmitting the interrupt signal, a third step of checking whether or not the interrupt signal has been received, and a step of detecting a predetermined voltage detection point when no interrupt signal has been received. A fourth step of transmitting a load voltage value to the power supply device; a fifth step of detecting whether there is a plurality of interrupt signals when the interrupt signal is received; A sixth step of transmitting a load voltage value at a corresponding voltage detection point to the power supply device, and, when there are a plurality of the interrupt signals, a load voltage value of the voltage detection point corresponding to the plurality of interrupt signals. The method includes a seventh step of comparing and determining a minimum load voltage value, and an eighth step of sending the minimum load voltage value to the power supply device.

According to a fifth power supply voltage adjusting method of the present invention, in the first to fourth power supply voltage adjusting methods of the present invention, an arbitrary value is set as the threshold value for each of the voltage detection points. It is characterized by.

The first power supply voltage adjusting device according to the present invention receives feedback of a load voltage measured at an arbitrary position of a load, compares the load voltage with a predetermined reference value, and compares the load voltage with a predetermined reference value. A power supply voltage adjustment device in an electronic device including a power supply device that adjusts a voltage supplied to the load according to a plurality of load voltage values detected at a plurality of locations of the load or at a voltage detection point of a plurality of boards. Means for comparing with a preset threshold value, and when there are a plurality of load voltage values smaller than the threshold value, the threshold value is sequentially changed to a smaller value to compare with the load voltage value. It is characterized by having a means for narrowing down the load voltage value smaller than the changed threshold value to one by repeating, and a means for sending out the load voltage value thus narrowed down to the power supply device.

The second power supply voltage adjusting device according to the present invention receives feedback of a load voltage measured at an arbitrary position of a load, compares the load voltage with a preset reference value, and compares the load voltage with a predetermined reference value. A power supply voltage adjustment device in an electronic device including a power supply device that adjusts a voltage supplied to the load in accordance with the load voltage value corresponding to a plurality of locations of the load or voltage detection points of a plurality of boards. A plurality of voltage detecting means, a plurality of digital converting means for converting each of the load voltage values detected by the plurality of voltage detecting means into a digital value, and a load voltage value converted into the digital value and preset. A plurality of voltage comparing means for respectively generating an interrupt signal in association with the voltage detection point when the load voltage value is smaller than the threshold value; When no interrupt signal is received from the voltage comparison means, the selection means is notified to send a load voltage value at a preset voltage detection point to the power supply device, and when one interrupt signal is received. Informs the selection means to transmit a load voltage value at a corresponding voltage detection point to the power supply device, and when a plurality of the interrupt signals are received, the threshold value is set until the interrupt signal becomes one. The voltage comparison means is instructed to sequentially change the voltage to a smaller value and compare the voltages, and when the interrupt signal from the voltage comparison means is narrowed down to one, the voltage detection point corresponding to the narrowed down interrupt signal A highest priority interrupt signal determining means for notifying the selecting means to transmit a load voltage value to the power supply device, and a load voltage value corresponding to the plurality of voltage detection points to the voltage. With receiving from the output means or said digital conversion means, characterized by having a selection means for delivering the to the power supply by selecting the highest priority interrupt signal determining means indicated load voltage value from.

A third power supply voltage adjusting device according to the present invention receives feedback of a load voltage measured at an arbitrary place of a load, compares the load voltage with a predetermined reference value, and compares the comparison result with the preset reference value. A power supply voltage adjustment device in an electronic device including a power supply device that adjusts a voltage supplied to the load in accordance with the load voltage value corresponding to a plurality of locations of the load or voltage detection points of a plurality of boards. A plurality of voltage detecting means, a plurality of digital converting means for converting each of the load voltage values detected by the plurality of voltage detecting means into a digital value, and a load voltage value converted into the digital value and preset. A plurality of voltage comparing means for respectively generating an interrupt signal in association with the voltage detection point when the load voltage value is smaller than the threshold value; When no interrupt signal is received from the voltage comparison means, the selection means is notified to send a load voltage value at a preset voltage detection point to the power supply device, and when one interrupt signal is received. Informs the selecting means to transmit the load voltage value at the corresponding voltage detection point to the power supply device, and when a plurality of the interrupt signals are received, an interrupt signal having the highest priority set in advance from among the interrupt signals. And the highest priority interrupt signal determining means for notifying the selecting means to send the load voltage value at the voltage detection point corresponding to the selected interrupt signal to the power supply device, and corresponding to the plurality of voltage detection points. Receiving the load voltage value from the voltage detection means or the digital conversion means, and selecting the load voltage value specified by the highest priority interrupt signal determination means. It characterized by having a selection means for sending to the power supply.

A fourth power supply voltage adjusting device according to the present invention receives feedback of a load voltage measured at an arbitrary position of a load, compares the load voltage with a preset reference value, and compares the load voltage with a predetermined reference value. A power supply voltage adjustment device in an electronic device including a power supply device that adjusts a voltage supplied to the load in accordance with the load voltage value corresponding to a plurality of locations of the load or voltage detection points of a plurality of boards. A plurality of voltage detecting means, a plurality of digital converting means for converting each of the load voltage values detected by the plurality of voltage detecting means into a digital value, and a load voltage value converted into the digital value and preset. A plurality of voltage comparing means for respectively generating an interrupt signal in association with the voltage detection point when the load voltage value is smaller than the threshold value; When no interrupt signal is received from the voltage comparison means, the selection means is notified to send a load voltage value at a preset voltage detection point to the power supply device, and when one interrupt signal is received. Informs the selecting means to transmit a load voltage value at a corresponding voltage detection point to the power supply device, and when a plurality of the interrupt signals are received, loads of the voltage detection points corresponding to the plurality of interrupt signals are received. A highest-priority interrupt signal determining means for comparing the voltage values to select a minimum load voltage value and notifying the selecting means to send the selected load voltage value to the power supply device; and the plurality of voltage detection points. Receiving the load voltage value corresponding to the voltage detection means or the digital conversion means, and selecting the load voltage value instructed from the highest priority interrupt signal determination means, It characterized by having a selection means for sending to the source device.

According to a fifth power supply voltage adjusting device of the present invention, in the first to fourth power supply voltage adjusting devices of the present invention, the threshold value is set to an arbitrary value for each of the voltage detection points. It is characterized by.

[0019]

Embodiments of the present invention will be described with reference to the drawings.

First, a first embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of the first to third embodiments of the present invention.
, A load 2, and a power supply device 3 are shown.

The load 2 includes a plurality of boards 21, 22, 2,
3 are included, and a voltage detection point is provided for each board. These boards 21, 22 and 23 are operated by supplying the same voltage from one power supply device 3.
The number of boards is not particularly limited, but is described here as three boards shown in FIG. 1 for convenience of explanation. Also,
Although the voltage detection points are also provided for each board in FIG. 1, the present invention is not limited to this, and a plurality of voltage detection points may be provided on the same board, or may be provided at a plurality of places even in a load not divided into a plurality of boards.

The power supply voltage adjusting device 1 includes a voltage / interrupt signal generator 11 and a selection controller 12.

The voltage / interrupt signal generator 11 includes voltage sensors 111, 112, 113 for detecting voltage values at respective voltage detection points of the boards 21, 22, 23, and voltage values at respective voltage detection points, ie, A / D converters (analog / digital converters) 112, 115 and 118 for digitally converting the outputs of the voltage sensors,
The output of the D converter is compared with the threshold value, and when the voltage value at each voltage detection point, that is, the output of each A / D converter is smaller than the threshold value, the highest priority interrupt signal determination circuit 1
21 are provided with voltage comparators 113, 116 and 119 for outputting interrupt signals W1, W2 and W3, respectively. The output of each voltage sensor is a voltage signal V
1, V2, and V3 are also output to the selection circuit 122.

A plurality of thresholds are prepared in each voltage comparison unit, and these thresholds are sequentially switched to smaller values under the control of the highest-priority interrupt signal determination circuit 121 for use. In the present invention, since it is assumed that a voltage lowered due to a voltage drop or the like is boosted, all thresholds are set to values smaller than the appropriate voltage of the board.
The threshold value is basically set to the same value for all boards, but may be set to a different value for each board according to the type of the board.

The selection control unit 12 includes a voltage comparison unit 113,
116, 119, the interrupt signals W1, W2,
A selection circuit 122 selects one of W3 and selects a board voltage signal corresponding to the selected interrupt signal.
, And the voltage signal V input from the voltage sensors 111, 114, and 117.
1, V2, V3, the highest priority interrupt signal determination circuit 1
And a selection circuit 122 that outputs one voltage signal designated by the control signal 21 to the power supply device 3 as a voltage signal V.

The power supply device 3 adjusts its own output voltage based on the voltage signal V input from the selection circuit 122 and supplies the adjusted voltage to the load 2. The power supply device 3 is a power supply device capable of adjusting a voltage to be output to a load according to a difference between a feedback load voltage and a preset reference voltage of the power supply device itself. Since it is also not the gist of the present invention, its details are omitted.

Next, the operation of the first embodiment of the present invention will be described in detail with reference to FIGS.

FIG. 2 is a flowchart showing the operation of the first embodiment of the present invention, and FIG. 3 is a flowchart supplementing the operation of the first embodiment of the present invention shown in FIG.

First, when the power supply from the power supply 3 to the load 2 is started, the voltage sensors 111, 114, 117
Starts detection of the voltage at the corresponding voltage detection point. Then, the detected voltages at the respective voltage detection points are sent to the selection circuit 122 as voltage signals V1, V2, and V3, respectively, and the A / D conversion units 112, 115, and 118 are also provided.
Are converted into digital values. This voltage detection, transmission, and conversion into a digital value are continued as long as power is supplied from the power supply device 3. (Step S1 in FIG. 2).

The voltage comparators 113, 116 and 119 compare the voltage at each voltage detection point converted into a digital value in step S1 with a threshold value, and the voltage at each voltage detection point is greater than the threshold value. If the value is small (for example, the voltage at the voltage detection point is 4.4 with respect to the threshold value of 4.5 V)
V), and sends the corresponding interrupt signals W1, W2, W3 to the highest priority interrupt signal determination circuit 121. If the voltage at the voltage detection point is higher than the threshold value (for example, the voltage at the voltage detection point is 4.8 V with respect to the threshold value of 4.5 V), a voltage sufficient for the operation of the board is obtained. No interrupt signal is sent assuming that it is supplied. The digitized voltage at the voltage detection point is held until a selection end signal is sent from the selection circuit (step S2).

The highest-priority interrupt signal determination circuit 121 outputs the interrupt signal W from each of the voltage comparators 113, 116 and 119.
The presence or absence of 1, W2 and W3 is checked (step S
3).

As a result of the check in step S3, if there is no interrupt signal W1, W2, W3, the highest priority interrupt signal determining circuit 121 determines the voltage signal of a predetermined specific board (for example, the board 21). The selection circuit 122 instructs the selection circuit 122 to select the voltage signal V1), and the selection circuit 122 sends the specified signal to the power supply device 3 as the voltage signal V. The voltage signal V is one of the voltage signals V1, V2, and V3 selected by the selection circuit 122, and here corresponds to the voltage signal V1. Thereafter, the power supply device 3 adjusts its own output voltage based on the voltage signal V input from the selection circuit 122, and supplies the adjusted voltage to the load 2 (Step S4).

If the result of the check in step S3 is that there is an interrupt signal, the highest priority interrupt signal determination circuit 1
21 checks whether there are a plurality of interrupt signals (step S5).

In step S5, when there are a plurality of interrupt signals, the highest priority interrupt signal determination circuit 121
Transmits the threshold change signal S to each of the voltage comparison units 113 and 11
6, 119. Upon receiving the threshold value change signal S, each of the voltage comparison units 113, 116, and 119 switches to a threshold value smaller than the current threshold value (for example, changing the threshold value 4.5V in step S2 to 4). 0.3 V), and again compares the digitized voltage at the voltage detection point with the switched threshold value (4.3 V). The switching of the threshold value is performed, for example, at 4.5 V, 4.3 V, 4.1 V,
A voltage such as 4.0 V is prepared as a threshold value,
Each time the threshold change signal S is received, the voltage changes from 4.5 V to 4.3 V.
The voltage is sequentially switched from 4.1 V to 4.0 V (step S6).

As a result of the re-comparison with the threshold value switched in step S6, the highest priority interrupt signal determination circuit 121 returns to step S2 to check whether or not there are a plurality of interrupt signals. Step S2 → Step S3 → Step S5 is repeated (Step S6 → Step S2).

When there is only one interrupt signal,
The highest priority interrupt signal determination circuit 121 instructs the selection circuit 122 to select a voltage signal of the board corresponding to the one interrupt signal, and the selection circuit 122 sends the specified signal to the power supply device 3 as a voltage signal V. I do. Thereafter, the power supply device 3 adjusts its own output voltage based on the voltage signal V input from the selection circuit 122, and supplies the adjusted voltage to the load 2 (Step S7).

After the selection is completed in step S4 or step S7, the selection circuit 122 outputs the voltage
A selection end signal E is sent to 3, 116 and 119. Each of the voltage comparison units 113 and 11 receiving the selection end signal E
6, 119 initializes the threshold value (for example, step S
6, the voltage (digital value) of the corresponding voltage detection point at that time is taken in, and step S
2 and the operations of steps S2 to S8 are repeated (step S8).

Next, step S6 → step S2 in FIG.
→ Repeat operation of step S3 → step S5
A supplementary explanation will be given with reference to FIG. In step S6 in FIG. 2, the threshold value is sequentially switched to a smaller value in order to narrow down to one when there are a plurality of interrupt signals. For example, if there are two interrupt signals and their respective voltages are 4,
It is assumed that the voltages are 4V and 4.2V. In this case, an interrupt signal was generated in the first comparison with the threshold value of 4.5 V because both were smaller than 4.5 V. However, when the threshold value was switched to 4.3 V and the comparison was performed again, the 4.2 V was lower. Only 4.3V
Since it is smaller, an interrupt signal is generated, and as a result, the interrupt signal is narrowed down to one.

However, depending on the combination of the voltage of each board 21, 22, and 23 and the threshold value, step S in FIG.
Even if step 6 → step S2 → step S3 → step S5 is repeated, the interrupt signal may not be narrowed down to one, and may be reduced from a plurality to zero. The flowchart in FIG. 3 explains the operation in such a case. Steps S3 and S5 in FIG. 3 are the same as steps S3 and S5 in FIG.

After step S5, the highest-priority interrupt signal determination circuit 121 sends the threshold change signal S to each of the voltage comparators 11
3, 116, 119. Each of the voltage comparison units 113, 116, and 119, which has received the threshold value change signal S, switches to a threshold value smaller than the current threshold value (for example, the threshold value is changed from 4.5V to 4.3V). Then, the voltage at the voltage detection point digitized again is compared with the switched threshold value (4.3 V) (step S61).

The highest priority interrupt signal determination circuit 121 checks whether there are a plurality of interrupt signals as a result of the re-comparison with the switched threshold value in step S61 (step S62).

As a result of step S62, if there are still a plurality, the highest priority interrupt signal determination circuit 121 sends the threshold change signal S to each of the voltage comparison units 113, 116, and 119, and each of the voltage comparison units 113, 116 , 119 are switched to a threshold value smaller than the current threshold value (for example, the threshold value is changed from 4.3 V to 4.1 V), and is switched again to the voltage of the digitized voltage detection point. The threshold value (4.1 V) is compared (step S63).

The highest priority interrupt signal determination circuit 121 checks whether there are a plurality of interrupt signals as a result of the re-comparison with the switched threshold value in step S63 (step S64).

If the result of step S64 is that the interrupt signal has become zero, the highest priority interrupt signal determination circuit 121
Sends a threshold change signal S for returning the threshold value to the previous threshold value to each of the voltage comparison units 113, 116, and 119. Each of the voltage comparison units 113, 116, and 119 outputs the current threshold value of 4.1V.
Is switched to the immediately preceding threshold value of 4.3 V, and an interrupt signal is sent to the highest priority interrupt signal determination circuit 121 (step S6).
5).

After step S65, the process returns to step S62, and there are a plurality of interrupt signals. Next, the highest priority interrupt signal determination circuit 121 outputs the interrupt signal W
1 is checked (step S66), and if there is, the selection circuit 122 is instructed to select the voltage signal V1 of the board 21 corresponding to the interrupt signal W1 (step S6).
9).

In step S66, the interrupt signal W1
Is not present, the highest priority interrupt signal determination circuit 121
Checks whether there is an interrupt signal W2 (step S67), and if so, the board 2 corresponding to the interrupt signal W2.
The selection circuit 122 is instructed to select the second voltage signal V2 (step S69).

In step S67, the interrupt signal W2
Is not present, the highest priority interrupt signal determination circuit 121
Checks whether there is an interrupt signal W3 (step S68), and if so, the board 2 corresponding to the interrupt signal W3
The selection circuit 122 is instructed to select the third voltage signal V3 (step S69).

As described above, when the interrupt signal is changed from a plurality to zero as a result of changing the threshold value, the interrupt signal is returned to the immediately preceding threshold value, the interrupt signal is returned to a plurality, and the priority (FIG.
In, the control is performed so as to select the interrupt signal having the highest interrupt signal 1 → 2 → 3).

Next, a second embodiment of the present invention will be described in detail with reference to FIGS.

FIG. 4 is a flowchart showing the operation of the second embodiment of the present invention. Note that step S in FIG.
Steps S11 to S14 are the same as steps S1 to S4 in FIG. 2 showing the operation of the above-described first embodiment of the present invention, and a description thereof will be omitted.
Steps S20 to S20 will be described.

If there is an interrupt signal as a result of the check in step S13, the highest priority interrupt signal determination circuit 121 checks whether or not there are a plurality of interrupt signals (step S15).

When there are a plurality of interrupt signals, the highest-priority interrupt signal determining circuit 121 first checks whether or not there is an interrupt signal W1 (step S16), and if there is, the board 21 corresponding to the interrupt signal W1. The selection circuit 122 is instructed to select the voltage signal V1 (step S19).

In step S16, the interrupt signal W1
Is not present, the highest priority interrupt signal determination circuit 121
Checks whether there is an interrupt signal W2 (step S17). If there is, the board 2 corresponding to the interrupt signal W2
The selection circuit 122 is instructed to select the second voltage signal V2 (step S19).

In step S17, the interrupt signal W2
Is not present, the highest priority interrupt signal determination circuit 121
Checks whether there is an interrupt signal W3 (step S18). If there is, the board 2 corresponding to the interrupt signal W3
The selection circuit 122 is instructed to select the third voltage signal V3 (step S19).

After the selection is completed in step S14 or S19, the selection circuit 122 sends a selection end signal E to each of the voltage comparison units 113, 116 and 119. Each of the voltage comparison units 113 and 1 receiving the selection end signal E
16 and 119 take in the voltage (digital value) of the corresponding voltage detection point at that time, return to step S12, and repeat the operation of steps S12 to S20 (step S20).

As described above, in the second embodiment of the present invention, the interrupt signal having the highest priority (in FIG. 4, the order of interrupt signals 1 → 2 → 3) is selected. Controlling. Therefore, as in the first embodiment of the present invention, when there are a plurality of interrupt signals, there is no need to control the threshold value to be changed to one. Therefore, the voltage comparison units 113 and 11 shown in FIG.
6, 119, only one threshold value is required, and therefore, the threshold value change signal S shown in FIG.
Is also unnecessary.

Next, a third embodiment of the present invention will be described in detail with reference to FIGS.

FIG. 5 is a flowchart showing the operation of the third embodiment of the present invention. Note that step S in FIG.
Steps S21 to S24 are the same as steps S1 to S4 in FIG. 2 showing the operation of the above-described first embodiment of the present invention, and a description thereof will be omitted.
Steps S28 to S28 will be described.

If there is an interrupt signal as a result of the check in step S23, the highest priority interrupt signal determination circuit 121 checks whether or not there are a plurality of interrupt signals (step S25).

When there are a plurality of interrupt signals, the highest-priority interrupt signal determination circuit 121 takes in the voltage signals corresponding to the interrupt signals from the selection circuit 122 and compares the voltage signals to determine the minimum voltage value. Decide what. (Step S26).

Next, the highest priority interrupt signal decision circuit 121
Instructs the selection circuit 122 to select the voltage signal having the minimum voltage value determined in step S26.
2 sends the instructed signal to the power supply device 3 as a voltage signal V. If there is only one interrupt signal in step S25, the selection circuit 122 is instructed to select a voltage signal corresponding to the interrupt signal. (Step S27).

After the selection is completed in step S24 or step S27, the selection circuit 122 sends a selection end signal E to each of the voltage comparison units 113, 116 and 119. Each of the voltage comparison units 113 and 1 receiving the selection end signal E
16, 119 take in the voltage (digital value) of the corresponding voltage detection point at that time, return to step S22, and repeat the operation of steps S22 to S28 (step S28).

As described above, in the third embodiment of the present invention, control is performed so as to select the voltage signal having the minimum value. Therefore, as in the first embodiment of the present invention, when there are a plurality of interrupt signals, control is performed to change the threshold value to narrow down to one, and it is shown in the second embodiment of the present invention. There is no need to control the priority order. Therefore, the voltage comparison units 113, 116, 11 shown in FIG.
9, only one threshold is required for each,
Therefore, the threshold value change signal S shown in FIG. 1 is not required.

Next, a fourth embodiment of the present invention will be described with reference to FIG.

FIG. 6 is a block diagram showing the configuration of the fourth embodiment of the present invention. The difference from FIG. 1 is that the voltages converted into digital values by A / D converters 112, 115 and 118 are different from those of FIG. The point is that the signals V1, V2, and V3 are sent to the selection circuit 122. The present embodiment is applied to a power supply device 3 that can adjust a supply voltage by receiving a digital voltage value.

[0067]

As described above, according to the present invention, when power is supplied from a power supply to a load having a plurality of voltage detection points, the load voltage is detected at the plurality of voltage detection points, and the threshold is determined. From the load voltage smaller than the value, the minimum voltage value or the load voltage value of the voltage detection point with the highest priority is selected, and the supply voltage to the load is adjusted based on this voltage value. That is, there is an effect that a sufficient voltage can be supplied to a board having a large voltage drop compared to other boards.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of first to third embodiments of the present invention.

FIG. 2 is a flowchart showing an operation of the first exemplary embodiment of the present invention.

FIG. 3 is a flowchart for supplementing the operation of the first embodiment of the present invention in FIG. 2;

FIG. 4 is a flowchart illustrating an operation of the second exemplary embodiment of the present invention.

FIG. 5 is a flowchart illustrating an operation of the third exemplary embodiment of the present invention.

FIG. 6 is a block diagram showing a configuration of a fourth exemplary embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 power supply voltage adjusting device 11 voltage / interrupt signal generation unit 111, 114, 117 voltage sensor 112, 115, 118 A / D conversion unit 113, 116, 119 voltage comparison unit 12 selection control unit 121 top priority interrupt signal determination circuit 122 selection Circuit 2 Load 21, 22, 23 Board 3 Power supply E Selection end signal S Threshold change signal V, V1, V2, V3 Voltage signal W1, W2, W3 Interrupt signal

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G05F 1/10 G06F 1/26

Claims (10)

(57) [Claims] 1. A feedback of a load voltage measured at an arbitrary position of a load, a comparison between the load voltage and a preset reference value, and adjustment of a voltage supplied to the load according to a result of the comparison. A power supply voltage adjustment method for an electronic device including a power supply device, comprising: comparing a plurality of load voltage values detected at a plurality of locations of the load or voltage detection points of a plurality of boards with a preset threshold value. When there are a plurality of load voltage values smaller than the threshold value, by sequentially changing the threshold value to a smaller value and repeating the comparison with the load voltage value,
A power supply voltage adjusting method, wherein a load voltage value smaller than the changed threshold value is narrowed down to one, and the narrowed down load voltage value is transmitted to the power supply device. 2. Receiving feedback of a load voltage measured at an arbitrary position of a load, comparing the load voltage with a predetermined reference value, and adjusting a voltage supplied to the load according to the comparison result. A power supply voltage adjusting method for an electronic device including a power supply device, wherein a first step of detecting respective load voltage values corresponding to a plurality of locations of the load or voltage detection points of a plurality of boards; A second step of comparing each of the plurality of load voltage values with a preset threshold value and transmitting an interrupt signal corresponding to each of the voltage detection points when the voltage value is smaller than the threshold value A third step of checking whether or not the interrupt signal has been received; and, if no interrupt signal has been received, transmitting a load voltage value at a preset voltage detection point to the power supply device. A fourth step of detecting whether there is a plurality of interrupt signals when the interrupt signal is received, and a load voltage value at a corresponding voltage detection point when the number of interrupt signals is one. A sixth step of sending the threshold value to the power supply device; a seventh step of changing the threshold value to a smaller value if there are a plurality of the interrupt signals; and Return to the second step,
The seventh step until the interrupt signal becomes one,
An eighth step in which a second step, a third step, a fifth step, and a sixth step are repeated; and, as a result of the eighth step, when the interrupt signal is narrowed down to one, the narrowed down is performed. Ninth step of sending a load voltage value at a voltage detection point corresponding to one interrupt signal to the power supply device. 3. Receiving feedback of a load voltage measured at an arbitrary position of a load, comparing the load voltage with a predetermined reference value, and adjusting a voltage supplied to the load according to the comparison result. A power supply voltage adjusting method for an electronic device including a power supply device, wherein a first step of detecting respective load voltage values corresponding to a plurality of locations of the load or voltage detection points of a plurality of boards; A second step of comparing each of the plurality of load voltage values with a preset threshold value and transmitting an interrupt signal corresponding to each of the voltage detection points when the voltage value is smaller than the threshold value A third step of checking whether or not the interrupt signal has been received; and, if no interrupt signal has been received, transmitting a load voltage value at a preset voltage detection point to the power supply device. A fourth step of detecting whether there is a plurality of interrupt signals when the interrupt signal is received, and a load voltage value at a corresponding voltage detection point when the number of interrupt signals is one. A sixth step of sending the interrupt signal to the power supply device; and when there are a plurality of interrupt signals, an interrupt signal of the highest priority voltage detection point among the voltage detection points set in advance in priority. A seventh step of checking whether or not there is a load signal; and, in the seventh step, sending out a load voltage value at a corresponding voltage detection point to the power supply device when there is an interrupt signal; In the seventh step, when there is no interrupt signal, the presence or absence of the interrupt signal at the next priority voltage detection point is checked, and thereafter, the next priority voltage is detected until the interrupt signal is detected. Ninth step of sequentially checking the presence or absence of an interrupt signal at the detection point, and sending a load voltage value at a corresponding voltage detection point to the power supply device when the interrupt signal is present. Voltage adjustment method. 4. Receiving feedback of a load voltage measured at an arbitrary position of a load, comparing the load voltage with a predetermined reference value, and adjusting a voltage supplied to the load according to the comparison result. A power supply voltage adjusting method for an electronic device including a power supply device, wherein a first step of detecting respective load voltage values corresponding to a plurality of locations of the load or voltage detection points of a plurality of boards; A second step of comparing each of the plurality of load voltage values with a preset threshold value and transmitting an interrupt signal corresponding to each of the voltage detection points when the voltage value is smaller than the threshold value A third step of checking whether or not the interrupt signal has been received; and, if no interrupt signal has been received, transmitting a load voltage value at a preset voltage detection point to the power supply device. A fourth step of detecting whether there is a plurality of interrupt signals when the interrupt signal is received, and a load voltage value at a corresponding voltage detection point when the number of interrupt signals is one. A step of transmitting the minimum load voltage value to the power supply device, and when there are a plurality of the interrupt signals, comparing the load voltage values at the voltage detection points corresponding to the plurality of interrupt signals to determine a minimum load voltage value. A power supply voltage adjusting method, comprising: a seventh step of determining; and an eighth step of sending the minimum load voltage value to the power supply device. 5. The power supply voltage adjusting method according to claim 1, wherein an arbitrary value is set as said threshold value for each of said voltage detection points. 6. Receiving feedback of a load voltage measured at an arbitrary position of a load, comparing the load voltage with a preset reference value, and adjusting a voltage supplied to the load according to the comparison result. A power supply voltage adjustment device in an electronic device including a power supply device, comprising: comparing a plurality of load voltage values detected at a plurality of locations of the load or voltage detection points of a plurality of boards with a preset threshold value. Means for selecting a load voltage value having a minimum voltage value from load voltage values smaller than the threshold value, and means for sending the selected load voltage value to the power supply device. A power supply voltage adjusting device, comprising: 7. Receiving feedback of a load voltage measured at an arbitrary position of a load, comparing the load voltage with a preset reference value, and adjusting a voltage supplied to the load according to the comparison result. A power supply voltage adjustment device in an electronic device including a power supply device, wherein a plurality of voltage detection means for detecting respective load voltage values corresponding to a plurality of locations of the load or voltage detection points of a plurality of boards, A plurality of digital conversion means for respectively converting the load voltage values detected by the plurality of voltage detection means into digital values, and comparing the load voltage values converted to the digital values with a preset threshold value, A plurality of voltage comparing means for respectively generating an interrupt signal in association with the voltage detection point when the load voltage value is smaller than the threshold value; and If none of receiving notifies the selecting means so as to deliver the load voltage value at the voltage detection point set in advance in the power supply device,
If one interrupt signal is received, the selection unit is notified to send the load voltage value at the corresponding voltage detection point to the power supply device. If a plurality of the interrupt signals are received, the interrupt signal is set to 1 The threshold value is sequentially changed to a smaller value until the number becomes smaller, and the voltage comparator is instructed to compare the voltages. When the interrupt signal from the voltage comparator is narrowed to one, the narrowed 1 First priority interrupt signal determination means for notifying the selection means to send a load voltage value at a voltage detection point corresponding to one interrupt signal to the power supply device, and a load voltage value corresponding to the plurality of voltage detection points to the voltage Selecting means for receiving the load voltage value from the detecting means or the digital converting means and selecting the load voltage value instructed by the highest priority interrupt signal determining means and sending it to the power supply device And a power supply voltage adjusting device. 8. Receiving feedback of a load voltage measured at an arbitrary position of a load, comparing the load voltage with a predetermined reference value, and adjusting a voltage supplied to the load according to the comparison result. A power supply voltage adjustment device in an electronic device including a power supply device, wherein a plurality of voltage detection means for detecting respective load voltage values corresponding to a plurality of locations of the load or voltage detection points of a plurality of boards, A plurality of digital conversion means for respectively converting the load voltage values detected by the plurality of voltage detection means into digital values, and comparing the load voltage values converted to the digital values with a preset threshold value, A plurality of voltage comparing means for respectively generating an interrupt signal in association with the voltage detection point when the load voltage value is smaller than the threshold value; and If none of receiving notifies the selecting means so as to deliver the load voltage value at the voltage detection point set in advance in the power supply device,
If one of the interrupt signals is received, the selection unit is notified to send the load voltage value at the corresponding voltage detection point to the power supply device. The highest priority interrupt signal determining means for selecting the highest priority interrupt signal, and notifying the selection means to transmit a load voltage value at a voltage detection point corresponding to the selected interrupt signal to the power supply device. Receiving a load voltage value corresponding to the plurality of voltage detection points from the voltage detection means or the digital conversion means, selecting a load voltage value instructed by the highest priority interrupt signal determination means, and transmitting the selected load voltage value to the power supply device A power supply voltage adjusting device, comprising: 9. Receiving feedback of a load voltage measured at an arbitrary position of a load, comparing the load voltage with a predetermined reference value, and adjusting a voltage to be supplied to the load according to a result of the comparison. A power supply voltage adjustment device in an electronic device including a power supply device, wherein a plurality of voltage detection means for detecting respective load voltage values corresponding to a plurality of locations of the load or voltage detection points of a plurality of boards, A plurality of digital conversion means for respectively converting the load voltage values detected by the plurality of voltage detection means into digital values, and comparing the load voltage values converted to the digital values with a preset threshold value, A plurality of voltage comparing means for respectively generating an interrupt signal in association with the voltage detection point when the load voltage value is smaller than the threshold value; and If none of receiving notifies the selecting means so as to deliver the load voltage value at the voltage detection point set in advance in the power supply device,
If one of the interrupt signals is received, the selection unit is notified to send the load voltage value at the corresponding voltage detection point to the power supply device. If a plurality of the interrupt signals are received, the plurality of interrupt signals are output. The highest priority interrupt signal is determined by comparing the load voltage value at the voltage detection point corresponding to the minimum load voltage value and notifying the selection means to transmit the selected load voltage value to the power supply device. Means for receiving a load voltage value corresponding to the plurality of voltage detection points from the voltage detection means or the digital conversion means, and selecting a load voltage value instructed by the highest priority interrupt signal determination means to select the power supply device. A power supply voltage adjusting device, comprising: a selection unit that sends the power supply voltage to the power supply voltage adjusting device. 10. The power supply voltage adjusting device according to claim 6, wherein the threshold value is set to an arbitrary value for each of the voltage detection points.