CN101741599B - Network transmission device and power-saving method thereof - Google Patents
Network transmission device and power-saving method thereof Download PDFInfo
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- CN101741599B CN101741599B CN2008101812701A CN200810181270A CN101741599B CN 101741599 B CN101741599 B CN 101741599B CN 2008101812701 A CN2008101812701 A CN 2008101812701A CN 200810181270 A CN200810181270 A CN 200810181270A CN 101741599 B CN101741599 B CN 101741599B
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Abstract
The invention discloses a network transmission device and a power saving method thereof. The network transmission device comprises a chip, a transformer and a power supply adjusting unit. The chip comprises a detection and control unit, a simulation circuit and a digital circuit. The detection and control unit receives an accepting signal and detects the accepting signal and the state of the chip so as to generate a first control signal. The transformer has a primary side and a secondary side and the primary side of the transformer is coupled to the chip. The power supply adjusting unit is coupled to the detection and control unit and a centre tap of the primary side of the transformer for receiving the voltage and generating a first adjusting voltage according to the first control signal, and the first adjusting voltage is connected to one of the centre tap of the primary side of the transformer, the simulation circuit and the digital circuit.
Description
Technical field
The invention relates to a kind of network transmission device, and particularly relevant for a kind of network transmission device and its electricity saving method that is applied to network transmission device.
Background technology
Because the prosperity of electronics technology, computer and various information digitalization equipment are universal day by day, and in order to reach the purpose of resource-sharing, network is necessity configuration that becomes information exchange.In various network configuration; Because Ethernet (Ethernet) has characteristics such as obtain easily, set up convenient and transmission speed is fast; Make that the relevant equipment of Ethernet is flourish, its transmission rate also by 10Mbps evolution to 100Mbps even 1000Mbps.
In the network transmission device of Ethernet, existing network speed can be divided into 10M, 100M and 1000M.And in the transmission course of network signal, whenever network transfer speeds not simultaneously, the transmission voltage of network transmission device is also inequality.For instance, when network transfer speeds during at 10Mbps, the transmission voltage of network transmission device for example is about 2.5 volts (V); When network speed during at 100Mbps, the transmission voltage of network transmission device for example is about ± 1 volt (V); When network transfer speeds during at 1000Mbps, the transmission voltage of network transmission device for example is about ± 1 volt (V) with receive voltage and for example be about ± 1 volt (V) in short-term (shorter cable length) time, and maximum voltage can reach and is about ± 2 volts (V).
Yet; Network transmission device is not all to maintain identical network transfer speeds when carrying out transfer of data always; In order to keep the normal operation of network transmission device; That is let network transmission device can under heterogeneous networks speed, carry out transfer of data, and the maximum voltage value among 3 (network transfer speeds 10Mbps, 100Mbps, the 1000Mbps) then must be provided, also be 2.5 volts.Thus, will cause the too much electric weight of network transmission device consumption.
Summary of the invention
The present invention provides a kind of network transmission device and its electricity saving method, uses to reach purpose of power saving.
The present invention proposes a kind of network transmission device, comprises chip, transformer and power supply adjustment unit.Chip comprises detection and control unit, analog circuit and digital circuit.Detection and control unit carry out following actions: the reception signal that receives and detect the information with network transfer speeds, DC level drift, transmission amplitude and length of transmission line; Produce first control signal; Receive and detect the reception signal of information with signal noise ratio; Produce second control signal, and detect the size of the internal latency of this chip, produce the 3rd control signal.Transformer has primary side and secondary side, and the primary side of this transformer is coupled to chip.The power supply adjustment unit is coupled to the centre cap of the primary side of detection and control unit and transformer; In order to receive voltage; And according to first, second with the 3rd control signal produce accordingly first, second with the 3rd the adjustment voltage; This first adjustment voltage is sent to the centre cap of this primary side of this transformer, and this second adjustment voltage is sent to this analog circuit, and the 3rd adjustment voltage is sent to this digital circuit.
In an embodiment of the present invention, above-mentioned network transmission device also comprises first resistance and second resistance.First end of first resistance is coupled to first end of the primary side of transformer.First end of second resistance is coupled to second end of first resistance, and second end of second resistance is coupled to second end of the primary side of transformer.
In an embodiment of the present invention, above-mentioned voltage is operating voltage.
The present invention proposes a kind of network transmission device, comprises chip, transformer and power supply adjustment unit.Chip comprises detection and control unit, analog circuit and digital circuit.Detect and control unit carries out wherein two kinds of following three kinds of actions: receive and detect the reception signal of information, produce first control signal with network transfer speeds, DC level drift, transmission amplitude and length of transmission line; Receive and detect the reception signal of information, produce second control signal with signal noise ratio; And the size of the internal latency of this chip of detection, produce the 3rd control signal.Transformer has primary side and secondary side, and the primary side of this transformer is coupled to chip.The power supply adjustment unit; Be coupled to the centre cap of this primary side of this detection and control unit and this transformer; In order to receiving voltage, and produce first, second or the 3rd adjustment voltage accordingly according to first, second or the 3rd control signal, this first adjustment voltage is sent to the centre cap of this primary side of this transformer; This second adjustment voltage is sent to this analog circuit respectively, and the 3rd adjustment voltage is sent to this digital circuit.
The present invention proposes a kind of electricity saving method of network transmission device, and this network transmission device has chip and transformer, and chip has analog circuit and digital circuit.Above-mentioned electricity saving method comprises the following steps.At first, receive signal.Afterwards; Carry out following actions: receive and detect reception information with network transfer speeds, DC level drift, transmission amplitude and length of transmission line; Produce first control signal, receive and detect the reception information of information, produce second control signal with signal noise ratio; And the size of the internal latency of this chip of detection, produce the 3rd control signal.Then; Produce first, second and the 3rd adjustment voltage accordingly according to first, second and the 3rd control signal; Wherein, This first adjustment voltage is sent to the centre cap of the primary side of this transformer, and this second adjustment voltage is sent to this analog circuit, and the 3rd adjustment voltage is sent to this digital circuit.
The present invention proposes a kind of electricity saving method of network transmission device, and this network transmission device has chip and transformer, and chip has analog circuit and digital circuit.Above-mentioned electricity saving method comprises the following steps.At first, receive signal.Afterwards; Carry out wherein two kinds of following three kinds of actions: receive and detect reception information with network transfer speeds, DC level drift, transmission amplitude and length of transmission line; Produce first control signal, receive and detect the reception information of information, produce second control signal with signal noise ratio; And the size of the internal latency of this chip of detection, produce the 3rd control signal.Then; Produce first, second or the 3rd adjustment voltage respectively according to first, second or the 3rd control signal; Wherein, This first adjustment voltage is sent to the centre cap of this primary side of this transformer, and this second adjustment voltage is sent to this analog circuit, and the 3rd adjustment voltage is sent to this digital circuit.
The present invention is through detecting and control unit detects the state (size of the internal latency of chip) of the information that had in the signal of receiving (that is network transfer speeds and DC level drift, receive the signal noise ratio of signal) and chip, and produces first control signal, second control signal and the 3rd control signal accordingly.Afterwards; The power supply adjustment unit is according to first control signal, second control signal and the 3rd control signal; And produce the first adjustment voltage, the second adjustment voltage and the 3rd adjustment voltage, and the first adjustment voltage, the second adjustment voltage and the 3rd adjustment voltage are sent to centre cap, analog circuit and the digital circuit of the primary side of transformer respectively.Thus, the present invention can pass through the dynamically voltage swing of centre cap, analog circuit and the digital circuit of the primary side of adjustment transformer, and then reaches the power consumption of saving network transmission device.
For letting the above-mentioned feature and advantage of the present invention can be more obviously understandable, hereinafter is special lifts embodiment, and cooperates appended graphicly, elaborates as follows.
Description of drawings
Fig. 1 illustrates the circuit block diagram into the network transmission device of one embodiment of the invention.
Fig. 2 illustrates the electricity saving method flow chart into the network transmission device of one embodiment of the invention.
Fig. 3 illustrates the electricity saving method flow chart into the network transmission device of another embodiment of the present invention.
Fig. 4 illustrates the electricity saving method flow chart into the network transmission device of further embodiment of this invention.
[main element label declaration]
100: network transmission device
110: chip
111: detect and control unit
112: analog circuit
113: digital circuit
120: transformer
130: the power supply adjustment unit
R1, R2: resistance
RS: receive signal
CS1: first control signal
CS2: second control signal
CS3: the 3rd control signal
RV1: the first adjustment voltage
RV2: the second adjustment voltage
RV3: the 3rd adjustment voltage
V1: voltage
S201～S204: each step of the electricity saving method of the network transmission device of one embodiment of the invention
S301～S304: each step of the electricity saving method of the network transmission device of another embodiment of the present invention
S401～S404: each step of the electricity saving method of the network transmission device of further embodiment of this invention
Embodiment
Fig. 1 illustrates the circuit block diagram into the network transmission device of one embodiment of the invention.The network transmission device 100 that present embodiment provided can be applied on the GBIC network (Gigabit Ethernet), but does not limit its scope.Please with reference to Fig. 1, network transmission device 100 comprises chip 110, transformer 120 and power supply adjustment unit 130.
In general, network transfer speeds can be divided into 10Mbps, 100Mbps and 1000Mbps in the existing network transmission device 100.Whenever network transfer speeds not simultaneously, the operating voltage of network transmission device 100 also is not quite similar.For example; When network transfer speeds during at 10Mbps, the transmission voltage of network transmission device 100 for example is about 2.5 volts (V), when network transfer speeds during at 100Mbps; The transmission voltage of network transmission device 100 for example is about ± 1 volt (V); When network transfer speeds during at 1000Mbps, the transmission voltage of network transmission device 100 for example is about ± 1 volt (V), and receive voltage and for example be about ± 1 volt (V) and maximum can reach and be about ± 2 volts (V).
In addition, because network transmission device is after receive signal RS, maybe be because the direct current loss of transformer 120, thereby cause and receive the phenomenon that signal RS produces the DC level drift, and then make the direct voltage that receives among the signal RS produce the phenomenon of decay.In the network transmission device 100, performance (Performance) quality that receives the transmission amplitude of signal RS also can be used as the foundation of the adjustment first adjustment voltage RV1.And length of transmission line can be judged through the size that receives signal RS amplitude, that is length of transmission line possibly can reduce amplitude of transmission signal and non-any sacrifice in performance more in short-term.
Therefore; When detecting and control unit 111 receives when receiving signal RS; Just can detect the information that signal RS has the length of network transfer speeds, DC level drift, transmission amplitude and transmission line that receives; To produce the first control signal CS1, as the power supply adjustment unit 130 adjustment voltage V1 that it received, to produce the foundation of the first adjustment voltage RV1.
For instance, when detecting and control unit 111 when detecting network transfer speeds and being 10Mbps, and calculate DC level drift value and detected transmission amplitude and the length of transmission line under this state, and then produce the first control signal CS1_1.When detecting and control unit 111 when detecting network transfer speeds and being 100Mbps, and calculate DC level drift value and detected transmission amplitude and the length of transmission line under this state, and then produce the first control signal CS1_2.When detecting and control unit 111 when detecting network transfer speeds and being 1000Mbps, and calculate DC level drift value and detected transmission amplitude and the length of transmission line under this state, and then produce the first control signal CS1_3.In the present embodiment, when network transfer speeds is 10Mbps, receive the phenomenon that does not have the DC level drift among the signal RS, so DC level drift value is zero.
In addition, detect and control unit 111 is to detect the signal noise ratio that receives signal RS (Signal-to-Noise Rate, information SNR), and produce the second control signal CS2.For instance; When detecting and control unit 111 detects the signal noise ratio that receives signal RS when higher; Then produce the second control signal CS2_1, so that the voltage V1 that it received is turned down, to produce the foundation of the second adjustment voltage RV2_1 as power supply adjustment unit 130.And, then produce the second control signal CS2_2 when detecting and control unit 111 detects the signal noise that receives signal RS when relatively lower, so that as power supply adjustment unit 130 the voltage V1 that it received is heightened, to produce the foundation of the second adjustment voltage RV2_2.In the present embodiment, the second adjustment voltage RV2_1 and RV2_2 can be simulation (Analog) voltage.
In addition, detection and control unit 111 are the states according to chip 110, that is the size of the internal latency of chip 110, and produce the 3rd control signal CS3.For instance; For instance, when detecting and control unit 111 detects the internal latency of chip 110 when big, then produce the 3rd control signal CS3_1; And power supply adjustment unit 130 is heightened the voltage V1 that it received, as the foundation that produces the second adjustment voltage RV3_1.And when detect and internal latency that control unit 111 detects chip 110 hour, then produce the 3rd control signal CS3_2, and power supply adjustment unit 130 is turned down the voltage V1 that it received, as to produce the foundation of the second adjustment voltage RV3_2.In the present embodiment, the 3rd adjustment voltage RV3_1 and RV3_2 can be numeral (Digital) voltage.
In the present embodiment; The mode of the internal latency of detection chip 1105 is in detection and control unit 111, to dispose counter (Counter) A and counter B; Wherein counter A is for example for having the counter of fixed frequency (Fixed Clock); And the frequency of counter B is for example provided by circular type shaker (Ring Oscillator), and the frequency size can change.Therefore, after chip 110 came into operation, counting meter A and B can count simultaneously, and added up the count value that start-stop counter A and B have counted in each cycle.When the count value of counter A count value, represent that then the internal latency of chip 110 is bigger greater than counter B.If the count value of counter A, representes then that the internal latency of chip 110 is less less than the count value of counter B.
Please continue with reference to Fig. 1, transformer 120 has primary side and secondary side, and the primary side of transformer 120 is coupled to detection and control unit 111.Power supply adjustment unit 130 is coupled to and detects and control unit 111 and transformer 120; In order to receive voltage (for example is operating voltage; And be 3.3V) V1; And according to the first control signal CS1, the second control signal CS2 and the 3rd control signal CS3; And produce the first adjustment voltage RV1, the second adjustment voltage RV2 and the 3rd adjustment voltage RV3, and the first adjustment voltage RV1, the second adjustment voltage RV2 and the 3rd adjustment voltage RV3 are sent to centre cap (Center Tap), the analog circuit 112 and digital circuit 113 of the primary side of transformer 120 respectively.
For instance, power supply adjustment unit 130 foundations transmission speed are at that time produced the first control signal CS1 by 10Mbps, 100Mbps or 1000Mbps, produce the centre cap that the first adjustment voltage RV1 is connected to the primary side of transformer 120 again.So, let the centre tapped voltage of primary side of voltage device 120 keep minimum and can keep the normal operation of network transmission device.By this, can reduce the power consumption of network transmission device effectively.
Below; To lift an example explains how at heterogeneous networks transmission speed (10Mbps, 100Mbps, 1000Mbps); And, select the centre tapped minimum voltage Vct of the primary side of transformer 120 according to network transfer speeds, transmission voltage, length of transmission line and DC level drift.
When network transfer speeds was 10Mbps, the account form of minimum voltage Vct was " the minimum operating voltage of Vct-transmission voltage/2 >=chip internal ".Suppose that transmission voltage is 2.5V, and the minimum operating voltage in the inside of transformer 120 is 0.6V.Therefore, Vct-2.5/2 >=0.6, then Vct >=1.85V.
When network transfer speeds was 100Mbps, the account form of minimum voltage Vct was " a Vct-transmission voltage/2-DC level drift/minimum operating voltage of 2 >=chip internal ".Suppose that transmission voltage is 1V, and the minimum operating voltage in the inside of transformer 120 is 0.6V.Therefore, Vct-1/2-DC level drift/2 >=0.6, then Vct >=1.1+ DC level drift/2.In this hypothesis DC level drift value＜0.8, therefore, Vct=1.1～1.5V.
When network transfer speeds was 1000Mbps, the account form of minimum voltage Vct was " Vct-transmission voltage/2-receives voltage/2-DC level drift/minimum operating voltage of 2 >=chip internal ".The minimum operating voltage in inside of supposing transformer 120 is 0.6V, and transmission line is when being short-term, and transmission voltage can be reduced to 0.8V, reception voltage is 1V, and transmission line is during for long line, and then transmission voltage is 1V, and reception voltage is 0.8V.In this hypothesis DC level drift value＜0.6, and bring the aforementioned calculation mode into, can obtain Vct=1.5～1.8V.
In addition; After power supply adjustment unit 130 receives the second control signal CS2_1 (signal noise ratio that receives signal RS is higher); Can produce the second adjustment voltage RV2_1 (voltage that also is about to analog circuit 112 is turned down), and be sent to the analog circuit 112 in the chip 110.After power supply adjustment unit 130 receives the second control signal CS2_2 (signal noise that receives signal RS is lower), can produce the second adjustment voltage RV2_2 (voltage that also is about to analog circuit 112 is heightened), and be sent to the analog circuit 112 in the chip 110.By this, can reduce the power consumption of network transmission device effectively.
In addition, after power supply adjustment unit 130 receives the 3rd control signal CS3_1 (internal latency of chip 110 is less), can produce the 3rd adjustment voltage RV3_1 (voltage that also is about to digital circuit 113 is turned down), and be sent to the digital circuit 113 in the chip 110.After power supply adjustment unit 130 receives the 3rd control signal CS3_2 (internal latency of chip 110 is bigger), can produce the 3rd adjustment voltage RV3_2 (voltage that also is about to digital circuit 113 is heightened), and be sent to the digital circuit 113 in the chip 110.
Please continue with reference to Fig. 1, network transmission device 100 still comprises resistance R 1 and R2.First end of resistance R 1 is coupled to first end of the primary side of transformer 120.First end of resistance R 2 is coupled to second end of resistance R 1, and second end of resistance R 2 is coupled to second end of the primary side of transformer 120.In the present embodiment, resistance R 1 for example is 50 ohm (Ω) with the resistance value of R2, but does not limit its scope.
What deserves to be mentioned is; The foregoing description is to produce the first control signal CS1, the second control signal CS2 and the 3rd control signal simultaneously with detection and control unit 111; Produce the first adjustment voltage RV1, the second adjustment voltage RV2 or the 3rd adjustment voltage RV3 respectively, let network transmission device 100 reach less electricity consumption.But the invention is not restricted to produce simultaneously the first control signal CS1, the second control signal CS2 and the 3rd control signal CS3; Detection also capable of using and control unit 111 are according to the network transfer speeds, DC level drift, transmission amplitude and the length of transmission line that receive among the signal RS; Produce control signal and adjust the size of the centre tapped adjustment voltage of the primary side that is sent to transformer 120, to save the power consumption of network transmission device.Again or, detect and control unit 111 can produce the size that control signal is adjusted the adjustment voltage of the analog circuit 112 that is sent to chip 110 according to the signal noise ratio that receives signal RS, to save the power consumption of network transmission device.Also or, detect and the size of the internal latency that control unit 110 can detection chip 110, produce the size that control signal is adjusted the adjustment voltage of the digital circuit 113 that is sent in the chip 110, to save the power consumption of network transmission device.
Through the explanation of the foregoing description, can summarize a kind of electricity saving method of network transmission device.Fig. 2 illustrates the electricity saving method flow chart into the network transmission device of one embodiment of the invention.The network transmission device of present embodiment has detection and control unit chip and transformer, and chip has analog circuit and digital circuit.Please, at first, in step S201, receive signal with reference to Fig. 2.For example via detecting and this reception signal of control unit reception.In step S202,, and produce first control signal according to the state that detects reception signal or chip.In the present embodiment, detection and control unit detect and receive the information that signal has network transfer speeds, DC level drift, transmission amplitude and length of transmission line, can produce first control signal in view of the above.Again or, detect and control unit receives the information that signal has signal noise ratio, can produce first control signal in view of the above.Also or, detect and control unit detects the size of the internal latency of chip, can produce first control signal in view of the above.
In step S203,, and produce the first adjustment voltage accordingly according to first control signal.In step S204, with first the adjustment voltage be sent to the primary side of transformer centre cap, analog circuit and digital circuit one of them.In the present embodiment; If the first adjustment voltage is to have the information of network transfer speeds, DC level drift, transmission amplitude and length of transmission line and produce according to receiving signal, then this first adjustment voltage is sent to the centre cap of the primary side of transformer.And if the first adjustment voltage is to have signal noise ratio and produce according to receiving signal, then this first adjustment voltage is sent to analog circuit.Again or, the first adjustment voltage is to produce according to the size of the internal latency of chip, then this first adjustment voltage is sent to the digital circuit of chip.Thus, can be sent to the voltage swing of centre cap, analog circuit or the digital circuit of the primary side of transformer, to reduce the power consumption of network transmission device through dynamic adjustment.
Fig. 3 illustrates the electricity saving method flow chart into the network transmission device of another embodiment of the present invention.Please with reference to Fig. 3.At first, in step S301, receive signal.For example via detecting and this reception signal of control unit reception.In step S302, detect the state that receives signal or chip, and produce first control signal and second control signal.In the present embodiment; First control signal is through detecting and control unit detects and receives the information that signal has network transfer speeds, DC level drift, transmission amplitude and length of transmission line and produce, and second control signal is through detecting and control unit detects and receives the information that signal has signal noise ratio and produce.Or; First control signal is to produce through the size that detects and control unit detects the internal latency of this chip, and second control signal is through detecting and control unit detects and receives the information that signal has network transfer speeds, DC level drift, transmission amplitude and length of transmission line and produce.Again or, first control signal is through detecting and the size of the internal latency of control unit detection chip produces, second control signal is through detecting and control unit detects the information that this reception signal has signal noise ratio and produces.
In step S303,, and produce the first adjustment voltage and the second adjustment voltage accordingly according to first control signal and second control signal.In step S304, with the first adjustment voltage and second adjust centre cap, analog circuit and digital circuit that voltage is sent to the primary side of transformer respectively wherein two.Be sent to centre cap, analog circuit and digital circuit two the voltage swing wherein of the primary side of transformer through adjustment simultaneously, to reduce the power consumption of network transmission device effectively.
Fig. 4 illustrates the electricity saving method flow chart into the network transmission device of another embodiment of the present invention.Please with reference to Fig. 4.At first, in step S401, receive signal.For example via detecting and this reception signal of control unit reception.In step S402, detect the state that receives signal or chip, and produce first control signal, second control signal and the 3rd control signal.In the present embodiment; First control signal is to produce according to the information that has network transfer speeds, DC level drift, transmission amplitude and length of transmission line through detection and control unit detection reception signal; Second control signal is according to through detecting and control unit detects and receives the information that signal has signal noise ratio and produce, and the 3rd control signal is according to through detecting and the size of the internal latency that the control unit detection chip has produces.
In step S403,, and produce the first adjustment voltage, the second adjustment voltage and the 3rd adjustment voltage accordingly according to first control signal, second control signal and the 3rd control signal.In step S404, the first adjustment voltage, the second adjustment voltage and the 3rd adjustment voltage are sent to centre cap, analog circuit and the digital circuit of the primary side of transformer respectively.Through adjusting the voltage swing of centre cap, analog circuit and the digital circuit of the primary side that is sent to transformer simultaneously, to reduce the power consumption of network transmission device effectively.
In sum; The present invention is through detecting and control unit detects the state (size of the internal latency of chip) of the information that had in the signal of receiving (network transfer speeds and DC level drift, receive the signal noise ratio of signal) and chip, and produces first control signal, second control signal and the 3rd control signal accordingly.Afterwards; The power supply adjustment unit is according to first control signal, second control signal and the 3rd control signal; And produce the first adjustment voltage, the second adjustment voltage and the 3rd adjustment voltage, and the first adjustment voltage, the second adjustment voltage and the 3rd control signal are sent to centre cap, analog circuit and the digital circuit of the primary side of transformer respectively.Thus, the present invention can pass through the dynamically voltage swing of centre cap, analog circuit and the digital circuit of the primary side of adjustment transformer, so that save the power consumption of network transmission device.
Though the present invention discloses as above with embodiment; Right its is not that any those skilled in the art are not breaking away from the spirit and scope of the present invention in order to qualification the present invention; When can doing a little change and retouching, so protection scope of the present invention is as the criterion when looking appended the claim scope person of defining.
Claims (6)
1. network transmission device comprises:
Chip comprises:
Detect and control unit, carry out following actions:
Receive and detect the reception signal of information, produce first control signal with network transfer speeds, DC level drift, transmission amplitude and length of transmission line,
Receive and detect the reception signal of information, produce second control signal with signal noise ratio, and
Detect the size of the internal latency of this chip, produce the 3rd control signal;
Analog circuit; And
Digital circuit;
Transformer has primary side and secondary side, and this primary side is coupled to this chip; And
The power supply adjustment unit; Be coupled to the centre cap of this primary side of this detection and control unit and this transformer; In order to receiving voltage, and produce first, second and the 3rd adjustment voltage accordingly according to first, second and the 3rd control signal, this first adjustment voltage is sent to the centre cap of this primary side of this transformer; This second adjustment voltage is sent to this analog circuit, and the 3rd adjustment voltage is sent to this digital circuit.
2. network transmission device according to claim 1 also comprises:
First resistance, its first end is coupled to first end of this primary side of this transformer; And
Second resistance, its first end is coupled to second end of this first resistance, and its second end is coupled to second end of this primary side of this transformer.
3. network transmission device according to claim 1, wherein this voltage is operating voltage.
4. network transmission device comprises:
Chip comprises:
Detect and control unit, carry out wherein two kinds of following three kinds of actions:
Receive and detect the reception signal of information, produce first control signal with network transfer speeds, DC level drift, transmission amplitude and length of transmission line,
Receive and detect the reception signal of information, produce second control signal with signal noise ratio, and
Detect the size of the internal latency of this chip, produce the 3rd control signal;
Analog circuit; And
Digital circuit;
Transformer has primary side and secondary side, and this primary side is coupled to this chip; And
The power supply adjustment unit; Be coupled to the centre cap of this primary side of this detection and control unit and this transformer; In order to receiving voltage, and produce first, second or the 3rd adjustment voltage accordingly according to first, second or the 3rd control signal, this first adjustment voltage is sent to the centre cap of this primary side of this transformer; This second adjustment voltage is sent to this analog circuit, and the 3rd adjustment voltage is sent to this digital circuit.
5. the electricity saving method of a network transmission device, and this network transmission device has chip and transformer, and this chip has analog circuit and digital circuit, and this electricity saving method comprises the following steps:
Receive signal;
Carry out following actions:
Receive and detect reception information, produce first control signal with network transfer speeds, DC level drift, transmission amplitude and length of transmission line,
Receive and detect the reception information of information, produce second control signal with signal noise ratio, and
Detect the size of the internal latency of this chip, produce the 3rd control signal; And
Produce first, second and the 3rd adjustment voltage accordingly according to first, second and the 3rd control signal,
Wherein, this first adjustment voltage is sent to the centre cap of the primary side of this transformer, and this second adjustment voltage is sent to this analog circuit, and the 3rd adjustment voltage is sent to this digital circuit.
6. the electricity saving method of a network transmission device, and this network transmission device has chip and transformer, and this chip has analog circuit and digital circuit, and this electricity saving method comprises the following steps:
Receive signal;
Carry out wherein two kinds of following three kinds of actions:
Receive and detect reception information, produce first control signal with network transfer speeds, DC level drift, transmission amplitude and length of transmission line,
Receive and detect the reception information of information, produce second control signal with signal noise ratio, and
Detect the size of the internal latency of this chip, produce the 3rd control signal; And
Produce first, second or the 3rd adjustment voltage accordingly according to first, second or the 3rd control signal,
Wherein, this first adjustment voltage is sent to the centre cap of the primary side of this transformer, and this second adjustment voltage is sent to this analog circuit, and the 3rd adjustment voltage is sent to this digital circuit.
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| CN1490990A (en) * | 2002-10-18 | 2004-04-21 | 阳庆电子股份有限公司 | Method for embedded electricity-saving system |
| CN101291230A (en) * | 2007-04-17 | 2008-10-22 | 瑞昱半导体股份有限公司 | Receiving apparatus with electricity saving function, and method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1490990A (en) * | 2002-10-18 | 2004-04-21 | 阳庆电子股份有限公司 | Method for embedded electricity-saving system |
| CN101291230A (en) * | 2007-04-17 | 2008-10-22 | 瑞昱半导体股份有限公司 | Receiving apparatus with electricity saving function, and method thereof |
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