CN104104626B - Drive device and related Transmission system - Google Patents
Drive device and related Transmission system Download PDFInfo
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- CN104104626B CN104104626B CN201310127748.3A CN201310127748A CN104104626B CN 104104626 B CN104104626 B CN 104104626B CN 201310127748 A CN201310127748 A CN 201310127748A CN 104104626 B CN104104626 B CN 104104626B
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Abstract
A kind of drive device for Transmission system, comprising one first modular converter, comprising a current source cell, for according to a current indicating signal in input signal, producing one first electric current and one second electric current；And a control unit, for the level signal according to input signal, produce a control signal；And one second modular converter, comprising a positive electricity stream generation unit, for according to control signal and first electric current, positive driving current being produced in positive transmission end in the very first time is interval；And a negative electricity stream generation unit, for according to control signal and the second electric current, negative driving current being produced in the second time interval；Do not overlapped mutually between very first time interval and the second time interval wherein.
Description
Technical field
The present invention is relevant to a kind of drive device for Transmission system, and espespecially one kind can reduce average in Transmission system
The drive device of driving current.
Background technology
With the development of science and technology the application of network is more and more extensive, have become indispensable in people's daily life
A part.And because the requirement of various network applications (such as multimedia application on line) to frequency range is more and more stricter, therefore network
The speed of device is also gradually promoted to more than 1000Mbs (that is, 1Gbs) by 10/100Mbs.At different speeds, network
When transmission line (transmission line) is driven, the signal on transmission line has the different amplitudes of oscillation to device.In general,
According to the difference of type of drive, the driving method of the transmitting device in network equipment can be divided into current-mode (current
) and voltage mode (voltage mode) mode.
When the transmitting device in network equipment is realized with current-mode, transmitting device needs to use a large amount of driving currents
A transformer (transformer) is driven, the purpose of transmission line is driven to reach.However, no matter whether transmitting device needs to change
Become the signal on transmission line, the electric current total amount normality of driving transformer can be maintained one by the transmitting device in conventional art
Considerable definite value.In other words, when the input of network equipment does not have a signal feed-in and transmitting device is not needed on modulation transmission line
Signal when, transmitting device can still continue to produce substantial amounts of electric current, so as to waste significant power consumption.It follows that passing
System technology has necessity of improvement in fact.
The content of the invention
In order to solve the above problems, the present invention proposes a kind of driving dress that can reduce average driving current in Transmission system
Put.
The invention discloses a kind of drive device, apply in a Transmission system, the drive device includes one first conversion
Module, includes a current source cell, for according to a current indicating signal in an input signal, producing one first electric current and one
Second electric current；And a control unit, for the level signal according to the input signal, produce a control signal；And one
Second modular converter, includes a positive electricity stream generation unit, is coupled to the current source cell, the control unit and the transmission system
A positive transmission end in system, for according to the control signal and first electric current, a positive driving being produced in a very first time is interval
Electric current gives the positive transmission end；And a negative electricity stream generation unit, it is coupled to the current source cell, the control unit and the transmission
A negative transmission end in system, for according to the control signal and second electric current, a negative drive being produced in one second time interval
Streaming current gives the negative transmission end；Do not overlapped mutually between very first time interval and second time interval wherein.
The present invention is separately disclosed in a kind of Transmission system, includes a transformer, is coupled to a positive transmission of the Transmission system
Between end and a negative transmission end；One resistance unit, is coupled between the positive transmission end and the negative transmission end；And one drive dress
Put, include one first modular converter, include a current source cell, for indicating letter according to an electric current in an input signal
Number, produce one first electric current and one second electric current；And a control unit, for being believed according to a level of the input signal
Number, produce a control signal；And one second modular converter, include a positive electricity stream generation unit, it is coupled to the current source list
A positive transmission end in unit, the control unit and the Transmission system, for according to the control signal and first electric current, one the
A positive driving current is produced to give the positive transmission end in one time interval；And a negative electricity stream generation unit, it is coupled to the current source
A negative transmission end in unit, the control unit and the Transmission system, for according to the control signal and second electric current, Yu Yi
A negative driving current is produced to give the negative transmission end in second time interval；The wherein very first time is interval with second time interval
Between do not overlap mutually.
The present invention separately discloses a kind of current driving method being used in a Transmission system, includes interval in a very first time
One positive driving current of interior generation positive transmission end in the Transmission system；And a negative driving is produced in one second time interval
Electric current negative transmission end in the Transmission system；The wherein very first time interval not phase mutual respect between second time interval
Repeatedly.
Brief description of the drawings
Fig. 1 is the schematic diagram of the Transmission system of the embodiment of the present invention one.
Fig. 2 is the schematic diagram of the implementation of Transmission system one shown in Fig. 1.
The schematic diagram of coherent signal when Fig. 3 is the Transmission system running shown in Fig. 2.
Fig. 4 is the schematic diagram of another implementation of Transmission system shown in Fig. 1.
The schematic diagram of coherent signal when Fig. 5 is the Transmission system running shown in Fig. 4.
Fig. 6 is the schematic diagram of the current driving method of the embodiment of the present invention one.
10 Transmission systems
100 transformers
102 resistance units
104 drive devices
106 first modular converters
108 second modular converters
110 current source cells
112 control units
114 positive electricity stream generation units
116 negative electricity stream generation units
60 current driving methods
600~606 steps
B[n:0] bit
CIS current indicating signals
CON control signals
CTXN, CTXP signal
DAC analog-digital converters
DIN input signals
GND ground terminals
ITX1~ITX4 electric currents
ITXN bears driving current
The positive driving currents of ITXP
LD1, LD2 line drive
MN1, MN2 N-type metal-oxide half field effect transistor
RL impedances
SW1~SW6 is switched
TXN bears transmission end
The positive transmission ends of TXP
VIS level signals
Specific embodiment
Fig. 1 is refer to, Fig. 1 is the schematic diagram of the Transmission system 10 of the embodiment of the present invention one.Transmission system 10 is used for according to one
Input signal DIN, drives a transmission line (this figure is the equiva lent impedance that transmission line is represented with an impedance RL).As shown in figure 1, passing
Defeated system 10 includes the resistance unit 102 of a transformer (Transformer) 100, one and a drive device 104.Transformer
100 two ends are respectively coupled to positive transmission end TXP and negative transmission end TXN, for according to positive driving current ITXP and negative driving electricity
Stream ITXN, drives transmission line.Resistance unit 102 is coupled to positive transmission end TXP and negative transmission end TXN, for matched transmission line
Impedance RL.Drive device 104 includes one first modular converter 106 and one second modular converter 108, for according to an input
Signal DIN, the positive driving current ITXP and negative driving current ITXN of dynamic adjustment.It is worth noting that, according to input signal DIN,
Drive device 104 will not simultaneously produce positive driving current ITXP and negative driving current ITXN.Accordingly, when input signal DIN is indicated
When Transmission system 10 does not need the signal on modulation transmission line, positive driving current ITXP and bear that the second modular converter 108 is exported
Driving current ITXN can be simultaneously zero, so as to the average current and power consumption of Transmission system 10 is greatly reduced.
Specifically, the first modular converter 106 includes a current source cell 110 and a control unit 112.Current source
Unit 110 is used for, according to a current indicating signal CIS in input signal DIN, producing electric current ITX1, ITX2.Control unit 112 is used
, according to a level signal VIS in input signal DIN, to produce a control signal CON.Second modular converter 108 includes positive electricity
Stream generation unit 114 and negative electricity stream generation unit 116.Positive electricity stream generation unit 114 is coupled to current source cell 110, control list
Unit 112 and positive transmission end TXP, for according to control signal CON and electric current ITX1, producing positive driving current ITXP.Similarly, bear
Current generating unit 116 is coupled to current source cell 110, control unit 112 and negative transmission end TXN, for according to control signal
CON and electric current ITX2, produces negative driving current ITXN.
When level indicating signal VIS indicates the voltage level of lifting transmission line in input signal DIN, control unit 112
By adjusting control signal CON, negative electricity stream generation unit 116 is decommissioned, and make positive electricity stream generation unit 114 according to electric current
ITX1 produces positive driving current ITXP.Relatively, when level indicating signal VIS instructions reduction transmission line in input signal DIN
During voltage level, control unit 112 makes positive electricity stream generation unit 114 decommission, and make to bear by adjusting control signal CON
Current generating unit 116 produces negative driving current ITXN according to electric current ITX2.Additionally, when level indicating letter in input signal DIN
When number VIS indicates not changing the voltage level of transmission line, control unit 112 produces positive current by adjusting control signal CON
Unit 114 and negative electricity stream generation unit 116 decommission simultaneously.Accordingly, according to control signal CON, drive device 104 can be dynamic
Adjust positive driving current ITXP and negative driving current ITXN.Significantly, since when level indicating letter in input signal DIN
It is positive to drive electricity when number VIS indicates not changing the voltage level of transmission line (such as when non-avaible needs transmission in input signal DIN)
Stream ITXP and negative driving current ITXN simultaneously be zero, therefore drive device 104 average current and power consumption all can effectively under
Drop.
Fig. 2 is refer to, Fig. 2 is the schematic diagram of the implementation method of Transmission system 10 1 shown in Fig. 1.As shown in Fig. 2 current source
Unit 110 is realized with a digital analog converter DAC, and positive electricity stream generation unit 114 includes switch SW1, SW2 and line
Driver (Line Driver) LD1, and negative electricity stream generation unit 116 is then by switching SW3, SW4 and line drive LD2 institutes group
Into.In this embodiment, input signal DIN is n-bit signal, includes bit B [n:0], level signal VIS is input signal
The highest significant bit (MSB) (i.e. bit B [n]) of DIN, and current indicating signal CIS then in input signal DIN highest it is effective
Bit (i.e. bit B [n-1 beyond bit:0]).Additionally, in this embodiment, bit B [n] can be directly as control signal
CON。
Detailed operation on the Transmission system 10 shown in Fig. 2, is illustrated below.Digital analog converter DAC can root
According to B [n-1:0] (i.e. current indicating signal CIS), produces electric current ITX1, ITX2, and export respectively to positive electricity stream generation unit 114
And negative electricity stream generation unit 116.When bit B [n] (i.e. level signal VIS, control signal CON) is high logic level, switch
SW1, SW3 can disconnect and switch SW2, SW4 can be turned on.Original electric current ITX2 for flowing to negative electricity stream generation unit 116 can be directed to
Ground terminal GND, and the line drive LD1 in positive electricity stream generation unit 114 then can produce positive driving current according to electric current ITX1
ITXP.For example, electric current ITX1 can be amplified a specific factor by line drive LD1, as positive driving current ITXP, to drive
Transformer 100.Similarly, when bit B [n] is low logic level, switch SW1, SW3 can be turned on and be switched SW2, SW4 and can break
Open.Original electric current ITX1 for flowing to positive electricity stream generation unit 114 can be directed to ground terminal GND, and in negative electricity stream generation unit 116
Line drive LD2 then can produce negative driving current ITXN according to electric current ITX2.Accordingly, positive electricity stream generation unit 114 and negative current
Generation unit 116 will not be operated simultaneously, and then the average current and power consumption of drive device 104 is effectively declined.
Additionally, in the conventional technology, if input signal DIN is n-bit signal, for producing the digital-to-analogue conversion of electric current
Device is also necessary for n-bit digital analog converter.In comparison, because the highest of input signal DIN in above-described embodiment is effective
Bit is taken as the level signal VIS for indicating transmission-line voltage level, and digital analog converter can use (n-1) digital bit
Analog converter is realized, so as to reduce the complexity and cost expenses for realizing digital analog converter.In other words, by that will be input into
Signal DIN points is level signal VIS and the instruction for indicating to produce positive driving current ITXP or produce negative driving current ITXN
The current indicating signal CIS of size of current, can not only reduce the average current and power consumption of drive device 104, can also drop
The low complexity and cost expenses for realizing drive device 104.
Fig. 3 is refer to, the schematic diagram of coherent signal when Fig. 3 is the running of Transmission system 10 shown in Fig. 2.Arrived in time point T1
Time point T2, bit B [n] (i.e. level signal VIS, control signal CON) are high logic level to indicate switch SW1, SW3 to break
Open, switch SW2, SW4 conducting.Negative electricity stream generation unit 116 is inoperative, and it is zero to bear driving current ITXN.Positive electricity stream generation unit
114 according to electric current ITX1, produces positive driving current ITXP.Now, current source cell 110 is according to bit B [n-1:0] gradually increase
The positive driving current ITXP that electric current ITX1, line drive LD1 are produced can be gradually increasing with electric current ITX1.Similarly, in the time
Point T2 to time point T3, bit B [n] are still high logic level, and negative electricity stream generation unit 116 is inoperative, bears driving current ITXN
It is zero.Current source cell 110 is according to bit B [n-1:0] electric current ITX1, therefore the positive drive that line drive LD1 is produced are gradually decreased
Streaming current ITXP can be gradually reduced with electric current ITX1.
Relatively, in time point T3 to time point T4, bit B [n] (i.e. level signal VIS, control signal CON) is patrolled for low
Level is collected to indicate switch SW1, SW3 conducting, switch SW2, SW4 to disconnect.Positive electricity stream generation unit 114 is inoperative, positive to drive electricity
Stream ITXP is zero.Negative electricity stream generation unit 116 produces negative driving current ITXN according to electric current ITX2.Now, current source cell
110 according to bit B [n-1:0] electric current ITX2 is gradually increased, the negative driving current ITXN that line drive LD2 is produced can be with electric current
ITX2 is gradually increasing.Similarly, in time point T4 to time point T5, bit B [n] is still low logic level, and positive current produces single
Unit 114 is inoperative, and positive driving current ITXP is zero.Current source cell 110 is according to bit B [n-1:0] electric current ITX2 is gradually decreased,
Therefore the negative driving current ITXN that line drive LD2 is produced can be gradually reduced with electric current ITX2.By that analogy.Should be noted
That, in time point T3, positive electricity stream generation unit 114 is all inoperative with negative electricity stream generation unit 116, positive driving current ITXP with it is negative
Driving current ITXN is all zero.In other words, drive device 104 when signal on modulation transmission line is not required to (such as time point T3) drive
Streaming current is zero, and the average current and power consumption of drive device 104 can be greatly reduced.
It is worth noting that, the spirit of above-described embodiment is according to input signal, drive device exists in making Transmission system
Positive driving current ITXP and negative driving current ITXN is produced in different time is interval, so as to be greatly reduced according to the average of Transmission system
Electric current and power consumption.According to different application, those skilled in the art should according to this implement suitable change and modification.Lift
For example, Fig. 4 is refer to, Fig. 4 is the schematic diagram of another implementation of Transmission system 10 shown in Fig. 1.As shown in figure 4, electric current
Source unit 110 is realized that control unit 112 produces letter according to level signal VIS in input signal DIN with current source CS1, CS2
Number CTXP, CTXN are used as control signal CON.Positive electricity stream generation unit 114 and negative electricity stream generation unit 116 are respectively by switch element
SWU1, SWU2 are constituted.Switch element SWU1 and switch element SWU2 includes N-type metal-oxide half field effect transistor (NMOS) respectively
MN1, MN2 and switch SW5, SW6.Switch element SWU1 should be this area tool and generally knows with the operation principles of switch element SWU2
Known to the knowledgeable, for the sake of clarity, will not be described here.According to different application, switch element SWU1 and switch element SWU2 can be according to this
Modification, and it is not limited to the implementation shown in Fig. 4.
On the Transmission system 10 shown in Fig. 4, it is illustrated below.Please collective reference Fig. 5, Fig. 5 is the transmission shown in Fig. 4
The schematic diagram of coherent signal when system 10 is operated.In time point T1 to time point T2, signal CTXN is low logic level, so as to open
Close module SWU2 and disconnect negative connection between transmission end TXN and current source CS2, therefore negative driving current ITXN is zero.On the other hand,
Signal CTXP is high logic level, so that switch module SWU1 turns on the connection between positive transmission end TXP and current source CS1, so that
The electric current ITX3 for exporting current source CS1 turns into positive driving current ITXP.Current source CS1 refers to according to electric current in input signal DIN
Show signal CIS, positive driving current ITXP is incremented by proper order.Similarly, in time point T2 to time point T3, signal CTXP is logic high
Level and signal CTXN are low logic level, and switch module SWU1 turns on the connection between positive transmission end TXP and current source CS1 and opens
Close module SWU2 and disconnect negative connection between transmission end TXN and current source CS2.The electric current ITX3 of current source CS1 outputs turns into positive drive
Streaming current ITXP, and current source CS1 is according to current indicating signal CIS in input signal DIN, positive driving current of successively decreasing in proper order
ITXP。
In time point T3 to time point T4, signal CTXP is low logic level, so that switch module SWU1 disconnects positive transmission
Connection between the TXP and current source CS1 of end, therefore positive driving current ITXP is zero.On the other hand, signal CTXN is logic high electricity
It is flat, so that the switch module SWU2 negative connections between transmission end TXN and current source CS2 of conducting, so that the electricity of current source CS2 outputs
Stream ITX4 turns into negative driving current ITXN.Current source CS2 is incremented by negative in proper order according to current indicating signal CIS in input signal DIN
Driving current ITXN.Similarly, in time point T4 to time point T5, signal CTXN is that high logic level and signal CTXP are patrolled for low
Level is collected, switch module SWU1 disconnects the connection between positive transmission end TXP and current source CS1 and the negative transmission of switch module SWU2 conductings
Connection between the TXN and current source CS2 of end.The electric current ITX4 of current source CS2 outputs turns into negative driving current ITXN, and current source
According to current indicating signal CIS in input signal DIN, successively decrease CS2 negative driving current ITXN in proper order, by that analogy.Should be noted
It is that, in time point T3, positive driving current ITXP is all zero with negative driving current ITXN.In other words, drive device 104 in be not required to adjust
The driving current of (such as time point T3) is zero when becoming signal on transmission line, and the average current and power consumption of drive device 104 can
It is greatly reduced.
Mode on the positive driving current ITXP and negative driving current ITXN of the dynamic adjustment of drive device 104, can be further
Summarize a current driving method 60.Refer to Fig. 6, it should be noted that, if there is substantially the same result, then electric current drives
Method 60 is not limited with the order of flow chart shown in Fig. 6.Current driving method 60 can be used for a Transmission system, and include with
Lower step：
Step 600：Start.
Step 602：A positive driving current positive transmission end in Transmission system is produced in a very first time is interval.
Step 604：A negative driving current negative transmission end in Transmission system is produced in one second time interval, wherein
The very first time is interval not to overlap mutually and second time interval between.
Step 606：Terminate.
According to current driving method 60, the drive device in Transmission system is dynamically adapted the positive drive for driving transmission line
Streaming current and negative driving current, so that drive device produces positive driving current to drive electricity with negative respectively in different time is interval
Stream.Accordingly, the average current and power consumption of Transmission system can be can be effectively reduced.The detailed operation process of current driving method 60
Refer to above-mentioned, for the sake of clarity, will not be described here.
In sum, drive device, Transmission system and the current driving method that above-described embodiment is proposed are dynamically adapted
For driving the positive driving current and negative driving current of transmission line, so that drive device is when the signal on transmission line is not required to modulation
Positive driving current will not be produced with negative driving current.Accordingly, the average current and power consumption of Transmission system can be can be effectively reduced.
Claims (16)
1. a kind of drive device, applies in a Transmission system, and the drive device includes：
One first modular converter, includes：
One current source cell, for according to a current indicating signal in an input signal, producing one first electric current and one second electricity
Stream；And
One control unit, for the level signal according to the input signal, produces a control signal；And
One second modular converter, includes：
One positive electricity stream generation unit, is coupled to a positive transmission end in the current source cell, the control unit and the Transmission system,
For according to the control signal and first electric current, producing a positive driving current to give the positive transmission in a very first time is interval
End；And
One negative electricity stream generation unit, is coupled to a negative transmission end in the current source cell, the control unit and the Transmission system,
For according to the control signal and second electric current, producing a negative driving current to give the negative transmission in one second time interval
End；
Do not overlapped mutually between very first time interval and second time interval wherein.
2. drive device as claimed in claim 1, it is characterised in that the positive electricity stream generation unit includes：
A gleam of driver, is coupled to the positive transmission end；
One first switch, is coupled between the current source cell and ground terminal, for controlling the current source list according to the control signal
Link between unit and ground terminal；And
One second switch, is coupled between the current source cell and the line drive, for controlling the electricity according to the control signal
Link between stream source unit and the line drive, so that the line drive produces the positive driving current extremely should according to first electric current
Positive transmission end.
3. drive device as claimed in claim 2, it is characterised in that the level signal is that a highest of the input signal is effective
Bit.
4. drive device as claimed in claim 2, it is characterised in that the current indicating signal is a highest in the input signal
An at least remaining bits beyond significant bit.
5. drive device as claimed in claim 1, it is characterised in that the positive electricity stream generation unit includes：
One switch element, is coupled between the current source cell and the positive transmission end, for according to the control signal, exporting the electricity
Stream is used as the positive driving current.
6. drive device as claimed in claim 1, it is characterised in that when the level signal indicates booster tension level, should
Control unit exports appropriate control signal, so that the positive electricity stream generation unit produces the positive driving current to the positive transmission end.
7. drive device as claimed in claim 1, it is characterised in that when the level signal indicates to reduce voltage level, should
Control unit exports appropriate control signal, so that the negative electricity stream generation unit produces the negative driving current to the negative transmission end.
8. drive device as claimed in claim 1, it is characterised in that when the level signal indicates a zero voltage level, should
Control unit exports appropriate control signal, so that the positive electricity stream generation unit and the negative electricity stream generation unit decommission.
9. a kind of Transmission system, includes：
One transformer, is coupled between a positive transmission end of the Transmission system and a negative transmission end；
One resistance unit, is coupled between the positive transmission end and the negative transmission end；And
One drive device, includes：
One first modular converter, includes：
One current source cell, for according to a current indicating signal in an input signal, producing one first electric current and one second electricity
Stream；And
One control unit, for the level signal according to the input signal, produces a control signal；And
One second modular converter, includes：
One positive electricity stream generation unit, is coupled to a positive transmission end in the current source cell, the control unit and the Transmission system,
For according to the control signal and first electric current, producing a positive driving current to give the positive transmission in a very first time is interval
End；And
One negative electricity stream generation unit, is coupled to a negative transmission end in the current source cell, the control unit and the Transmission system,
For according to the control signal and second electric current, the negative transmission being given in a negative driving current is produced in one second time interval
End；
Do not overlapped mutually between very first time interval and second time interval wherein.
10. Transmission system as claimed in claim 9, it is characterised in that the positive electricity stream generation unit includes：
A gleam of driver, is coupled to the positive transmission end；
One first switch, is coupled between the current source cell and ground terminal, for controlling the current source list according to the control signal
Link between unit and ground terminal；And
One second switch, is coupled between the current source cell and the line drive, for controlling the electricity according to the control signal
Link between stream source unit and the line drive, so that the line drive produces the positive driving current extremely should according to first electric current
Positive transmission end.
11. Transmission systems as claimed in claim 10, it is characterised in that the level signal is that a highest of the input signal has
Effect bit.
12. Transmission systems as claimed in claim 10, it is characterised in that the current indicating signal be in the input signal one most
An at least remaining bits beyond significant bit high.
13. Transmission systems as claimed in claim 9, it is characterised in that the positive electricity stream generation unit includes：
One switch element, is coupled between the current source cell and the positive transmission end, for according to the control signal, exporting the electricity
Stream is used as the positive driving current.
14. Transmission systems as claimed in claim 9, it is characterised in that when the level signal indicates booster tension level, should
Control unit exports appropriate control signal, so that the positive electricity stream generation unit produces the positive driving current to the positive transmission end.
15. Transmission systems as claimed in claim 9, it is characterised in that when the level signal indicates to reduce voltage level, should
Control unit exports appropriate control signal, so that the negative electricity stream generation unit produces the negative driving current to the negative transmission end.
16. Transmission systems as claimed in claim 9, it is characterised in that when the level signal indicates a zero voltage level, should
Control unit exports appropriate control signal, so that the positive electricity stream generation unit and the negative electricity stream generation unit decommission.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310127748.3A CN104104626B (en) | 2013-04-12 | 2013-04-12 | Drive device and related Transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310127748.3A CN104104626B (en) | 2013-04-12 | 2013-04-12 | Drive device and related Transmission system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104104626A CN104104626A (en) | 2014-10-15 |
| CN104104626B true CN104104626B (en) | 2017-06-23 |
Family
ID=51672433
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1707969A (en) * | 2004-06-11 | 2005-12-14 | 瑞昱半导体股份有限公司 | Transmission line driver |
| CN1922839A (en) * | 2003-11-24 | 2007-02-28 | 快捷半导体有限公司 | Current transfer logic |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1745535A (en) * | 2003-01-29 | 2006-03-08 | 皇家飞利浦电子股份有限公司 | Data communication using constant total current |
| TWI430598B (en) * | 2011-04-07 | 2014-03-11 | Ralink Technology Corp | Current mode line driver |
-
2013
- 2013-04-12 CN CN201310127748.3A patent/CN104104626B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1922839A (en) * | 2003-11-24 | 2007-02-28 | 快捷半导体有限公司 | Current transfer logic |
| CN1707969A (en) * | 2004-06-11 | 2005-12-14 | 瑞昱半导体股份有限公司 | Transmission line driver |
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| Publication number | Publication date |
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| CN104104626A (en) | 2014-10-15 |
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