CN105307245B - The method of information transmit-receive signal and training balanced device based on receiving unit balanced device - Google Patents
The method of information transmit-receive signal and training balanced device based on receiving unit balanced device Download PDFInfo
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- CN105307245B CN105307245B CN201410231291.5A CN201410231291A CN105307245B CN 105307245 B CN105307245 B CN 105307245B CN 201410231291 A CN201410231291 A CN 201410231291A CN 105307245 B CN105307245 B CN 105307245B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The present invention provides a kind of method of information transmit-receive signal based on receiving unit balanced device and trained balanced device.Wherein, the method of receiving and transmitting signal includes: the balanced device based on the training sequence training electronic device for being transmitted to electronic device from external connecting device, to obtain one first parameter, balanced device is according to the first parameter compensation training sequence, wherein, the difference between the first parameter and the high-frequency energy and low frequency energy of training sequence is related；Compare the first parameter and one group of reference value, to obtain one second parameter, the difference between the second parameter and the high-frequency energy and low frequency energy of an output signal is related；And it is based on the second parameter, it executes one and strengthens step in advance to adjust a transmission unit of electronic device, to generate output signal, output signal is transmitted to external connecting device from transmission unit.
Description
Technical field
The present invention relates to the method and device thereof that a kind of signal is sent, espespecially a kind of information based on receiving unit balanced device
The method of the method and training balanced device of receiving and transmitting signal.
Background technique
The sequence link (Serial Link) of running gear is often wished on power consumption (power consumption)
Prestige can be controlled reasonably.It is larger with transmitting device (transmitter) consumption in power consumption, and the function of transmitting device
Rate consumption length at a distance from transmission line is closely bound up.In the design of sequence link, in order to support the transmission of different line-spacings
Line (such as 1 meter, 3 meters or 5 meters transmission line), transmitting device are using the longest situation of transmission line line-spacing as examining in design
Consider, that is, by the amplitude of oscillation (swing) of transmitting device output signal be designed to can be used for nose away from a fixed value (as maximum
Value) so that transmitting device energy Support Line is away from longest transmission line.But running gear is when in use, is usually all using short-term
Away from transmission line transmitted, lead to running gear when in use, generate many unnecessary power consumption (power
) and electromagnetic interference (Electromagnetic Interference, abbreviation EMI) consumption.
Summary of the invention
The main purpose of the present invention is to provide a kind of methods of receiving and transmitting signal, electronic device can be made according to transmission line
Length and adjust automatically output signal the amplitude of oscillation (or amplitude) and low-and high-frequency energy difference away from, with reduce electronic device power consumption and
The electronic device electromagnetic interference (EMI) caused when transmitting signal.
Another object of the present invention is to provide a kind of methods of trained balanced device, optionally make monitor need not
Digital analog converter is set, occupies the area of physical layer and the manufacturing expense of reduction electronic device to reduce monitor.
In order to achieve the above objectives, the present invention provides a kind of method of receiving and transmitting signal comprising: it is based on passing from external connecting device
Transport to electronic device training sequence training the electronic device balanced device (equalizer), with obtain one first parameter (such as
High-frequency energy offset), balanced device is according to the first parameter compensation training sequence, wherein the high frequency of the first parameter and training sequence
Difference between energy and low frequency energy is related；Compare the first parameter and one group of reference value, to obtain one second parameter, the second parameter
Difference between the high-frequency energy of an output signal and low frequency energy is related；And it is based on the second parameter, it executes one and strengthens step in advance
A rapid transmission unit to adjust electronic device, to generate output signal, output signal is transmitted to circumscribed from transmission unit
Device.Electronic device above-mentioned can be a hand-held arithmetic unit (such as smart phone or tablet computer).It is above-mentioned external
It is (such as general that formula device can be another hand-held arithmetic unit (such as smart phone or tablet computer), portable equipment
Universal serial bus storage device, external connected hand disk or projector) or an electricity that can be connected with serial bus or hot inserted mode
Sub-device.
The present invention also provides a kind of methods of trained balanced device comprising following steps: by one first yield value by one
Training sequence is amplified to a gain signal, and gain signal has the one first maximum voltage amplitude of oscillation, and the first maximum voltage amplitude of oscillation exceeds
Term of reference in one first Fixed Time Interval unit between two voltage values；The first yield value is reduced step by step to one second increasing
Benefit value, until gain signal has the one second maximum voltage amplitude of oscillation, the second maximum voltage amplitude of oscillation is between one second set time
Every in the term of reference in unit between two voltage values；After reducing the first yield value to the second yield value, mended by first
It repays value to compensate gain signal to an equalizing signal, equalizing signal has a third maximum voltage amplitude of oscillation, third maximum voltage pendulum
Width is beyond the term of reference between two voltage values in a third Fixed Time Interval unit；And the first offset is adjusted to one
Second offset, until equalizing signal has one the 4th maximum voltage amplitude of oscillation, it is fixed that the 4th maximum voltage amplitude of oscillation is located at one the 4th
In term of reference in time interval unit between two voltage values.
The present invention also provides a kind of methods of trained balanced device comprising the following steps: will be instructed by one first yield value
Practice sequence and be adjusted to a gain signal, gain signal has the one first maximum voltage amplitude of oscillation, and the first maximum voltage amplitude of oscillation is located at one
In term of reference in first Fixed Time Interval unit between two voltage values；The first yield value is improved step by step to one second increasing
Benefit value, until gain signal has the one second maximum voltage amplitude of oscillation, the second maximum voltage amplitude of oscillation exceeded between one second set time
Every the term of reference in unit between two voltage values；Second yield value is reduced into a grade, so that gain signal has one
The third maximum voltage amplitude of oscillation, the third maximum voltage amplitude of oscillation are located in a third Fixed Time Interval unit between two voltage values
In term of reference；After the second yield value is reduced a grade, gain signal is compensated to an equilibrium by the first offset
Signal, equalizing signal have one the 4th maximum voltage amplitude of oscillation, and the 4th maximum voltage amplitude of oscillation exceeds one the 4th Fixed Time Interval list
Term of reference in position between two voltage values；And adjustment the first offset to one second offset, until equalizing signal has
Have one a 5th maximum voltage amplitude of oscillation, the 5th maximum voltage amplitude of oscillation be located in one the 5th Fixed Time Interval unit two voltage values it
Between term of reference in.
Now via the commentary following detailed description of to illustrative embodiments, alterations and scope of the claims, make
Of the invention these and other elements, step, feature, benefit and advantage come into focus.
Detailed description of the invention
Fig. 1 is the system block diagrams of first embodiment of the invention；
Fig. 2 is one group of referential data of comparison；
Fig. 3 is frequency response (frequency response) of the signal after a transmission line；
Fig. 4 is frequency response of the signal after a balanced device；
Fig. 5 is the signal that an electronic device is exported according to an output parameter from its output unit；
Fig. 6 is a flow chart of the output signal that the present invention adjusts an electronic device according to a training signal；
Fig. 7 is the training signal that an electronic device is sent to another electronic device；
Fig. 8 is the system block diagrams of second embodiment of the invention；
The signal that Fig. 9 A is exported by the balanced device of an electronic device；
The signal that Fig. 9 B is exported by the monitor of an electronic device；
Figure 10 is a flow chart of the output signal that the present invention adjusts an electronic device according to a training signal；
Figure 11 A is a training signal in the part of a time interval；
Figure 11 B is an output signal of an automatic gain control unit in the part of a time interval；
Figure 11 C is an output signal of a balanced device in the part of a time interval；
Figure 11 D is an output signal of a balanced device in the part of a time interval；
Figure 12 is a flow chart of the output signal that the present invention adjusts an electronic device according to a training signal；
Figure 13 A be the present invention by be sent to an electronic device one signal and the figure at a glance that obtains；
Figure 13 B be the present invention by be sent to an electronic device one signal and the figure at a glance that obtains.
Description of symbols: 2- signal transmssion line；The first electronic device of 4-；The port 6-；8- second electronic device；9a- is defeated
Unit out；9b- receiving unit；10- controller；12- receiving unit；14- output unit；16- balanced device；18- monitor；20-
Processing unit；22- internal storage location；24- automatic gain control unit；26- digital analog converter；28- digital analog converter；
Am- amplitude；DE- low-and high-frequency energy differences；Di- low-and high-frequency energy differences；Ds- signal；It is EH1- high；It is EH2- high；ISI1- symbol
Border interference；ISI2- accords with border interference；ISI3- accords with border interference；ISI4- accords with border interference；M1- voltage value；M2- voltage value；The Os- amplitude of oscillation；
Pa- package；Re- reference voltage；So- signal；The first signal of S1-；S2- second signal；S01-S04- step；S11-S14- step
Suddenly；S21-S25- step；Ta- output end；Ts- output end；T1- time point；T2- time point；VHSpecial value；VLCertain number
Value.
Specific embodiment
Schema discloses illustrative embodiments of the invention.It is not set out all embodiments.It can additionally or alternatively be used
His embodiment.To save space or more effectively illustrating, apparent or unnecessary details can be omitted.On the contrary, implementable one
A little embodiments are without disclosing all details.When same numbers occur in different drawings, refer to same or like element or step
Suddenly.
When be described below read together with alterations when, aspect of the invention can be more fully understood by, the equal accompanying
The property of schema should be regarded as illustrative and not restrictive.The schemas such as this are not necessarily drawn to scale, but emphasize original of the invention
Reason.
Fig. 1 is the schematic diagram of first embodiment of the invention.As shown in Figure 1, one end of a bars transmission line 2 is inserted into one
The Single port 6 (such as port serial bus (Serial Bus)) of first electronic device 4, the other end are then connected to one second electronics dress
Set 8.First electronic device 4 and second electronic device 8 can be (but not limiting) hand-held arithmetic unit (such as smart phone respectively
Or tablet computer), laptop, desktop computer, portable equipment (such as universal serial bus (Universal Serial
Bus, abbreviation USB) storage device, external connected hand disk or projector) any applicable serial bus or heat insertion (Hot Plug)
The electronic device that mode connects.Signal transmssion line 2 can be (but not limiting) serial bus connecting line, such as universal sequence
Busbar connector (USB) transmission line, sequence advanced technology attachment (Serial Advanced Technology Attachment) connection
Line, high-definition multimedia interface (High Definition Multimedia Interface) connecting line or action Enterprise Administration Office
It manages device interface (Mobile Industry Processor Interface).It is held for example, the first electronic device 4 can be one
Formula arithmetic unit (such as smart phone or tablet computer), second electronic device 8 can be an external connecting device, signal transmssion line 2
It can be a serial bus connecting line (such as USB transmission line), port 6 can be a serial bus port (such as end USB
Mouthful).External connecting device above-mentioned can be (but not limiting) another hand-held arithmetic unit (such as smart phone or tablet computer),
One portable equipment (such as USB storage device, external connected hand disk or projector) or an applicable serial bus or the connection of hot inserted mode
Electronic device.
First electronic device 4 includes a controller 10, a receiving unit 12 and an output unit (or transmitting device) 14.
Receiving unit 12 and output unit 14 can be a circuit or one of (but not limiting) physical layer (physical layer) respectively
Element.Controller 10 is respectively coupled to receiving unit 12 and output unit 14.Receiving unit 12 is for receiving second electronic device 8
The signal that one output unit 9a is transmitted；Output unit 14 is used to transmit or send a signal to a reception of second electronic device 8
Unit 9b.Receiving unit 12 includes a balanced device (equalizer) 16 and a monitor 18.The effect of balanced device 16 is to compensate
(high frequency) energy loss of the signal that output unit 9a is transmitted in transmission process is (including (high caused by signal transmssion line 2
Frequently energy loss)), and compensated signal is output to monitor 18 or processing unit from an output end Ts of balanced device 16
20.Balanced device 16 can be (but not limiting) applicable equalizer (adaptive equalizer).One input of monitor 18
The output end Ts of end coupling balanced device 16.The effect of monitor 18 is the signal that observation balanced device 16 is exported from output end Ts,
And controller 10 is arrived according to the signal transmission one monitoring signals of output end Ts output (it can be digital signal).Monitor 18 can
To be or may include a voltage monitor, an eye figure monitor (eye diagram monitor) or one contains
The monitor of integrator (integrator).
Controller 10 includes that (such as static random is deposited for a processing unit (processing unit) 20 and an internal storage location 22
Take memory (static random access memory)).Processing unit 20 is respectively coupled to monitor 18 and internal storage location 22.
The output end Ts of the input terminal coupling balanced device 16 of processing unit 20.Two input terminals of processing unit 20 are respectively coupled to export
One input terminal of unit 14 and an input terminal of balanced device 16.One group of referential data is stored in internal storage location 22, to provide
The reference frame that processing unit 20 compares.This group of referential data includes multiple than logarithm (such as multiple peak levels
(peaking level)) and each length of transmission line more corresponding than logarithm and/or be output parameter (including the amplitude of oscillation
(swing) or the gap of the size of amplitude (amplitude) and high-frequency energy and low frequency energy), as shown in Figure 2.Above-mentioned
Those can be multiple energy compensating values than logarithm, for example, can be different length of transmission line high-frequency energy offset (
It is exactly peak levels, unit can be decibel (dB)).The above is also possible to multiple low-and high-frequency energy differences than logarithm
It is worth (namely energy loss (loss)), such as can be high-frequency energy caused by different length of transmission line and low frequency energy
Gap.In the present invention, second electronic device 8 can also not have to be directly connected to the first electronics dress by signal transmssion line 2
Set 4；In this case, the length of transmission line is zero.
Processing unit 20 can be by training signal (such as training sequence (training that output unit 9a is transmitted
Sequence it)) trains balanced device 16, and after balanced device 16 completes training, obtains the parameter or numerical value of balanced device 16, example
Energy compensating value (such as high-frequency energy offset, or be peak levels) such as balanced device 16 for compensation training signal.This
Energy compensating value can be with compensation training signal in (high frequency) energy loss or loss after transmission line 2, that is, training letter
Low-and high-frequency energy differences (or gap for high-frequency energy and low frequency energy) number after transmission line 2.In length of transmission line
In the case where being zero (namely second electronic device 8 does not have to transmission line 2 and is directly connected to the first electronic device 4), this energy
Offset can be (but not limiting) zero, as shown in Figure 2.First electronics dress is connected to by transmission line 2 in second electronic device 8
In the case where setting 4, the signal (including training signal) that output unit 9a is transmitted can generate (high frequency) energy after transmission line 2
Amount loss or loss, the gap DE of high-frequency energy as shown in Figure 3 and low frequency energy；By balanced device 16 with this energy compensating value
It compensates, then the high-frequency energy for the signal (including training signal) that output unit 9a can be made to be transmitted is equal to low frequency energy, such as
Shown in Fig. 4.
Then, processing unit 20 is by the energy compensating value (or low-and high-frequency energy differences) of acquisition and above-mentioned alignment parameters
Be compared, so obtain transmission line 2 length and/or be an output parameter, this output parameter includes the low-and high-frequency of signal
Amplitude of oscillation size (as shown in Figure 5 pendulum of the energy difference away from (the difference Di of high-frequency energy and low frequency energy as shown in Figure 5) and signal
Width Os) or amplitude size (amplitude A m) as shown in Figure 5.Then, processing unit 20 adjusts output unit according to this output parameter
14, allow output unit 14 to transmit or send a signal (its difference that can be analog form shown in fig. 5 according to this output parameter
Signal So) arrive second electronic device 8 receiving unit 9b.The present invention can be by strengthening (pre-emphasis) in advance or going to strengthen
(de-emphasis) mode makes the signal for being transmitted to receiving unit 9b meet output when output unit 14 exports
Low-and high-frequency energy difference in parameter away from.
In Fig. 5, the signal So that output unit 14 exports includes transition position (transition bit) and non-transition position
(non-transition bit).Transition position is the high frequency section of signal So；Non- transition position is the low frequency part of signal So.This reality
Apply example can strengthen in advance or go strengthen by way of, make signal So high-frequency energy and low frequency energy gap be equal to it is above-mentioned
Low-and high-frequency energy differences Di.
Below by way of the step S01 to step S04 of Fig. 6, when describing the first electronic device 4 connection second electronic device 8, the
The mode of one electronic device, 4 adjust automatically output signal.
Step S01:
At the initial stage of the first electronic device 4 connection second electronic device 8, the receiving unit 12 of the first electronic device 4 is received
The training signal (a such as training sequence) transmitted to the output unit 9a of second electronic device 8.This training signal can be
The differential signal that (but not limiting) transmits in an analogue form.Fig. 7 is an example of training signal.As shown in fig. 7, training signal packet
Containing multiple package Pa, and each package Pa composition (or ingredient) having the same and identical transmission time T.
Step S02:
Processing unit 20 trains balanced device 16 using training signal, and after the training for completing balanced device 16, obtains equal
Energy compensating value (such as high-frequency energy offset, or be peak levels) of the weighing apparatus 16 for compensation training signal.This energy
Offset can be with compensation training signal in (high frequency) energy loss or loss (such as high-frequency energy and low frequency after transmission line 2
The gap of energy), and it is used to compensate the signal that subsequent output unit 9a is sent to receiving unit 12 by balanced device 16.
In step S02, processing unit 20 observes or detects the training process of balanced device 16 using monitor 18.It instructs herein
During white silk, monitor 18 observes the signal (hereinafter referred to as " output signal Eo ") that balanced device 16 is exported from output end Ts, and root
Processing unit 20 is arrived according to output signal Eo transmission one monitoring signals (it can be a digital signal).Processing unit 20 is with identical
18 institute of monitor is constantly analyzed, detects or observed to time interval (it may be greater than or the transmission time T equal to package Pa)
The monitoring signals sent.Because training signal contains, there are many identical package Pa, and processing unit 20 can be according to certain
Monitoring signals in a time interval come judge the high-frequency energy of output signal Eo and low frequency energy it is whether (generally) equal or
It is whether the eye figure (eye diagram) of output signal Eo reaches a particular state (such as optimum state).
When the monitoring signals that monitor 18 exports show that the high-frequency energy of output signal Eo and low frequency energy do not have (substantially
On) when not reaching particular state, processing unit 20 readjusts the ginseng of balanced device 16 for equal or display output signal Eo eye figure
Number, the monitoring signals then exported again according to monitor 18 judge whether the high-frequency energy of output signal Eo and low frequency energy are (big
In cause) whether equal or output signal Eo eye figure reach particular state.Above procedure is repeated, is exported until monitor 18
Monitoring signals show that the high-frequency energy of output signal Eo is equal with low frequency energy (generally) or show the eye of output signal Eo
Until figure has reached particular state.When the monitoring signals that monitor 18 exports show the high-frequency energy and low frequency energy of output signal Eo
(generally) when equal or display output signal Eo eye figure has reached particular state, processing unit 20 completes balanced device 16
Training and obtain energy compensating value that balanced device 16 loses or be lost for compensation training signal energy (it is balanced device 16
One parameter or a numerical value).In the present invention, step S02 can be completed by way of training balanced device 16.
Step S03:
After obtaining energy compensating value of the balanced device 16 for compensation training signal, the progress of processing unit 20 one is tabled look-up dynamic
Make or a comparison movement, that is, will in this energy compensating value and internal storage location 22 storage those of than logarithm (such as front institute
State) it is compared.Then, processing unit 20 can learn the length of transmission line 2 and/or be to obtain corresponding output parameter
(it includes the gap of low-and high-frequency energy and the amplitude of oscillation of signal or amplitude size of signal).
Step S04:
After completing step S03, processing unit 20 adjusts output unit 14 according to the output parameter of acquisition, allows output unit
14 transmit or send a signal (such as differential signal of analog form shown in fig. 5) according to the output parameter of acquisition to the second electricity
The receiving unit 9b of sub-device 8.Therefore, the first electronic device 4 can be according to the parameter or numerical value of balanced device 16 (such as high frequency
Energy compensating value), adjustment output unit 14 is sent to the signal of second electronic device 8, and (it can be analog form shown in fig. 5
Differential signal).
Fig. 8 is the schematic diagram of second embodiment of the invention.As shown in figure 8, the receiving unit 12 of the first electronic device 4 also wraps
Include an automatic growth control (automatic gain control) unit 24 and two digital analog converter (digital-
To-analog converter) 26 and 28.One input of the output end Ta coupling balanced device 16 of automatic gain control unit 24
End.One output end of the input terminal coupling processing unit 20 of digital analog converter 26, the one of digital analog converter 26 are defeated
One input terminal of outlet coupling automatic gain control unit 24.One input terminal of digital analog converter 28 couples processing unit 20
An output end, digital analog converter 28 an output end coupling balanced device 16 an input terminal.In a second embodiment, it supervises
Survey device 18 can not need (but not limiting) include digital analog converter, with reduce monitor 18 occupy physical layer area with
And reduce the manufacturing expense of the first electronic device 4.
Automatic gain control unit 24 can receive the signal (including training signal) that output unit 9a is transmitted and adjust
(voltage) amplitude of oscillation for the signal (including training signal) that output unit 9a is transmitted, then (namely passes through signal adjusted
Cross the signal of the adjustment of automatic gain control unit 24) balanced device 16 is sent to from its output end Ta.Balanced device 16 can compensate certainly
The signal that dynamic gain control unit 24 is sent, then by compensated signal from its output end Ts be transmitted to monitor 18 or
Processing unit 20.Processing unit 20 can be used to control the number letter of automatic gain control unit 24 by digital analog converter 26
Number it is converted into analog signal, and sent to automatic gain control unit 24；Therefore, processing unit 20 is adjustable or control is automatic
Gain control unit 24 is used to adjust the yield value for the signal (including training signal) that output unit 9a is transmitted.Digital simulation turns
The digital signal that processing unit 20 is used to control balanced device 16 can be converted into analog signal by parallel operation 28, and be sent to balanced device
16；Therefore, adjustable (or control) balanced device 16 of processing unit 20 is (such as high for the energy compensating value of compensation training signal
Frequency energy compensating value, or be peak levels).
In this embodiment, the monitoring that the meeting of processing unit 20 constantly observation, detecting or research and application device 18 are sent
Signal (it the can be a digital signal) situation inner at same time interval (it is greater than or equal to above-mentioned transmission time T).
Because training signal includes many identical package Pa, the prison that processing unit 20 can be sent by monitor 18
Situation of the signal in some time interval is surveyed to judge the training signal adjusted by automatic gain control unit 24 or process
Whether the training signal (it is exported from the output end Ts of balanced device 16) that balanced device 16 compensates meets correlated condition.For example, processing
Unit 20 can be by detecting whether the monitoring signals that monitor 18 is sent occur transition in some time interval
(transition) mode, judge by automatic gain control unit 24 adjust training signal maximum (voltage) amplitude of oscillation or
Whether maximum (voltage) amplitude of oscillation of the training signal compensated by balanced device 16 is located at two special values (such as the first electronic device 4
Two voltage values of linear operation) between.
By taking Fig. 9 A and 9B as an example, the monitoring signals (signal Ds shown in namely Fig. 9 B) that monitor 18 is transmitted can pass through
The signal (it may include the first signal S1 and second signal S2 shown in Fig. 9 A) and two that balanced device 16 is exported from output end Ts
Special value two voltage value M1 and M2 of 4 linear operation of the first electronic device (as shown in Figure 9 A) obtains.For example, by first
The voltage value of signal S1 subtracts the voltage value of second signal S2 to obtain first voltage changing value, and voltage value M1 is subtracted electricity
Pressure value M2 is to obtain second voltage changing value.Then, first voltage changing value is subtracted second voltage changing value can be obtained by
Signal Ds.Then voltage value M2 can be subtracted by voltage value M1 as reference voltage Re to obtain.
In figures 9 b and 9, the monitoring signals (namely signal Ds) that monitor 18 is transmitted are patrolled when time point T1
Volume level (logic level) by logic 1 switchs to logical zero, and (namely signal Ds becomes less than reference by being greater than reference voltage Re
Voltage Re), thus a transition has occurred.Then, when time point T2, logic level is switched to signal Ds by logical zero
Logic 1 (namely signal Ds becomes greater than reference voltage Re by being less than reference voltage Re), thus another secondary transition has occurred.Letter
Transition can occur for number Ds, and such case, which is represented from the signal that output end Ts export, has the amplitude of oscillation to exceed between two voltage value M1 and M2
Range.If signal Ds is there is no transition in some time interval, such case, which represents, passes through automatic growth control list
The maximum amplitude of oscillation of training signal or the maximum amplitude of oscillation of the training signal compensated by balanced device 16 of 24 adjustment of member are located at two voltages
Range between value M1 and M2.
Second embodiment shown in Fig. 8 can complete step S01 shown in fig. 6 to step S04.Related second embodiment is held
The part of row step S01, S03 and S04, please refer to the related description of Fig. 6.Below by way of the step S11 to step S14 of Figure 10,
Describe a kind of mode that second embodiment completes step S02.In step S11 to step S14, processing unit 20 can constantly be seen
Monitoring signals that monitor 18 is sent are examined or detect (to be greater than or when equal to above-mentioned transmission at same time interval
Between T) inner situation.In addition, any one time interval mentioned in step S11 to step S14 is all identical, and every
One time interval can be greater than or equal to above-mentioned transmission time T.
Step S11:
Automatic gain control unit 24 increases to a certain gain value (such as maxgain value) gain of training signal,
Make the training signal (hereinafter referred to as " signal SA ", from automatic gain control unit adjusted by automatic gain control unit 24
24 output end Ta output) in the maximum amplitude of oscillation (maximum voltage of its low frequency energy that can be signal SA of a time interval
The amplitude of oscillation) exceed two special value VHAnd VLBetween range, as shown in Figure 11 A.Numerical value VHIt can be above-mentioned voltage value M1, number
Value VLIt can be above-mentioned voltage value M2.In addition, balanced device 16 is used to the energy of thermal compensation signal SA before carrying out step S13
Offset (such as high-frequency energy offset) is cut to the first energy compensating value (such as the smallest energy compensating value), makes balanced device
16 do not compensate signal SA temporarily.In this step, because the gain of automatic gain control unit 24 be adjusted to it is above-mentioned
Certain gain value and the compensation of balanced device 16 be cut to the first above-mentioned energy compensating value, so processing unit 20 is allowed to detect
Monitoring signals that monitor 18 is sent are measured in time interval transition at least once.
Step S12:
After step s 11, automatic gain control unit 24 is downgraded since above-mentioned certain gain value to training signal
Yield value, until signal SA is located at two special value V in maximum (voltage) amplitude of oscillation of a time intervalHAnd VLBetween model
Until enclosing, as shown in Figure 11 B.In this step, when processing unit 20 detects the monitoring signals that monitor 18 is sent
All there is no transition in some time interval, representation signal SA is located at two certain numbers in the maximum amplitude of oscillation of a time interval
Value VHAnd VLBetween range.During this time, the stopping of processing unit 20 downgrades automatic gain control unit 24 to training signal
Yield value, the yield value for allowing automatic gain control unit 24 to downgrade for the last time (hereinafter referred to as " yield value GF ") come to subsequent
The signal (including the remaining part of training signal) that output unit 9a is sent to receiving unit 12 is adjusted.In addition, because from
The gain of dynamic gain control unit 24 is adjusted to yield value GF, transmits so processing unit 20 is allowed to detect monitor 18
All there is no transitions in a time interval for the monitoring signals come.After the completion of step S12, pass through two special value VHAnd VL
The low frequency energy of training signal can be obtained.
Step S13:
After completing step S12, balanced device 16 is increased for the energy compensating value of thermal compensation signal SA to the second energy
Offset (such as maximum energy compensating value) makes the signal SA (hereinafter referred to as " signal SE ", from equal compensated by balanced device 16
The output end Ts of weighing apparatus 16 is exported) in the maximum amplitude of oscillation (maximum of its high-frequency energy that can be signal SE of a time interval
Voltage swing) more than two special value VHAnd VLBetween range, as shown in Figure 11 C.In this step, because of balanced device 16
Compensation is increased to the second energy compensating value (its be greater than step S11 described in the first energy compensating value), so allowing processing unit
20 detect monitoring signals that monitor 18 is sent in time interval transition at least once.Complete step
After S13, the high-frequency energy of signal SE can be greater than the low frequency energy of signal SE.In addition, signal SE can be described in step S02
Output signal Eo.
Step S14:
After completing step S13, balanced device 16 is downgraded since the second above-mentioned energy compensating value for thermal compensation signal
The energy compensating value of SA, until signal SE is located at two special value V in the maximum amplitude of oscillation of a time intervalHAnd VLBetween model
Until enclosing, as shown in Figure 11 D.In this step, when processing unit 20 detects the monitoring signals that monitor 18 is sent
All there is no transition in some time interval, representation signal SE is located at two certain numbers in the maximum amplitude of oscillation of a time interval
Value VHAnd VLBetween range.During this time, processing unit 20 can stop downgrading the energy that balanced device 16 is used to thermal compensation signal SA
Offset and record the energy compensating value (hereinafter referred to as " energy compensating value PA ") that downgrades of last time.In addition, balanced device 16
It can be compensated with energy compensating value PA come the signal for being sent to receiving unit 12 to subsequent output unit 9a.In step S14,
Because the compensation of balanced device 16 is adjusted to energy compensating value PA, (it is greater than the first energy compensating value described in step S11, but small
The second energy compensating value described in step S13), so processing unit 20 is allowed to detect the monitoring that monitor 18 is sent
All there is no transitions in a time interval for signal.
After completion of the step s 14, because the high-frequency energy (generally) of signal SE is equal to the low frequency energy of signal SE, institute
It is not only completed the training of balanced device 16 with processing unit 20, therefore obtains the energy compensating that balanced device 16 is used to thermal compensation signal SA yet
Value PA (its energy compensating value that compensation training signal is used for for balanced device 16 described in step S02).Obtaining energy compensating value
After PA, processing unit 20 carries out step S03 according to energy compensating value PA.In a second embodiment, step S11 to step S14
For a kind of mode of training balanced device 16.
Below by way of the step S21 to step S25 of Figure 12, the another way that second embodiment completes step S02 is described.
In step S21 to step S25, the meeting of processing unit 20 monitoring signals that constantly observation monitor 18 is sent are identical
The inner situation of time interval (it may be greater than or equal to above-mentioned transmission time T).In addition, any one is arrived in step S21
The time interval mentioned in step S25 is all identical, and each time interval can be greater than or equal to above-mentioned transmission
Time T.
Step S21:
Yield value of the automatic gain control unit 24 to training signal is cut to a certain gain value (such as least gain
Value), make the training signal (hereinafter referred to as " signal SG ", from automatic growth control adjusted by automatic gain control unit 24
The output end Ta of unit 24 is exported) in the maximum amplitude of oscillation (maximum of its low frequency energy that can be signal SG of a time interval
Voltage swing) it is located at two special value VHAnd VLBetween range.Numerical value VHIt can be above-mentioned voltage value M1, numerical value VLIt can be with
It is above-mentioned voltage value M2.In addition, balanced device 16 is used to the energy compensating value (example of thermal compensation signal SG before carrying out step S24
Such as high-frequency energy offset) it is cut to the first energy compensating value (such as the smallest energy compensating value), keep balanced device 16 temporary not
Signal SG is compensated.In this step, because the gain of automatic gain control unit 24 is adjusted to above-mentioned specific increasing
The compensation of beneficial value and balanced device 16 is cut to the first above-mentioned energy compensating value, so processing unit 20 is allowed to detect monitoring
All there is no transitions in a time interval for the monitoring signals that device 18 is sent.
Step S22:
After step s 21, automatic gain control unit 24 is increased since above-mentioned certain gain value to training signal
Yield value, until signal SG a time interval the maximum amplitude of oscillation exceed two special value VHAnd VLBetween range until
(yield value at this time is known as " yield value Gn ").In this step, it is sent when processing unit 20 detects monitor 18
Monitoring signals transition at least once in some time interval, maximum (voltage) amplitude of oscillation of representation signal SG is specific beyond two
Numerical value VHAnd VLBetween range.In addition, being allowed because the gain of automatic gain control unit 24 is adjusted to yield value Gn
Processing unit 20 detects monitoring signals that monitor 18 is sent in time interval transition at least once.
Step S23:
After completion of the step s 22, primary before yield value of the automatic gain control unit 24 to training signal being adjusted back to
Yield value (hereinafter referred to as " yield value Gn-1 "), be located at signal SG once again in maximum (voltage) amplitude of oscillation of a time interval
Two special value VHAnd VLBetween range.In this step, because the gain of automatic gain control unit 24 is adjusted to gain
Value Gn-1, so allow processing unit 20 to detect the monitoring signals that monitor 18 is sent all does not have in a time interval
Transition occurs.After step S23, automatic gain control unit 24 can come to transmit subsequent output unit 9a with yield value Gn-1
Signal (including the remaining part of training signal) to receiving unit 12 is adjusted.The present embodiment can after the completion of step S23,
Pass through two special value VHAnd VLObtain the low frequency energy of training signal.
Step S24:
After completing step S23, balanced device 16 is increased for the energy compensating value of thermal compensation signal SG to the second energy
Offset (such as maximum energy compensating value) makes the signal SG (hereinafter referred to as " signal SQ ", from equal compensated by balanced device 16
The output end Ts of weighing apparatus 16 is exported) in the maximum amplitude of oscillation (maximum of its high-frequency energy that can be signal SQ of a time interval
Voltage swing) more than two special value VHAnd VLBetween range.In this step, because the compensation of balanced device 16 increased to
Second energy compensating value (it is greater than the first energy compensating value described in step S21), so processing unit 20 is allowed to detect monitoring
The monitoring signals that device 18 is sent are in time interval transition at least once.After completing step S24, signal SQ
High-frequency energy can be greater than signal SQ low frequency energy.In addition, signal SQ can be output signal Eo described in step S02.
Step S25:
After completing step S24, balanced device 16 is downgraded since the second above-mentioned energy compensating value for thermal compensation signal
The energy compensating value of SG, until signal SQ is located at two special value V in the maximum amplitude of oscillation of a time intervalHAnd VLBetween model
Until enclosing.In this step, when processing unit 20 detects monitoring signals that monitor 18 is sent between sometime
Every inner all there is no transition, representation signal SQ is located at two special value V in the maximum amplitude of oscillation of a time intervalHAnd VLBetween
Range.During this time, processing unit 20 stops downgrading balanced device 16 for the energy compensating value of thermal compensation signal SG and remember
The energy compensating value (hereinafter referred to as " energy compensating value PB ") that record last time downgrades.In addition, balanced device 16 can be with energy compensating
Value PB compensates come the signal for being sent to receiving unit 12 to subsequent output unit 9a.In step s 25, because of balanced device 16
Compensation be adjusted to energy compensating value PB (its be greater than step S21 described in the first energy compensating value, but be less than step S24 institute
The the second energy compensating value stated), so processing unit 20 is allowed to detect monitoring signals that monitor 18 is sent for the moment
Between be spaced in all there is no transitions.
After completion of step s 25, because the high-frequency energy (generally) of signal SQ is equal to the low frequency energy of signal SQ, institute
It is not only completed training (or adjustment) process of balanced device 16 with processing unit 20, therefore obtains balanced device 16 yet and be used to thermal compensation signal
The energy compensating value PB (its energy compensating value that compensation training signal is used for for balanced device 16 described in step S02) of SG.It is obtaining
After obtaining energy compensating value PB, processing unit 20 carries out step S03 according to energy compensating value PB.In a second embodiment, step
S21 to step S25 is the another way of training (or adjustment) balanced device 16.
By above-mentioned first or second embodiments it is found that working as the signal transmssion line that the first electronic device 4 passes through different length
When being connected to second electronic device 8 (or being electronic product), the first electronic device 4 can be according to the length of signal transmssion line
It is transmitted to the output signal of receiving unit 9b of second electronic device 8 to adjust output unit 14 (it can be in an analogue form
The differential signal of transmission).To use the first signal transmssion line or second signal transmission line to connect the first electronic device 4 and the second electricity
For sub-device 8.When the first electronic device 4 connects second electronic device 8 by the first signal transmssion line, the first electronics
Device 4 can adjust output unit 14 according to the length of the first signal transmssion line, allow the reception list for being transmitted to second electronic device 8
The signal (hereinafter referred to as " the first signal ") of first 9b meets the first output parameter when output unit 14 exports, and (it includes high
The gap and the amplitude of oscillation of frequency energy and low frequency energy or the numerical value of amplitude).When the first electronic device 4 is connected by second signal transmission line
When connecing second electronic device 8, the first electronic device 4 can adjust output unit according to the length of second signal transmission line
14, make the signal (hereinafter referred to as " second signal ") for being transmitted to the receiving unit 9b of second electronic device 8 defeated in output unit 14
Meet the second output parameter when out (it includes the gap of high-frequency energy and low frequency energy and the numerical value of the amplitude of oscillation or amplitude).The
One signal transmssion line and second signal transmission line can be the different serial bus connecting line of (but not limiting) two length, example
Such as different universal serial bus (USB) transmission line of two length, sequence advanced technology attachment connecting line, the more matchmakers of fine definition
Body interface connecting line or action Industry Processor Interface.
It is greater than or equal to 90 times, 100 times or 110 of the length of the first signal transmssion line in the length of second signal transmission line
In the case where times, an amplitude of oscillation (amplitude of oscillation of its low-frequency component for can be second signal) of the second signal in port 6 can be big
In or equal to the first signal 1.3 times of an amplitude of oscillation (amplitude of oscillation of its low-frequency component that can be the first signal) of port 6,
1.4 times or 1.5 times.In addition to this, an amplitude of oscillation of the low-frequency component of second signal received by second electronic device 8 can be big
In or equal to 1.3 times, 1.4 times or 1.5 of an amplitude of oscillation of low-frequency component of the first signal received by second electronic device 8
Times.
After second electronic device 8 receives the first signal by the first signal transmssion line, second electronic device 8 can be with
Schemed at a glance by the first signal, as shown in FIG. 13A.In figure 13a, (Inter Symbol is interfered on two symbol borders
Interference) summation of ISI1 and ISI2 is less than or equal to 0.3 times, 0.2 times or 0.1 times of the high EH1 of eye.In addition,
After two electronic devices 8 receive second signal by second signal transmission line, second electronic device 8 can pass through second signal
Another figure is obtained, as shown in Figure 13 B.In Figure 13 B, it is high that the summation of two symbol border interference ISI3 and ISI4 is less than or equal to eye
0.3 times, 0.2 times or 0.1 times of EH2.In the example of Figure 13 A and Figure 13 B, the length of second signal transmission line can be greater than or
Equal to 90 times, 100 times or 110 times of the length of the first signal transmssion line.
In addition to signal transmssion line 2 come other than connecting the first electronic device 4 and second electronic device 8, second electronic device 8
It can also (such as bluetooth (Bluetooth), ultra wide band (Ultra-wideband), Wireless Fidelity through wireless communication
(Wireless Fidelity), radio frequency identification (Radio Frequency Identification), near radio are logical
Believe (Near Field Communication) or purple honeybee (ZigBee)) the first electronic device 4 of connection.In this case,
One electronic device 4 receives training signal (such as training sequence that second electronic device 8 is transmitted by above-mentioned communication
Column) and the signal that exports of transmission output unit 14 to second electronic device 8.By mode described in Fig. 6, Figure 10 or Figure 12,
First electronic device 4 can be learnt between stream oriented device 4 and 8 by the energy compensating value that balanced device 16 is used to compensation training signal
(wireless) transmission range and corresponding output parameter (it includes the size and high-frequency energy and low frequency energy of the amplitude of oscillation (or amplitude)
The gap of amount), detailed content please refers to related narration, is no longer described in detail herein.
The above by embodiment illustrates the features of the present invention, and its object is to make to be familiar with the operator to will appreciate that this hair
Bright content is simultaneously implemented accordingly, protection scope rather than limiting the invention, therefore, it is all other without departing from disclosed spirit
The equivalent modification or modification completed should be included in this case protection scope.
Claims (20)
1. a kind of method of receiving and transmitting signal characterized by comprising
Based on the balanced device for the training sequence training electronic device for being transmitted to an electronic device from external connecting device, to obtain
One first parameter, the balanced device compensate the training sequence according to first parameter, wherein first parameter with it is described
Difference between the high-frequency energy and low frequency energy of training sequence is related, and can be used as the compensation external connecting device be transmitted to it is described
The energy compensating value of the signal of electronic device；
Compare first parameter and one group of reference value, to obtain one second parameter, second parameter and an output signal
The amplitude of oscillation size or amplitude size of difference and the output signal between high-frequency energy and low frequency energy are related；And
Based on second parameter, executes one and strengthen step in advance to adjust a transmission unit of the electronic device, to generate
The output signal, the output signal are transmitted to the external connecting device from the transmission unit.
2. the method according to claim 1, wherein the training balanced device, comprising:
Judge the high-frequency energy that the training sequence of the output of the balanced device is directed in a Fixed Time Interval unit
Whether amount is equal to its low frequency energy.
3. according to the method described in claim 2, it is characterized in that, the Fixed Time Interval unit is greater than or equal to an institute
Time interval needed for stating the package of training sequence.
4. the method according to claim 1, wherein the training sequence by connect the external connecting device and
The connecting line of the electronic device, from the external connecting device to the electronic device.
5. the method according to claim 1, wherein the electronic device includes that a universal serial bus connects
Mouthful, to receive the training sequence and the transmission output signal.
6. the method according to claim 1, wherein one group of reference value includes one group of energy differences.
7. the method according to claim 1, wherein
The training sequence includes multiple packages, the package composition having the same and identical transmission time.
8. the method according to claim 1, wherein the training balanced device, comprising:
By an automatic gain control unit of the electronic device, the gain of the training sequence is adjusted, and, by described
Equalizer compensation is directed to the training sequence of the output of the automatic gain control unit.
9. the method according to claim 1, wherein further comprising:
Compare first parameter and one group of reference value, to obtain a third parameter；And
Based on the third parameter, the pre- reinforcing step is executed to adjust the transmission unit of the electronic device, with life
At the output signal, the output signal is transmitted to the external connecting device from the transmission unit, the third parameter with
The voltage swing of the output signal is associated.
10. the method according to claim 1, wherein the training balanced device, comprising:
The training sequence is amplified to a gain signal by one first yield value, the gain signal has the first maximum electricity
The amplitude of oscillation is pressed, the first maximum voltage amplitude of oscillation is beyond the reference model between two voltage values in one first Fixed Time Interval unit
It encloses；
First yield value is reduced step by step to one second yield value, until the gain signal is put with one second maximum voltage
Width, the second maximum voltage amplitude of oscillation are located at the reference model in one second Fixed Time Interval unit between described two voltage values
In enclosing；
After reducing by first yield value to second yield value, by the first offset by the gain signal compensate to
One equalizing signal, the equalizing signal have a third maximum voltage amplitude of oscillation, and the third maximum voltage amplitude of oscillation exceeds a third
Term of reference in Fixed Time Interval unit between described two voltage values；And
First offset is adjusted to one second offset, until the equalizing signal has one the 4th maximum voltage amplitude of oscillation,
The 4th maximum voltage amplitude of oscillation is located at the term of reference in one the 4th Fixed Time Interval unit between described two voltage values
It is interior.
11. according to the method described in claim 10, it is characterized in that, described two voltage values include that the electronic device is linear
Two particular voltage level of operation.
12. according to the method described in claim 10, it is characterized in that, the first Fixed Time Interval unit, the second fixation
Time interval unit, third Fixed Time Interval unit and the 4th Fixed Time Interval unit are all larger than or are equal to the trained sequence
Time interval needed for the package of column.
13. according to the method described in claim 10, it is characterized in that, the first maximum voltage amplitude of oscillation and the second maximum voltage
The amplitude of oscillation is in the low frequency part of the gain signal, and the third maximum voltage amplitude of oscillation and the 4th maximum voltage amplitude of oscillation are in described
The high frequency section of equalizing signal.
14. the method according to claim 1, wherein the training balanced device includes:
The training sequence is adjusted to a gain signal by one first yield value, the gain signal has one first maximum
Voltage swing, the first maximum voltage amplitude of oscillation are located at the reference in one first Fixed Time Interval unit between two voltage values
In range；
First yield value is improved step by step to one second yield value, until the gain signal is put with one second maximum voltage
Width, the second maximum voltage amplitude of oscillation is beyond the reference model between described two voltage values in one second Fixed Time Interval unit
It encloses；
Second yield value is reduced into a grade, so that the gain signal has a third maximum voltage amplitude of oscillation, it is described
The third maximum voltage amplitude of oscillation is located in the term of reference in a third Fixed Time Interval unit between described two voltage values；
After second yield value is reduced a grade, the gain signal is compensated to an equilibrium by the first offset
Signal, the equalizing signal has one the 4th maximum voltage amplitude of oscillation, when the 4th maximum voltage amplitude of oscillation is fixed beyond one the 4th
Between term of reference in spacer unit between described two voltage values；And
First offset is adjusted to one second offset, until the equalizing signal has one the 5th maximum voltage amplitude of oscillation,
The 5th maximum voltage amplitude of oscillation is located at the term of reference in one the 5th Fixed Time Interval unit between described two voltage values
It is interior.
15. according to the method for claim 14, which is characterized in that the first Fixed Time Interval unit, second are fixed
Time interval unit, third Fixed Time Interval unit, the 4th Fixed Time Interval unit and the 5th Fixed Time Interval unit
Be all larger than or the package equal to the training sequence needed for time interval.
16. according to the method for claim 14, which is characterized in that the first maximum voltage amplitude of oscillation, the second maximum voltage
The amplitude of oscillation and the third maximum voltage amplitude of oscillation are in the low frequency part of the gain signal, and the 4th maximum voltage amplitude of oscillation and the 5th is most
Big voltage swing is in the high frequency section of the gain signal.
17. a kind of method of trained balanced device characterized by comprising
One training sequence is amplified to a gain signal by one first yield value, the gain signal has one first maximum electricity
The amplitude of oscillation is pressed, the first maximum voltage amplitude of oscillation is beyond the reference model between two voltage values in one first Fixed Time Interval unit
It encloses；
First yield value is reduced step by step to one second yield value, until the gain signal is put with one second maximum voltage
Width, the second maximum voltage amplitude of oscillation are located at the reference model in one second Fixed Time Interval unit between described two voltage values
In enclosing；
After reducing by first yield value to second yield value, by the first offset by the gain signal compensate to
One equalizing signal, the equalizing signal have a third maximum voltage amplitude of oscillation, and the third maximum voltage amplitude of oscillation exceeds a third
Term of reference in Fixed Time Interval unit between described two voltage values；And
First offset is adjusted to one second offset, until the equalizing signal has one the 4th maximum voltage amplitude of oscillation,
The 4th maximum voltage amplitude of oscillation is located at the term of reference in one the 4th Fixed Time Interval unit between described two voltage values
It is interior.
18. according to the method for claim 17, which is characterized in that described two voltage values include: electronic device is linearly grasped
Two particular voltage level made.
19. a kind of method of trained balanced device characterized by comprising
The training sequence is adjusted to a gain signal by one first yield value, the gain signal has one first maximum
Voltage swing, the first maximum voltage amplitude of oscillation are located at the reference in one first Fixed Time Interval unit between two voltage values
In range；
First yield value is improved step by step to one second yield value, until the gain signal is put with one second maximum voltage
Width, the second maximum voltage amplitude of oscillation is beyond the reference model between described two voltage values in one second Fixed Time Interval unit
It encloses；
Second yield value is reduced into a grade, so that the gain signal has a third maximum voltage amplitude of oscillation, it is described
The third maximum voltage amplitude of oscillation is located in the term of reference in a third Fixed Time Interval unit between described two voltage values；
After second yield value is reduced a grade, the gain signal is compensated to an equilibrium by the first offset
Signal, the equalizing signal has one the 4th maximum voltage amplitude of oscillation, when the 4th maximum voltage amplitude of oscillation is fixed beyond one the 4th
Between term of reference in spacer unit between described two voltage values；And
First offset is adjusted to one second offset, until the equalizing signal has one the 5th maximum voltage amplitude of oscillation,
The 5th maximum voltage amplitude of oscillation is located at the term of reference in one the 5th Fixed Time Interval unit between described two voltage values
It is interior.
20. according to the method for claim 19, which is characterized in that the first Fixed Time Interval unit, second are fixed
Time interval unit, third Fixed Time Interval unit, the 4th Fixed Time Interval unit and the 5th Fixed Time Interval unit
Be all larger than or the package equal to the training sequence needed for time interval.
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| CN109905338B (en) * | 2019-01-25 | 2021-10-19 | 晶晨半导体(上海)股份有限公司 | Method for controlling gain of multistage equalizer of serial data receiver |
| CN112399098B (en) * | 2020-12-02 | 2024-01-19 | 龙迅半导体（合肥）股份有限公司 | Automatic configuration method and system for output signal strength of HDMI transmitter |
| WO2022252197A1 (en) * | 2021-06-03 | 2022-12-08 | 华为技术有限公司 | Transmitter, receiver, parameter adjustment method, serdes circuit and electronic device |
| CN117375538A (en) * | 2023-10-09 | 2024-01-09 | 新港海岸(北京)科技有限公司 | Attenuation compensation method and attenuation compensation circuit |
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