JP5596097B2 - Data communication apparatus and method - Google Patents

Description

  The present invention is mounted on an error rate measuring apparatus that measures a bit error rate of a signal under measurement input via a device under test, for example, and is input in parallel or parallel input data in which a delay shift occurs due to a change in temperature in the apparatus The present invention relates to a data communication apparatus and method for performing skew alignment of output data.

  In recent years, various digital communication apparatuses are required to have a larger capacity transmission capability with the increase in the number of users and the spread of multimedia communication. As an index for evaluating the quality of digital signals in these digital communication devices, a bit error rate defined as a comparison between the number of received code errors and the total number of received data is known. ing.

  In addition, a test signal including fixed data is transmitted to a device under test (Device Under Test: DUT) such as a light conversion component to be tested, and becomes a reference to the signal under measurement input via the device under test. As an apparatus for comparing the reference signal with the bit unit and detecting the error rate of the signal under measurement, for example, an apparatus as disclosed in Patent Document 1 below is known.

JP 2007-274474 A

  By the way, in this type of error rate measuring apparatus, a pulse pattern generator for transmitting a reference data signal of a predetermined pattern to a device under test corresponding to recent high-speed data communication is, for example, as shown in FIG. It has a configuration.

  As shown in FIG. 3, the pulse pattern generator 50 includes an externally or internally generated reference clock signal and a divided clock signal obtained by dividing the reference clock signal by 1 / N (N is a natural number) by the divider 51. Are compared by the phase comparison unit 52, and the delay amount of the IQ modulation unit 53 is adjusted by the control of the control unit 55 in accordance with the phase difference. The delay circuit unit 54 controls the delay amount of the divided clock signal from the IQ modulation unit 53 in order to match the skew of the parallel data of a predetermined pattern input from the data generation unit 56 to the data multiplexing unit 57. It is adjusted by controlling. Then, the data multiplexing unit 57 outputs test serial data obtained by multiplexing the parallel data from the skewed data generation unit 56 to the device under test.

  However, since this type of delay circuit unit 54 has a configuration in which delay elements are connected in multiple stages, its driving capability depends on the temperature dependence in which the delay amount changes with changes in the environmental temperature such as the temperature inside the apparatus and the ambient temperature. Have Therefore, an error occurs in the delay amount due to a change in the internal temperature of the apparatus, and due to this delay shift, the skew of each parallel data input to the data multiplexing unit shifts, so that data cannot be normally multiplexed and operation is unstable. There was a problem of becoming.

  In addition, since this type of delay circuit unit 54 has a different amount of temperature change depending on the delay amount, it is necessary to define a temperature parameter to be considered when correcting the temperature of the circuit itself for each delay amount. Become very difficult.

  Therefore, the present invention has been made in view of the above problems, and can perform stable data transmission and reception by adjusting the amount of delay caused by environmental temperature without performing complicated correction processing. And an object is to provide a method.

In order to achieve the above object, the data communication device according to claim 1 includes a data processing unit 21 that generates and receives predetermined parallel data according to the number of transmission lanes;
A data transmission / reception unit 22 for transmitting serial data obtained by multiplexing the parallel data from the data processing unit according to a reference clock signal, and outputting the received serial data as parallel data separated into the number of transmission lanes;
An IQ modulator 12 that performs I / Q modulation on the divided clock signal obtained by dividing the reference clock signal by a predetermined dividing ratio, adjusts the angle to a predetermined phase angle, and outputs the resulting signal;
Multiple provided corresponding to the number of lanes of the transmission lanes, the line cormorants slow skew matching of the parallel data by the data processing unit on the basis of the divided clock signal after the angle adjustment output from the IQ modulator is corrected to output Extended circuit section 14;
A control unit 18 that performs phase angle adjustment control of the IQ modulation unit according to a phase difference between the divided clock signal before I / Q modulation by the IQ modulation unit and the divided clock signal after I / Q modulation; ,
In a data communication device comprising:
A temperature detection unit 15 that outputs temperature information detected inside the apparatus as an apparatus internal temperature T;
The control unit includes a difference temperature value obtained by subtracting the device internal temperature T detected by the temperature detection unit and a preset reference temperature T1, a bit rate value B of the serial data, and an operation compensation temperature of the device. minimum temperature were set at an intermediate temperature, said temperature detecting portion in hexadecimal by changing the delay circuit section at a temperature of the center value of the two points that fall error of the temperature information detected respectively at the highest temperature in The first center setting value, the second center setting value that is a decimal value of the first center setting value, and the second temperature at the intermediate temperature and the second temperature at the maximum temperature. A temperature that becomes a delay deviation correction value of the delay circuit unit obtained from a deviation Tap number indicating a difference between center setting values and a ps converted value obtained by converting a deviation amount of the deviation Tap number into ps. A characteristic coefficient alpha, the mUI the converted value C of the 360 ° in terms mUI before Symbol divided clock signal, and calculates an angle A for correcting the delay deviation amount of the delay circuit, the angle based on the angle A It characterized that you adjust the angle control of the divided clock signal output from the IQ modulator unit according to the temperature correction for the phase angle adjustment information is information.

The data communication device according to claim 2, wherein the data generator 16 generates and outputs predetermined parallel data corresponding to the number of transmission lanes;
The serial data obtained by multiplexing the parallel data from the data generator input via each transmission lane, a data multiplexing unit 17 to transmit in accordance with the reference clock signal,
An IQ modulator 12 that performs I / Q modulation on the divided clock signal obtained by dividing the reference clock signal by a predetermined dividing ratio, adjusts the angle to a predetermined phase angle, and outputs the resulting signal;
Multiple provided corresponding to the number of lanes of the transmission lanes, the line cormorants slow skew matching of the parallel data output from the data generating unit based on the divided clock signal after the angle adjustment output from the IQ modulator portion Extended circuit section 14;
A control unit 18 that performs phase angle adjustment control of the IQ modulation unit according to a phase difference between the divided clock signal before I / Q modulation by the IQ modulation unit and the divided clock signal after I / Q modulation; ,
In a data communication device comprising:
A temperature detection unit 15 that outputs temperature information detected inside the apparatus as an apparatus internal temperature T;
The control unit includes a difference temperature value obtained by subtracting the device internal temperature T detected by the temperature detection unit and a preset reference temperature T1, a bit rate value B of the serial data, and an operation compensation temperature of the device. minimum temperature were set at an intermediate temperature, said temperature detecting portion in hexadecimal by changing the delay circuit section at a temperature of the center value of the two points that fall error of the temperature information detected respectively at the highest temperature in The first center setting value, the second center setting value that is a decimal value of the first center setting value, and the second temperature at the intermediate temperature and the second temperature at the maximum temperature. A temperature that becomes a delay deviation correction value of the delay circuit unit obtained from a deviation Tap number indicating a difference between center setting values and a ps converted value obtained by converting a deviation amount of the deviation Tap number into ps. A characteristic coefficient alpha, the mUI the converted value C of the 360 ° in terms mUI before Symbol divided clock signal, and calculates an angle A for correcting the delay deviation amount of the delay circuit, the angle based on the angle A The angle adjustment control of the frequency-divided clock signal output from the IQ modulator is performed according to the temperature correction phase angle adjustment information that is information.

The data communication device according to claim 3, wherein the data separator 19 outputs parallel data obtained by separating the received serial data into the number of transmission lanes according to the reference clock signal;
A data receiver 20 for inputting the parallel data from the data separator via the transmission lane;
An IQ modulator 12 that performs I / Q modulation on the divided clock signal obtained by dividing the reference clock signal by a predetermined dividing ratio, adjusts the angle to a predetermined phase angle, and outputs the resulting signal;
Wherein in response to the lane number of the transmission lanes provided in plurality, the row cormorants delay skew alignment parallel data by the data receiving unit is input based on the divided clock signal after the angle adjustment output from the IQ modulator portion A circuit unit 14;
A control unit 18 that performs phase angle adjustment control of the IQ modulation unit according to a phase difference between the divided clock signal before I / Q modulation by the IQ modulation unit and the divided clock signal after I / Q modulation; ,
In a data communication device comprising:
A temperature detection unit 15 that outputs temperature information detected inside the apparatus as an apparatus internal temperature T;
The control unit includes a difference temperature value obtained by subtracting the device internal temperature T detected by the temperature detection unit and a preset reference temperature T1, a bit rate value B of the serial data, and an operation compensation temperature of the device. minimum temperature were set at an intermediate temperature, said temperature detecting portion in hexadecimal by changing the delay circuit section at a temperature of the center value of the two points that fall error of the temperature information detected respectively at the highest temperature in The first center setting value, the second center setting value that is a decimal value of the first center setting value, and the second temperature at the intermediate temperature and the second temperature at the maximum temperature. A temperature that becomes a delay deviation correction value of the delay circuit unit obtained from a deviation Tap number indicating a difference between center setting values and a ps converted value obtained by converting a deviation amount of the deviation Tap number into ps. A characteristic coefficient alpha, the mUI the converted value C of the 360 ° in terms mUI before Symbol divided clock signal, and calculates an angle A for correcting the delay deviation amount of the delay circuit, the angle based on the angle A The angle adjustment control of the frequency-divided clock signal output from the IQ modulator is performed according to the temperature correction phase angle adjustment information that is information.

The data communication method according to claim 4, wherein the step of generating and receiving predetermined parallel data according to the number of transmission lanes;
Transmitting serial data obtained by multiplexing the parallel data according to a reference clock signal, and outputting the received serial data as parallel data separated into the number of transmission lanes;
I / Q-modulating a frequency-divided clock signal obtained by frequency-dividing the reference clock signal by a predetermined frequency division ratio, adjusting the angle to a predetermined phase angle, and outputting the resultant signal;
Using the frequency- divided clock signal after angle adjustment , performing skew matching for each transmission lane at the time of input of the parallel data to be multiplexed and output of the parallel data obtained by separating the serial data;
Performing phase angle adjustment control according to a phase difference between the divided clock signal before I / Q modulation and the divided clock signal after I / Q modulation;
In a data communication method including:
Outputting temperature information detected in the apparatus as an apparatus internal temperature T;
The difference temperature value obtained by subtracting the internal temperature T from the preset reference temperature T1, the bit rate value B of the serial data, and the minimum, intermediate, and maximum temperatures of the device operation compensation temperature, respectively. detected first center set value and the first center settings delay circuit section Te temperature scent (14) by changing the setting the center value of 2 points entering errors hex the temperature information The difference Tap number indicating the difference between the second center setting value at the intermediate temperature and the second center setting value at the intermediate temperature and the difference Tap number indicating the difference between the second center setting value at the maximum temperature and the difference Tap a temperature characteristic coefficient α as a delay misalignment correction values of the delay circuit section obtained amount of deviation number from the ps converted value in terms of ps, the reference clock signal by a predetermined division ratio The 360 ° of the divided clock signal obtained by frequency from the mUI converted value C in terms mUI, calculates the angle A for correcting the delay deviation amount of the delay circuit, temperature compensation is the angle information based on the angle A Adjusting the angle of the divided clock signal before the I / Q modulation according to the phase angle adjustment information for use ;
It is characterized by including.

The data communication method according to claim 5, wherein the step of generating and outputting predetermined parallel data according to the number of transmission lanes;
Transmitting serial data obtained by multiplexing the parallel data input via the transmission lane according to a reference clock signal;
I / Q-modulating a frequency-divided clock signal obtained by frequency-dividing the reference clock signal by a predetermined frequency division ratio, adjusting the angle to a predetermined phase angle, and outputting the resultant signal;
Performing skew alignment of the multiplexed parallel data for each transmission lane using the divided clock signal after angle adjustment ;
Performing phase angle adjustment control according to a phase difference between the divided clock signal before I / Q modulation and the divided clock signal after I / Q modulation;
In a data communication method including:
Outputting temperature information detected in the apparatus as an apparatus internal temperature T;
The difference temperature value obtained by subtracting the internal temperature T from the preset reference temperature T1, the bit rate value B of the serial data, and the minimum, intermediate, and maximum temperatures of the device operation compensation temperature, respectively. detected first center set value and the first center settings delay circuit section Te temperature scent (14) by changing the setting the center value of 2 points entering errors hex the temperature information The difference Tap number indicating the difference between the second center setting value at the intermediate temperature and the second center setting value at the intermediate temperature and the difference Tap number indicating the difference between the second center setting value at the maximum temperature and the difference Tap a temperature characteristic coefficient α as a delay misalignment correction values of the delay circuit section obtained amount of deviation number from the ps converted value in terms of ps, the reference clock signal by a predetermined division ratio The 360 ° of the divided clock signal obtained by frequency from the mUI converted value C in terms mUI, calculates the angle A for correcting the delay deviation amount of the delay circuit, temperature compensation is the angle information based on the angle A Adjusting the angle of the divided clock signal before the I / Q modulation according to the phase angle adjustment information for use ;
It is characterized by including.

The data communication method according to claim 6, wherein the parallel data obtained by separating the received serial data into the number of transmission lanes is output according to a reference clock signal;
Inputting the parallel data via the transmission lane;
I / Q-modulating a frequency-divided clock signal obtained by frequency-dividing the reference clock signal by a predetermined frequency division ratio, adjusting the angle to a predetermined phase angle, and outputting the resultant signal;
Performing skew alignment of the input parallel data for each transmission lane using the divided clock signal after angle adjustment ;
Performing phase angle adjustment control according to a phase difference between the divided clock signal before I / Q modulation and the divided clock signal after I / Q modulation;
In a data communication method including:
Outputting temperature information detected in the apparatus as an apparatus internal temperature T;
The difference temperature value obtained by subtracting the internal temperature T from the preset reference temperature T1, the bit rate value B of the serial data, and the minimum, intermediate, and maximum temperatures of the device operation compensation temperature, respectively. detected first center set value and the first center settings delay circuit section Te temperature scent (14) by changing the setting the center value of 2 points entering errors hex the temperature information The difference Tap number indicating the difference between the second center setting value at the intermediate temperature and the second center setting value at the intermediate temperature and the difference Tap number indicating the difference between the second center setting value at the maximum temperature and the difference Tap a temperature characteristic coefficient α as a delay misalignment correction values of the delay circuit section obtained amount of deviation number from the ps converted value in terms of ps, the reference clock signal by a predetermined division ratio The 360 ° of the divided clock signal obtained by frequency from the mUI converted value C in terms mUI, calculates the angle A for correcting the delay deviation amount of the delay circuit, temperature compensation is the angle information based on the angle A Adjusting the angle of the divided clock signal before the I / Q modulation according to the phase angle adjustment information for use ;
It is characterized by including.

  According to the present invention, instead of the delay circuit unit that is difficult to correct the delay shift amount caused by the temperature change, the delay shift amount of the delay circuit unit is canceled by adjusting the phase angle of the IQ modulation unit. The parallel alignment of the parallel data output from the data generation unit to the data multiplexing unit and the parallel data output from the data separation unit to the data reception unit in the reception mode can be easily performed.

It is a schematic block diagram which shows the system configuration | structure of the form for transmission in the data communication apparatus which concerns on this invention. It is a schematic block diagram which shows the system configuration | structure of the form for transmission in the data communication apparatus which concerns on this invention. It is a schematic block diagram which shows the system configuration | structure of the conventional pulse pattern generator.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings. In addition, the present invention is not limited by this embodiment, and all other forms, examples, operation techniques, and the like that can be implemented by those skilled in the art based on this form are included in the scope of the present invention. .

  The data communication apparatus of the present invention, for example, transmits a reference pattern signal mounted on an error rate measuring apparatus that performs an evaluation test of a device under test to a pulse pattern generator (PPG) that transmits the signal to the device under test. And a signal receiving unit of an error detector (ED) that receives a signal of reference data transmitted to the device under test again and detects a bit error in this signal.

  In this device, the delay shift amount [ps] of the delay circuit unit whose driving capability is changed by the temperature change in the device is converted into an angle [°] corresponding to the bit rate value B of serial data to be transmitted or received. By adjusting the phase angle of the IQ modulator, the device performance can be stabilized so that the phase relationship between the clock signal and output data does not change without correcting the delay circuit that is difficult to correct the delay deviation. I am trying.

In the following description, for convenience of explanation, as a function of the apparatus, for example, a configuration requirement for transmitting data to the device under test is a “transmission form”, and a configuration for receiving data from the device under test, for example. The requirements will be described by dividing them into functions as “reception forms”.
[Transmission format]
First, a transmission form of the data communication apparatus 1 according to the present invention will be described. This embodiment can be mounted as a signal transmission unit of a pulse pattern generation unit in an error rate measurement device, for example.

  As shown in FIG. 1, the transmission mode in the data communication apparatus 1 of the present example includes a frequency divider 11, an IQ modulator 12, a phase comparator 13, a delay circuit 14, a temperature detector 15, The data generation unit 16, the data multiplexing unit 17, and the control unit 18 are provided.

  The frequency divider 11 is composed of a frequency dividing circuit that divides the period of a reference clock signal of a predetermined frequency generated externally or internally by 1 / N (N is a natural number), and the input reference clock signal is divided by 1 / N. The frequency-divided clock signal is output to the IQ modulator 12.

  The IQ modulator 12 includes an IQ modulator that performs I / Q modulation on the frequency-divided clock signal that has been frequency-divided by the frequency divider 11. The phase angle of the divided clock signal is adjusted, and the adjusted clock signal is output to the phase comparison unit 13 and the delay circuit unit 14, respectively. Further, when the temperature modulation phase angle adjustment information is input from the control unit 18, the IQ modulation unit 12 adjusts the angle of the divided clock signal to obtain a suitable delay amount in order to obtain a phase angle corresponding to the information. It is adjusted so that.

  The phase comparison unit 13 includes a phase comparator that compares the phase difference between the frequency-divided clock signal divided by the frequency division unit 11 and the clock signal from the IQ modulation unit 12. The phase of the peripheral clock signal is compared with the clock signal from the IQ modulation unit 12 that is regarded as parallel data input to the data multiplexing unit 17, and the control unit 18 uses the voltage value corresponding to the phase difference as phase comparison information. Is output.

  The delay circuit unit 14 is configured by a delay circuit having temperature dependency in which delay elements (gate delays) that adjust the delay amount of the clock signal by electrically switching in units of several picoseconds are connected in multiple stages. . The delay circuit unit 14 is provided in a number corresponding to the number of transmission lanes of parallel data output from the data generation unit 16, and the parallel data output from the data generation unit 16 is output to the data multiplexing unit 17. The delay amount is adjusted as appropriate to match the skew.

  The temperature detection unit 15 is composed of various temperature sensors such as a resistance temperature detector, for example, and detects the temperature T in the device at a predetermined location inside the device (preferably in the vicinity of the delay circuit unit 14) at a predetermined detection timing. The temperature information indicating the in-apparatus temperature T is output to the control unit 18.

  The data generation unit 16 is provided on one field programmable gate array (FPGA) capable of partial configuration, generates data of a predetermined pulse pattern set in advance as a predetermined number of parallel data, and a data multiplexing unit 17 is output.

  The data multiplexing unit 17 is composed of, for example, a multiplexer (MUX), a D-type flip-flop circuit, or the like, which multiplexes a plurality of input parallel data into serial data. Data is transmitted to the output destination in accordance with the timing of the reference clock signal.

  The control unit 18 includes a microcomputer such as a CPU, ROM, and RAM, and performs drive control of each unit constituting the data communication apparatus 1. As specific control contents, when the phase comparison information indicating the phase difference from the phase comparison unit 13 is input, the control unit 18 sets phase angle adjustment information for performing delay processing by phase angle adjustment according to the voltage value. It is output to the IQ modulator 12. Further, the control unit 18 outputs delay processing information for adjusting the skew of the parallel data input to the data multiplexing unit 17 to the delay circuit unit 14.

  Further, the control unit 18 cancels the error of the delay amount generated in the delay circuit unit 14 having temperature dependence due to the environmental temperature by adjusting the phase angle of the IQ modulation unit 12 and outputs the parallel data input by the data multiplexing unit 17. In order to adjust the skew, temperature information (temperature T in the apparatus) from the temperature detection unit 15, bit rate value B of serial data to be transmitted as apparatus operation information, preset reference temperature T1 and temperature characteristic coefficient α Thus, the phase angle adjustment information for temperature correction obtained by converting the delay shift amount [ps] resulting from the temperature change generated in the delay circuit unit 14 into the angle [°] is output to the IQ modulation unit 12.

  Note that the calculation timing of the temperature correction phase angle adjustment information is either a configuration that is performed every time the temperature detected by the temperature detection unit 15 changes by a predetermined temperature (for example, 1 ° C.) or a configuration that performs calculation processing at a predetermined timing. Good.

  Here, the phase angle adjustment control of the IQ modulation unit 12 based on the temperature information detected by the temperature detection unit 15 will be described. The control unit 18 includes a storage unit 18a formed of a semiconductor memory such as RON and RAM, for example, and calculates a preset reference temperature T1, temperature characteristic coefficient α, and temperature correction phase angle adjustment information. An arithmetic processing program and the like are stored.

  The reference temperature T1 is the temperature inside the apparatus that is a reference when correcting the delay deviation amount of the delay circuit section 14 caused by the change in the outside air temperature within the guaranteed operation temperature of the apparatus (that is, the temperature generated in the delay circuit section 14). In correcting the amount of delay deviation, the temperature in the apparatus at which the phase angle adjustment of the IQ modulator 12 is “0 °”). For example, when the operation guarantee temperature is 10 to 40 ° C., the temperature in the apparatus when driven at the intermediate temperature of 25 ° C. is set as the reference temperature T1.

  The temperature characteristic coefficient α is the “temperature information” detected by the temperature detection unit 15 when the outside air temperature of the device, which is the guaranteed operating temperature (10 to 40 ° C.) of the device, is 10 ° C., 25 ° C., or 40 ° C. In order to optimize the phase of the parallel data output from the data generator 16 at the temperature, the optimum value for changing the delay circuit 14 to the center of the two points where the error enters is expressed in HEX (hexadecimal system). “Center setting value (HEX)” which is a set value (1 change amount is 5 ps), “Center setting value (decimal)” which is a decimal value of this center setting value (HEX), and this center In the set value (decimal), when the outside air temperature is 25 ° C. and 0, the “deviation Tap number” indicating how much the optimum value of 10 ° C. and 40 ° C. deviates from the optimum value of 25 ° C., and this Deviation amount of deviation Tap number is p To the average value obtained from the converted "ps conversion value" is the delay deviation correction value of the delay circuit section 14 [ps] needed when the temperature changes 1 ° C..

  Note that the delay shift amount in the delay circuit unit 14 is such that the relationship between the temperature and the phase tends to transition linearly when driven within the guaranteed operating temperature, and therefore the in-device temperature T detected by the temperature detection unit 15. And the delay characteristic of the delay circuit unit 14 can be calculated from the temperature characteristic coefficient α.

  Next, the phase angle adjustment process of the IQ modulation unit 12 by the control unit 18 will be described.

When the temperature information detected by the temperature detection unit 15 is input, the control unit 18 adjusts how much the inclination of the IQ modulation unit 12 is adjusted, and the amount of delay deviation of the delay circuit unit 14 caused by the detected internal temperature T Is calculated according to the following calculation processing program stored in the storage unit 18a.
<Process 1>
First, by using the following equation 1, the difference temperature value obtained by subtracting the reference temperature T1 from the in-device temperature T detected by the temperature detection unit 15 and the temperature characteristic coefficient α are multiplied to obtain a delay shift amount S1 [ps] ] Is calculated.

Formula 1: S1 = (T−T1) × α
<Process 2>
Next, in order to convert the obtained delay shift amount S1 [ps] into mUI using the following equation 2, the bit rate value B of serial data to be transmitted, which is device operation information, is multiplied.

Formula 2: S2 = S1 × B
<Process 3>
Finally, using the following equation 3, the IQ modulation unit is obtained from the delay shift amount S2 [mUI] converted by the above equation 2 and the mUI converted value C obtained by converting 360 ° in the divided clock signal into mUI. 12 is converted into an angle A [°] for phase angle adjustment.

Formula 3: A = (S2 / C) × 360 °
Then, the angle information obtained from Equation 3 is output to the IQ modulator 12 as temperature correction phase angle adjustment information. Thereby, the IQ modulation unit 12 can adjust the phase angle of the divided clock signal in accordance with the input temperature correction phase angle adjustment information, and can cancel the delay shift amount of the delay circuit unit 14 caused by the temperature change.

  And in the data communication apparatus 1 of the said form, when the temperature information detected by the temperature detection part 15 is input into the control part 18, the bit rate value B of the serial data transmitted which is apparatus operation information, and a memory | storage part The temperature correction phase angle adjustment information of the IQ modulator 12 is calculated according to the arithmetic processing program stored in 18a. After the calculation, the control unit 18 outputs the temperature correction phase angle adjustment information for adjusting the phase angle of the IQ modulation unit 12 obtained according to the arithmetic processing program to the IQ modulation unit 12. Then, the IQ modulation unit 12 adjusts the delay amount by adjusting the phase angle of the divided clock signal according to the temperature correction phase adjustment information from the control unit 18, and the delay shift of the delay circuit unit 14 caused by the temperature change. By offsetting the amount, the skew of the parallel data input by the data multiplexing unit 17 is adjusted.

As described above, in this embodiment, the temperature information from the temperature detection unit 15 (device temperature T), the bit rate value B of serial data to be transmitted as device operation information, the preset reference temperature T1 and temperature From the characteristic coefficient α, an angle A for phase adjustment corresponding to the delay shift amount of the delay circuit unit 14 caused by a temperature change is calculated, and the IQ modulation unit is calculated using the calculated angle A as temperature correction phase angle adjustment information. 12 is output. Then, the IQ modulation unit 12 adjusts the phase angle according to the input temperature correction phase angle adjustment information, so that the data multiplexing unit 17 performs data correction without correcting the delay shift amount of the delay circuit unit 14. Skew alignment of parallel data received from the generation unit 16 can be performed.
[Reception form]
Next, the reception form of the data communication apparatus 1 according to the present invention will be described. This embodiment can be mounted as a data receiving unit of an error detector in an error rate measuring device, for example.

  In addition, about the structure contained in the transmission form mentioned above, the same code | symbol is attached | subjected and the description is abbreviate | omitted, and only the new structure requirement used as the characteristic of this form is demonstrated.

  As shown in FIG. 2, the reception mode in the data communication apparatus 1 of this example includes a frequency division unit 11, an IQ modulation unit 12, a phase comparison unit 13, a delay circuit unit 14, a temperature detection unit 15, A data separator 19, a data receiver 20, and a controller 18 are provided.

  The data receiving unit 20 is provided on one field programmable gate array (FPGA) capable of partial configuration, and delays parallel data output via each transmission lane connected to the data separating unit 19. The data is input in accordance with the clock signal from the circuit unit 14, and these data are output to the output destination.

  The data separation unit 19 is configured by a demultiplexer (DEMUX) that separates input serial data into parallel data, for example, and separates the input serial data so as to have the number of lanes connected to the data reception unit 20. To the data receiving unit 20.

  In addition, the control unit 18 corrects the delay amount error in the delay circuit unit 14 having temperature dependency depending on the environmental temperature, and the data receiving unit 20 receives the parallel data separated and output by the data separating unit 19. In order to adjust the skew, the temperature generated in the delay circuit unit 14 from the temperature information from the temperature detection unit 15, the bit rate value B of serial data to be received as device operation information, and a preset temperature characteristic coefficient α. The temperature correction phase angle adjustment information obtained by converting the amount of delay deviation caused by the change into the angle A is output to the IQ modulator 12.

  Note that the calculation process for acquiring the temperature correction phase angle adjustment information by the control unit 18 is the same as the calculation process in the transmission mode described above, and thus the description thereof is omitted.

  And in the data communication apparatus 1 of the said form, when the temperature information detected by the temperature detection part 15 is input, the control part 18 will receive the bit rate value B of the serial data to receive which is apparatus operation information, and a memory | storage part The temperature correction phase angle adjustment information of the IQ modulator 12 is calculated according to the arithmetic processing program stored in 18a. After the calculation, the control unit 18 outputs the temperature correction phase angle adjustment information for adjusting the phase angle of the IQ modulation unit 12 obtained according to the arithmetic processing program to the IQ modulation unit 12. Then, the IQ modulation unit 12 adjusts the delay amount by adjusting the phase angle of the divided clock signal according to the temperature correction phase adjustment information from the control unit 18, and the delay shift of the delay circuit unit 14 caused by the temperature change. By offsetting the amount, the skew of the parallel data input by the data receiving unit 20 is adjusted.

As described above, in this embodiment, the temperature information from the temperature detection unit 15 (device temperature T), the bit rate value B of serial data to be transmitted as device operation information, the preset reference temperature T1 and temperature From the characteristic coefficient α, a phase angle corresponding to the delay shift amount of the delay circuit unit 14 caused by a temperature change is calculated, and the calculated angle A is output to the IQ modulation unit 12 as temperature correction phase angle adjustment information. Then, the IQ modulation unit 12 adjusts the phase angle according to the input temperature correction phase angle adjustment information, so that the data reception unit 20 performs data separation without correcting the delay shift amount of the delay circuit unit 14. [Embodiment] It is possible to perform skew alignment of parallel data received from the unit 19 [Example]
Next, an example of processing operation when correcting the amount of delay deviation of the delay circuit unit 14 caused by a change in environmental temperature in the data communication device 1 of each embodiment described above will be described.

Here, as an example of adjusting the inclination of the IQ modulation unit 12, the reference clock signal is “16 GHz”, the frequency division ratio is “16”, the temperature characteristic coefficient α is “−6”, the reference temperature T1 is “58 ° C.”, and temperature detection is performed. When the apparatus internal temperature T detected by the unit 15 is “60 ° C.”, an example of inclination correction when the bit rate value B of serial data at the time of transmission or reception as the apparatus operation information is “30 Gbps”, “ An example of tilt correction at “10 Gbps” will be described.
(Example 1: Example of processing at 30 Gbps)
When the temperature information detected by the temperature detection unit 15 is input, the control unit 18 calculates the temperature correction phase angle adjustment information of the IQ modulation unit 12 according to the arithmetic processing program stored in the storage unit 18a. The IQ modulation unit 12 operates with a clock signal divided by 1/16, and 360 ° corresponds to 16000 [mUI].
<Process 1>
(60−58) × −6 = −12 [ps]
<Process 2>
−12 × 30 = −360 [mUI]
<Process 3>
(−360/16000) × 360 = −8.1 [°]
The control unit 18 outputs to the IQ modulation unit 12 temperature correction phase angle adjustment information for adjusting the phase angle of the IQ modulation unit 12 by the angle A “−8.1 °” obtained by the above processes. Then, the IQ modulation unit 12 adjusts the delay amount by adjusting the phase angle of the divided clock signal according to the temperature correction phase adjustment information from the control unit 18, and the delay shift of the delay circuit unit 14 caused by the temperature change. Offset the amount.
(Example 2: Processing example at 10 Gbps)
When the temperature information detected by the temperature detection unit 15 is input, the control unit 18 calculates the temperature correction phase angle adjustment information of the IQ modulation unit 12 according to the arithmetic processing program stored in the storage unit 18a. Further, the IQ modulation unit 12 operates with a clock signal divided by 1/16, and 360 ° corresponds to 16000 mUI.
<Process 1>
(60−58) × −6 = −12 [ps]
<Process 2>
−12 × 10 = −120 [mUI]
<Process 3>
(−120/16000) × 360 = −2.7 [°]
The control unit 18 outputs to the IQ modulation unit 12 temperature correction phase angle adjustment information for adjusting the phase angle of the IQ modulation unit 12 by the angle A “−2.7 °” obtained by the above processes. Then, the IQ modulation unit 12 adjusts the delay amount by adjusting the phase angle of the divided clock signal according to the temperature correction phase adjustment information from the control unit 18, and the delay shift of the delay circuit unit 14 caused by the temperature change. Offset the amount.

  As described above, the above-described data communication device 1 detects the in-device temperature T detected by the temperature detection unit 15 in order to correct the delay shift amount due to the temperature change of the delay circuit unit 14 having temperature dependence, The phase of the IQ modulator 12 is determined from the difference temperature value between the detected internal temperature T and the preset reference temperature T1, the bit rate value B of serial data to be transmitted or received, and the preset temperature characteristic coefficient α. Temperature correction phase angle adjustment information for adjusting the angle is calculated. Then, the calculated temperature correction phase angle adjustment information is output to the IQ modulation unit 12, and the phase angle of the divided clock signal is adjusted to cancel the amount of delay deviation of the delay circuit unit 14 caused by the temperature change. .

  Thereby, instead of the delay circuit unit 14 that is difficult to correct the delay shift amount caused by the temperature change, the delay shift amount of the delay circuit unit 14 is canceled by adjusting the phase angle of the IQ modulation unit 12, and the transmission form The parallel alignment of the parallel data output from the data generation unit 16 to the data multiplexing unit 17 and the parallel data output from the data separation unit 19 to the data reception unit 20 in the reception mode can be easily performed.

  In the above description, the functions of the apparatus are described separately as a transmission form and a reception form. However, an apparatus configuration having these functions may be used. That is, as shown in FIGS. 1 and 2, the data generating unit 16 and the data receiving unit 20 constitute a “data processing unit 21”, and the data multiplexing unit 17 and the data separating unit 19 are “data transmitting / receiving unit 22”. For example, data having both functions of a “signal transmission unit” that transmits a predetermined test signal to the device under test and a “signal reception unit” that receives a signal from the device under test in the error rate measurement apparatus. It can be installed as a communication device.

  In each of the above embodiments, the configuration example in which the reference clock signal is divided by 1 / N by the frequency divider 11 has been described. However, the present invention is not limited to this. For example, the reference clock signal is converted to the data multiplexing unit 17 or the data A configuration may be adopted in which a frequency-divided clock signal that is input to the separation unit 19 and previously divided by a predetermined frequency division ratio is input to the IQ modulation unit 12.

DESCRIPTION OF SYMBOLS 1 ... Data communication apparatus 11 ... Frequency division part 12 ... IQ modulation part 13 ... Phase comparison part 14 ... Delay circuit part 15 ... Temperature detection part 16 ... Data generation part 17 ... Data multiplexing part 18 ... Control part (18a ... Memory | storage part )
DESCRIPTION OF SYMBOLS 19 ... Data separation part 20 ... Data reception part 21 ... Data processing part 22 ... Data transmission / reception part

Claims (6)

A data processing unit (21) for generating and receiving predetermined parallel data according to the number of transmission lanes;
A data transmission / reception unit (22) for transmitting serial data obtained by multiplexing the parallel data from the data processing unit according to a reference clock signal and outputting the received serial data as parallel data separated into the number of transmission lanes; ,
An IQ modulation unit (12) for performing I / Q modulation on the divided clock signal obtained by dividing the reference clock signal by a predetermined division ratio, adjusting the angle to a predetermined phase angle, and outputting the result.
Multiple provided corresponding to the number of lanes of the transmission lanes, the line cormorants slow skew matching of the parallel data by the data processing unit on the basis of the divided clock signal after the angle adjustment output from the IQ modulator is corrected to output Extended circuit section (14);
A control unit (18) that performs phase angle adjustment control of the IQ modulation unit according to a phase difference between the divided clock signal before I / Q modulation by the IQ modulation unit and the divided clock signal after I / Q modulation. )When,
In a data communication device comprising:
A temperature detection unit (15) for outputting temperature information detected inside the apparatus as the apparatus internal temperature T;
The control unit includes a difference temperature value obtained by subtracting the device internal temperature T detected by the temperature detection unit and a preset reference temperature T1, a bit rate value B of the serial data, and an operation compensation temperature of the device. minimum temperature were set at an intermediate temperature, said temperature detecting portion in hexadecimal by changing the delay circuit section at a temperature of the center value of the two points that fall error of the temperature information detected respectively at the highest temperature in The first center setting value, the second center setting value that is a decimal value of the first center setting value, and the second temperature at the intermediate temperature and the second temperature at the maximum temperature. A temperature that becomes a delay deviation correction value of the delay circuit unit obtained from a deviation Tap number indicating a difference between center setting values and a ps converted value obtained by converting a deviation amount of the deviation Tap number into ps. A characteristic coefficient alpha, the mUI the converted value C of the 360 ° in terms mUI before Symbol divided clock signal, and calculates an angle A for correcting the delay deviation amount of the delay circuit, the angle based on the angle A data communication apparatus, characterized that you adjust the angle control of the divided clock signal according to the temperature correction phase angle adjustment information which is information output from the IQ modulator unit. A data generator (16) for generating and outputting predetermined parallel data corresponding to the number of transmission lanes;
The serial data said parallel data multiplexed from the data generator input via each transmission lane, data multiplexing unit for transmitting in accordance with the reference clock signal (17),
An IQ modulation unit (12) for performing I / Q modulation on the divided clock signal obtained by dividing the reference clock signal by a predetermined division ratio, adjusting the angle to a predetermined phase angle, and outputting the result.
Multiple provided corresponding to the number of lanes of the transmission lanes, the line cormorants slow skew matching of the parallel data output from the data generating unit based on the divided clock signal after the angle adjustment output from the IQ modulator portion Extended circuit section (14);
A control unit (18) that performs phase angle adjustment control of the IQ modulation unit according to a phase difference between the divided clock signal before I / Q modulation by the IQ modulation unit and the divided clock signal after I / Q modulation. )When,
In a data communication device comprising:
A temperature detection unit (15) for outputting temperature information detected inside the apparatus as the apparatus internal temperature T;
The control unit includes a difference temperature value obtained by subtracting the device internal temperature T detected by the temperature detection unit and a preset reference temperature T1, a bit rate value B of the serial data, and an operation compensation temperature of the device. minimum temperature were set at an intermediate temperature, said temperature detecting portion in hexadecimal by changing the delay circuit section at a temperature of the center value of the two points that fall error of the temperature information detected respectively at the highest temperature in The first center setting value, the second center setting value that is a decimal value of the first center setting value, and the second temperature at the intermediate temperature and the second temperature at the maximum temperature. A temperature that becomes a delay deviation correction value of the delay circuit unit obtained from a deviation Tap number indicating a difference between center setting values and a ps converted value obtained by converting a deviation amount of the deviation Tap number into ps. A characteristic coefficient alpha, the mUI the converted value C of the 360 ° in terms mUI before Symbol divided clock signal, and calculates an angle A for correcting the delay deviation amount of the delay circuit, the angle based on the angle A A data communication apparatus that performs angle adjustment control of the divided clock signal output from the IQ modulation unit in accordance with temperature correction phase angle adjustment information that is information. A data separator (19) for outputting parallel data obtained by separating received serial data into the number of transmission lanes according to a reference clock signal;
A data receiver (20) for inputting the parallel data from the data separator through the transmission lane;
An IQ modulation unit (12) for performing I / Q modulation on the divided clock signal obtained by dividing the reference clock signal by a predetermined division ratio, adjusting the angle to a predetermined phase angle, and outputting the result.
Wherein in response to the lane number of the transmission lanes provided in plurality, the row cormorants delay skew alignment parallel data by the data receiving unit is input based on the divided clock signal after the angle adjustment output from the IQ modulator portion A circuit section (14);
A control unit (18) that performs phase angle adjustment control of the IQ modulation unit according to a phase difference between the divided clock signal before I / Q modulation by the IQ modulation unit and the divided clock signal after I / Q modulation. )When,
In a data communication device comprising:
A temperature detection unit (15) for outputting temperature information detected inside the apparatus as the apparatus internal temperature T;
The control unit includes a difference temperature value obtained by subtracting the device internal temperature T detected by the temperature detection unit and a preset reference temperature T1, a bit rate value B of the serial data, and an operation compensation temperature of the device. minimum temperature were set at an intermediate temperature, said temperature detecting portion in hexadecimal by changing the delay circuit section at a temperature of the center value of the two points that fall error of the temperature information detected respectively at the highest temperature in The first center setting value, the second center setting value that is a decimal value of the first center setting value, and the second temperature at the intermediate temperature and the second temperature at the maximum temperature. A temperature that becomes a delay deviation correction value of the delay circuit unit obtained from a deviation Tap number indicating a difference between center setting values and a ps converted value obtained by converting a deviation amount of the deviation Tap number into ps. A characteristic coefficient alpha, the mUI the converted value C of the 360 ° in terms mUI before Symbol divided clock signal, and calculates an angle A for correcting the delay deviation amount of the delay circuit, the angle based on the angle A A data communication apparatus that performs angle adjustment control of the divided clock signal output from the IQ modulation unit in accordance with temperature correction phase angle adjustment information that is information. Generating and receiving predetermined parallel data according to the number of transmission lanes;
Transmitting serial data obtained by multiplexing the parallel data according to a reference clock signal, and outputting the received serial data as parallel data separated into the number of transmission lanes;
I / Q-modulating a frequency-divided clock signal obtained by frequency-dividing the reference clock signal by a predetermined frequency division ratio, adjusting the angle to a predetermined phase angle, and outputting the resultant signal;
Using the frequency- divided clock signal after angle adjustment , performing skew matching for each transmission lane at the time of input of the parallel data to be multiplexed and output of the parallel data obtained by separating the serial data;
Performing phase angle adjustment control according to a phase difference between the divided clock signal before I / Q modulation and the divided clock signal after I / Q modulation;
In a data communication method including:
Outputting temperature information detected in the apparatus as an apparatus internal temperature T;
The difference temperature value obtained by subtracting the internal temperature T from the preset reference temperature T1, the bit rate value B of the serial data, and the minimum, intermediate, and maximum temperatures of the device operation compensation temperature, respectively. detected first center set value and the first center settings delay circuit section Te temperature scent (14) by changing the setting the center value of 2 points entering errors hex the temperature information The difference Tap number indicating the difference between the second center setting value at the intermediate temperature and the second center setting value at the intermediate temperature and the difference Tap number indicating the difference between the second center setting value at the maximum temperature and the difference Tap a temperature characteristic coefficient α as a delay misalignment correction values of the delay circuit section obtained amount of deviation number from the ps converted value in terms of ps, the reference clock signal by a predetermined division ratio The 360 ° of the divided clock signal obtained by frequency from the mUI converted value C in terms mUI, calculates the angle A for correcting the delay deviation amount of the delay circuit, temperature compensation is the angle information based on the angle A Adjusting the angle of the divided clock signal before the I / Q modulation according to the phase angle adjustment information for use ;
A data communication method comprising: Generating and outputting predetermined parallel data according to the number of transmission lanes;
Transmitting serial data obtained by multiplexing the parallel data input via the transmission lane according to a reference clock signal;
I / Q-modulating a frequency-divided clock signal obtained by frequency-dividing the reference clock signal by a predetermined frequency division ratio, adjusting the angle to a predetermined phase angle, and outputting the resultant signal;
Performing skew alignment of the multiplexed parallel data for each transmission lane using the divided clock signal after angle adjustment ;
Performing phase angle adjustment control according to a phase difference between the divided clock signal before I / Q modulation and the divided clock signal after I / Q modulation;
In a data communication method including:
Outputting temperature information detected in the apparatus as an apparatus internal temperature T;
The difference temperature value obtained by subtracting the internal temperature T from the preset reference temperature T1, the bit rate value B of the serial data, and the minimum, intermediate, and maximum temperatures of the device operation compensation temperature, respectively. detected first center set value and the first center settings delay circuit section Te temperature scent (14) by changing the setting the center value of 2 points entering errors hex the temperature information The difference Tap number indicating the difference between the second center setting value at the intermediate temperature and the second center setting value at the intermediate temperature and the difference Tap number indicating the difference between the second center setting value at the maximum temperature and the difference Tap a temperature characteristic coefficient α as a delay deviation correction value of the delay circuit section obtained amount of deviation number from the ps converted value in terms of ps, the reference clock signal by a predetermined division ratio The 360 ° of the divided clock signal obtained by frequency from the mUI converted value C in terms mUI, calculates the angle A for correcting the delay deviation amount of the delay circuit, temperature compensation is the angle information based on the angle A Adjusting the angle of the divided clock signal before the I / Q modulation according to the phase angle adjustment information for use ;
A data communication method comprising: Outputting parallel data obtained by separating the received serial data into the number of transmission lanes according to the reference clock signal;
Inputting the parallel data via the transmission lane;
I / Q-modulating a frequency-divided clock signal obtained by frequency-dividing the reference clock signal by a predetermined frequency division ratio, adjusting the angle to a predetermined phase angle, and outputting the resultant signal;
Performing skew alignment of the input parallel data for each transmission lane using the divided clock signal after angle adjustment ;
Performing phase angle adjustment control according to a phase difference between the divided clock signal before I / Q modulation and the divided clock signal after I / Q modulation;
In a data communication method including:
Outputting temperature information detected in the apparatus as an apparatus internal temperature T;
The difference temperature value obtained by subtracting the internal temperature T from the preset reference temperature T1, the bit rate value B of the serial data, and the minimum, intermediate, and maximum temperatures of the device operation compensation temperature, respectively. detected first center set value and the first center settings delay circuit section Te temperature scent (14) by changing the setting the center value of 2 points entering errors hex the temperature information The difference Tap number indicating the difference between the second center setting value at the intermediate temperature and the second center setting value at the intermediate temperature and the difference Tap number indicating the difference between the second center setting value at the maximum temperature and the difference Tap a temperature characteristic coefficient α as a delay misalignment correction values of the delay circuit section obtained amount of deviation number from the ps converted value in terms of ps, the reference clock signal by a predetermined division ratio The 360 ° of the divided clock signal obtained by frequency from the mUI converted value C in terms mUI, calculates the angle A for correcting the delay deviation amount of the delay circuit, temperature compensation is the angle information based on the angle A Adjusting the angle of the divided clock signal before the I / Q modulation according to the phase angle adjustment information for use ;
A data communication method comprising:

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