CN104734693B - The method and system of the three end drivers for modulator device - Google Patents
The method and system of the three end drivers for modulator device Download PDFInfo
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- CN104734693B CN104734693B CN201410729247.7A CN201410729247A CN104734693B CN 104734693 B CN104734693 B CN 104734693B CN 201410729247 A CN201410729247 A CN 201410729247A CN 104734693 B CN104734693 B CN 104734693B
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Abstract
The present invention relates to the method and systems of the three end drivers for modulator device.A kind of light modulator devices using three end driver interfaces.Modulator device may include drive circuit, three transmission lines, a pair of diodes and diode termination resistor.The equipment can have the diode termination resistor for being coupled to first and third transmission line.Three transmission lines may be coupled to two diodes.First diode may be coupled to the first and second transmission lines and the second diode may be coupled to second and third transmission line.Relatively low impedance, the level for being decreased to not make the waveform at any diode to degenerate in electric current are presented with respect to asymmetrical current for second transmission line road.The high-frequency low impedance parallel of impedance and the symmetrical components interaction synthesis by differential driving and diode load occurs.The configuration leads to quick, the good transient response of control.
Description
Technical field
The present invention relates to communication systems and integrated circuit (IC) equipment.It is driven more specifically, the present invention is provided using three ends
The light modulator devices of device interface.
Background technique
In traditional light modulator devices, due to non-linear, the impedance of two diodes will be in conducting and off-state
It is different between (for example, data are high or low).It is expected only to illuminate a diode using optical power in many cases,.These
Situation, which presents, causes the electric current in two diodes to become unbalanced asymmetric, this is asymmetric to make modulated signal degenerate simultaneously
Generate the waveform of distortion.
Summary of the invention
The present invention provides a kind of light modulator devices comprising: drive circuit has the first output end, second defeated
Outlet and third output end；First transmission line road is electrically coupled to the first output end of drive circuit, first transmission line road
It is characterized in that the first impedance value；Second transmission line road is electrically coupled to the second output terminal of drive circuit, second transmission line road
It is characterized in that the second impedance value；Third transmission line is electrically coupled to the third output end of drive circuit, third transmission line
It is characterized in that third impedance value；First diode is coupled to first transmission line road and second transmission line road；And the two or two pole
Pipe, is coupled to second transmission line road and third transmission line.
Further, which includes being coupled to the diode end on first transmission line road and third transmission line
Termination resistor, wherein diode termination resistor is configured as not influencing the configuration of first diode and the second diode
In the case of reduce signal reflex.
Further, drive circuit includes difference (differential) low-voltage driver electricity for being coupled to internal Vdd
Road.
Further, drive circuit includes pre-driver circuit, high-speed driver circuit and bias generator electricity
Road.
Further, high-speed driver circuit includes the first output end and second output terminal, and wherein, bias generator
Circuit includes third output end；Wherein, first transmission line road and third transmission line are configured as data circuit；And wherein,
Second transmission line road is configured as biasing circuit.
Further, first diode and the second diode are reversely biased.
Further, first diode and the second diode are configured as electrooptic modulator (EOM) or electro-absorption modulation
Device (EAM).
Further, light modulator devices are configured as wherein only first diode and provide the non-right of the output data modulated
Claim light modulator devices.
Further, the second diode is virtual unit or capacitor.
Further, bias generator circuit is configured as output waveform shaping (wave shaping) pulse.
Further, light modulator devices are configured as wherein first diode and the second diode all provides the defeated of modulation
The symmetrical light modulator devices of data out.
Further, the first impedance is identical as third impedance.
It is according to the present invention it is another embodiment there is provided it is a kind of configuration on single integrated circuit (IC) chipset
System comprising: drive circuit has the first data output end, the second data output end and bias output, wherein drives
Dynamic device circuit includes the difference low-voltage driver circuit for being coupled to internal Vdd；First transmission line road, is electrically coupled to drive circuit
The first data output end, first transmission line road is characterized in that data circuit impedance value；Second transmission line road is electrically coupled to drive
The bias output of dynamic device circuit, second transmission line road is characterized in that biasing circuit impedance value；Third transmission line, electric coupling
To the second data output end of drive circuit, third transmission line is characterized in that data circuit impedance value；First modulator
Diode, has first anode terminal and the first cathode terminal, and first anode terminal is coupled to first transmission line road and first
Cathode terminal is coupled to second transmission line road；And the second modulator diode, there is second plate terminal and the second cathode terminal
Son, second plate terminal is coupled to third transmission line and the second cathode terminal is coupled to second transmission line road.
Further, which includes the diode terminating resistor for being coupled to first transmission line road and third transmission line
Device, wherein diode termination resistor is configured as in the case where not influencing the configuration of first diode and the second diode
Reduce signal reflex.
Further, drive circuit includes pre-driver circuit, high-speed driver circuit and bias generator electricity
Road；Wherein, high-speed driver circuit includes the first data output end and the second data output end, and wherein bias generator is electric
Road includes bias output；Wherein, first transmission line road and third transmission line configuration are as data circuit；And wherein,
Two transmission lines are configured as biasing circuit；Wherein, first diode and the second diode are configured as electrooptic modulator (EOM)
Or electroabsorption modulator (EAM).
Detailed description of the invention
Fig. 1 is the simplified block diagram for showing the light modulator devices of embodiment according to the present invention.
Fig. 2 is the simplified electrical circuit diagram for showing the light modulator devices of embodiment according to the present invention.
Fig. 3 is the simplified block diagram for showing the symmetrical light modulator devices of embodiment according to the present invention.
Fig. 4 is the simplified block diagram for showing the asymmetrical beam modulator device of embodiment according to the present invention.
Fig. 5 is the simplification frame for showing the symmetrical light modulator devices using virtual unit of embodiment according to the present invention
Figure.
Fig. 6 is the simplification for showing the asymmetrical beam modulator using waveform shaping pulse of embodiment according to the present invention
Block diagram.
Fig. 7 A to Fig. 7 D is the equipment and signal characteristic for the light modulator devices for showing embodiment according to the present invention
Simplify curve graph.
Fig. 8 A to Fig. 8 D is the equipment and signal characteristic for the light modulator devices for showing embodiment according to the present invention
Simplify curve graph.
Fig. 9 A to Fig. 9 D is the equipment and signal characteristic for the light modulator devices for showing embodiment according to the present invention
Simplify curve graph.
Specific embodiment
The present invention relates to communication systems and integrated circuit (IC) equipment.More specifically, the present invention provides use three ends to drive
The light modulator devices of dynamic device interface.In embodiments, as described below, the present invention provides connect using the three ends driver
The light modulator devices of mouth.Modulator device may include drive circuit, three transmission lines, a pair of diodes and two poles
Pipe end termination resistor (diode termination resistor).The equipment, which can have, is coupled to first and third transmission line
Diode termination resistor.
Drive circuit may include the difference low-voltage driver circuit that may be coupled to internal Vdd, power supply etc..In embodiment
In, drive circuit can have be expressed as P, R and N first, second and third output end.First output end P coupling
To first transmission line road, it is characterised in that the first impedance.Second output terminal R is coupled to second transmission line road, it is characterised in that the
Two impedances.Third output end N is coupled to third transmission line, it is characterised in that third impedance.These output ends P, R and N can also
Representation signal transmission.
The differential nature of driver allows to generate the ability of powerful driving current, is driver, transmission line and two poles
Better signal integrity (integrity) in pipe load provides balance.Two differential data output ends P and N are coupled to
First and third transmission line.Termination resistor can be configured in the case where not influencing the configuration of the first and second diodes
Reduce signal reflex.
In a specific embodiment, can be pre can data circuit impedance identical with third impedance for the first impedance.?
In Fig. 1, these impedances are expressed as Zo.Second impedance can be pre bias (bias) line impedance for being expressed as Zr.Various
In embodiment, the impedance of these transmission lines can be configured as symmetrical or asymmetric according to application.
Three transmission lines may be coupled to two diodes.First diode may be coupled to the first and second transmission lines simultaneously
And second diode may be coupled to second and third transmission line.In a specific embodiment, first diode can have coupling
To first transmission line road first anode terminal and be coupled to first cathode terminal on second transmission line road.Second diode can have
There is the second plate terminal for being coupled to third transmission line and is coupled to the cathode terminal on second transmission line road.These diodes can
To be configured as the reverse biased modulator diode of electrooptic modulator (EOM) or electroabsorption modulator (EAM) etc..
Due to non-linear, the impedance of two diodes will be between conducting and off-state (for example, data are high or low)
It is different.It is expected only to illuminate a diode using optical power in many cases,.These situations, which present, causes two diodes
In electric current become unbalanced asymmetric, the asymmetric waveform that modulated signal may be made to deteriorate and generate distortion.
Embodiments of the present invention are by introducing additional transmitted route (second transmission line road) and driver output end R (its
Generate bias simultaneously present matching activation transmission line impedance broadband impedance) solve this problem.Additional transmitted route,
Or bias transmission line relative to asymmetrical current is presented relatively low impedance (electric current is decreased to not make in any two pole by it
The level that waveform at pipe is degenerated).Impedance is with the symmetrical components by differential driving and diode load (for example, parasitic electricity
Hold) interact the low Z of high-frequency (impedance) synthesized appearance parallel.The configuration leads to the quick, good (well- of control
Controlled) transient response.
Various embodiments through the invention recognize many benefits.This benefit includes having or not effective modulation
The ability of the optical signal of balanced load.The faster driving that the embodiment of the configuration also allows to have lower breakdown voltage is brilliant
Body pipe directly applies data-signal, while can generate necessary DC bias by slow, higher voltage transistor.Driver
Quickly low V can be used in the embodiment of circuit and slow high V device is all integrated into nano-scale CMOS technique so that this
A little advantages maximize.Driver can also be coupled directly to the modulator on photon IC, be not necessarily to other than pattern metal route outer
Portion's passive component.It will recognize that other benefits, described mechanism can also be applied to by those skilled in the art
Other communication systems.
In embodiments, the present invention be provided arranged to allow low-voltage driver directly drive with apply high pressure it is inclined
The electrooptic modulator of the light modulator devices of pressure.This configuration can provide signal driving operation, without bandwidth or the letter of trading off
Number integrality and without external capacitor or inductor.Low-voltage driver can apply independently of DC bias (its usual height
In voltage data signal) the modulator diode across light modulator devices high-speed data signal.
Fig. 1 is the simplified block diagram for showing the light modulator devices of embodiment according to the present invention.As indicated, equipment 100
Including drive circuit 110, three transmission line 121-123, a pair of diodes 131-132 and diode termination resistor
140.Equipment 100 can have the diode termination resistor 140 for being coupled to first and third transmission line 121,123.This field
Skilled artisan will realize that variation, modification and replacement.
Drive circuit 100 may include the difference low-voltage driver circuit that may be coupled to internal Vdd, power supply etc..Implementing
In mode, drive circuit can have be expressed as P, R and N first, second and third output end.First output end P
It is coupled to first transmission line road 121, it is characterised in that the first impedance.Second output terminal R is coupled to second transmission line road 122,
It is characterized in that the second impedance.Third output end N is coupled to third transmission line 123, it is characterised in that third impedance.These outputs
Hold P, R and N can also representation signal transmission.
The difference essence of driver allows to generate the ability of powerful driving current, this is driver, transmission line and two
Better signal integrity in pole pipe load provides balance.Two differential data output ends P and N are coupled to first and third
Transmission line 121,123.Termination resistor 140 can be configured in the configuration for not influencing the first and second diodes 131,132
In the case where reduce signal reflex.Resistor 140 is expressed as RL in Fig. 1.
In a specific embodiment, can be pre can data circuit impedance identical with third impedance for the first impedance.?
In Fig. 1, these impedances are expressed as Zo.Second impedance can be pre the biasing circuit impedance for being expressed as Zr.In various embodiment party
In formula, the impedance of these transmission lines 121-123 can be symmetrical or asymmetric according to application configuration.First, second and
Three transmission lines.
Three transmission line 121-123 may be coupled to two diodes 131 to 132.First diode 131 may be coupled to
One and second transmission line road and the second diode 132 may be coupled to second and third transmission line.In a specific embodiment,
First diode 131 can have the first anode terminal for being coupled to first transmission line road 121 and be coupled to second transmission line road 122
The first cathode terminal.Second diode 132 can have the second plate terminal for being coupled to third transmission line 123 and be coupled to
The cathode terminal on second transmission line road 122.These diodes 131,132 can be configured as electrooptic modulator (EOM) or
The reverse biased modulator diode of electroabsorption modulator (EAM) etc..
Due to non-linear, the impedance of two diodes will be between conducting and off-state (for example, data are high or low)
It is different.It is expected only to illuminate a diode using optical power in many cases,.These situations, which present, leads to two diodes
In electric current become unbalanced asymmetric, this asymmetric waveform for making modulated signal degenerate and to generate distortion.
Embodiments of the present invention are by introducing additional transmitted route (second transmission line road 122) and driver output end R
(it generates bias and broadband impedance is presented to match the impedance of the transmission line of activation) (as shown in Figure 1) asks to solve this
Topic.Electric current relative to being decreased to not make the light at any diode by additional transmission line or bias transmission line 122
Relatively low impedance is presented in the horizontal asymmetrical current of waveform degradation.Impedance and pair for passing through differential driving and diode load
The low Z of high-frequency (impedance) that (for example, parasitic capacitance) interaction synthesizes that weighs occurs parallel.The configuration leads to quick, control
Make good transient response.
The configuration also allows the faster driving transistor for the breakdown voltage for having low directly to apply data-signal, simultaneously
Necessary DC bias can be generated by slow, higher voltage transistor.In a specific embodiment, high voltage power supply R must be only
Wideband impedance match is generated, compared with generating broadband signal, generation wideband impedance match is easier task.The driver can
Using quick low V and slow high V device is all integrated into nano-scale CMOS technique so that these advantages maximize.The drive
Dynamic device can also be coupled directly to the modulator on photon IC, and external passive components are not necessarily to other than pattern metal route.This
Field skilled artisan will realize that these configuration other benefits.
3 lines (3-wire) that Fig. 1 is shown including driver and between driver and a pair of of modulator diode pass
A kind of implementation of the circuit arrangement of defeated line interface.Driver 110 can excite (excite) 3 line transmission line interface in Fig. 1
Shown in corresponding voltage Vd1, Vd2 and Vr are generated at diode terminal.The generated signal across diode be across
The RF data-signal Vd-Vr of each diode, and reverse biased D/C voltage is equal to the average value that Vr is subtracted from the average value of Vd
(average value (Vd)-average value (Vr)).
The other embodiments of the end 3- configuration are described in the following figure.About the other details of each element and the example of operation
It can be found in the following figure and relevant description.
Fig. 2 is the simplified electrical circuit diagram for showing the light modulator devices of embodiment according to the present invention.As indicated, equipment
200 include 210, three transmission line 221-223 of drive circuit, a pair of diodes 231 to 232 and diode termination electricity
Hinder device 240.Equipment 200 can have the diode termination resistor 240 for being coupled to first and third transmission line 221,223.This
Field is skilled artisan will realize that variation, modification and replacement.
It is similar to the embodiment of Fig. 1, drive circuit 200 may include may be coupled to internal Vdd, power supply etc. difference it is low
Press drive circuit.In embodiments, drive circuit can have be expressed as P, R and N first, second and third
Output end.First output end P is coupled to first transmission line road 221, and first transmission line road 221 is characterized in that the first impedance.The
Two output end R are coupled to second transmission line road 222, and second transmission line road 222 is characterized in that the second impedance.Third output end N
It is coupled to third transmission line 223, third transmission line 223 is characterized in that third impedance.These output ends P, R and N can also
Representation signal transmission.
In a specific embodiment, driver 200 may include pre-driver circuit 211,212 and of high-speed driver circuit
Bias generator 213.Pre-driver 211 is shown as being coupled to the input terminal of high-speed driver circuit 212, high-speed driver electricity
Road 212 is coupled to internal Vdd by transistor RT.High-speed driver is shown with two transistors for being coupled to current source Id
Simplified symmetrical configuration, output end P and N are respectively coupled to first and third transmission line 221,223.
Bias generator 213 is shown as being configured to supply the matched impedance of impedance Z o or Zr with transmission line
(Z) DC bias generator.The more detailed functional diagram of DC bias generator is shown on the right side of drive circuit 210.?
Inside functional diagram, bias generator is shown as configuring the voltage source of (specifically, RC filter configures) with divider.It can root
Other circuit configurations are used according to concrete application.
The differential nature of driver allows to generate the ability of powerful driving current, which is driver, transmission line
Balance is provided with the better signal integrity on diode load.Two differential data output ends P and N are coupled to first and
Three transmission lines 221,223.Termination resistor 240 can be configured to do not influencing matching for the first and second diodes 231,232
Reduce signal reflex in the case where setting.Resistor 240 is expressed as RL in Fig. 2.
In a specific embodiment, can be pre can data circuit impedance identical with third impedance for the first impedance.?
In Fig. 2, these impedances are expressed as Zo.Second impedance can be pre the biasing circuit impedance for being expressed as Zr.In various embodiment party
In formula, the impedance of these transmission lines 221 to 223 can be configured as symmetrical or asymmetric according to application.The first, second,
With third transmission line.
Three transmission lines 221 to 223 may be coupled to two diodes 231 to 232.First diode 231 may be coupled to
First and second transmission lines and the second diode 232 may be coupled to second and third transmission line.In specific embodiment
In, first diode 231 can have the first anode terminal for being coupled to first transmission line road 221 and be coupled to second transmission line road
222 the first cathode terminal.Second diode 232 can have the second plate terminal and coupling for being coupled to third transmission line 223
It is connected to second cathode terminal on second transmission line road 222.These diodes 231,232 can be configured as electrooptic modulator
(EOM) or the reverse biased modulator diode of electroabsorption modulator (EAM) etc..
Fig. 3 is the simplified block diagram for showing the symmetrical light modulator devices of embodiment according to the present invention.As indicated, equipment
300 include 310, three transmission lines 321 to 323 of drive circuit, a pair of diodes 331 to 332 and diode termination electricity
Hinder device 340.Equipment 300 can have the diode termination resistor 340 for being coupled to first and third transmission line 321,323.It can
The detailed description of modulator device 300 is found in the explanation of description similar component and Fig. 1 and Fig. 2 of configuration.
As previously described, three end modulator devices can be configured to symmetrical and asymmetrical configuration.In Fig. 3, light tune
Device equipment processed is configured as symmetry operation.Data-signal (Data, Data#) from P and N output end (being all difference output end)
It is modulated by the first and second diodes 331,332.Signal path is by passing through light input end to light output via three end interfaces
Dual (dual) signal (Data, Data#) at end shows.As shown in figure 3, the result is that with (Data's) and modulation modulated
Both (Data#).
Fig. 4 is the simplified block diagram for showing the asymmetrical beam modulator device of embodiment according to the present invention.As indicated, setting
Standby 400 include drive circuit 410, three transmission line 421-423, a pair of diodes 431-432 and diode termination electricity
Hinder device 440.Equipment 400 can have the diode termination resistor 440 for being coupled to first and third transmission line 421,423.It can
The detailed description of modulator device 400 is found in the explanation of description similar component and Fig. 1 and Fig. 2 of configuration.
Compared with Fig. 3, Fig. 4 describes asymmetrical modulator configuration.In this case, the second diode 432 keeps un-activation
(be shown as " it is not illuminated '), the light input for being simultaneously from the P output end of drive circuit 410 is modulated.Such as prior statement,
It is expected that only illuminating a diode using optical power.These situations, which present, causes the electric current in two diodes to become uneven
Asymmetric, this asymmetric waveform for making modulated signal degenerate and to generate distortion.
The introducing of additional transmission line (second transmission line road 422) and driver output end R (as shown in Figure 4) passes through production
Simultaneously the broadband impedance for the impedance of transmission line for matching activation is presented to mitigate signal degradation in raw bias.Additional transmission line,
Or relatively low impedance is presented with respect to asymmetrical current for bias transmission line 322, electric current, which is reduced to, not to be made any two
The level that waveform at pole pipe is degenerated.Impedance is with the symmetrical components by differential driving and diode load (for example, parasitic electricity
Hold) interact the low Z of high-frequency (impedance) synthesized appearance parallel.As shown in figure 4, the configuration causes, quick, control is good
Transient response.
Fig. 5 is the simplification frame for showing the symmetrical light modulator devices using virtual unit of embodiment according to the present invention
Figure.As indicated, equipment 500 include drive circuit 510, three transmission line 521-523, a pair of diodes 531-532 and
Diode termination resistor 540.Equipment 500 can have the diode termination for being coupled to first and third transmission line 521,523
Resistor 540.Modulator device 500 can be found specifically in the explanation of description similar component and Fig. 1 and Fig. 2 of configuration
It is bright.
Compared with Fig. 4, Fig. 5 depicts the modulator that wherein the second diode 532 is replaced by virtual unit and configures.This is virtual
Equipment can be capacitor or other similar structure.In this case, the parasitism electricity of virtual unit matching first diode 531
Hold, the light input for being simultaneously from the P output end of drive circuit 410 is modulated.The equipment 500 of Fig. 5 shows asymmetric modulation
The alternative configuration of device.
Fig. 6 is the simplification for showing the asymmetrical beam modulator using waveform shaping pulse of embodiment according to the present invention
Block diagram.As indicated, equipment 600 include 610, three transmission line 621-623 of drive circuit, a pair of diodes 631-632, with
And diode termination resistor 640.Equipment 600 can have the diode end for being coupled to first and third transmission line 621,623
Termination resistor 640.Modulator device 600 can be found specifically in the explanation of description similar component and Fig. 1 and Fig. 2 of configuration
It is bright.
Compared with Fig. 3 and Fig. 4, the equipment 600 of Fig. 6 has similar configuration, but includes from drive circuit 610
The output of the waveform shaping pulse of R output end.In a specific embodiment, (such as pass through raising using waveform shaping pulse
Its waveform symmetry) improve the signal integrity of the modulated signal for being applied to diode.Such as prior statement, additional transmission
Relatively low impedance is presented with respect to asymmetrical current for route or bias transmission line 322, electric current is decreased to not make in office
The level that waveform at one diode is degenerated.
The configuration, which depicts, causes another asymmetrical modulator characterized by quick, the good transient response of control to be matched
It sets.It will be appreciated by those of ordinary skill in the art that other variations, modification and replacement.In order to illustrate the benefit of these embodiments
Place, by the curve graph of comparison voltage characteristic and electric eye figure in the following figure.
Fig. 7 A to Fig. 7 D is the equipment and signal for showing the light modulator devices configured with perfect symmetrical diode load
The curve graph of the simplification of feature.Curve graph 701 depict the first and second modulator diodes (with the diode 331 of Fig. 3 and
332 is similar) at the time measurement voltage (Vd1, Vd2/ns) example.Vd1 and Vd2 signal is shown as difference wave
Shape, it is consistent with these nodes of difference output end for being connected to drive circuit.
The generated signal across diode is the RF data-signal Vd-Vr across each diode, and reversed inclined
Pressure D/C voltage is equal to the average value (average value (Vd)-average value (Vr)) that Vr is subtracted from the average value of Vd.Curve graph 703 depicts
At diode cathode with the time voltage characteristic (Vr/ns) example.In this example, the voltage at node Vr starts
In about 4.275V and decreases up to it between about 4.251V and about 4.267V and fluctuate.
Curve graph 702 and 704 respectively illustrate at the tie point (junction) of diode 1 and 2 with the time
(ps) electric eye figure.As shown, the two curve graphs show the good transient response of control.In the case where this is symmetrical,
Waveform is stable, and has the smallest noise or degeneration.
Fig. 8 A to Fig. 8 D is the equipment for showing the light modulator devices configured with asymmetrical beam illumination and the letter of signal characteristic
The curve graph of change.Curve graph 801 depict at the first and second modulator diodes with the time measurement voltage (Vd1,
Vd2/ns example).Similar to curve graph 701, Vd1 and Vd2 signal is shown as difference waveform herein, drives with being connected to
These nodes of the difference output end of device circuit are consistent.
Here, the Vr node between the first and second diodes shows high and/or uncontrolled impedance.Curve graph
803 show the voltage at diode cathode (Vr), and it illustrates the voltage fluctuated between about 4.14V and about 4.43V electricity
It is flat.The fluctuating range is much larger than the symmetric case of curve graph 703.
For asymmetric case, curve graph 802 and 804 respectively illustrate at the tie point of diode 1 and 2 with when
Between (ps) electric eye figure.As shown, the two curve graphs show degeneration and uncontrolled transient response.With curve graph
702 compare with 704, these waveforms are inconsistent, show a large amount of changeability.Under the asymmetric case, light modulation waveform by
The serious degeneration as caused by load asymmetry.
As previously described, these problems are since the impedance of two of them diode will be in conducting and off-state (example
Such as, data are high or low) between it is different it is non-linear caused by.It is expected only to illuminate using optical power in many cases,
One diode.These situations, which present, causes the electric current in two diodes to become unbalanced asymmetric, such as Fig. 8 B to 8D
Shown in, this asymmetric waveform for making modulated signal degenerate and to generate distortion.
Fig. 9 A to Fig. 9 D is shown configured with asymmetric optical illumination and using the optical modulator of three ends configuration of the invention
The equipment of equipment and the simplification curve graph of signal characteristic.Curve graph 801 depicts at the first and second modulator diodes
With the example of the voltage (Vd1, Vd2/ns) of time measurement.It is similar to curve graph 701 and 801, Vd1 and Vd2 signal herein by
It is shown as difference waveform, it is consistent with these nodes of difference output end for being connected to drive circuit.
Here, low and/or controlled impedance is presented in the Vr node between the first and second diodes.Curve graph 803
The voltage at diode cathode (Vr) is shown, it illustrates the voltage fluctuated between about 4.278V and about 4.318V electricity
It is flat.The fluctuating range is more much lower than the asymmetrical situation of curve graph 803 and is more nearly the fluctuating range of curve graph 703.
For asymmetric case, curve graph 902 and 904 respectively illustrate at the tie point of diode 1 and 2 with when
Between (ps) electric eye figure.As shown, the two curve graphs present the good transient response of control.With curve graph 802 and 804
It compares, these waveforms are more clean and improved, similar to curve graph 702 and 704.Under the asymmetric case, pass through
The light modulation wave due to caused by load asymmetry is alleviated using three end interfaces of the biasing circuit of the impedance of matched data route
The degeneration of shape.
These curve graphs, which present, to be passed through introducing generation bias and the broadband for matching the impedance of transmission line of activation is presented
The additional transmitted route (biasing circuit) and driver output end R (as shown in Figure 1) of impedance solves the problems, such as the of the invention of this
Embodiment.Relatively low impedance is presented with respect to asymmetrical current for additional transmission line or bias transmission line, will be electric
The level that stream is decreased to not make the waveform at any diode to degenerate.Impedance with pass through differential driving and diode load
The low Z of high-frequency (impedance) of symmetrical components (for example, parasitic capacitance) interaction synthesis occurs parallel.The configuration causes quickly
, the good transient response of control.
The benefit of signal modulation can be clearly seen in the present invention from these examples.In addition, these embodiments are also divided
Do not apply data-signal directly using the faster driving transistor with low breakdown voltage, while can be by slow, higher
Voltage transistor generate necessary DC bias.The embodiment of these drive circuits of these modulator devices can be used fast
The low V of speed and slow high V device are all integrated into nano-scale CMOS technique so that the maximization of these advantages.These drivers
Circuit can also be coupled directly to the modulator on photon IC, and external passive components are not necessarily to other than patterned metallic circuit.
It will be appreciated by those of ordinary skill in the art that other benefits of these configurations.
Although being whole descriptions of specific embodiment above, various modifications, alternative constructions and equivalent can be used.Cause
This, above description and diagram should not be considered as limiting the scope of the present invention being defined by the following claims.
Claims (15)
1. a kind of light modulator devices, comprising:
Drive circuit has the first output end, second output terminal and third output end；
First transmission line road is electrically coupled to first output end of the drive circuit, the spy on the first transmission line road
Sign is the first impedance value；
Second transmission line road is electrically coupled to the second output terminal of the drive circuit, the spy on the second transmission line road
Sign is the second impedance value；
Third transmission line is electrically coupled to the third output end of the drive circuit, the spy of the third transmission line
Sign is third impedance value；
First diode, has first anode terminal and the first cathode terminal, and the first anode terminal is coupled to described first
Transmission line and first cathode terminal are coupled to the second transmission line road；And
Second diode, has second plate terminal and the second cathode terminal, and second cathode terminal is coupled to described second
Transmission line and the second plate terminal are coupled to the third transmission line.
2. equipment according to claim 1 further comprises being coupled to the first transmission line road and third transmission
The diode termination resistor of route, wherein the diode termination resistor is configured as not influencing the one or two pole
Reduce signal reflex in the case where the configuration of pipe and second diode.
3. equipment according to claim 1, wherein the drive circuit includes the difference low pressure for being coupled to internal Vdd
Drive circuit.
4. equipment according to claim 1, wherein the drive circuit includes pre-driver circuit, high-speed driver
Circuit and bias generator circuit.
5. equipment according to claim 4, wherein the high-speed driver circuit includes first output end and described
Third output end, and wherein, the bias generator circuit includes the second output terminal；
Wherein, the first transmission line road and the third transmission line are configured as data circuit；And
Wherein, the second transmission line road is configured as biasing circuit.
6. equipment according to claim 1, wherein the first diode and second diode are reversely biased.
7. equipment according to claim 1, wherein the first diode and second diode are configured as electric light
Modulator (EOM) or electroabsorption modulator (EAM).
8. equipment according to claim 1, wherein the light modulator devices are configured as the only first diode and mention
For the asymmetrical beam modulator device of the output data of modulation.
9. equipment according to claim 8, wherein second diode is virtual unit or capacitor.
10. equipment according to claim 4, wherein the bias generator circuit is configured as output waveform shaping arteries and veins
Punching.
11. equipment according to claim 1, wherein the light modulator devices be configured as the first diode and
Second diode all provides the symmetrical light modulator devices of modulation output data.
12. equipment according to claim 1, wherein first impedance is identical as the third impedance.
13. a kind of system of configuration on single integrated circuit (IC) chipset, the system comprises:
Drive circuit has the first data output end, the second data output end and bias output, wherein the driver
Circuit includes the difference low-voltage driver circuit for being coupled to internal Vdd；
First transmission line road is electrically coupled to first data output end of the drive circuit, the first transmission line road
It is characterized in that data circuit impedance value；
Second transmission line road is electrically coupled to the bias output of the drive circuit, the spy on the second transmission line road
Sign is biasing circuit impedance value；
Third transmission line is electrically coupled to second data output end of the drive circuit, the third transmission line
It is characterized in that data circuit impedance value；
First modulator diode, has first anode terminal and the first cathode terminal, and the first anode terminal is coupled to institute
It states first transmission line road and first cathode terminal is coupled to the second transmission line road；And
Second modulator diode, has second plate terminal and the second cathode terminal, and the second plate terminal is coupled to institute
It states third transmission line and second cathode terminal is coupled to the second transmission line road.
14. system according to claim 13 further comprises being coupled to the first transmission line road and third biography
The diode termination resistor of defeated route, wherein the diode termination resistor is configured as not influencing first tune
Reduce signal reflex in the case where the configuration of device diode processed and the second modulator diode.
15. system according to claim 13, wherein the drive circuit includes pre-driver circuit, high-speed driving
Device circuit and bias generator circuit；Wherein, the high-speed driver circuit includes first data output end and described
Second data output end, and wherein, the bias generator circuit includes the bias output；
Wherein, the first transmission line road and the third transmission line configuration are as data circuit；And
Wherein, the second transmission line road is configured as biasing circuit；Wherein, the first modulator diode and described second
Modulator diode is configured as electrooptic modulator (EOM) or electroabsorption modulator (EAM).
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US201361919570P | 2013-12-20 | 2013-12-20 | |
| US61/919,570 | 2013-12-20 | ||
| US14/226,649 US10551641B1 (en) | 2013-12-20 | 2014-03-26 | Method and system of a three-terminal driver for modulator devices |
| US14/226,649 | 2014-03-26 |
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| Publication Number | Publication Date |
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| CN104734693A CN104734693A (en) | 2015-06-24 |
| CN104734693B true CN104734693B (en) | 2018-12-07 |
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| CN201410729247.7A Active CN104734693B (en) | 2013-12-20 | 2014-12-03 | The method and system of the three end drivers for modulator device |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101040439A (en) * | 2004-10-12 | 2007-09-19 | 皇家飞利浦电子股份有限公司 | Low voltage, high-speed output-stage for laser or modulator driving |
| CN101848571A (en) * | 2009-03-23 | 2010-09-29 | 三星电机株式会社 | LED driving circuit |
| CN201859637U (en) * | 2010-09-25 | 2011-06-08 | 冠捷投资有限公司 | Isolated light-emitting diode driver |
| CN103066987A (en) * | 2011-10-24 | 2013-04-24 | 三星电子株式会社 | Output driver, integrated circuit, and system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7612629B2 (en) * | 2006-05-26 | 2009-11-03 | Picosecond Pulse Labs | Biased nonlinear transmission line comb generators |
| US8803451B2 (en) * | 2012-02-16 | 2014-08-12 | Osram Sylvania Inc. | Multiplexer circuit for dual thermistor operation using a single line coupling |
-
2014
- 2014-12-03 CN CN201410729247.7A patent/CN104734693B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101040439A (en) * | 2004-10-12 | 2007-09-19 | 皇家飞利浦电子股份有限公司 | Low voltage, high-speed output-stage for laser or modulator driving |
| CN101848571A (en) * | 2009-03-23 | 2010-09-29 | 三星电机株式会社 | LED driving circuit |
| CN201859637U (en) * | 2010-09-25 | 2011-06-08 | 冠捷投资有限公司 | Isolated light-emitting diode driver |
| CN103066987A (en) * | 2011-10-24 | 2013-04-24 | 三星电子株式会社 | Output driver, integrated circuit, and system |
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| CN104734693A (en) | 2015-06-24 |
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