CN113687679A - Cable voltage drop compensation circuit and ultrasonic imaging system - Google Patents
Cable voltage drop compensation circuit and ultrasonic imaging system Download PDFInfo
- Publication number
- CN113687679A CN113687679A CN202110764085.0A CN202110764085A CN113687679A CN 113687679 A CN113687679 A CN 113687679A CN 202110764085 A CN202110764085 A CN 202110764085A CN 113687679 A CN113687679 A CN 113687679A
- Authority
- CN
- China
- Prior art keywords
- voltage
- cable
- resistor
- operational amplifier
- compensation circuit
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Ultra Sonic Daignosis Equipment (AREA)
Abstract
The cable voltage drop compensation circuit comprises a voltage stabilization module, a sampling conversion module, a cable for connecting a load and a sampling resistor connected between the voltage stabilization module and the cable, wherein the voltage stabilization module is set to output current and a first voltage to the sampling resistor; the sampling conversion module is configured to collect a second voltage generated by the current passing through the sampling resistor and at two ends of the sampling resistor, convert the second voltage into a third voltage according to a set rule, and output the third voltage to the voltage stabilization module; the voltage stabilizing module is configured to adjust the first voltage according to the third voltage to compensate for a voltage drop of the current on the cable.
Description
Technical Field
The invention relates to the technical field of circuit design, in particular to a cable voltage drop compensation circuit and an ultrasonic imaging system.
Background
Existing ultrasound imaging systems may typically include an ultrasound imaging device, a cable, and an ultrasound probe. The ultrasound imaging apparatus may be connected to the ultrasound probe by a cable and transmit an electrical signal to the ultrasound probe through the cable.
With the increase of the number of transducer elements in the ultrasonic probe, in order not to increase the number of cores inside the cable, more and more electronic components are integrated inside the ultrasonic probe for controlling and selecting different transducer elements. Therefore, the ultrasound imaging apparatus needs to supply sufficient voltage and current to the electronic components inside the ultrasound probe.
Because the power is in ultrasonic imaging equipment, therefore the electric current need flow through the cable and can reach the inside electronic components of ultrasonic probe, can cause certain voltage loss on the cable like this for the voltage that reaches ultrasonic probe will be less than the voltage that ultrasonic imaging equipment provided, and then probably leads to the unable normal work of electronic components in the ultrasonic probe.
Disclosure of Invention
It is an object of embodiments of the present invention to provide a new solution to at least one of the above problems.
According to a first aspect of the present invention, there is provided a cable voltage drop compensation circuit, comprising a voltage stabilization module, a sampling conversion module, a cable for connecting a load, and a sampling resistor connected between the voltage stabilization module and the cable, the voltage stabilization module being configured to output a current and a first voltage to the sampling resistor; the sampling conversion module is configured to collect a second voltage generated by the current passing through the sampling resistor and at two ends of the sampling resistor, convert the second voltage into a third voltage according to a set rule, and output the third voltage to the voltage stabilization module; the voltage stabilizing module is configured to adjust the first voltage according to the third voltage to compensate for a voltage drop of the current on the cable.
Optionally, the sampling conversion module includes a differential amplifier, two input ends of the differential amplifier are respectively connected to two ends of the sampling resistor, and an output end of the differential amplifier is connected to the voltage stabilization module.
Optionally, the differential amplifier includes a first operational amplifier, a first resistor and a second resistor, the first resistor is connected between the inverting input terminal of the first operational amplifier and the output terminal of the first operational amplifier, the second resistor is connected between the inverting input terminal of the first operational amplifier and a first potential point, and the non-inverting input terminal of the first operational amplifier is connected to a second potential point; the first potential point is a potential point between the sampling resistor and the voltage stabilizing module, and the second potential point is a potential point between the sampling resistor and the cable.
Optionally, the first ratio is equal to a second ratio, where the first ratio is a ratio between a resistance value of the first resistor and a resistance value of the second resistor, and the second ratio is a ratio between a resistance value of the cable and a resistance value of the sampling resistor.
Optionally, the voltage stabilizing module includes a first power terminal and a voltage follower, and the voltage follower is configured to output the first voltage according to the third voltage and a first setting voltage input by the first power terminal.
Optionally, the voltage follower includes a second operational amplifier, a non-inverting input terminal of the second operational amplifier is connected to the first power supply terminal, an inverting input terminal of the second operational amplifier is connected to the sampling conversion module, and the inverting input terminal of the second operational amplifier is further connected to an output terminal of the second operational amplifier.
Optionally, the cable drop compensation circuit further includes a second power supply terminal for inputting a second setting voltage, and the voltage stabilization module is further configured to output the current according to the second setting voltage input by the second power supply terminal.
Optionally, the voltage stabilizing module further includes an emitter follower, an input end of the emitter follower is connected to an output end of the second operational amplifier, an output end of the emitter follower is connected to the sampling resistor, and a power supply end of the emitter follower is connected to the second power supply end.
Optionally, the emitter follower includes a third resistor, a fourth resistor and a triode, the third resistor is connected between the output end of the second operational amplifier and the base of the triode, the fourth resistor is connected between the emitter and the ground of the triode, the collector of the triode is connected with the second power supply end, and the emitter of the triode is further connected with the sampling resistor.
According to a second aspect of the present disclosure, there is provided an ultrasound imaging system comprising an ultrasound probe and a cable drop compensation circuit according to the first aspect of the present disclosure, the ultrasound probe being connected with the cable in the cable drop compensation circuit.
In the embodiment of the invention, the voltage drop caused by the cable can be compensated by arranging the voltage stabilizing module, the sampling conversion module and the sampling resistor, and the problems that the voltage of the input load is reduced and the normal work of the load is influenced due to the voltage drop of the cable are effectively solved. Moreover, by arranging the sampling resistor and the sampling conversion module at the output end of the voltage stabilization module, different compensations can be performed for different voltage drops generated by the cable when the current output by the voltage stabilization module is different.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a block schematic diagram of one embodiment of a cable drop compensation circuit according to the present invention;
FIG. 2 is a flow diagram of another embodiment of a cable drop compensation circuit according to the present invention;
fig. 3 is a schematic circuit diagram of a cable drop compensation circuit according to the present invention.
Detailed Description
Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: the relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
With existing ultrasound imaging systems, ultrasound imaging devices, cables, and ultrasound probes may typically be included. The ultrasound imaging apparatus may be connected to the ultrasound probe by a cable and transmit an electrical signal to the ultrasound probe through the cable.
With the increase of the number of transducer elements in the ultrasonic probe, in order not to increase the number of cores inside the cable, more and more electronic components are integrated inside the ultrasonic probe for controlling and selecting different transducer elements. Therefore, the ultrasound imaging apparatus needs to supply sufficient voltage and current to the electronic components inside the ultrasound probe.
Because the power is in ultrasonic imaging equipment, therefore the electric current need flow through the cable and can reach the inside electronic components of ultrasonic probe, can cause certain voltage loss on the cable like this for the voltage that reaches ultrasonic probe will be less than the voltage that ultrasonic imaging equipment provided, and then probably leads to the unable normal work of electronic components in the ultrasonic probe.
Accordingly, the present disclosure provides a cable drop compensation circuit to compensate for a cable induced drop.
As shown in fig. 1, the cable drop compensation circuit 1000 may include a voltage stabilization module 1100, a sampling conversion module 1200, a cable 1300 for connecting a load, and a sampling resistor 1400 connected between the voltage stabilization module 1100 and the cable 1300.
In this embodiment, the voltage stabilization module 1100 is configured to output a current and a first voltage to the sampling resistor.
Specifically, the sampling resistor 1400, the cable 1300 and the load may be connected in series between the output Vo of the voltage stabilizing module 1100 and the ground GND of the cable drop compensating circuit 1000. The equivalent circuit may be as shown in fig. 1, and the sampling resistor 1400 is connected to the output Vo of the voltage stabilizing module 1100. The voltage stabilization module 1100 outputs a current and a first voltage through the output terminal Vo.
The sampling conversion module 1200 is configured to collect a second voltage generated across the sampling resistor by the current passing through the sampling resistor, convert the second voltage into a third voltage according to a set rule, and output the third voltage to the voltage stabilization module 1100.
The current output by the voltage stabilizing module 1100 flows through the sampling resistor, and a voltage drop, i.e., a second voltage, is generated across the sampling resistor.
The sampling conversion module 1200 converts the second voltage into the third voltage according to a set rule, specifically, the second voltage may be amplified, and the amplification ratio may be pre-determined according to a resistance R of the sampling resistor 1400senseAnd resistance R of cable 1300cableAnd (4) determining. For example, the magnification ratio may be
The voltage stabilization module 1100 is further configured to adjust the first voltage according to the third voltage to compensate for a voltage drop caused by the current passing through the cable.
In this embodiment, the voltage stabilizing module 1100 may increase the first voltage according to the third voltage, so that the first voltage output to the sampling resistor 1400 is increased, because the current output by the voltage stabilizing module 1100 may be determined by the resistance of the sampling resistor 1400, the resistance of the cable 1300, and the resistance of the load, under the condition that the resistance of the sampling resistor 1400, the resistance of the cable 1300, and the resistance of the load are not changed, the current flows through the sampling resistor 1400 and the cable 1300, and the voltage drop generated at the two ends of the sampling resistor 1400 and the cable 1300 is not changed, so that the voltage input to the load is increased, and the voltage drop generated by the current on the cable 1300 can be compensated.
In the embodiment of the invention, the voltage drop caused by the cable can be compensated by arranging the voltage stabilizing module, the sampling conversion module and the sampling resistor, and the problems that the voltage of the input load is reduced and the normal work of the load is influenced due to the voltage drop of the cable are effectively solved. Moreover, by arranging the sampling resistor and the sampling conversion module at the output end of the voltage stabilization module, different compensations can be performed for different voltage drops generated by the cable when the current output by the voltage stabilization module is different.
When the cable voltage drop compensation circuit is used for connecting the ultrasonic probe, the cable does not need to be provided with an additional fiber core to acquire the voltage of the ultrasonic probe for negative feedback, the diameter of the cable can be reduced, and the cost of the cable is saved. In addition, the sampling resistor can be arranged at the near end of the cable, and the current can be detected without providing an additional fiber core for providing a voltage signal by the cable.
In one embodiment of the present disclosure, the sample conversion module 1200 may be provided by a differential amplifier 1210, as shown in fig. 2. Two input ends of the differential amplifier are respectively connected to two ends of the sampling resistor, and an output end of the differential amplifier is connected with the voltage stabilizing module 1100.
In one example, as shown in fig. 3, the cable 1300 may be connected between the sampling resistor 1400 and the load 2000, and the load 2000 may be connected between the cable 1300 and the ground GND.
As in the example shown in fig. 3, the differential amplifier may include a first operational amplifier 1211, a first resistor 1212 and a second resistor 1213, the first resistor 1212 is connected between the inverting input terminal of the first operational amplifier 1211 and the output terminal of the first operational amplifier 1211, the second resistor 1213 is connected between the inverting input terminal of the first operational amplifier 1211 and a first potential point, and the non-inverting input terminal of the first operational amplifier 1211 is connected to a second potential point, wherein the first potential point is a potential point between the sampling resistor 1400 and the voltage stabilizing module 1100, and the second potential point is a potential point between the sampling resistor 1400 and the cable 1300.
With the differential amplifier 1210 of this embodiment, the third voltage V3 converted from the second voltage V2 across the sampling resistor 1400 may be
Wherein, R1 is the resistance of the first resistor, and R2 is the resistance of the second resistor.
In order to amplify the second voltage by the differential amplifier, the amplification factor of the third voltage is obtained
Is equal to
The first ratio may be equal to a second ratio, where the first ratio is a ratio between the resistance of the first resistor and the resistance of the second resistor, and the second ratio is a ratio between the resistance of the cable and the resistance of the sampling resistor.
In one embodiment of the present disclosure, as shown in fig. 2, the voltage stabilizing module 1100 may further include a first power source terminal Vset and a voltage follower 1110, the voltage follower 1110 being configured to output the first voltage according to the third voltage and a first set voltage inputted from the first power source terminal Vset.
In one example, as shown in fig. 3, the voltage follower 1110 may be provided by a second operational amplifier 1111. A non-inverting input terminal of the second operational amplifier 1111 is connected to the first power source terminal Vset, an inverting input terminal of the second operational amplifier 1111 is connected to an output terminal of the sampling conversion module 1200 for outputting the third voltage, and an inverting input terminal of the second operational amplifier 1111 is further connected to an output terminal of the second operational amplifier 1111.
In this embodiment, in the case that the sampling conversion module 1200 outputs the third voltage V3, the first voltage V1 output by the second operational amplifier 1111 may be represented as V1 ═ V4- (V3-V4). V4 is a first set voltage inputted from the first power terminal Vset.
Further, the cable drop compensation circuit further includes a second power supply terminal Vp for inputting a second setting voltage, and the voltage stabilization module 1100 is further configured to output a current according to the second setting voltage inputted by the second power supply terminal Vp.
In this embodiment, the magnitude of the current output by the voltage stabilizing module 1100 may be determined by the resistance of the sampling resistor 1400, the resistance of the cable 1300, and the resistance of the load. Under the condition that the load connected to the cable drop compensation circuit is not changed, the current output by the voltage stabilization module 1100 is not changed.
In one embodiment of the present disclosure, as shown in fig. 2, the voltage stabilizing module 1100 may further include an emitter follower 1120, an input terminal of the emitter follower 1120 is connected to an output terminal of the second operational amplifier 1210, an output terminal of the emitter follower 1120 is connected to the sampling resistor, and a power source terminal of the emitter follower 1120 is connected to the second power source terminal Vp.
The voltage inputted to the input terminal of the emitter follower 1120 is equal to the voltage outputted from the output terminal thereof. Since the input terminal of the emitter follower 1120 is connected to the output terminal of the second operational amplifier 1210, the voltage input to the input terminal of the emitter follower 1120 is the first voltage, and the voltage output from the output terminal of the emitter follower 1120 is also the first voltage.
When the first voltage is inputted to the input terminal of the emitter follower 1120, the emitter follower 1120 can output a current according to the second setting voltage inputted from the second power source terminal Vp.
In one example, as shown in fig. 3, the emitter follower 1120 may include a third resistor 1121, a fourth resistor 1122, and a transistor 1123, wherein the third resistor 1121 is connected between the output terminal of the second operational amplifier 1210 and the base of the transistor 1123, the fourth resistor 1122 is connected between the emitter of the transistor 1123 and the ground terminal GND, the collector of the transistor 1123 is connected to the second power source terminal Vp, and the emitter of the transistor 1123 is further connected to the sampling resistor.
In this embodiment, the transistor 1123 may be an NPN transistor.
In one embodiment of the present disclosure, the cable drop compensation circuit may also be used in a virtual reality host, and the virtual reality host is connected to a virtual reality display device through the cable drop compensation circuit to provide a first voltage and a first current for the virtual reality display device to operate normally.
The present disclosure also provides an ultrasound imaging system that may include an ultrasound probe and a cable drop compensation circuit as provided in any of the foregoing embodiments. Wherein the ultrasonic probe can be used as a load connected with a cable in the cable voltage drop compensation circuit.
In one example, the ultrasound imaging system may further include an ultrasound imaging device, which provides the first voltage and current to the ultrasound probe through the cable drop compensation circuit of the present embodiment, so that the ultrasound probe operates normally.
The above embodiments mainly focus on differences from other embodiments, but it should be clear to those skilled in the art that the above embodiments can be used alone or in combination with each other as needed.
Although some specific embodiments of the present invention have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that modifications may be made to the above embodiments without departing from the scope and spirit of the invention. The scope of the invention is defined by the appended claims.
Claims (10)
1. A cable voltage drop compensation circuit is characterized by comprising a voltage stabilizing module, a sampling conversion module, a cable for connecting a load and a sampling resistor connected between the voltage stabilizing module and the cable, wherein the voltage stabilizing module is arranged to output current and a first voltage to the sampling resistor; the sampling conversion module is configured to collect a second voltage generated by the current passing through the sampling resistor and at two ends of the sampling resistor, convert the second voltage into a third voltage according to a set rule, and output the third voltage to the voltage stabilization module; the voltage stabilizing module is configured to adjust the first voltage according to the third voltage to compensate for a voltage drop of the current on the cable.
2. The cable voltage drop compensation circuit of claim 1, wherein the sampling conversion module comprises a differential amplifier, two input ends of the differential amplifier are respectively connected to two ends of the sampling resistor, and an output end of the differential amplifier is connected to the voltage stabilization module.
3. The cable drop compensation circuit of claim 2, wherein the differential amplifier comprises a first operational amplifier, a first resistor, and a second resistor, the first resistor being connected between the inverting input of the first operational amplifier and the output of the first operational amplifier, the second resistor being connected between the inverting input of the first operational amplifier and a first potential point, the non-inverting input of the first operational amplifier being connected to a second potential point; the first potential point is a potential point between the sampling resistor and the voltage stabilizing module, and the second potential point is a potential point between the sampling resistor and the cable.
4. The cable drop compensation circuit of claim 3, wherein a first ratio is equal to a second ratio, wherein the first ratio is a ratio between a resistance value of the first resistor and a resistance value of the second resistor, and the second ratio is a ratio between a resistance value of the cable and a resistance value of the sampling resistor.
5. The cable drop compensation circuit of claim 1, wherein the voltage stabilization module comprises a first power supply terminal and a voltage follower, the voltage follower being configured to output the first voltage according to the third voltage and a first set voltage input by the first power supply terminal.
6. The cable drop compensation circuit of claim 5, wherein the voltage follower comprises a second operational amplifier, a non-inverting input of the second operational amplifier is connected to the first power supply terminal, an inverting input of the second operational amplifier is connected to the sampling conversion module, and the inverting input of the second operational amplifier is further connected to the output of the second operational amplifier.
7. The cable drop compensation circuit of claim 6, further comprising a second power supply terminal for inputting a second set voltage, wherein the voltage stabilization module is further configured to output the current according to the second set voltage inputted by the second power supply terminal.
8. The cable drop compensation circuit of claim 7, wherein the voltage stabilization module further comprises an emitter follower, an input terminal of the emitter follower is connected with an output terminal of the second operational amplifier, an output terminal of the emitter follower is connected with the sampling resistor, and a power supply terminal of the emitter follower is connected with the second power supply terminal.
9. The cable drop compensation circuit of claim 8, wherein the emitter follower comprises a third resistor, a fourth resistor, and a transistor, the third resistor is connected between the output of the second operational amplifier and the base of the transistor, the fourth resistor is connected between the emitter of the transistor and a ground terminal, the collector of the transistor is connected to the second power source terminal, and the emitter of the transistor is further connected to the sampling resistor.
10. An ultrasound imaging system, characterized in that the ultrasound imaging system comprises an ultrasound probe and a device according to any of claims 1 to 9
The ultrasonic probe is connected with the cable in the cable voltage drop compensation circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110764085.0A CN113687679A (en) | 2021-07-06 | 2021-07-06 | Cable voltage drop compensation circuit and ultrasonic imaging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110764085.0A CN113687679A (en) | 2021-07-06 | 2021-07-06 | Cable voltage drop compensation circuit and ultrasonic imaging system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113687679A true CN113687679A (en) | 2021-11-23 |
Family
ID=78576725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110764085.0A Pending CN113687679A (en) | 2021-07-06 | 2021-07-06 | Cable voltage drop compensation circuit and ultrasonic imaging system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113687679A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114343708A (en) * | 2022-01-05 | 2022-04-15 | 京东方科技集团股份有限公司 | Ultrasonic array substrate, driving method, detection system and application method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105373177A (en) * | 2014-08-07 | 2016-03-02 | 济南芯驰能源科技有限公司 | An automatic circuit voltage drop compensating circuit for an aircraft ground static inverter |
| CN107482909A (en) * | 2017-07-28 | 2017-12-15 | 惠州市德赛西威汽车电子股份有限公司 | A kind of line loss compensation circuit of power supply |
| CN108574310A (en) * | 2017-03-07 | 2018-09-25 | 厦门歌乐电子企业有限公司 | A kind of USB interface charging circuit |
| CN109491435A (en) * | 2018-12-28 | 2019-03-19 | 上海南芯半导体科技有限公司 | A kind of line loss compensation circuit and implementation method |
| CN110086338A (en) * | 2019-05-21 | 2019-08-02 | 重庆大学 | A kind of line loss compensation circuit of DC/DC converter |
-
2021
- 2021-07-06 CN CN202110764085.0A patent/CN113687679A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105373177A (en) * | 2014-08-07 | 2016-03-02 | 济南芯驰能源科技有限公司 | An automatic circuit voltage drop compensating circuit for an aircraft ground static inverter |
| CN108574310A (en) * | 2017-03-07 | 2018-09-25 | 厦门歌乐电子企业有限公司 | A kind of USB interface charging circuit |
| CN107482909A (en) * | 2017-07-28 | 2017-12-15 | 惠州市德赛西威汽车电子股份有限公司 | A kind of line loss compensation circuit of power supply |
| CN109491435A (en) * | 2018-12-28 | 2019-03-19 | 上海南芯半导体科技有限公司 | A kind of line loss compensation circuit and implementation method |
| CN110086338A (en) * | 2019-05-21 | 2019-08-02 | 重庆大学 | A kind of line loss compensation circuit of DC/DC converter |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114343708A (en) * | 2022-01-05 | 2022-04-15 | 京东方科技集团股份有限公司 | Ultrasonic array substrate, driving method, detection system and application method |
| CN114343708B (en) * | 2022-01-05 | 2024-05-14 | 京东方科技集团股份有限公司 | Ultrasonic array substrate, driving method, detection system and application method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20040140819A1 (en) | Differential voltage probe | |
| CN101231535B (en) | Method and apparatus for overshoot and undershoot errors correction in analog low pressure difference linear voltage regulator | |
| JP2007027895A (en) | Current-voltage conversion circuit, and power consumption detection circuit and electronic equipment using the same | |
| EP2722677A2 (en) | Active shunt ammeter apparatus and method | |
| KR101024220B1 (en) | Power applying circuit and testing apparatus | |
| CN1815243A (en) | Differential termination and attenuator network for a measurement probe having an internal termination voltage generator | |
| CN113687679A (en) | Cable voltage drop compensation circuit and ultrasonic imaging system | |
| US20060273811A1 (en) | Using an active load as a high current output stage of a precision pin measurement unit in automatic test equipment systems | |
| CN112034918A (en) | AVS voltage regulating circuit and device | |
| US7123080B2 (en) | Differential amplification input circuit | |
| CN1815244A (en) | Differential termination and attenuator network for a measurement probe | |
| US5153510A (en) | High impedance system for measuring voltage | |
| US20170070216A1 (en) | Single-ended to differential conversion circuit and signal processing module | |
| EP3139502B1 (en) | Single-ended to differential conversion circuit and signal processing module | |
| JP2008261722A (en) | Probe | |
| JPH0590851A (en) | Integrated circuit device having differential amplifier | |
| US6680642B2 (en) | Analog bipolar current source | |
| CN108072790B (en) | Current measuring circuit and current measuring method | |
| EP0903847B1 (en) | Amplifier circuit | |
| US20210132641A1 (en) | Dynamic voltage compensation circuit and method thereof | |
| US7135920B2 (en) | Method and circuit for facilitating control of AC coupling in an amplifier circuit | |
| CN113030689B (en) | Test circuit, test method and test device of operational amplifier | |
| US20070030188A1 (en) | Reference module apparatus and method therefor | |
| JP5190103B2 (en) | Voltage generator, current generator | |
| CN218549746U (en) | Ceramic pressure sensor adjusting circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20221009 Address after: Room 303-24, 3rd Floor, Building 4, Yard 9, Yike Road, Life Science Park, Changping District, Beijing 102206 Applicant after: Yichao Medical Technology (Beijing) Co.,Ltd. Address before: 100176 room 103, floor 1, Building 29, yard 18, Kechuang 13th Street, economic and Technological Development Zone, Daxing District, Beijing Applicant before: Yichao Technology (Beijing) Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20230419 Address after: 701-715 West of Building B1, 7th Floor, Phase II, Block B, Wuhan High tech Medical Equipment Park, No. 818 Gaoxin Avenue, Donghu New Technology Development Zone, Wuhan, Hubei Province, 430206 (Wuhan Free Trade Zone) Applicant after: Yichao Technology (Wuhan) Co.,Ltd. Address before: Room 303-24, 3rd Floor, Building 4, Yard 9, Yike Road, Life Science Park, Changping District, Beijing 102206 Applicant before: Yichao Medical Technology (Beijing) Co.,Ltd. |
|
| TA01 | Transfer of patent application right |