CN108769873A - A kind of signal switching circuit and electronic equipment - Google Patents
A kind of signal switching circuit and electronic equipment Download PDFInfo
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- CN108769873A CN108769873A CN201810501602.3A CN201810501602A CN108769873A CN 108769873 A CN108769873 A CN 108769873A CN 201810501602 A CN201810501602 A CN 201810501602A CN 108769873 A CN108769873 A CN 108769873A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
- H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
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- General Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Electronic Switches (AREA)
Abstract
The invention discloses a kind of signal switching circuit and electronic equipment, which includes analog switch, the first input end for inputting first voltage signal, the second input terminal for inputting second voltage signal, the output end for output current signal, the control terminal for input control signal and first voltage current conversion module and second voltage current conversion module；First voltage current conversion module is arranged to first voltage signal being converted to the first input pin that the first current signal is sent to analog switch；Second voltage current conversion module is arranged to second voltage signal being converted to the second input pin that the second current signal is sent to analog switch；The output pin of analog switch is connect with output end；Control terminal connect with the controlling switch of simulation switching chip, and analog switch is arranged to according to controlling signal by the first current signal received or the second current signal transfer to output pin.
Description
Technical field
The present invention relates to technical field of circuit design, more particularly it relates to a kind of signal switching circuit and electronics
Equipment.
Background technology
Audio signal switching circuit between different input signals for switching over, to export the desired letter of user
Number, common signal switching mode, which has, physically to be switched, relay, electronic analog swtich etc..Though physically switch and relay
Right contact impedance is low, and distortion is small, but has that volume is big, and operation and the inconvenient disadvantage of control are not suitable for the application of miniaturized products, because
This electronic analog swtich is common switch form in small sized product.
The signal switching circuit of common application simulation switching switch is usually as shown in Figure 1, the signal switching circuit is logical
Overvoltage is limited by the supply voltage of analog switch, for example, if necessary to the sound that distortionless switching amplitude is 2V
Frequency signal (2V is the common standard output level of civilian audio frequency apparatus), then need the supply voltage of analog switch at least high
In the peak value (being usually 5.6V) of signal voltage, otherwise signal will produce clipping distortion when passing through analog switch, simulation
The oscillogram of the signal of switching switch output is as shown in Figure 5, wherein abscissa indicates that time, ordinate indicate output signal
Voltage.The supply voltage of the small signal processing system or digital-to-analog conversion system that are usually connect with analog switch is
3.3V, is individually for analog switch and designs higher supply voltage being a significant increase the design complexities of power-supply system and be
The power consumption of system, and need to select the analog switch of high voltage, this adds increased hardware costs.As directly powered using 3.3V
Then maximum can only input the signal of 1V amplitudes to voltage, will produce serious distortion when signal exceeds this range.
Invention content
One purpose of the embodiment of the present invention is to provide a kind of new technical side that one of can at least solve the above problems
Case.
According to the first aspect of the invention, provide a kind of signal switching circuit, including analog switch, for inputting
The first input end of first voltage signal, the second input terminal for inputting second voltage signal, for output current signal
Output end, the control terminal for input control signal and first voltage current conversion module and second voltage current conversion module；
The first voltage current conversion module, which is arranged to the first voltage signal being converted to the first current signal, is sent to institute
State the first input pin of analog switch；The second voltage current conversion module is arranged to believe the second voltage
Number be converted to the second input pin that the second current signal is sent to the analog switch；The analog switch it is defeated
Go out pin to connect with the output end；The control terminal is connect with the controlling switch of the simulation switching chip, and the simulation is cut
Switch is changed to be arranged to first current signal received or second current signal according to the control signal
It is transmitted to the output pin.
Optionally, the first voltage current conversion module and the second voltage current conversion module are carried by resistance
For.
Optionally, the signal switching circuit further includes control module, and the control module is arranged in the mould
In the case that one of quasi- switching switch input pin is connect with output pin, the another of the analog switch is controlled
A input pin is connect with ground terminal.
Optionally, the control module includes PNP triode, the first NPN triode and the second NPN triode, described
First input pin is connect through first NPN triode with the ground terminal, and second input pin is through the 2nd NPN
Triode is connect with the ground terminal, and the base stage of first NPN triode connects with the controlling switch of the analog switch
It connects, the base stage of the PNP triode is connect with the controlling switch, and the base stage of second NPN triode is through tri- poles the PNP
Pipe is connect with power end.
Optionally, the signal switching circuit further includes the first biasing module and the second biasing module, and described first partially
Module is set to be arranged to that the operating point of first input pin is arranged；Second biasing module is arranged to be arranged described
The operating point of two input pins.
Optionally, first biasing module includes first resistor, second resistance and 3rd resistor, the first resistor
Be connected in series between the powered end and the ground end with the second resistance, the 3rd resistor be connected to the first input end,
Between potential point between the first resistor and the second resistance.
Optionally, second biasing module includes the 4th resistance, the 5th resistance and the 6th resistance, the 4th resistance
And the 5th resistance is connected in series between power end and ground terminal, the 6th resistance be connected to second input terminal,
Between potential point between the 4th resistance and the 5th resistance.
Optionally, the first resistor and the 4th resistance are provided by same resistance device, the second resistance and
5th resistance is provided by same resistance device.
According to the second aspect of the invention, a kind of electronic equipment is provided, including described according to a first aspect of the present invention
Signal switching circuit.
Optionally, the electronic equipment further includes electric current input cake core, and the input of the electric current input cake core is drawn
Foot is connect with the output end.
The advantageous effect of the present invention is, by the Voltage to current transducer module in advance respectively by first input end and
The voltage signal of second input terminal input is converted to current signal so that analog switch transmission is exactly current signal.Into
One step makes theoretically that the voltage by analog switch is close to no-voltage, the effective solution voltage swing of analog switch
There is signal mistake when the voltage in the input signal of analog switch being avoided to be more than the voltage of control signal in width restricted problem
Genuine problem.
By referring to the drawings to the detailed description of exemplary embodiment of the present invention, other feature of the invention and its
Advantage will become apparent.
Description of the drawings
It is combined in the description and the attached drawing of a part for constitution instruction shows the embodiment of the present invention, and even
With its explanation together principle for explaining the present invention.
Fig. 1 is the frame principle figure of existing signal switching circuit；
Fig. 2 is according to a kind of a kind of frame principle figure of implementation structure of signal switching circuit of the present invention；
Fig. 3 is another frame principle figure for implementing structure according to a kind of signal switching circuit of the present invention；
Fig. 4 is according to a kind of a kind of circuit diagram for implementing structure of signal switching circuit of the present invention；
Fig. 5 is the oscillogram of the signal of existing signal switching circuit output；
Fig. 6 is the oscillogram of the signal of the signal switching circuit output of the present invention.
Reference sign：
U1- analog switch；U21, U22- Voltage to current transducer module；
In1- first input ends；The second input terminals of in2-；
Ctrl- control terminals；Out1- output ends；
U3- control modules；U41, U42- biasing module；
D1, D2- diode；Q1, Q2-NPN triode；
Q3-PNP triodes；GND- ground terminals；
VCC- power ends；R1~R8, R21, R22- resistance；
P1, P2- potential point.
Specific implementation mode
Carry out the various exemplary embodiments of detailed description of the present invention now with reference to attached drawing.It should be noted that：Unless in addition having
Body illustrates that the unlimited system of component and the positioned opposite of step, numerical expression and the numerical value otherwise illustrated in these embodiments is originally
The range of invention.
It is illustrative to the description only actually of at least one exemplary embodiment below, is never used as to the present invention
And its application or any restrictions that use.
Technology, method and apparatus known to person of ordinary skill in the relevant may be not discussed in detail, but suitable
In the case of, the technology, method and apparatus should be considered as part of specification.
In shown here and discussion all examples, any occurrence should be construed as merely illustrative, without
It is as limitation.Therefore, other examples of exemplary embodiment can have different values.
It should be noted that：Similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined, then it need not be further discussed in subsequent attached drawing in a attached drawing.
Voltage in order to solve the input signal of analog switch existing in the prior art is more than the electricity of control signal
When pressure, can cause output distorted signals the problem of, provide a kind of signal switching circuit.As shown in Fig. 2, signal switching electricity
Road includes analog switch U1, the first input end in1 for inputting first voltage signal, for inputting second voltage signal
The second input terminal in2, the output end out1 for output current signal, the control terminal Ctrl for input control signal and
First voltage current conversion module U21 and second voltage current conversion module U22.The U21 connections of first voltage current conversion module
Between the first input pin in11 of first input end in1 and analog switch U1, first voltage current conversion module U21
It is arranged to first voltage signal being converted to the first current signal, and the first current signal is sent to analog switch U1
The first input pin in11.Second voltage current conversion module U22 is connected to the second input terminal in2 and analog switch U1
The second input pin in12 between, second voltage current conversion module U22 is arranged to second voltage signal being converted to
Two current signals, and the second current signal is sent to the second input pin in12 of analog switch U1.Simulation switching is opened
The output pin out11 for closing U1 is connect with output end out1；The controlling switch Ctrl1 of control terminal Ctrl and simulation switching chip U1
Connection, to receive the control signal of control terminal Ctrl inputs.Analog switch U1 is arranged to be received according to control signal
The first current signal or the second current signal transfer arrived is to output pin out11.
Specifically, first voltage current conversion module U21 and second voltage current conversion module U22 can be by the electricity of input
Pressure signal is converted into meeting the current signal of certain relationship, and the adjustable constant-current source of the transformed suitable output of electric current is defeated
Going out electric current should be able to keep stabilization to change without the variation with load.The electricity of first voltage current conversion module U21 and second
Current voltage conversion module U22 can be provided by voltage current adapter.
In one particular embodiment of the present invention, as shown in figure 4, the electricity of first voltage current conversion module U21 and second
Current voltage conversion module U22 can be provided by resistance R21 and resistance R22 respectively.It may be implemented to turn voltage signal by resistance
It is changed to the function of current signal, and circuit structure is simple, is easy to implement.Circuit footprint can also be reduced.
Further, control signal can be high level or low level.For example, analog switch U1 can controlled
When pin Ctrl1 processed receives the control signal of high level, output pin out11 is connect with the first input pin in11 so that
Analog switch U1 is by the first current signal transfer of the first input pin in11 input to output pin out11, output end
Out1 also exports the first current signal.Analog switch U1 can receive low level control in controlling switch Ctrl1
When signal, output pin out11 is connect with the second input pin in12 so that analog switch U1 is by the second input pin
Second current signal transfer of in12 inputs also exports the second current signal to output pin out12, output end out1.
In this way, by Voltage to current transducer module U21, U22 in advance respectively by first input end in1 and the second input terminal
The voltage signal of in2 inputs is converted to current signal, then, analog switch U1 transmission is exactly current signal.This just makes
Theoretically by the voltage of analog switch U1 close to no-voltage, the effective solution voltage swing of analog switch U1
There is signal mistake when the voltage in the input signal of analog switch being avoided to be more than the voltage of control signal in width restricted problem
Genuine problem.Hardware cost can also be reduced.
The signal switching circuit supply voltage less than first input end or the second input terminal input voltage signal
In the case of voltage, for example, supply voltage is 1.2V, the voltage of first input end and the second input terminal input voltage signal is
2V, signal switching circuit through the invention still can the undistorted signal for switching transmission input.Fig. 6 is the present embodiment
The waveform of the signal of signal switching circuit output, wherein abscissa indicates that time, ordinate indicate the voltage of output signal.
Fig. 3 is another frame principle figure for implementing structure according to a kind of signal switching circuit of the present invention.
According to Fig.3, which can also include control module U3, and control module U3 is arranged in mould
In the case that an input pin of quasi- switching switch U1 is connect with output pin, other inputs of control analog switch U1
Pin is connect with ground terminal GND.For example, in the case where input pin in11 is connect with output pin out11, control module U3
Control input pin in12 is connect with ground terminal GND.In the case where input pin in12 is connect with output pin out11, control
Molding block U3 controls input pin in11 is connect with ground terminal GND.
Do not connect with output pin out11 input pin input signal voltage be higher than supply voltage when, not with
The input pin of output pin out11 connections can leak electricity, and interference is generated to the signal of output pin out11 outputs.In the signal
In the case that switching circuit transmission is audio signal, the input pin electric leakage not connect with output pin out11 can cause to go here and there
The problem of sound.
The input pin not connect with output pin out11 is connect with ground terminal GND by control module U3 so that not
The input pin being connect with output pin out11 is low level, so that it may to occur the case where preventing its electric leakage.Switch in the signal
In the case that circuit transmission is audio signal, it can cause to avoid the input pin electric leakage not connect with output pin out11
Crosstalk problem.
For example, when it is high level to control signal, the first input pin in11 and output pin of analog switch U1
Out11 connections, when it is low level to control signal, the second input pin in12 and output pin of analog switch U1
In the case of out11 connections, control module U3 can be include as shown in Figure 4 the first NPN triode Q1, tri- poles the 2nd NPN
Pipe Q2 and PNP triode Q3.First input pin in11 is connect through the first NPN triode Q1 with ground terminal GND, i.e. the first NPN
The emitter of triode Q1 is connect with ground terminal GND, and the collector of the first NPN triode Q1 and the first input pin in11 connect
It connects.Second input pin in12 is connect through the second NPN triode Q2 with ground terminal GND, i.e. the emitter of the second NPN triode Q2
It is connect with ground terminal GND, the collector of the second NPN triode Q2 is connect with the second input pin in12.First NPN triode Q1
Base stage connect with the controlling switch Ctrl1 of analog switch U1.The base stage of PNP triode Q3 connects with controlling switch Ctrl1
It connects.The base stage of second NPN triode Q2 is connect through PNP triode with power end VCC, i.e. the emitter of PNP triode Q3 and electricity
Source VCC connections, the collector of PNP triode Q3 are connect with the base stage of the second NPN triode Q2.
When it is high level to control signal, the first input pin in11 and output pin out11 of analog switch U1
Connection, output pin out11 export the first current signal to output end out1, the second NPN triode Q2 conductings, PNP triode
Q3 ends, and the cut-off of the first NPN triode Q1 connects, the first input pin between the second input pin in12 and ground terminal GND
In11 is separated with ground terminal GND's.When it is low level to control signal, the second input pin in12 of analog switch U1
It is connect with output pin out11, output pin out11 exports the second current signal to output end out1, the second NPN triode Q2
Cut-off, PNP triode Q3 conductings, the conducting of the first NPN triode Q1 connect between the first input pin in11 and ground terminal GND,
Second input pin in12 and ground terminal GND's is separated.In this way, circuit structure through this embodiment, is achieved that control
Module U3 controls mould in the case where one of analog switch U1 input pins are connect with output pin out11
The function that another input pin of quasi- switching switch U1 is connect with ground terminal GND.
Further, as shown in figure 4, control module U3 can also include resistance R7, resistance R8, diode D1 and two poles
Pipe D2.Resistance R7 and diode D1 be connected in series in PNP triode Q1 collector and the first NPN triode Q1 base stage it
Between, the anode of diode D1 is connect with the collector of PNP triode Q3.Resistance R8 and diode D2 is connected in series in tri- poles PNP
Between the base stage of pipe Q3 and the base stage of the second NPN triode Q2, the anode of diode D2 is connect with the base stage of PNP triode Q3.
As shown in figure 3, the signal switching circuit can also include the first biasing module U41 and the second biasing module U42.The
One biasing module U41 is arranged to that the operating point of the first input pin in11 is arranged；Second biasing module U42 is arranged to be arranged
The operating point of second input pin in12.
As shown in figure 4, the first biasing module U41 may include first resistor R1, second resistance R2 and 3rd resistor R3.The
One resistance R1 and second resistance R2 are connected in series between power end VCC and ground terminal GND, and it is defeated that 3rd resistor R3 is connected to first
Enter to hold between the potential point P1 between in1 and first resistor R1 and second resistance R2.
Further, the second biasing module U42 may include the 4th resistance R4, the 5th resistance R5 and the 6th resistance R6.The
Four resistance R4 and the 5th resistance R5 are connected in series between power end VCC and ground terminal GND.It is defeated that 6th resistance R6 is connected to second
Enter to hold between the potential point P2 between in2 and the 4th resistance R4 and the 5th resistance R5.
On this basis, first resistor R1 and the 4th resistance R4 can be provided by same resistance device, second resistance R2
Can be provided by same resistance device with the 5th resistance R5.
The present invention also provides a kind of electronic equipment, including signal switching circuit above-mentioned.
Further, the electronic equipment further include electric current input cake core, the electric current input cake core input pin with
Output end out1 connections.Wherein, electric current input cake core is the chip that input signal is current signal.For example, the electric current inputs
Cake core can be the imported modulus conversion chip of electric current.
The various embodiments described above primary focus describes difference from other examples, but those skilled in the art should be clear
Chu, the various embodiments described above can be used alone or be combined with each other as needed.
Although some specific embodiments of the present invention are described in detail by example, the skill of this field
Art personnel it should be understood that example above merely to illustrating, the range being not intended to be limiting of the invention.The skill of this field
Art personnel are it should be understood that can without departing from the scope and spirit of the present invention modify to above example.This hair
Bright range is defined by the following claims.
Claims (10)
1. a kind of signal switching circuit, which is characterized in that first including analog switch, for inputting first voltage signal
Input terminal, the second input terminal for inputting second voltage signal, for output current signal output end, be used for input control
The control terminal and first voltage current conversion module and second voltage current conversion module of signal；The first voltage electric current turns
Mold changing block is arranged to the first voltage signal is converted to that the first current signal is sent to the analog switch the
One input pin；The second voltage current conversion module is arranged to the second voltage signal being converted to the second electric current letter
Number it is sent to the second input pin of the analog switch；The output pin of the analog switch and the output end
Connection；The control terminal is connect with the controlling switch of the simulation switching chip, and the analog switch is arranged to basis
The control signal is by first current signal received or second current signal transfer to the output pin.
2. signal switching circuit according to claim 1, which is characterized in that the first voltage current conversion module and institute
Second voltage current conversion module is stated to be provided by resistance.
3. signal switching circuit according to claim 1, which is characterized in that the signal switching circuit further includes control mould
Block, the control module are arranged to the feelings being connect with output pin in one of analog switch input pin
Under condition, another input pin for controlling the analog switch is connect with ground terminal.
4. signal switching circuit according to claim 3, which is characterized in that the control module includes PNP triode,
One NPN triode and the second NPN triode, first input pin connect through first NPN triode and the ground terminal
It connects, second input pin is connect through second NPN triode with the ground terminal, the base of first NPN triode
Pole is connect with the controlling switch of the analog switch, and the base stage of the PNP triode is connect with the controlling switch, described
The base stage of second NPN triode is connect through the PNP triode with power end.
5. signal switching circuit according to claim 1, which is characterized in that the signal switching circuit further includes first inclined
Module and the second biasing module are set, first biasing module is arranged to that the operating point of first input pin is arranged；Institute
The second biasing module is stated to be arranged to that the operating point of second input pin is arranged.
6. signal switching circuit according to claim 5, which is characterized in that first biasing module includes the first electricity
Resistance, second resistance and 3rd resistor, the first resistor and the second resistance are connected in series between the powered end and the ground end,
The 3rd resistor be connected to the potential point between the first input end and the first resistor and the second resistance it
Between.
7. signal switching circuit according to claim 6, which is characterized in that second biasing module includes the 4th electricity
Resistance, the 5th resistance and the 6th resistance, the 4th resistance and the 5th resistance are connected in series between power end and ground terminal,
6th resistance be connected to the potential point between second input terminal and the 4th resistance and the 5th resistance it
Between.
8. signal switching circuit according to claim 7, which is characterized in that the first resistor and the 4th resistance by
Same resistance device provides, and the second resistance and the 5th resistance are provided by same resistance device.
9. a kind of electronic equipment, which is characterized in that include the signal switching circuit according to any one of claim 1-8.
10. electronic equipment according to claim 9, which is characterized in that the electronic equipment further includes electric current input core
The input pin of piece, the electric current input cake core is connect with the output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810501602.3A CN108769873B (en) | 2018-05-23 | 2018-05-23 | Signal switching circuit and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810501602.3A CN108769873B (en) | 2018-05-23 | 2018-05-23 | Signal switching circuit and electronic equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108769873A true CN108769873A (en) | 2018-11-06 |
| CN108769873B CN108769873B (en) | 2020-08-25 |
Family
ID=64005003
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810501602.3A Active CN108769873B (en) | 2018-05-23 | 2018-05-23 | Signal switching circuit and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108769873B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110868062A (en) * | 2019-10-18 | 2020-03-06 | 珠海格力电器股份有限公司 | Novel half-bridge driving circuit and control method thereof |
| CN110879084A (en) * | 2019-12-19 | 2020-03-13 | 江阴信和电力仪表有限公司 | High-precision measuring circuit capable of switching vibration intensity and amplitude |
| CN111800278A (en) * | 2020-07-03 | 2020-10-20 | 河南万国科技股份有限公司 | Network switcher |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60121815A (en) * | 1983-12-05 | 1985-06-29 | Fujitsu Ltd | Analog switch circuit |
| CN1889362A (en) * | 2005-06-29 | 2007-01-03 | 陈有毅 | Several single-wireline switch technique resolving plan utilizng AC, DC conversion |
| CN201656778U (en) * | 2010-04-02 | 2010-11-24 | 日银Imp微电子有限公司 | System for linearly adjusting slope of slope compensation voltage |
| US20120025796A1 (en) * | 2010-07-27 | 2012-02-02 | Volterra Semiconductor Corporation | Sensing and feedback with enhanced stability in a current mode control voltage regulator |
| CN103001480A (en) * | 2012-12-20 | 2013-03-27 | 西安电子科技大学 | Soft starting circuit applied in buck type direct current (DC)-DC switch power supply |
| CN203116755U (en) * | 2013-03-26 | 2013-08-07 | 哈尔滨职业技术学院 | Integrative sensor and transducer combination |
-
2018
- 2018-05-23 CN CN201810501602.3A patent/CN108769873B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60121815A (en) * | 1983-12-05 | 1985-06-29 | Fujitsu Ltd | Analog switch circuit |
| CN1889362A (en) * | 2005-06-29 | 2007-01-03 | 陈有毅 | Several single-wireline switch technique resolving plan utilizng AC, DC conversion |
| CN201656778U (en) * | 2010-04-02 | 2010-11-24 | 日银Imp微电子有限公司 | System for linearly adjusting slope of slope compensation voltage |
| US20120025796A1 (en) * | 2010-07-27 | 2012-02-02 | Volterra Semiconductor Corporation | Sensing and feedback with enhanced stability in a current mode control voltage regulator |
| CN103001480A (en) * | 2012-12-20 | 2013-03-27 | 西安电子科技大学 | Soft starting circuit applied in buck type direct current (DC)-DC switch power supply |
| CN203116755U (en) * | 2013-03-26 | 2013-08-07 | 哈尔滨职业技术学院 | Integrative sensor and transducer combination |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110868062A (en) * | 2019-10-18 | 2020-03-06 | 珠海格力电器股份有限公司 | Novel half-bridge driving circuit and control method thereof |
| CN110879084A (en) * | 2019-12-19 | 2020-03-13 | 江阴信和电力仪表有限公司 | High-precision measuring circuit capable of switching vibration intensity and amplitude |
| CN111800278A (en) * | 2020-07-03 | 2020-10-20 | 河南万国科技股份有限公司 | Network switcher |
| CN111800278B (en) * | 2020-07-03 | 2023-04-25 | 河南万国科技股份有限公司 | Network switcher |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108769873B (en) | 2020-08-25 |
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