CN103885348B - Switch device with isolation feature and method for improving isolation feature of switch device - Google Patents
Switch device with isolation feature and method for improving isolation feature of switch device Download PDFInfo
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- CN103885348B CN103885348B CN201410083321.2A CN201410083321A CN103885348B CN 103885348 B CN103885348 B CN 103885348B CN 201410083321 A CN201410083321 A CN 201410083321A CN 103885348 B CN103885348 B CN 103885348B
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Abstract
The invention discloses a switch device with an isolation feature and a method for improving the isolation feature of the switch device. The switch device with the isolation feature comprises a switch unit and a control unit, wherein the control unit is connected with a power supply end and is connected with the switch unit through a control circuit and a power supply circuit. The control unit at least comprises one voltage stabilizing unit, and the voltage stabilizing unit is respectively connected with the power supply end and the power supply circuit of the switch unit. When the switch unit is idle, the voltage stabilizing unit provides an isolation voltage to the switch unit, and thus the isolation feature of the switch device in the idle state can be improved effectively.
Description
Technical field
The present invention relates to a kind of switching device with isolation characteristic and the method for improving its isolation characteristic, can effectively improve
The isolation characteristic of switching device.
Background technology
Fig. 1 is referred to, is the block diagram of the existing less radio-frequency front end (RF Front-end) with switch element.
Less radio-frequency front end (RF Front-end) 10 switchs to launch and receive wireless signal including an antenna element 11,
Unit 13, at least a receiving circuit 15, a transmitter unit 17 and a control unit 19, wherein the connecting valve unit of control unit 19
13 and transmitter unit 17, and to be powered to switch element 13, and switching, it is turned on and off switch element 13.
In practical application, control unit 19 passes through supply line 191 and the connecting valve unit 13 of control circuit 193, wherein
Control unit 19 provides a supply voltage Vcc by supply line 191 to switch element 13, and by control circuit 193 to opening
Close unit 13 and transmit a control signal, thereby switching switch element 13.
The changeable switch element 13 of control unit 19 in the present embodiment so that antenna element 11 is connected by switch element 13
Transmitter unit 17 is connect, then transmitter unit 17 can send a signal to antenna element 11 via switch element 13, and by antenna element
11 wirelessly sending signals.Certainly the also changeable switch element 13 of control unit 19 so that antenna element 11 is by opening
The connection receiving circuit 15 of unit 13 is closed, then the wireless signal of reception can be sent to and connect by antenna element 11 via switch element 13
Take-up road 15.Less radio-frequency front end 10 thus just can be caused to carry out the reception or transmitting of wireless signal.
During the reception or transmitting for not carrying out wireless signal, less radio-frequency front end 10 will enter idle state,
Now control unit 19 will not provide supply voltage Vcc to switch element 13, to save the current drain of idle state, and
With the isolated antennas unit 11 of switch element 13, receiving circuit 15 and transmitter unit 17.
The content of the invention
One purpose of the present invention, is to provide a kind of method for improving switching device isolation characteristic, mainly in switching device
Into after idle state, provide one to switch element and completely cut off voltage, wherein isolation voltage is normal less than or equal to switching device
Operating voltage.By providing isolation voltage to switch element, can cause switching device and/or switch element have preferably every
Exhausted characteristic, and can effectively prevent high-frequency signal from mutually transmitting between several end points of the switch element of idle state.
One purpose of the present invention, is to provide a kind of method for improving switching device isolation characteristic, can be applicable to and is provided with
The less radio-frequency front end (RF Front-end) of switching device or wireless transceiver (Transceiver), when before less radio-frequency
End do not carry out wireless signal reception or transmitting when, or in idle (Standby) state when, control unit can be to switch element
Isolation voltage is provided, high-frequency signal can be avoided across switch element, and pass between antenna element, transmission path and RX path
Pass.
One purpose of the present invention, is to provide a kind of switching device with isolation characteristic, including a switch element and one
Control unit, wherein control unit at least include a voltage regulation unit.Voltage regulation unit one end connects power end, and the other end then passes through
At least supply line's connecting valve unit.When switching device enters idle state, voltage regulation unit can be provided to switch element
One isolation voltage, thereby with the isolation characteristic of raising switch element.
One purpose of the present invention, is to provide a kind of switching device with isolation characteristic, including a switch element and one
Control unit, wherein control unit include a voltage regulation unit and an at least pressure unit.One end of voltage regulation unit and pressure unit
Connect a power end, and the other end then passes through at least supply line's connecting valve unit.When switching device enters idle state
When, power end can provide one and completely cut off voltage via pressure unit and supply line to switch element, thereby improving switch element
Isolation characteristic.
One purpose of the present invention, is to provide a kind of switching device with isolation characteristic, can be incorporated into before less radio-frequency
Inside end or wireless transceiver, when less radio-frequency front end or wireless transceiver do not carry out the reception of wireless signal or transmitting, control
Unit processed can to switch element provide one completely cut off voltage, can thereby prevent high-frequency signal across switch element, and antenna element,
Transmit between transmission path and RX path.
To reach above-mentioned purpose, the present invention provides a kind of switching device with isolation characteristic, including：One switch element；
One control unit, connects power end, and by an at least control circuit connecting valve unit, including；One voltage regulation unit, connection electricity
Source, and by least supply line's connecting valve unit, to switch element a supply voltage is provided；An at least blood pressure lowering list
Unit, is electrically connected with power end or supply line；One switch unit, connects pressure unit, and switches pressure unit and power supply circuits
Between electric connection.
Additionally, the present invention also provides a kind of method of the isolation characteristic of raising switching device, wherein switching device includes one
Switch element and a control unit, control unit to switch element provides a supply voltage, and switch element includes multiple connections
Circuit, comprises the following steps：Switch element enters an idle state, and wherein idle state is multiple connection lines of switch element
It is not connected with each other；And an isolation voltage is provided switch element, wherein isolation voltage is less than or equal to supply voltage.
In the present invention has the embodiment of switching device one of isolation characteristic, wherein switch element connects including at least one first
Link, at least one second connection line and at least one the 3rd connection line.
In the present invention has the embodiment of switching device one of isolation characteristic, wherein the first connection line passes through switch element
Connect the second connection line or the 3rd connection line.
In the present invention has the embodiment of switching device one of isolation characteristic, wherein the first connection line connects an antenna list
Unit；Second connection line is a transmission path；And the 3rd connection line be a RX path.
In the present invention has the embodiment of switching device one of isolation characteristic, wherein the quantity of pressure unit is multiple, and
It is connected in series to multiple pressure units, and the pressure unit connection power end and earth terminal of multiple series connection, and supply lines
Road is electrically connected between the pressure unit of multiple series connection.
In the present invention has the embodiment of switching device one of isolation characteristic, wherein power end passes through an at least pressure unit
One is provided to switch element and completely cut off voltage, and completely cut off voltage be less than or equal to supply voltage.
In the embodiment of method one that the present invention improves switching device isolation characteristic, wherein control unit connects power end,
And included by an at least control circuit connecting valve unit, and control unit：One voltage regulation unit, connects power end, and passes through
At least supply line's connecting valve unit, to switch element supply voltage is provided；An at least pressure unit, is electrically connected with power supply
End or supply line；One switch unit, connects pressure unit, and switches the electric connection between pressure unit and power supply circuits.
In the embodiment of method one that the present invention improves switching device isolation characteristic, wherein control unit connects a power supply
End, and by an at least control circuit connecting valve unit, and control unit includes a voltage regulation unit, connects power end, and lead to
At least supply line's connecting valve unit is crossed, wherein voltage regulation unit provides supply voltage to switch element.
It is further comprising the steps of in the embodiment of method one that the present invention improves switching device isolation characteristic：Change voltage stabilizing
Unit or the supply voltage of control unit output so that voltage regulation unit or control unit provide isolation voltage to switch element, and
Isolation voltage is less than or equal to supply voltage.
It is further comprising the steps of in the embodiment of method one that the present invention improves switching device isolation characteristic：Close voltage stabilizing
Unit so that control unit stops providing supply voltage to switch element.
It is further comprising the steps of in the embodiment of method one that the present invention improves switching device isolation characteristic：Switching switching
Unit so that pressure unit is electrically connected with supply line, and provides isolation voltage to switch unit by supply line.
It is further comprising the steps of in the embodiment of method one that the present invention improves switching device isolation characteristic：Switching device
Into an idle state.
Describe the present invention below in conjunction with the drawings and specific embodiments, but it is not as a limitation of the invention.
Description of the drawings
The block diagram of the existing less radio-frequency front ends with switch element of Fig. 1；
Fig. 2 is the connection diagram that the present invention has the preferably embodiment of switching device one of isolation characteristic；
Fig. 3 is the connection diagram that the present invention has the preferably another embodiment of switching device of isolation characteristic；
Fig. 4 is the circuit diagram of the embodiment of switch element of the present invention；
Fig. 5 is the connection for having the preferably embodiment of less radio-frequency front end one of the switching device of isolation characteristic using the present invention
Schematic diagram；
Fig. 6 is the company for having the preferably another embodiment in less radio-frequency front end of the switching device of isolation characteristic using the present invention
Connect schematic diagram；And
Fig. 7 is the connection diagram that the present invention has the preferably another embodiment of switching device of isolation characteristic.
Wherein, reference
The antenna element of 10 less radio-frequency front end 11
The receiving circuit of 13 switch element 15
The control unit of 17 transmitter unit 19
The control circuit of 191 supply line 193
The switch element of 20 switching device 21
The connection line of 211 first connection line 213 second
The supply line of 215 the 3rd connection line 221
The control unit of 223 control circuit 23
The pressure unit of 231 voltage regulation unit 233
The switch unit of 234 pressure unit 235
24 power ends
The less radio-frequency front end of 30 switching device 300
The connection line of 31 switch element 311 first
The connection line of 313 second connection line 315 the 3rd
The control circuit of 321 supply line 323
The voltage regulation unit of 33 control unit 331
The pressure unit of 333 pressure unit 334
The power end of 335 switch unit 34
The impedance matching unit of 35 antenna element 36
37 transmitter units
The switch element of 40 switching device 41
The connection line of 411 first connection line 413 second
The supply line of 415 the 3rd connection line 421
The control unit of 423 control circuit 43
The power end of 431 voltage regulation unit 44
Specific embodiment
The structural principle and operation principle of the present invention are described in detail below in conjunction with the accompanying drawings：
Fig. 2 is referred to, is the connection diagram that the present invention has the preferably embodiment of switching device one of isolation characteristic.As schemed
Shown, the switching device 20 described in the embodiment of the present invention includes a switch element 21 and a control unit 23, wherein control unit
23 one power ends 24 of connection, and by an at least supply line 221 and the connecting valve unit 21 of an at least control circuit 223.
Control unit 23 connects power end 24, and provides a supply voltage to switch element 21 by supply line 221
Vcc.In addition control unit 23 by the connecting valve unit 21 of control circuit 223, and can provide an at least control to switch element 21
Signal processed, with the operator scheme of controlling switch unit 21.
In embodiments of the present invention, control unit 23 include a voltage regulation unit 231, an at least pressure unit 233 and all
Unit 235 is changed, wherein voltage regulation unit 231 can drop manostat (Linear Low Dropout Voltage for linear low voltage
Regulator、LDO).Voltage regulation unit 231 connects power end 24, and by the connecting valve unit 21 of supply line 221, and via
Supply line 221 to switch element 21 provides supply voltage Vcc.
Pressure unit 233 is electrically connected with power end 24 and supply line 221 so that pressure unit 233 and voltage regulation unit 231
Arrange in parallel.In an embodiment of the present invention, pressure unit 233 connects a switch unit 235, and single by switching
Unit 235 switches the electric connection of pressure unit 233 and the power end of supply line 221, and can switch blood pressure lowering by switch unit 235
Unit 233 and the electric connection state of supply line 221.
Switch element 21 may include multiple connection lines, and in an embodiment of the present invention, switch element 21 includes at least one
First connection line 211, at least one second connection line 213 and at least one the 3rd connection line 215, and switch element can be passed through
21 the first connection lines 211 of connection and the second connection line 213, or the first connection line 211 is connected by switch element 21
And the 3rd connection line 215.So that signal can be transmitted between the first connection line 211 and the second connection line 213, or
Transmit between first connection line 211 and the 3rd connection line 215.For example the first connection line 211 can connect an antenna element
(not shown)；Second connection line 213 can be transmitting circuit；And the 3rd connection line 215 can be then receiving circuit.
During using switching device 20, switch unit 235 will be closed (off) so that pressure unit 233 not with
Voltage regulation unit 231 and/or supply line 221 are electrically connected.Now voltage regulation unit 231 is single to switch via supply line 221
Unit 21 provides stable supply voltage Vcc, to maintain the normal operation of switch element 21.
When less radio-frequency front end (RF Front-end) or wireless transceiver (Transceiver) do not carry out wireless signal
Reception or during transmitting, switch element 21 can be caused to enter idle state, for example control unit 23 can be by the general of control circuit 223
Switch element 21 switches to idle state, wherein idle state not to be connected with each other for each connection line of switch element 21, and/
Or switch element 21 does not carry out the transmission of signal, such as not by the connection of switch element 21 first connection line 211 and the second company
The connection line 215 of link 213 or the 3rd, can cause switching device 20 to enter idle state.Now switch unit 235 will be opened
Open (on) so that pressure unit 233 is connected with supply line 211, and voltage regulation unit 231 then can be closed so that control unit
23 stop providing supply voltage Vcc to switch element 21.
Pressure unit 233 connects power end 24 and supply line 211, and the voltage of power end 24 is by pressure unit 233
After will produce pressure drop, and form an isolation voltage Viso, the selection of the magnitude of voltage of this isolation voltage Viso is to allow switch element
21 can be under (off) state of closing so that good isolation (port to port are maintained between each circuit of switch element 21
Isolation), it is to avoid have signal to transmit between each circuit, wherein isolation voltage Viso can be less than or equal to supply voltage
Vcc.Isolation voltage Viso is sent to switch element 21 via supply line 221, can thereby improve switch element 21 at each
Isolation (Isolation) between connection line.
In an embodiment of the present invention, the size of voltage Viso is completely cut off between 0.5V to 1V, this voltage range is only
For one embodiment of the invention, the restriction of the interest field of the present invention is not intended as.
Please refer to shown in Fig. 1, in an idle state, control unit 19 will not be single to switch for existing switch element 13
Unit 13 provides supply voltage Vcc, or supply voltage Vcc switched to into 0V, and with the isolated antennas unit 11 of switch element 13, connect
Take-up road 15 and transmitter unit 17.But in practical application, in the switch element 13 of idle state, if not providing power supply electricity
Press to switch element, the then path that can not effectively completely cut off between antenna element 11, receiving circuit 15 and transmitter unit 17 so that
Partial signal (signal of such as high frequency) still by switch element 13, and in antenna element 11, receiving circuit 15 and/or can be sent out
Penetrate between unit 17 and transmit.In comparison, switching device of the present invention 20 in an idle state, the blood pressure lowering of control unit 23
Unit 233 can provide isolation voltage Viso by supply line 221 to switch element 21 so that switch element 21 can effectively completely cut off
Signal between first connection line 211, the second connection line 213 and the 3rd connection line 215, increases switch element at each
Isolation (Isolation) between connection line.
In an alternative embodiment of the invention, please refer to shown in Fig. 3, isolation voltage (Viso) can be come by the partial pressure of element
Produce, for example, can be produced by the partial pressure of pressure unit 233 and pressure unit 234, wherein pressure unit 233 and pressure unit
234 can be resistance or diode or transistor, and element that also can be how different by more than is constituted.Pressure unit 233 and pressure unit
234 connect in a series arrangement, one end connection power end 24 of pressure unit 233, the other end connection blood pressure lowering list of pressure unit 233
One end of unit 234, the other end ground connection of pressure unit 234, and supply line 221 is then electrically connected with drop by switch unit 235
Between pressure unit 233 and pressure unit 234.The voltage of power end 24 through pressure unit 233 and the partial pressure of pressure unit 234,
Form an isolation voltage Viso and be connected with supply line 221 by switch unit 235, and provide suitably to switch element 21
The isolation voltage Viso of size.
Please refer to shown in Fig. 4, in an embodiment of the present invention switch element 21 can be single-pole double-throw switch (SPDT) unit
(Single-Pole Double-Throw Switch, SDPT), is not limited in opening for this form in practical application certainly
Close unit.Switch element 21 includes a first transistor M1, a transistor seconds M2, third transistor M3, one the 4th crystal
Pipe M4, one first connection line 211, one second connection line 213 and one the 3rd connection line 215.
The first transistor M1 is located between the first connection line 211 and the second connection line 213, and transistor seconds M2 is then
Between the first connection line 211 and the 3rd connection line 215, wherein the first transistor M1 connects one first control voltage
V1, and transistor seconds M2 then connects one second control voltage V2, and can respectively by the first control voltage V1 and the second control
Voltage V2 control the first transistor M1's and transistor seconds M2 is turned on and off.
Third transistor M3 is electrically connected with the first transistor M1, and connects one the 3rd control voltage V3, the 4th transistor M4
Transistor seconds M2 is then electrically connected with, and connects one the 4th control voltage V4, and can be electric by tertiary voltage V3 and the 4th respectively
Pressure V4 control third transistor M3 and the 4th transistor M4 are turned on and off.Such as the 3rd control voltage V3 can be the first control
The backward voltage of voltage V1, and the 4th control voltage V4 can be then the backward voltage of the second control voltage V2.
In an embodiment of the present invention, (on) the first transistor M1 and the 4th transistor M4 can be opened, and closes (off)
Two-transistor M2 and third transistor M3, to connect the first connection line 211 and the second connection line 213.In addition also can close
(off) the first transistor M1 and the 4th transistor M4, and (on) transistor seconds M2 and third transistor M3 are opened, to connect
One connection line 211 and the 3rd connection line 215.
When switch element 21 enters idle state, (off) the first transistor M1 and transistor seconds M2 can be closed, and to
Third transistor M3 and the 4th transistor M4 provide isolation voltage Viso, the selection of this isolation magnitude of voltage, are so that the 3rd crystal
Pipe M3 and the 4th transistor M4 conductings (on), to increase switch element 21 in the isolation (Isolation) of idle state, wherein
Isolation voltage Viso can be less than or equal to supply voltage Vcc, for example, can cause the 3rd control voltage V3 and the 4th control voltage
V4 is equal to isolation voltage Viso.
Fig. 5 is referred to, is the enforcement of less radio-frequency front end one that there is the preferably switching device of isolation characteristic using the present invention
The connection diagram of example.As illustrated, the switching device 30 described in the embodiment of the present invention includes a switch element 31 and a control
Unit 33, wherein control unit 33 connect a power end 34, and by least a supply line 321 and at least a control circuit
323 connecting valve units 31.
Control unit 33 connects power end 34, and provides a supply voltage to switch element 31 by supply line 321
Vcc.In addition control unit 33 can provide an at least control signal, and controlling switch by control circuit 323 to switch element 31
The operator scheme of unit 31.
In embodiments of the present invention, control unit 33 include a voltage regulation unit 331, an at least pressure unit 333 and all
Unit 335 is changed, wherein voltage regulation unit 331 can drop manostat (Linear Low Dropout Voltage for linear low voltage
Regulator、LDO)。
Voltage regulation unit 331 connects power end 34, and by the connecting valve unit 31 of supply line 321.Pressure unit 333 connects
Meet power end 34 and supply line 321 so that pressure unit 333 and voltage regulation unit 331 are arranged in parallel.In the present invention
In one embodiment, pressure unit 333 can connect supply line 321 or power end 34 via switch unit 335, and with switch unit
335 switching pressure units 333 and the electric connection state of supply line 321.
Switch element 31 may include multiple connection lines, and such as switch element 31 may include at least one first connection line
311st, multiple second connection lines 313 and multiple 3rd connection lines 315.
In an embodiment of the present invention, switching device 30 can be applicable on less radio-frequency front end 300, wherein the first connecting line
Road 311 is can to connect an antenna element 35；Second connection line 313 can be transmitting circuit, and connect a transmitter unit 37, or
Transmitter unit 37 is connected by an impedance matching unit 36；And the 3rd connection line 315 is then receiving circuit.
In practical application, switch element 31 can switch at least one second connection line 313 so that the first connection line
311 connect at least one second connection line 313 by switch unit 31, and can be by the signal of transmitter unit 37 via the second connection
Circuit 313, the connection line 311 of switch unit 31 and first are sent to antenna element 35, thereby can be with less radio-frequency front end 300
Transmitting wireless signal.
In addition switch element 31 also can switch at least one the 3rd connection line 315 so that the first connection line 311 passes through
Switch unit 31 connects at least one the 3rd connection line 315, and can be by the received signal of antenna element 35 via the first connection
Circuit 311 and switch unit 31 are sent to the 3rd connection line 315, thereby can receive wireless communication with less radio-frequency front end 300
Number.
When less radio-frequency front end 300 does not carry out the reception of wireless signal or transmitting, for example less radio-frequency front end 300 is not entered
When the transmitting or reception of row wireless signal, switching device 30 can enter idle state, and now switch unit 335 will be opened
(on) so that pressure unit 333 is connected with supply line 311, and voltage regulation unit 331 is closed.
Pressure unit 333 connects power end 34 and supply line 321, and the voltage of power end 24 is by pressure unit 333
After will produce pressure drop, and form an isolation voltage Viso, the setting of the magnitude of voltage of this isolation voltage Viso is to allow switch element
Can be under (off) state of closing so that good isolation (port to port isolation) is maintained between each circuit, it is to avoid
There is signal to transmit between each circuit, wherein isolation voltage Viso can be less than or equal to supply voltage Vcc, and completely cut off voltage
Viso can be sent to switch element 31 via supply line 321, to improve the isolation characteristic of switch element 31.It is real in the present invention one
In applying example, completely cut off the size of voltage Viso between 0.5V to 1V, this voltage range is only one embodiment of the invention, not
As the restriction of the interest field of the present invention.
In an alternative embodiment of the invention, please refer to shown in Fig. 6, isolation voltage (Viso) can be by multiple series elements
Partial pressure producing, for example can be produced by the partial pressure of pressure unit 333 and pressure unit 334, wherein pressure unit 333 and
334 can be resistance or diode or transistor, also multiple different elements can constitute by more than.Pressure unit 333 and blood pressure lowering list
Unit 334 connects in a series arrangement, one end connection power end 34 of pressure unit 333, the other end connection blood pressure lowering of pressure unit 333
One end of unit 334, the other end ground connection of pressure unit 334, and supply line 321 then connects blood pressure lowering by switch unit 335
Between unit 333 and pressure unit 334.The voltage of power end 34 is through pressure unit 333 and the partial pressure of pressure unit 334, shape
It is connected with supply line 321 into an isolation voltage Viso and by switch unit 335, and provides appropriate big to switch element 31
Little isolation voltage Viso.
Fig. 7 is referred to, is the connection diagram that there is the preferably embodiment of switching device one of isolation characteristic using the present invention.
As illustrated, the switching device 40 described in the embodiment of the present invention includes a switch element 41 and a control unit 43, wherein controlling
Unit 43 connects a power end 44, and by an at least supply line 421 and the connecting valve unit of an at least control circuit 423
41。
Control unit 43 connects power end 44, and provides a supply voltage to switch element 41 by supply line 421
Vcc.In addition control unit 43 by the connecting valve unit 41 of control circuit 423, and can provide an at least control to switch element 41
Signal processed, with the operator scheme of controlling switch unit 41.
In embodiments of the present invention, control unit 43 includes a voltage regulation unit 431, and wherein voltage regulation unit 431 can be linear
Low dropout voltage regulator (Linear Low Dropout Voltage Regulator, LDO).Voltage regulation unit 431 connects power end
44, and by the connecting valve unit 41 of supply line 421, and provide supply voltage to switch element 41 via supply line 421
Vcc。
In an embodiment of the present invention, when less radio-frequency front end (RF Front-end) or wireless transceiver
(Transceiver) when not carrying out the reception or transmitting of wireless signal, switch element 41 can be caused to enter idle state, for example, is controlled
Switch element 41 can be switched to idle state by unit processed 43 by control circuit 423, and wherein idle state is switch element 41
Each connection line be not connected with each other, and/or switch element 41 does not carry out the transmission of signal, for example, do not pass through switch element 41
Connect the first connection line 411 and the second connection line 413 or the 3rd connection line 415, switching device 40 can be caused to enter not busy
Configuration state.Now control unit 43 or voltage regulation unit 431 change its output voltage, and by the voltage of the Vcc voltage being originally presented
Directly adjustment becomes an isolation voltage Viso to value, the selection of the magnitude of voltage of this isolation voltage Viso, is to allow the switch element 41 can be
Under (off) state of closing so that good isolation (port to port are maintained between each circuit of switch element 41
Isolation), it is to avoid have signal to transmit between each circuit, wherein isolation voltage Viso can be less than or equal to supply voltage
Vcc.Isolation voltage Viso is sent to switch element 41 via supply line 421, can thereby improve switch element 41 at each
Isolation (Isolation) between connection line.
Connection described in the present invention refer to being directly connected between one or more objects or component or
Connect in succession, for example, one or more intermediate links can be there are between one or more objects or component.
Described in the system of description perhaps, must and wording and the non-invention such as change restriction.Description institute
The technical term for using is not the restriction of the present invention mainly to carry out the description of specific embodiment,.What description was used
Odd number measure word (such as one and this) also can be multiple, unless the content in description is expressly stated otherwise.Such as description institute
The device for referring to may include the combination of two or more devices, and the material that description is carried then may include
There is the mixing of many kinds of substance.
Certainly, the present invention can also have other various embodiments, ripe in the case of without departing substantially from spirit of the invention and its essence
Know those skilled in the art and work as and various corresponding changes and deformation, but these corresponding changes and change can be made according to the present invention
Shape should all belong to the protection domain of appended claims of the invention.
Claims (14)
1. it is a kind of with isolation characteristic switching device, including：One switch element；Characterized in that, the switching device also includes
One control unit, the control unit connects a power end, and connects the switch element by an at least control circuit, the control list
Unit includes；
One voltage regulation unit, connects the power end, and connects the switch element by an at least supply line, carries to the switch element
For a supply voltage；
An at least pressure unit, is electrically connected with the power end or the supply line；
One switch unit, connects the pressure unit, and switches the electric connection between the pressure unit and the power supply circuits.
2. it is according to claim 1 with the switching device for completely cutting off characteristic, it is characterised in that the switch element is included at least
One first connection line, at least one second connection line and at least one the 3rd connection line.
3. it is according to claim 2 with the switching device for completely cutting off characteristic, it is characterised in that first connection line passes through
The switch element connects second connection line or the 3rd connection line.
4. it is according to claim 2 with the switching device for completely cutting off characteristic, it is characterised in that first connection line connection
One antenna element；Second connection line is a transmission path；And the 3rd connection line be a RX path.
5. the switching device with isolation characteristic according to claim 2, it is characterised in that the quantity of the pressure unit is
It is multiple, and the plurality of pressure unit is connected in series to, and the pressure unit of the plurality of series connection connects the power end and connects
Ground terminal, and the supply line is electrically connected between the pressure unit of the plurality of series connection.
6. it is according to claim 1 with the switching device for completely cutting off characteristic, it is characterised in that the power end passes through this at least
One pressure unit provides one and completely cuts off voltage to the switch element, and the isolation voltage is less than or equal to the supply voltage.
7. a kind of to improve the method that switching device completely cuts off characteristic, the wherein switching device includes that a switch element and a control are single
Unit, the control unit to switch element provides a supply voltage, and the switch element includes multiple connection lines, and its feature exists
In the method for improving switching device isolation characteristic is comprised the following steps：
The switch element enter an idle state, wherein the idle state be the switch element the plurality of connection line it is not mutual
Connection；And
There is provided the switch element one and completely cut off voltage, the wherein isolation voltage is less than or equal to the supply voltage.
8. according to claim 7 to improve the method that switching device completely cuts off characteristic, the wherein control unit connects a power supply
End, and the switch element is connected by an at least control circuit, it is characterised in that the control unit includes：
One voltage regulation unit, connects the power end, and connects the switch element by an at least supply line, carries to the switch element
For the supply voltage；
An at least pressure unit, is electrically connected with the power end or the supply line；And
One switch unit, connects the pressure unit, and switches the electric connection between the pressure unit and the power supply circuits.
9. it is according to claim 8 to improve the method that switching device completely cuts off characteristic, it is characterised in that also including following step
Suddenly：Voltage regulation unit is opened in closing so that the control unit stops providing the supply voltage to the switch element.
10. it is according to claim 9 to improve the method that switching device completely cuts off characteristic, it is characterised in that also including following step
Suddenly：Switch the switch unit so that the pressure unit is electrically connected with the supply line, and by the supply line to the switching list
Unit provides the isolation voltage.
11. methods for improving switching device isolation characteristic according to claim 7, it is characterised in that the control unit is also
The switch element is connected by an at least control circuit, and the control unit is switched to the switch element by the control circuit
The idle state.
12. methods for improving switching device isolation characteristic according to claim 7, it is characterised in that the control unit connects
A power end is connect, and the switch element is connected by an at least control circuit, and the control unit includes a voltage regulation unit, connection
The power end, and the switch element is connected by an at least supply line, it is characterised in that the voltage regulation unit is to the switch element
The supply voltage is provided.
13. methods for improving switching device isolation characteristic according to claim 12, it is characterised in that also including following step
Suddenly：Change the supply voltage of the voltage regulation unit output so that the voltage regulation unit to the switch element provides the isolation voltage, and
The isolation voltage is less than or equal to the supply voltage.
14. methods for improving switching device isolation characteristic according to claim 12, it is characterised in that also including following step
Suddenly：The switching device is switched to the idle state by the control unit by the control circuit.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6069503A (en) * | 1998-03-11 | 2000-05-30 | Intel Corporation | High value FET resistors on a submicron MOS technology |
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| DE10062026A1 (en) * | 2000-12-13 | 2002-07-04 | Siemens Ag | Electronic switching device |
| CN202602535U (en) * | 2012-03-20 | 2012-12-12 | 立锜科技股份有限公司 | Switching type voltage-stabilizing circuit provided with multiple power input ends and relevant power converter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US6069503A (en) * | 1998-03-11 | 2000-05-30 | Intel Corporation | High value FET resistors on a submicron MOS technology |
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