CN110324062A - A kind of quick negative voltage switching circuit - Google Patents
A kind of quick negative voltage switching circuit Download PDFInfo
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- CN110324062A CN110324062A CN201910538816.2A CN201910538816A CN110324062A CN 110324062 A CN110324062 A CN 110324062A CN 201910538816 A CN201910538816 A CN 201910538816A CN 110324062 A CN110324062 A CN 110324062A
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- signal
- negative voltage
- level value
- operational amplifier
- switching circuit
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- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/401—Circuits for selecting or indicating operating mode
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/44—Transmit/receive switching
Abstract
The invention discloses a kind of quick negative voltage switching circuits, have predetermined level value V by setting outputrefThe reference voltage input terminal of reference voltage, output have predetermined level value VinDigital control signal digitial controller, and above-mentioned reference voltage input terminal and digitial controller are connected into operational amplifier, reversed enhanced processing is carried out to the digital control signal so as to be based on the reference voltage using operational amplifier, different negative voltage signals are generated, while different negative voltage signals is output to the grid voltage receiving end of radio frequency chip to realize the open and close control to receiving channel and/or transmission channel.By changing the exportable negative voltage with different voltages value of level value of the reference voltage, the control to different radio frequency chips is realized, it is seen then that the embodiment of the present application technical solution has the technical effect for expanding the negative voltage switching circuit scope of application.Meanwhile because operational amplifier reacts fast, at low cost, therefore also there are the technical effects such as switch speed is fast, operating efficiency is high.
Description
Technical field
The present invention relates to phased array antenna radio frequency chip control technology fields, switch more particularly to a kind of quick negative voltage
Circuit.
Background technique
Currently, needing to carry out nanosecond to the reiving/transmitting state of radio frequency chip other fast when active phase array antenna work
Speed switching, existing active phase array antenna transmitting-receiving switching control scheme mainly have following two ways: the first is using leakage
The mode that crush-cutting changes, which are to realize chip reception/transmission channel by the voltage swing in control chip drain electrode to control
Open or close, that there is the switching control precision to chip mode is low for this kind of mode, noise is big, easily cause chip therefore
The disadvantages of barrier, poor reliability；Second is by the way of grid voltage switching, and which is by often for the drain electricity of radio frequency chip
Then pressure controls the voltage swing on grid to control the pinch off of respective channel, so realize reception/transmission channel opening or
It closes.Switching mode is pressed relative to leakage, and it is excellent that the mode of grid voltage switching has that control accuracy is high, noise is small, reliability is high etc.
Gesture.However, the control voltage on grid is necessary for negative voltage, and digitial controller exports due to the operational characteristic of radio frequency chip
Control signal be generally the digital signal of positive voltage, the two can not be matched directly, it is therefore desirable to convert digital signal to pair
The negative voltage control signal answered.Further, since the switch speed requirement in phased array antenna system is very high, for
The signal path pattern switching rate request of radio frequency chip is also very high, and existing grid voltage switch speed can't reach phased array
The transceiver mode of antenna system high speed, which switches, to be required.
As it can be seen that the signal path that radio frequency chip exists in the prior art, which cut-offs control switch speed, cannot reach phased array
The technical issues of high-speed requirement of antenna system.
Summary of the invention
The application provides a kind of quick negative voltage switching circuit, to the radio frequency chip that solves to exist in the prior art
Signal path cut-offs the technical issues of control switch speed cannot reach the high-speed requirement of phased array antenna system.
This application provides a kind of quick negative voltage switching circuits, comprising:
Reference voltage input terminal, to export with predetermined level value VrefReference voltage；
Digitial controller, to export with predetermined level value VinDigital control signal；
Operational amplifier is separately connected with the reference voltage input terminal and the digitial controller, to based on described
Reference voltage carries out reversed enhanced processing, generation and V to the digital control signalrefAnd VinCorresponding negative voltage signal；
Radio frequency chip, including signal receiving channel or signal transmission channel, the signal receiving channel or signal transmitting are logical
The grid voltage receiving end in road is connect with the operational amplifier, to the negative voltage letter received based on the grid voltage receiving end
Number level value Vout control the opening and closing of the signal receiving channel or signal transmission channel.
Optionally, the switching circuit further include:
First resistor is arranged on the connecting path of the digitial controller and the operational amplifier, first electricity
Resistance has preset resistance value R1；
Second resistance, be arranged on the connecting path of the first resistor and the radio frequency chip and with the operation amplifier
Device is in parallel, and the second resistance has preset resistance value R2；
The operational amplifier, to be based on Vref、Vin、R1And R2Reversed enhanced processing is carried out to the digital control signal, it is raw
At corresponding negative voltage signal Vout。
Optionally, the operational amplifier, to be carried out at reversed amplification based on the first calculating formula to the digital control signal
Reason, generates corresponding negative voltage signal Vout, wherein first calculating formula are as follows:
Vout=(1+R2/R1)*Vref-(R2/R1)Vin。
Optionally, the first resistor and/or the second resistance are trimmable resistance.
Optionally, when the radio frequency chip includes signal transmission channel, the transmitting grid voltage of the signal transmission channel is connect
Receiving end is in opening state to control the signal transmission channel after receiving the negative voltage signal with the first level value
Otherwise state controls the transmission channel and is in close state；And/or
When the radio frequency chip includes signal receiving channel, the receiving grid of the signal receiving channel crimps receiving end, uses
It is in the open state to control the signal receiving channel after receiving the negative voltage signal with second electrical level value, otherwise control
The signal receiving channel is made to be in close state；
Wherein, first level value is different with the second electrical level value.
Optionally, the digitial controller includes:
CPU, and/or MCU, and/or FPGA, and/or DSP.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
Apply for that the technical solution in embodiment has predetermined level value V by setting outputrefThe reference voltage of reference voltage
Input terminal, output have predetermined level value VinDigital control signal digitial controller, and by above-mentioned reference voltage input terminal and number
Word controller connects operational amplifier, carries out so as to be based on the reference voltage using operational amplifier to the digital control signal
Reversed enhanced processing generates different negative voltage signals, and the grid voltage that different negative voltage signals is output to radio frequency chip is received
End is to realize the open and close control to receiving channel and/or transmission channel.Level value by changing the reference voltage can be defeated
The negative voltage of different voltages value is provided, realizes the control to different radio frequency chips, it is seen then that the embodiment of the present application technical solution
With the technical effect for expanding the negative voltage switching circuit scope of application.Simultaneously as operational amplifier, which has, reacts fast, at low cost
The advantages that, the technical solution in the embodiment of the present application can be made also have that switch speed is fast, operating efficiency is high, operation summary
The technical effects such as degree height.
Detailed description of the invention
Fig. 1 is a kind of structure chart of quick negative voltage switching circuit provided in an embodiment of the present invention；
Fig. 2 is a kind of circuit diagram of quick negative voltage switching circuit provided in an embodiment of the present invention.
Specific embodiment
The application provides a kind of quick negative voltage switching circuit, to the radio frequency chip that solves to exist in the prior art
Signal path cut-offs the technical issues of control switch speed cannot reach the high-speed requirement of phased array antenna system.
Technical solution in the embodiment of the present application is in order to solve the above technical problems, general thought is as follows:
Apply for that the technical solution in embodiment has predetermined level value V by setting outputrefThe reference voltage of reference voltage
Input terminal, output have predetermined level value VinDigital control signal digitial controller, and by above-mentioned reference voltage input terminal and number
Word controller connects operational amplifier, carries out so as to be based on the reference voltage using operational amplifier to the digital control signal
Reversed enhanced processing generates different negative voltage signals, and the grid voltage that different negative voltage signals is output to radio frequency chip is received
End is to realize the open and close control to receiving channel and/or transmission channel.Level value by changing the reference voltage can be defeated
The negative voltage of different voltages value is provided, realizes the control to different radio frequency chips, it is seen then that the embodiment of the present application technical solution
With the technical effect for expanding the negative voltage switching circuit scope of application.Simultaneously as operational amplifier, which has, reacts fast, at low cost
The advantages that, the technical solution in the embodiment of the present application can be made also have that switch speed is fast, operating efficiency is high, operation summary
The technical effects such as degree height.
Technical scheme is described in detail below by attached drawing and specific embodiment, it should be understood that the application
Specific features in embodiment and embodiment are the detailed description to technical scheme, rather than to present techniques
The restriction of scheme, in the absence of conflict, the technical characteristic in the embodiment of the present application and embodiment can be combined with each other.
The terms "and/or", only a kind of incidence relation for describing affiliated partner, indicates that there may be three kinds of passes
System, for example, A and/or B, can indicate: individualism A exists simultaneously A and B, these three situations of individualism B.In addition, herein
Middle character "/" typicallys represent the relationship that forward-backward correlation object is a kind of "or".
Embodiment one
Referring to FIG. 1, Fig. 2, the embodiment of the present application one provides a kind of quick negative voltage switching circuit, comprising:
Reference voltage input terminal 101, to export with predetermined level value VrefReference voltage；
Digitial controller 102, to export with predetermined level value VinDigital control signal；
Operational amplifier 103 is separately connected with the reference voltage input terminal and the digitial controller, to be based on institute
It states reference voltage and reversed enhanced processing, generation and V is carried out to the digital control signalrefAnd VinCorresponding negative voltage signal；
Radio frequency chip 104, including signal receiving channel or signal transmission channel, the signal receiving channel or signal transmitting
The grid voltage receiving end in channel is connect with the operational amplifier, to the negative voltage received based on the grid voltage receiving end
The level value V of signaloutControl the opening and closing of the signal receiving channel or signal transmission channel.
In the actual operation process, the number can be inputted by digitial controller by the mode of user or systemic presupposition
Signal is controlled, and the digital control signal can be in high level VH_DIGWith low level VL_DIGSwitch under two states, for example, the height
Level VH_DIGCan be several for 1.8V, 3.3V etc., and the low level VL_DIGIt can be 0V.The digital control signal is through operation
Corresponding negative voltage signal can be converted into after the amplification of amplifier reverse phase, that is to say, that different digital control signals, which can correspond to, to be turned
Turn to different negative voltage signals.The grid voltage receiving end of radio frequency chip can according to the different negative voltage signals received come pair
Signal reception/transmission channel should be controlled to open or close, it is possible thereby to realize the transmission channel to radio frequency chip and receive logical
Road carries out the switching control of transceiver mode respectively.And for needing the radio frequency chip of different negative value controls, it can be based on fortune
The reversed amplification principle of amplifier is calculated, by the level value V for changing the reference voltagerefSize, i.e., it is exportable have different electricity
The negative voltage of pressure value realizes the control to different radio frequency chips, it is seen then that the negative electricity crush-cutting in the embodiment of the present application technical solution
It changes circuit and is applicable to a variety of radio frequency chips, there is the technical effect for expanding the negative voltage switching circuit scope of application.Simultaneously as
Operational amplifier has many advantages, such as that reaction is fast, at low cost, and can make the technical solution in the embodiment of the present application also has switching
The technical effects such as speed is fast, operating efficiency is high, operation summary degree height.
Meanwhile the switching circuit in the embodiment of the present application further include:
First resistor is arranged on the connecting path of the digitial controller and the operational amplifier, first electricity
Resistance has preset resistance value R1；
Second resistance, be arranged on the connecting path of the first resistor and the radio frequency chip and with the operation amplifier
Device is in parallel, and the second resistance has preset resistance value R2；
The operational amplifier, to be based on Vref、Vin、R1And R2Reversed enhanced processing is carried out to the digital control signal, it is raw
At corresponding negative voltage signal Vout。
It, can be during control exports different negative voltage signals, further by changing R by above-mentioned setting1
And R2Value, cooperation adjusts the level value V of the reference voltagerefSize, can the number of output it is more and voltage value is different
Negative voltage signal, and then realize the effect controlled a greater variety of radio frequency chips.
Still further, the operational amplifier, reversely to be put based on the first calculating formula to the digital control signal
Big processing, generates corresponding negative voltage signal Vout, wherein first calculating formula are as follows:
Vout=(1+R2/R1)*Vref-(R2/R1)Vin。
In practical applications, it will usually need to arrange multiple radio frequency chips, while these radio frequencies in a communications system
The negative voltage signal level value of its control opening and closing of the signal transmission channel and signal receiving channel of chip may also be very close, number
The negative voltage signal precision of word controller output is slightly lower to will result in different signal transmission channel and the appearance of signal receiving channel
It is opened and closed obstacle or the uncomfortable consequence that cooperates.Therefore, the technical solution in the embodiment of the present application is based on by using above-mentioned calculating formula
Adjust Vref、Vin、R1And R2Value diversified negative voltage letter can be very easily generated in small range level value section
It number is controlled with the radio frequency chip channel to these substantial amounts, is improving the same of radio frequency chip control precision to realize
When, more negative voltage signal level value can also be generated to realize a wide range of efficient control.Therefore, the application is real
Applying the technical solution in example also has the skill for further increasing applicability and the scope of application, and improving radio frequency chip control precision
Art effect.
In order to further realize the automatization level of system, the first resistor and/or the second resistance are adjustable
Resistance, so that system can automatically control first resistor and/or the second resistance is adjusted to the resistance value R needed1
With resistance value R2。
Still further, when the radio frequency chip includes signal transmission channel, the transmitting grid of the signal transmission channel
Receiving end is crimped, is in unlatching to control the signal transmission channel after receiving the negative voltage signal with the first level value
Otherwise state controls the transmission channel and is in close state；And/or
When the radio frequency chip includes signal receiving channel, the receiving grid of the signal receiving channel crimps receiving end, uses
It is in the open state to control the signal receiving channel after receiving the negative voltage signal with second electrical level value, otherwise control
The signal receiving channel is made to be in close state；
Wherein, first level value is different with the second electrical level value.
That is, as shown in Fig. 2, in the embodiment of the present application, each signal transmission passage corresponds to a application
Quick negative voltage switching circuit in embodiment is independently controlled, meanwhile, the number in these quick negative voltage switching circuits
Word controller can be merged into using a digitial controller, from the digitial controller respectively to these negative voltages when practical operation
Switching circuit issues corresponding digital control signal.For example, digitial controller can when radio frequency chip is in signal emission state
Corresponding first control signal (such as VH_DIG) is exported to signal sendaisle, the first fortune being correspondingly connected with signal transmission channel
Circuit collective effect where calculating amplifier carries out reversed enhanced processing to first control signal and generates corresponding first negative voltage letter
Number, so that signal transmission channel is opened；Meanwhile digitial controller also sends corresponding second control signal to signal receiving channel
(such as VL_DIG), circuit collective effect where the second operational amplifier being correspondingly connected with signal receiving channel believe the second control
Number carrying out reversed enhanced processing generates corresponding second negative voltage signal, so that signal receiving channel is closed.When work is receiving
When state, control logic is opposite with emission state.Thus the signal transmitting and receiving pattern switching control to radio frequency chip is completed.
As shown in the above, the technical solution in the embodiment of the present application can substantially reduce the negative electricity of the embodiment of the present application
Switching circuit application cost is pressed, while the isolation of each signal transmission pathway in radio frequency chip also can be improved, reduction is played and penetrates
The technical effect of frequency chip controls error rate.
Further specifically, the digitial controller can be specifically as follows following equipment in the embodiment of the present application, or
For the combination of following equipment: CPU, and/or MCU, and/or FPGA, and/or DSP.It is possible thereby to which realizing reduces application cost and reality
The technical effect of existing apparatus flexibility.
It can be seen that the technical solution in the embodiment of the present application has predetermined level value V by setting outputrefWith reference to electricity
The reference voltage input terminal of pressure, output have predetermined level value VinDigital control signal digitial controller, and by it is above-mentioned with reference to electricity
Input terminal and digitial controller is pressed to connect operational amplifier, so as to be based on the reference voltage to described using operational amplifier
Digital control signal carries out reversed enhanced processing, generates different negative voltage signals, and different negative voltage signals is output to radio frequency core
The grid voltage receiving end of piece is to realize the open and close control to receiving channel and/or transmission channel.By changing the reference voltage
Level value, that is, exportable the negative voltage with different voltages value realizes the control to different radio frequency chips, it is seen then that the application is real
Applying a technical solution has the technical effect for expanding the negative voltage switching circuit scope of application.Simultaneously as operational amplifier has
The advantages that fast, at low cost is reacted, the technical solution in the embodiment of the present application can be made also has that switch speed is fast, operating efficiency
The technical effects such as high, operation summary degree height.
Although the preferred embodiment of the application has been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects embodiment and falls into all change and modification of the application range.
Obviously, those skilled in the art can carry out various modification and variations without departing from the essence of the application to the application
Mind and range.Further, each method and step in technical scheme can overturn, and convert sequencing and still fall
Enter in the invention scope that the application is covered.In this way, if these modifications and variations of the application belong to the claim of this application
And its within the scope of equivalent technologies, then the application is also intended to include these modifications and variations.
Claims (6)
1. a kind of quick negative voltage switching circuit characterized by comprising
Reference voltage input terminal, to export with predetermined level value VrefReference voltage；
Digitial controller, to export with predetermined level value VinDigital control signal；
Operational amplifier is separately connected with the reference voltage input terminal and the digitial controller, to be based on the reference
Voltage carries out reversed enhanced processing, generation and V to the digital control signalrefAnd VinCorresponding negative voltage signal；
Radio frequency chip, including signal receiving channel or signal transmission channel, the signal receiving channel or signal transmission channel
Grid voltage receiving end is connect with the operational amplifier, to the negative voltage signal that is received based on the grid voltage receiving end
Level value VoutControl the opening and closing of the signal receiving channel or signal transmission channel.
2. switching circuit as described in claim 1, which is characterized in that the switching circuit further include:
First resistor is arranged on the connecting path of the digitial controller and the operational amplifier, the first resistor tool
There is preset resistance value R1；
Second resistance is arranged on the connecting path of the first resistor and the radio frequency chip and with the operational amplifier simultaneously
Connection, the second resistance have preset resistance value R2；
The operational amplifier, to be based on Vref、Vin、R1And R2Reversed enhanced processing, generation pair are carried out to the digital control signal
The negative voltage signal V answeredout。
3. switching circuit as described in claim 1, which is characterized in that the operational amplifier, to be based on the first calculating formula
Reversed enhanced processing is carried out to the digital control signal, generates corresponding negative voltage signal Vout, wherein first calculating formula are as follows:
Vout=(1+R2/R1)*Vref-(R2/R1)Vin。
4. switching circuit as claimed in claim 2, which is characterized in that the first resistor and/or the second resistance are can
Mode resistance.
5. switching circuit as described in claim 1, which is characterized in that when the radio frequency chip includes signal transmission channel,
The transmitting grid voltage receiving end of the signal transmission channel, to be controlled after receiving the negative voltage signal with the first level value
The signal transmission channel is in the open state, otherwise controls the transmission channel and is in close state；And/or
When the radio frequency chip includes signal receiving channel, the receiving grid of the signal receiving channel crimps receiving end, to
It receives that control the signal receiving channel after the negative voltage signal with second electrical level value in the open state, otherwise controls institute
Signal receiving channel is stated to be in close state；
Wherein, first level value is different with the second electrical level value.
6. switching circuit as described in claim 1, which is characterized in that the digitial controller includes:
CPU, and/or MCU, and/or FPGA, and/or DSP.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910538816.2A CN110324062A (en) | 2019-06-20 | 2019-06-20 | A kind of quick negative voltage switching circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910538816.2A CN110324062A (en) | 2019-06-20 | 2019-06-20 | A kind of quick negative voltage switching circuit |
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| CN110324062A true CN110324062A (en) | 2019-10-11 |
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| CN201910538816.2A Pending CN110324062A (en) | 2019-06-20 | 2019-06-20 | A kind of quick negative voltage switching circuit |
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Cited By (2)
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| CN113193839A (en) * | 2021-04-08 | 2021-07-30 | 成都蕊感微电子有限公司 | Signal receiving and amplifying circuit and sensor |
| CN113422657A (en) * | 2021-06-22 | 2021-09-21 | 中国电子科技集团公司第二十九研究所 | Power test system of many transmission channels |
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