CN109831202A - Linear isolator - Google Patents
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- CN109831202A CN109831202A CN201910177945.3A CN201910177945A CN109831202A CN 109831202 A CN109831202 A CN 109831202A CN 201910177945 A CN201910177945 A CN 201910177945A CN 109831202 A CN109831202 A CN 109831202A
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Abstract
The invention discloses a kind of linear isolators, are related to field of signal processing.It include: sequentially connected oscillating circuit, coupled transfer circuit, demodulator circuit and triode, in which: oscillating circuit is used to the analog signal or digital signal of input being converted into oscillator signal；Coupled transfer circuit is for being isolated transmission oscillator signal；Demodulator circuit is for demodulating oscillator signal；The base stage of triode and the output end of demodulator circuit connect, emitter ground connection, and as signal output end, triode is used to obtain output signal according to the oscillator signal after demodulation collector.Linear isolator provided by the invention, realize the isolation transmission to analog signal or digital signal, the linear isolator has input port, output port, the first ground terminal and the second ground terminal totally 4 ports, it being capable of 1:1 replacement linearly or nonlinearly four port photo-coupler in situ, it realizes isolation features, and has the advantages that chip volume is small, low in energy consumption, performance is good and high reliablity.
Description
Technical field
The present invention relates to field of signal processing, more particularly to it is a kind of can be compatible with four port photo-coupler pins it is linear every
From device.
Background technique
In the electronic equipments such as military electronic systems, aerospace equipment and Medical Devices, in order to eliminate the noise of signal,
It protects device and user to injure from high pressure, isolator is usually added in the electronic device.
And photo-coupler is always the main selection of isolator, but it is lacked there are easy to aging, power consumption is high, the service life is short etc.
Point limits its usage scenario.And use integrated circuit technology manufacture isolator power consumption, in terms of more
With advantage, it is substituted for photo-coupler.
However currently, the integrated circuit isolator for replacing photo-coupler can only transmit digital signal, mould can not be transmitted
Quasi- signal, cannot achieve linear isolation.
Summary of the invention
The technical problem to be solved by the present invention is in view of the deficiencies of the prior art, provide one kind to be compatible with four port opticals
The linear isolator of coupler pin can replace the linearly or nonlinearly four port photo-coupler in electronic equipment in situ, every
From transmission of analogue signal or digital signal.
The technical scheme to solve the above technical problems is that
A kind of linear isolator, comprising: sequentially connected oscillating circuit, coupled transfer circuit, demodulator circuit and triode,
Wherein:
The oscillating circuit is used to the analog signal or digital signal of input being converted into oscillator signal；
The coupled transfer circuit transmits the oscillator signal for being isolated；
The demodulator circuit is for demodulating the oscillator signal；
The base stage of the triode is connect with the output end of the demodulator circuit, and emitter ground connection, collector is as signal
Output end, the triode are used to obtain output signal according to the oscillator signal after demodulation.
The beneficial effects of the present invention are: linear isolator provided by the invention, is believed by simulation of the oscillating circuit to input
Number or digital signal converted, by coupled transfer circuit be isolated transmit, then demodulated by demodulator circuit, pass through three
Pole pipe output signal, realizes the isolation transmission to analog signal or digital signal, which has input port, defeated
Exit port, the first ground terminal and the second ground terminal totally 4 ports, being capable of 1:1 replacement linearly or nonlinearly four port optocoupler in situ
Clutch realizes isolation features, and has the advantages that chip volume is small, low in energy consumption, performance is good and high reliablity.
The another technical solution that the present invention solves above-mentioned technical problem is as follows:
A kind of encapsulating package, comprising: the first chip and the second chip, in which:
First chip oscillating circuit as described in above-mentioned technical proposal and coupled transfer circuit package form；
Second chip demodulator circuit as described in above-mentioned technical proposal and triode encapsulate.
The another technical solution that the present invention solves above-mentioned technical problem is as follows:
A kind of electronic equipment, including linear isolator as described in the above technical scheme.
The advantages of additional aspect of the invention, will be set forth in part in the description, and will partially become from the following description
It obtains obviously, or practice is recognized through the invention.
Detailed description of the invention
Fig. 1 is the structural framing schematic diagram that the embodiment of linear isolator of the present invention provides；
Waveform diagram when the input analog signal that Fig. 2 provides for the embodiment of linear isolator of the present invention；
Waveform diagram when the input digital signal that Fig. 3 provides for the embodiment of linear isolator of the present invention；
Fig. 4 is the electrical block diagram that the other embodiments of linear isolator of the present invention provide；
Fig. 5 is the electrical block diagram that the other embodiments of linear isolator of the present invention provide；
Fig. 6 is the chip package schematic diagram that the embodiment of encapsulating package of the present invention provides；
Fig. 7 is the cascade transformer structural schematic diagram that the other embodiments of linear isolator of the present invention provide；
Fig. 8 is the cascade capacitance structure schematic diagram that the other embodiments of linear isolator of the present invention provide.
Specific embodiment
The principle and features of the present invention will be described below with reference to the accompanying drawings, and illustrated embodiment is served only for explaining the present invention,
It is not intended to limit the scope of the present invention.
As shown in Figure 1, for the structural framing schematic diagram that provides of embodiment of linear isolator of the present invention, the linear isolator
It include: sequentially connected oscillating circuit 1, coupled transfer circuit 2, demodulator circuit 3 and triode 4, in which:
Oscillating circuit 1 is used to the analog signal or digital signal of input being converted into oscillator signal；
Coupled transfer circuit 2 is for being isolated transmission oscillator signal；
Demodulator circuit 3 is for demodulating oscillator signal；
The base stage of triode 4 is connect with the output end of demodulator circuit 3, emitter ground connection, collector as signal output end,
Triode 4 is used to obtain output signal according to the oscillator signal after demodulation.
It should be understood that the linear isolator has 4 ports, oscillating circuit 1 is provided with signal input port and the first ground connection
End, triode 4 are provided with signal output port and the second ground terminal, and therefore, which can replace existing system in situ
Four port photo-couplers in system, the pin compatibility with four port photo-couplers.
It should be noted that oscillating circuit 1 can be realized using complementary chiasma coupled structure, LC oscillating circuit 1 etc. to defeated
Enter the oscillation of signal.
Coupled transfer circuit 2 can be using the realizations such as transformer coupled transmission circuit 2, capacitive coupling transmission circuit 2 isolation
Transmit oscillator signal.Wherein, the transformer in transformer coupled transmission circuit 2, capacitor in capacitive coupling transmission circuit 2 can be with
It is divided using cascade mode, to realize the demand of isolator pressure resistance.
As shown in fig. 7, a kind of structural schematic diagram of illustrative cascade transformer is given, the transformation that dotted line is irised out in figure
Device constitutes cascade structure, as shown in figure 8, a kind of structural schematic diagram of illustrative cascade capacitor is given, virtual coil in figure
Capacitor out constitutes cascade structure.
Demodulator circuit 3 can realize signal demodulation function using full bridge rectifier, RC filter circuit etc..
As shown in Figure 2 and Figure 3, respectively transmission of analogue signal and waveform diagram when digital signal, below with reference to Fig. 2
It is illustrated with working principle of the Fig. 3 to the linear isolator.
As shown in Fig. 2, the analog signal of input is converted into upper frequency by oscillating circuit 1 when inputting analog signal
The amplitude of oscillator signal, oscillator signal increases with the increase of the amplitude of analog signal, will be vibrated by coupled transfer circuit 2
For signal-isolated transmission to demodulator circuit 3, demodulator circuit 3 demodulates the oscillator signal received, generates the simulation with input
The demodulated signal of the amplitude in proportion relationship of signal, the base stage of triode 4 are demodulated signal driving, are putting the work of triode 4
Great Qu, at this point, the electric current that the collector of triode 4 exports is output signal, output signal is in a linear relationship with input signal.
As shown in figure 3, when inputting the high level signal of digital signal, oscillating circuit 1 is by the height of the digital signal of input
Level signal is converted into the oscillator signal of upper frequency, and oscillator signal isolation is transferred to demodulation electricity by coupled transfer circuit 2
Road 3, demodulator circuit 3 demodulate the oscillator signal received, generate demodulation identical with the frequency of digital signal of input
Signal, the base stage of triode 4 are demodulated signal driving, make the work of triode 4 in saturation region, and collector exports low level signal；
When inputting the low level signal of digital signal, oscillating circuit 1 does not work, and for the work of triode 4 in cut-off region, collector output is high
Level signal.
Linear isolator provided in this embodiment, the analog signal or digital signal inputted by 1 Dui of oscillating circuit carry out
Conversion is isolated by coupled transfer circuit 2 and is transmitted, and is then demodulated by demodulator circuit 3, by 4 output signal of triode,
The isolation transmission to analog signal or digital signal is realized, when input analog signal, triode 4 works in amplification region, defeated
Signal and input signal are in a linear relationship out；When inputting digital signal, triode transistor work (inputs low electricity in cut-off region
It is flat) and saturation region (input high level), output signal and input signal opposite in phase.
The linear isolator has input port, output port, the first ground terminal and the second ground terminal totally 4 ports, energy
Enough 1:1 replace linearly or nonlinearly four port photo-coupler in situ, realize isolation features, and the small, power consumption with chip volume
The advantages of low, performance is good and high reliablity.
It should be noted that coupled transfer circuit 2 can use transformer coupled transmission circuit 2 or capacitor in the present invention
Coupled transfer circuit 2 realizes that isolation transmission oscillator signal carries out furtherly respectively below on the basis of the above embodiments
It is bright.
As shown in figure 4, one kind is shown for when linear isolator provided by the invention uses transformer coupled transmission circuit 2
The electrical block diagram of example property.
Oscillating circuit 1 may include: the first PMOS tube 11, the second PMOS tube 12, first capacitor 13,14 and of the first NMOS tube
Second NMOS tube 15, in which:
The source electrode of first PMOS tube 11 and the connection of the source electrode of the second PMOS tube 12, as signal input part, the first PMOS tube
11 drain electrode respectively with the grid of the second PMOS tube 12, one end of first capacitor 13, the drain electrode of the first NMOS tube 14, the 2nd NMOS
The grid and coupled transfer circuit 2 of pipe 15 connect, the grid of the first PMOS tube 11 respectively with the drain electrode of the second PMOS tube 12, first
The other end of capacitor 13, the grid of the first NMOS tube 14, the drain electrode of the second NMOS tube 15 and coupled transfer circuit 2 connect；
The source electrode of first NMOS tube 14 and the connection of the source electrode of the second NMOS tube 15, as the first ground terminal.
It should be understood that oscillating circuit 1 is in order to realize the effect of oscillation, it should also include the primary coil of transformer 21, with reality
The primary coil of transformer can be divided into the one of oscillating circuit 1 according to actual needs by existing LC oscillation, those skilled in the art
Part.
Coupled transfer circuit 2 may include: transformer 21, and the primary coil of transformer 21 is connect with oscillating circuit 1, secondary
Coil is connect with demodulator circuit 3.
It should be understood that one end of primary coil is connect with the drain electrode of the first PMOS tube 11, the other end and the first PMOS tube 11
Grid connection.
Optionally, demodulator circuit 3 may include: first diode 31, the second diode 32, third diode the 33, the 4th
Diode 34, the 4th capacitor 35, the 5th capacitor 36 and first resistor 37, in which:
The anode of first diode 31 is connect with the cathode of the second diode 32 and coupled transfer circuit 2 respectively, and the one or two
The cathode of pole pipe 31 is connect with one end of the cathode of third diode 33, one end of the 4th capacitor 35 and first resistor 37 respectively；
The other end of first resistor 37 is connect with the base stage of one end of the 5th capacitor 36 and triode 4 respectively；
Second diode 32 anode respectively with the anode of the 4th diode 34, the other end of the 4th capacitor 35, the 5th electricity
The other end of appearance 36 is connected with the emitter of triode 4；
The anode of third diode 33 is connect with the cathode of the 4th diode 34 and coupled transfer circuit 2 respectively.
It should be understood that one end of secondary coil is connect with the anode of first diode 31, the other end and third diode 33
Anode connection.
By the way that first resistor 37 to be connected between the 4th capacitor 35 and the 5th capacitor 36, when inputting analog signal, no
Filter resistance can be only used as, additionally it is possible to limit the current value of the base stage of triode 4.
Optionally, the emitter of triode 4 can connect second resistance 41, as the second ground terminal.
Second resistance 41 is connected by the emitter in triode 4, can be improved the linearity of output signal.
It optionally, can also include: 3rd resistor 51, the 5th diode 52 and the 6th capacitor 53, in which:
One end of 3rd resistor 51 is connect with the input terminal of oscillating circuit 1, and the other end is negative with the 5th diode 52 respectively
Pole is connected with one end of the 6th capacitor 53；
The anode of 5th diode 52 is as signal input part；
The other end of 6th capacitor 53 is connect with the ground terminal of oscillating circuit 1.
Wherein, the 5th diode 52 can protect circuit, the 6th capacitor 53 can pressure stabilizing, 3rd resistor 51 can limit defeated
Enter the current value of signal.
As shown in figure 5, for when linear isolator provided by the invention uses capacitive coupling transmission circuit 2, a kind of example
The electrical block diagram of property.
Oscillating circuit 1 may include: the first PMOS tube 11, the second PMOS tube 12, first capacitor 13, inductance 16, first
NMOS tube 14 and the second NMOS tube 15, in which:
The source electrode of first PMOS tube 11 and the connection of the source electrode of the second PMOS tube 12, as signal input part, the first PMOS tube
11 drain electrode respectively with the grid of the second PMOS tube 12, one end of first capacitor 13, the drain electrode of the first NMOS tube 14, the 2nd NMOS
The grid of pipe 15 is connected with one end of inductance 16, the grid of the first PMOS tube 11 respectively with the drain electrode of the second PMOS tube 12, first
The other end of capacitor 13, the grid of the first NMOS tube 14, the drain electrode of the second NMOS tube 15 are connected with the other end of inductance 16；
The source electrode of first NMOS tube 14 and the connection of the source electrode of the second NMOS tube 15, as the first ground terminal.
Coupled transfer circuit 2 may include: the second capacitor 22 and third capacitor 23, in which:
One end of second capacitor 22 is connect with one end of inductance 16, and the other end is connect with demodulator circuit 3；
One end of third capacitor 23 is connect with the other end of inductance 16, and the other end is connect with demodulator circuit 3.
Optionally, demodulator circuit 3 may include: first diode 31, the second diode 32, third diode the 33, the 4th
Diode 34, the 4th capacitor 35, the 5th capacitor 36 and first resistor 37, in which:
The anode of first diode 31 is connect with the cathode of the second diode 32 and coupled transfer circuit 2 respectively, and the one or two
The cathode of pole pipe 31 is connect with one end of the cathode of third diode 33, one end of the 4th capacitor 35 and first resistor 37 respectively；
The other end of first resistor 37 is connect with the base stage of one end of the 5th capacitor 36 and triode 4 respectively；
Second diode 32 anode respectively with the anode of the 4th diode 34, the other end of the 4th capacitor 35, the 5th electricity
The other end of appearance 36 is connected with the emitter of triode 4；
The anode of third diode 33 is connect with the cathode of the 4th diode 34 and coupled transfer circuit 2 respectively.
It should be understood that the other end of the second capacitor 22 is connect with the anode of first diode 31, the other end of third capacitor 23
It is connect with the anode of third diode 33.
By the way that first resistor 37 to be connected between the 4th capacitor 35 and the 5th capacitor 36, when inputting analog signal, no
Filter resistance can be only used as, additionally it is possible to limit the current value of the base stage of triode 4.
Optionally, the emitter of triode 4 can connect second resistance 41, as the second ground terminal.
Second resistance 41 is connected by the emitter in triode 4, can be improved the linearity of output signal.
It optionally, can also include: 3rd resistor 51, the 5th diode 52 and the 6th capacitor 53, in which:
One end of 3rd resistor 51 is connect with the input terminal of oscillating circuit 1, and the other end is negative with the 5th diode 52 respectively
Pole is connected with one end of the 6th capacitor 53；
The anode of 5th diode 52 is as signal input part；
The other end of 6th capacitor 53 is connect with the ground terminal of oscillating circuit 1.
Wherein, the 5th diode 52 can protect circuit, the 6th capacitor 53 can pressure stabilizing, 3rd resistor 51 can limit defeated
Enter the current value of signal.
In other embodiments of the invention, a kind of encapsulating package is also provided, as shown in Figure 6, comprising: the first chip 100
With the second chip 200, in which:
First chip 100 by the oscillating circuit 1 any in the various embodiments described above and the encapsulation of coupled transfer circuit 2 and
At；
Second chip 200 is encapsulated by the demodulator circuit 3 and triode 4 any in the various embodiments described above.
It is encapsulated in same shell between first chip 100 and the second chip 200 by bonding line or other connection types,
The pin of first chip 100 is signal input part and the first ground terminal, and the pin of the second chip 200 is signal output end and second
Ground terminal, in actual work, the signal output port of the second chip 200 can outer connecting resistance and power supply, complete signal output.
Optionally, can be with series diode and resistance between signal input part and oscillating circuit 1, diode is for protecting
Circuit, resistance are used to limit the current value of input signal, can be used between signal input part and the first ground terminal with shunt capacitance
In pressure stabilizing.
It can connect a resistance in the emitter of triode 4, can be improved the linearity of output signal
By being made linear isolator of integrated circuit technology, there is core compared with linearly or nonlinearly photo-coupler
Piece area is small, high reliability.
In other embodiments of the invention, a kind of electronic equipment is also provided, including such as institute any in the various embodiments described above
The linear isolator stated.
It should be understood that electronic equipment refers to the military electronic comprising the linear isolator any in the various embodiments described above
System, aero-space electronic equipment, Medical Devices etc..
Reader should be understood that in the description of this specification reference term " one embodiment ", " is shown " some embodiments "
The description of example ", " specific example " or " some examples " etc. mean specific features described in conjunction with this embodiment or example, structure,
Material or feature are included at least one embodiment or example of the invention.In the present specification, above-mentioned term is shown
The statement of meaning property need not be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described
It may be combined in any suitable manner in any one or more of the embodiments or examples.In addition, without conflicting with each other, this
The technical staff in field can be by the spy of different embodiments or examples described in this specification and different embodiments or examples
Sign is combined.
In several embodiments provided herein, it should be understood that disclosed device and method can pass through it
Its mode is realized.For example, the apparatus embodiments described above are merely exemplary, for example, the division of unit, only
A kind of logical function partition, there may be another division manner in actual implementation, for example, multiple units or components can combine or
Person is desirably integrated into another system, or some features can be ignored or not executed.
Unit may or may not be physically separated as illustrated by the separation member, shown as a unit
Component may or may not be physical unit, it can and it is in one place, or may be distributed over multiple networks
On unit.It can select some or all of unit therein according to the actual needs to realize the mesh of the embodiment of the present invention
's.
More than, only a specific embodiment of the invention, but scope of protection of the present invention is not limited thereto, and it is any to be familiar with
Those skilled in the art in the technical scope disclosed by the present invention, can readily occur in various equivalent modifications or substitutions,
These modifications or substitutions should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be wanted with right
Subject to the protection scope asked.
Claims (10)
1. a kind of linear isolator characterized by comprising sequentially connected oscillating circuit (1), coupled transfer circuit (2), solution
Adjust circuit (3) and triode (4), in which:
The oscillating circuit (1) is used to the analog signal or digital signal of input being converted into oscillator signal；
The coupled transfer circuit (2) transmits the oscillator signal for being isolated；
The demodulator circuit (3) is for demodulating the oscillator signal；
The base stage of the triode (4) is connect with the output end of the demodulator circuit (3), and emitter ground connection, collector is as letter
Number output end, the triode (4) are used to obtain output signal according to the oscillator signal after demodulation.
2. linear isolator according to claim 1, which is characterized in that the oscillating circuit (1) includes: the first PMOS tube
(11), the second PMOS tube (12), first capacitor (13), the first NMOS tube (14) and the second NMOS tube (15), in which:
The source electrode of first PMOS tube (11) is connected with the source electrode of second PMOS tube (12), as signal input part, institute
State the drain electrode of the first PMOS tube (11) respectively with the grid of second PMOS tube (12), the first capacitor (13) one end,
The drain electrode of first NMOS tube (14), the grid of second NMOS tube (15) and the coupled transfer circuit (2) connection, institute
State the grid of the first PMOS tube (11) respectively with the drain electrode of second PMOS tube (12), the first capacitor (13) it is another
End, the drain electrode of the grid of first NMOS tube (14), second NMOS tube (15) and the coupled transfer circuit (2) connection；
The source electrode of first NMOS tube (14) is connected with the source electrode of second NMOS tube (15), as the first ground terminal.
3. linear isolator according to claim 2, which is characterized in that the coupled transfer circuit (2) includes: transformer
(21), the primary coil of the transformer (21) is connect with the oscillating circuit (1), secondary coil and the demodulator circuit (3)
Connection.
4. linear isolator according to claim 1, which is characterized in that the oscillating circuit (1) includes: the first PMOS tube
(11), the second PMOS tube (12), first capacitor (13), inductance (16), the first NMOS tube (14) and the second NMOS tube (15),
In:
The source electrode of first PMOS tube (11) is connected with the source electrode of second PMOS tube (12), as signal input part, institute
State the drain electrode of the first PMOS tube (11) respectively with the grid of second PMOS tube (12), the first capacitor (13) one end,
The drain electrode of first NMOS tube (14), the grid of second NMOS tube (15) are connected with one end of the inductance (16), institute
State the grid of the first PMOS tube (11) respectively with the drain electrode of second PMOS tube (12), the first capacitor (13) it is another
End, the drain electrode of the grid of first NMOS tube (14), second NMOS tube (15) are connected with the other end of the inductance (16)；
The source electrode of first NMOS tube (14) is connected with the source electrode of second NMOS tube (15), as the first ground terminal.
5. linear isolator according to claim 4, which is characterized in that the coupled transfer circuit (2) includes: the second electricity
Hold (22) and third capacitor (23), in which:
One end of second capacitor (22) is connect with one end of the inductance (16), and the other end and the demodulator circuit (3) are even
It connects；
One end of the third capacitor (23) is connect with the other end of the inductance (16), the other end and the demodulator circuit (3)
Connection.
6. linear isolator according to claim 1, which is characterized in that the demodulator circuit (3) includes: first diode
(31), the second diode (32), third diode (33), the 4th diode (34), the 4th capacitor (35), the 5th capacitor (36) and
First resistor (37), in which:
The first diode (31) anode respectively with the cathode and the coupled transfer circuit of second diode (32)
(2) connect, the cathode of the first diode (31) respectively with the cathode of the third diode (33), the 4th capacitor
(35) one end is connected with the one end of first resistor (37)；
The other end of the first resistor (37) base stage with one end of the 5th capacitor (36) and the triode (4) respectively
Connection；
Second diode (32) anode respectively with positive, described 4th capacitor (35) of the 4th diode (34)
The other end, the 5th capacitor (36) the other end connected with the emitter of the triode (4)；
The third diode (33) anode respectively with the cathode and the coupled transfer circuit of the 4th diode (34)
(2) it connects.
7. linear isolator according to claim 1, which is characterized in that the emitter of the triode (4) is connected with
Two resistance (41), as the second ground terminal.
8. linear isolator according to any one of claim 1 to 7, which is characterized in that further include: 3rd resistor
(51), the 5th diode (52) and the 6th capacitor (53), in which:
One end of the 3rd resistor (51) is connect with the input terminal of the oscillating circuit (1), and the other end is respectively with the described 5th
The cathode of diode (52) is connected with one end of the 6th capacitor (53)；
The anode of 5th diode (52) is as signal input part；
The other end of 6th capacitor (53) is connect with the ground terminal of the oscillating circuit (1).
9. a kind of encapsulating package characterized by comprising the first chip (100) and the second chip (200), in which:
First chip (100) is by oscillating circuit described in any item of the claim 1 to 8 (1) and coupled transfer circuit (2)
It encapsulates；
Second chip (200) by demodulator circuit described in any item of the claim 1 to 8 (3) and triode (4) encapsulation and
At.
10. a kind of electronic equipment, which is characterized in that including linear isolator such as described in any item of the claim 1 to 8.
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| CN201910177945.3A CN109831202A (en) | 2019-03-07 | 2019-03-07 | Linear isolator |
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| CN201910177945.3A CN109831202A (en) | 2019-03-07 | 2019-03-07 | Linear isolator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110324018A (en) * | 2019-07-25 | 2019-10-11 | 合肥本源量子计算科技有限责任公司 | A kind of microwave signal annular delivery structure |
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