CN206656736U - A kind of fibre optic gyroscope low-work voltage modulating signal circuit - Google Patents
A kind of fibre optic gyroscope low-work voltage modulating signal circuit Download PDFInfo
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- CN206656736U CN206656736U CN201720338988.1U CN201720338988U CN206656736U CN 206656736 U CN206656736 U CN 206656736U CN 201720338988 U CN201720338988 U CN 201720338988U CN 206656736 U CN206656736 U CN 206656736U
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Abstract
A kind of fibre optic gyroscope low-work voltage modulating signal circuit is the utility model is related to, belongs to fibre optic gyroscope field.The utility model includes D/A converter N1, low input common mode voltage difference transport and placing device N2, differential signal low pass filter N3, wide output voltage swing differential transport and placing device N4,12 capacitors and 21 resistors；D/A converter N1, low input common mode voltage difference transport and placing device N2, differential signal low pass filter N3, wide output voltage swing differential transport and placing device N4 are sequentially connected, powered using list+5V, and full signal path uses difference form, the low-work voltage of fibre optic gyroscope can be realized by the utility model, and realizes the wide amplitude of oscillation and low noise of signal output.
Description
Technical field
The utility model belongs to fibre optic gyroscope field, and in particular to a kind of fibre optic gyroscope low-work voltage modulated signal
Circuit.
Background technology
The modulated signal output circuit of light gyro is used for square wave and ladder to Y waveguide output control gyro system closed loop
The superposition ripple of ripple, because the half-wave voltage of Y waveguide is typically between 3V-4.5V, for the modulated signal that amplitude is 2 π phases, it is
Most of Y waveguides be can be suitably used for, it is necessary to which the output voltage swing of modulated signal output circuit is at least ± 4.5V.Current tune
Signal output apparatus processed is typically from the digital/analog converter of need ± 5V power supplies, signal output driver selection ± 5V drivings
Single-ended or difference amplifier to ensure that the signal input range of amplifier is capable of the signal output model of compatible with digital/analog converter
Enclose, and output voltage swing can reach the amplitude needed for gyroscope modulated signal, it is therefore necessary to which use ± 5V power supply is to modulation
Signal output apparatus is powered.Relative to list ± 5V power supply circuits, power supply is added using ± 5V the circuits powered
Complexity and the loss of power, introduce the power supply noise of -5V power supplys more, and add the decoupling of component and electric current in circuit
The complexity in loop.
Utility model content
In view of this, the purpose of this utility model is overcome the deficiencies in the prior art, there is provided a kind of fibre optic gyroscope is low
Operating voltage modulating signal circuit, realizes the low-work voltage of fibre optic gyroscope, and realize signal output the wide amplitude of oscillation and
Low noise.
To realize object above, the utility model adopts the following technical scheme that：
A kind of fibre optic gyroscope low-work voltage modulating signal circuit, including D/A converter N1, low input common mode voltage are poor
Point transport and placing device N2, differential signal low pass filter N3, wide output voltage swing differential transport and placing device N4, capacitor C1, capacitor C2,
Capacitor C3, capacitor C4, capacitor C5, capacitor C6, capacitor C7, capacitor C8, capacitor C9, capacitor C10, electric capacity
Device C11, capacitor C12, resistor R1, resistor R2, resistor R3, resistor R4, resistor R5, resistor R6, resistor
R7, resistor R8, resistor R9, resistor R10, resistor R11, resistor R12, resistor R13, resistor R14, resistor
R15, resistor R16, resistor R17, resistor R18, resistor R19, resistor R20 and resistor R21；
Wherein, the D/A converter N1 has 28 pins, the low input common mode voltage difference transport and placing device N2, described
The differential signal low pass filter N3 and wide output voltage swing differential transport and placing device N4 has 8 pins respectively；
15th pin and the D/A converter of the 1st pin of the D/A converter N1 to the D/A converter N1
Signal input part of N1 the 28th pin respectively as the fibre optic gyroscope low-work voltage modulating signal circuit；
The 16th pin of the D/A converter N1, the 20th pin of the D/A converter N1 and the D/A converter N1
The 26th pin be grounded respectively, the 24th pin of the D/A converter N1 electrically connects with+5V power supply electrical levels, and the D/A turn
Parallel operation N1 the 24th pin is grounded by the capacitor C1；The 27th pin of the D/A converter N1 and+5V power supply electrical levels electricity
Connection；The capacitor C2 and capacitor C3 composition parallel lines, one end and the 27th pin electricity of the D/A converter N1
Connection, other end ground connection；The 17th pin of the D/A converter N1 is grounded by the capacitor C4, the D/A converter N1
The 18th pin be grounded by the resistor R1, the 23rd pin of the D/A converter N1 is grounded by the capacitor C5；
The 21st pin of the D/A converter N1 is grounded by the resistor R3, and the of the D/A converter N1
21 pins are electrically connected by the resistor R5 with the 1st pin of the low input common mode voltage difference transport and placing device N2；The D/A
Converter N1 the 22nd pin is grounded by the resistor R2, and the 22nd pin of the D/A converter N1 pass through it is described
Resistor R4 electrically connects with the 8th pin of the low input common mode voltage difference transport and placing device N2；
The 3rd pin of the low input common mode voltage difference transport and placing device N2 electrically connects with+5V power supply electrical levels, and described low
Input common mode voltage difference transport and placing device N2 the 3rd pin is grounded by the capacitor C8, the low input common mode voltage difference
Transport and placing device N2 the 6th pin ground connection, the 2nd pin of the low input common mode voltage difference transport and placing device N2 pass through the resistor R8
Electrically connected with+5V power supply electrical levels, and the 2nd pin of the low input common mode voltage difference transport and placing device N2 passes through the resistor
R9 is grounded；The resistor R6 and capacitor C6 composition parallel lines, one end are transported with the low input common mode voltage difference
Device N2 the 1st pin electrical connection is put, the other end electrically connects with the 4th pin of the low input common mode voltage difference transport and placing device N2；
The resistor R20 and capacitor C11 composition parallel lines, one end and the low input common mode voltage difference transport and placing device N2
The electrical connection of the 5th pin, the other end electrically connects with the 8th pin of the low input common mode voltage difference transport and placing device N2；
The 4th pin of the low input common mode voltage difference transport and placing device N2 is believed by the resistor R16 and the difference
Number low pass filter N3 the 1st pin electrical connection；The 5th pin of the low input common mode voltage difference transport and placing device N2 passes through described
Resistor R17 electrically connects with the 8th pin of the differential signal low pass filter N3；
The 3rd pin of the differential signal low pass filter N3 electrically connects with+5V power supply electrical levels, and the differential signal
Low pass filter N3 the 3rd pin is grounded by the capacitor C9, and the 6th pin of the differential signal low pass filter N3 connects
Ground, the 2nd pin of the differential signal low pass filter N3 are electrically connected by the resistor R10 with+5V power supply electrical levels, and
The 2nd pin of the low input common mode voltage difference transport and placing device N2 is grounded by the resistor R11；
The 4th pin of the differential signal low pass filter N3 is put by the resistor R14 and the wide output voltage
Width difference amplifier N4 the 1st pin electrical connection；The 5th pin of the differential signal low pass filter N3 passes through the resistor
R18 electrically connects with the 8th pin of the wide output voltage swing differential amplifier N4；
The 3rd pin of the wide output voltage swing differential amplifier N4 electrically connects with+5V power supply electrical levels, and the width is defeated
The 3rd pin for going out voltage swing difference amplifier N4 is grounded by the capacitor C10, the wide output voltage swing differential amplifier
N4 the 6th pin ground connection, the 2nd pin of the wide output voltage swing differential amplifier N4 are supplied by the resistor R12 and+5V
Level is electrically connected, and the 2nd pin of the wide output voltage swing differential amplifier N4 is grounded by the resistor R13；
The resistor R7 and capacitor C7 composition parallel lines, the of one end and the wide output voltage swing differential amplifier N4
1 pin electrically connects, and the other end electrically connects with the 4th pin of the wide output voltage swing differential amplifier N4；The resistor R21
Parallel line is formed with the capacitor C12, one end and the 5th pin of the wide output voltage swing differential amplifier N4 are electrically connected
Connect, the other end electrically connects with the 8th pin of the wide output voltage swing differential amplifier N4；
The 4th pin of the wide output voltage swing differential amplifier N4 electrically connects with one end of the resistor R15, described
First output end of the resistor R15 other end as the fibre optic gyroscope low-work voltage modulating signal circuit；The width
Output voltage swing difference amplifier N4 the 5th pin electrically connects with one end of the resistor R19, and the resistor R19's is another
Second output end of the one end as the fibre optic gyroscope low-work voltage modulating signal circuit.
Further, the capacitor C1, the capacitor C2, the capacitor C3, the capacitor C4, the electric capacity
Device C5, the capacitor C6, the capacitor C7, the capacitor C8, the capacitor C9, the capacitor C10, the electricity
The container C11 and capacitor C12 is ceramic capacitor.
Further, the ceramic capacitor is multilayer ceramic capacitor.
Further, the ceramic capacitor is individual layer ceramic capacitor.
Further, the resistor R1, the resistor R2, the resistor R3, the resistor R4, the resistance
Device R5, the resistor R6, the resistor R7, the resistor R8, the resistor R9, the resistor R10, the electricity
Hinder device R11, the resistor R12, the resistor R13, the resistor R14, the resistor R15, the resistor
R16, the resistor R17, the resistor R18, the resistor R19, the resistor R20 and the resistor R21 are equal
For film fixed resister.
Further, the film fixed resister is carbon film fixed resister.
Further, a kind of fibre optic gyroscope, the fibre optic gyroscope are adjusted using the fibre optic gyroscope low-work voltage
Signal circuit processed.
Further, the fibre optic gyroscope is open loop FOG.
Further, the fibre optic gyroscope is closed-loop fiber optic gyroscope instrument.
Further, a kind of inertial navigation unit, the inertial navigation unit include the fibre optic gyroscope.
The utility model uses above technical scheme, at least possesses following beneficial effect：
The utility model provides a kind of fibre optic gyroscope low-work voltage modulating signal circuit, D/A converter N1, low common mode
Input voltage difference transport and placing device N2, differential signal low pass filter N3 and wide output voltage swing differential transport and placing device N4 using it is single+
5V powers, and full signal path uses difference form, realizes the low-work voltage of fibre optic gyroscope, and realizes signal
The wide amplitude of oscillation and low noise of output.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is a kind of fibre optic gyroscope low-work voltage modulating signal circuit schematic diagram of the utility model.
Embodiment
, below will be to technology of the present utility model to make the purpose of this utility model, technical scheme and advantage clearer
Scheme is described in detail.Obviously, described embodiment is only the utility model part of the embodiment, rather than all
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not before creative work is made
Resulting all other embodiment is put, belongs to the scope that the utility model is protected.
As shown in figure 1, the utility model provides a kind of fibre optic gyroscope low-work voltage modulating signal circuit, including D/A
Converter N1, low input common mode voltage difference transport and placing device N2, differential signal low pass filter N3, wide output voltage swing differential fortune
Put device N4, capacitor C1, capacitor C2, capacitor C3, capacitor C4, capacitor C5, capacitor C6, capacitor C7, capacitor
C8, capacitor C9, capacitor C10, capacitor C11, capacitor C12, resistor R1, resistor R2, resistor R3, resistor
R4, resistor R5, resistor R6, resistor R7, resistor R8, resistor R9, resistor R10, resistor R11, resistor
R12, resistor R13, resistor R14, resistor R15, resistor R16, resistor R17, resistor R18, resistor R19, electricity
Hinder device R20 and resistor R21；
Wherein, the D/A converter N1 has 28 pins, the low input common mode voltage difference transport and placing device N2, described
The differential signal low pass filter N3 and wide output voltage swing differential transport and placing device N4 has 8 pins respectively；
15th pin and the D/A converter of the 1st pin of the D/A converter N1 to the D/A converter N1
Signal input part of N1 the 28th pin respectively as the fibre optic gyroscope low-work voltage modulating signal circuit；
The 16th pin of the D/A converter N1, the 20th pin of the D/A converter N1 and the D/A converter N1
The 26th pin be grounded respectively, the 24th pin of the D/A converter N1 electrically connects with+5V power supply electrical levels, and the D/A turn
Parallel operation N1 the 24th pin is grounded by the capacitor C1；The 27th pin of the D/A converter N1 and+5V power supply electrical levels electricity
Connection；The capacitor C2 and capacitor C3 composition parallel lines, one end and the 27th pin electricity of the D/A converter N1
Connection, other end ground connection；The 17th pin of the D/A converter N1 is grounded by the capacitor C4, the D/A converter N1
The 18th pin be grounded by the resistor R1, the 23rd pin of the D/A converter N1 is grounded by the capacitor C5；
The 21st pin of the D/A converter N1 is grounded by the resistor R3, and the of the D/A converter N1
21 pins are electrically connected by the resistor R5 with the 1st pin of the low input common mode voltage difference transport and placing device N2；The D/A
Converter N1 the 22nd pin is grounded by the resistor R2, and the 22nd pin of the D/A converter N1 pass through it is described
Resistor R4 electrically connects with the 8th pin of the low input common mode voltage difference transport and placing device N2；
The 3rd pin of the low input common mode voltage difference transport and placing device N2 electrically connects with+5V power supply electrical levels, and described low
Input common mode voltage difference transport and placing device N2 the 3rd pin is grounded by the capacitor C8, the low input common mode voltage difference
Transport and placing device N2 the 6th pin ground connection, the 2nd pin of the low input common mode voltage difference transport and placing device N2 pass through the resistor R8
Electrically connected with+5V power supply electrical levels, and the 2nd pin of the low input common mode voltage difference transport and placing device N2 passes through the resistor
R9 is grounded；The resistor R6 and capacitor C6 composition parallel lines, one end are transported with the low input common mode voltage difference
Device N2 the 1st pin electrical connection is put, the other end electrically connects with the 4th pin of the low input common mode voltage difference transport and placing device N2；
The resistor R20 and capacitor C11 composition parallel lines, one end and the low input common mode voltage difference transport and placing device N2
The electrical connection of the 5th pin, the other end electrically connects with the 8th pin of the low input common mode voltage difference transport and placing device N2；
The 4th pin of the low input common mode voltage difference transport and placing device N2 is believed by the resistor R16 and the difference
Number low pass filter N3 the 1st pin electrical connection；The 5th pin of the low input common mode voltage difference transport and placing device N2 passes through described
Resistor R17 electrically connects with the 8th pin of the differential signal low pass filter N3；
The 3rd pin of the differential signal low pass filter N3 electrically connects with+5V power supply electrical levels, and the differential signal
Low pass filter N3 the 3rd pin is grounded by the capacitor C9, and the 6th pin of the differential signal low pass filter N3 connects
Ground, the 2nd pin of the differential signal low pass filter N3 are electrically connected by the resistor R10 with+5V power supply electrical levels, and
The 2nd pin of the low input common mode voltage difference transport and placing device N2 is grounded by the resistor R11；
The 4th pin of the differential signal low pass filter N3 is put by the resistor R14 and the wide output voltage
Width difference amplifier N4 the 1st pin electrical connection；The 5th pin of the differential signal low pass filter N3 passes through the resistor
R18 electrically connects with the 8th pin of the wide output voltage swing differential amplifier N4；
The 3rd pin of the wide output voltage swing differential amplifier N4 electrically connects with+5V power supply electrical levels, and the width is defeated
The 3rd pin for going out voltage swing difference amplifier N4 is grounded by the capacitor C10, the wide output voltage swing differential amplifier
N4 the 6th pin ground connection, the 2nd pin of the wide output voltage swing differential amplifier N4 are supplied by the resistor R12 and+5V
Level is electrically connected, and the 2nd pin of the wide output voltage swing differential amplifier N4 is grounded by the resistor R13；
The resistor R7 and capacitor C7 composition parallel lines, the of one end and the wide output voltage swing differential amplifier N4
1 pin electrically connects, and the other end electrically connects with the 4th pin of the wide output voltage swing differential amplifier N4；The resistor R21
Parallel line is formed with the capacitor C12, one end and the 5th pin of the wide output voltage swing differential amplifier N4 are electrically connected
Connect, the other end electrically connects with the 8th pin of the wide output voltage swing differential amplifier N4；
The 4th pin of the wide output voltage swing differential amplifier N4 electrically connects with one end of the resistor R15, described
First output end of the resistor R15 other end as the fibre optic gyroscope low-work voltage modulating signal circuit；The width
Output voltage swing difference amplifier N4 the 5th pin electrically connects with one end of the resistor R19, and the resistor R19's is another
Second output end of the one end as the fibre optic gyroscope low-work voltage modulating signal circuit.
When fibre optic gyroscope uses the utility model such scheme, the 1st pin of the D/A converter N1 to the D/
A converters N1 the 15th pin and the 28th pin of the D/A converter N1 are respectively as the low work of the fibre optic gyroscope
The signal input part of voltage modulation signal circuit, electrically connect, connect with the I/O pin of the digital signal processor of fibre optic gyroscope
The digital signal processor of fibre optic gyroscope is received to the D/A converter N1 digital modulation signals sent and control signal；Institute
State the differential signal outputs of D/A converter N1 the 21st pin and the 22nd pin as the D/A converter N1, the D/A
Converter N1 the 21st pin is grounded by the resistor R3, and the 22nd pin of the D/A converter N1 passes through the resistance
Device R2 is grounded, and is carried out current/voltage-converted by resistance, is formed in the 21st pin of the D/A converter N1 and the 22nd pin
Differential voltage signal, its voltage common mode value is+0.5V, and the D/A converter N1 believes the differential voltage of+0.5V voltage common mode values
Number it is output to the low input common mode voltage difference transport and placing device N2.
The 2nd pin of the low input common mode voltage difference transport and placing device N2 passes through the resistor R8 and+5V power supply electrical levels
Electrical connection, and the 2nd pin of the low input common mode voltage difference transport and placing device N2 is grounded by the resistor R9, passes through electricity
+ 2.5V the level values that resistance partial pressure obtains, to provide the common mode of low input common mode voltage difference transport and placing device N2 output signals electricity
Pressure；The low input common mode voltage difference transport and placing device N2 is by the difference of the D/A converter N1+0.5V voltage common mode values exported
The differential voltage signal that output common mode voltage is+2.5V after voltage signal is adjusted and amplified, and it is low to be output to the differential signal
Bandpass filter N3.
The 2nd pin of the differential signal low pass filter N3 is electrically connected by the resistor R10 and+5V power supply electrical levels
Connect, and the 2nd pin of the low input common mode voltage difference transport and placing device N2 is grounded by the resistor R11, passes through resistance
+ 2.5V the level values that partial pressure obtains, to provide the common-mode voltage of the differential signal low pass filter N3 output signals, the difference
Sub-signal low pass filter N3 carries out low pass to the differential voltage signal of the low input common mode voltage difference transport and placing device N2 outputs
Filtering, filters out the Digital Circuit Signal noise and high-frequency noise adulterated in signal, but do not change the common mode and differential mode voltage of signal.
The 2nd pin of the wide output voltage swing differential transport and placing device N4 passes through the resistor R12 and+5V power supply electrical levels
Electrical connection, and the 2nd pin of the wide output voltage swing differential transport and placing device N4 is grounded by the resistor R13, is passed through
+ 2.5V the level values that electric resistance partial pressure obtains, to provide the common mode of the wide output voltage swing differential transport and placing device N4 output signals
Voltage；The 4th pin of the wide output voltage swing differential amplifier N4 electrically connects with one end of the resistor R15, the electricity
First output end of the device R15 other end as the fibre optic gyroscope low-work voltage modulating signal circuit is hindered, the width is defeated
The 5th pin for going out voltage swing difference amplifier N4 electrically connects with one end of the resistor R19, and the resistor R19's is another
The second output end as the fibre optic gyroscope low-work voltage modulating signal circuit is held, by the low work of the fibre optic gyroscope
First output end of voltage modulation signal circuit and the two of the Y waveguide of the second output end and fibre optic gyroscope signal input part electricity
Connection, the wide output voltage swing differential transport and placing device N4 put the differential signal low pass filter N3 filtering signals exported
The big voltage swing to needed for fibre optic gyroscope signal modulation, modulated signal is then exported to Y waveguide.The wide output voltage pendulum
Width difference transport and placing device N4 output voltage swing can reach+4.7V, fully meet the maximum+4.5V needed for general modulated signal
The signal voltage amplitude of oscillation, and slew rate, input output band width and the driving force of wide output voltage swing differential amplifier can
Meet the requirement of output high-precision optical fiber gyro modulated signal.
In the utility model, the D/A converter N1, the low input common mode voltage difference transport and placing device N2, the difference
The NM pins of the low pass signal wave filter N3 and wide output voltage swing differential transport and placing device N4 represent to have neither part nor lot in connection.
It is the capacitor C1, the capacitor C2, the capacitor C3, the capacitor C4, described in the utility model
Capacitor C5, the capacitor C6, the capacitor C7, the capacitor C8, the capacitor C9, the capacitor C10, institute
Ceramic capacitor can be used by stating capacitor C11 and the capacitor C12, be such as situated between using multilayer ceramic capacitor or individual layer porcelain
Capacitor.
It is the resistor R1, the resistor R2, the resistor R3, the resistor R4, described in the utility model
Resistor R5, the resistor R6, the resistor R7, the resistor R8, the resistor R9, the resistor R10, institute
State resistor R11, the resistor R12, the resistor R13, the resistor R14, the resistor R15, the resistance
Device R16, the resistor R17, the resistor R18, the resistor R19, the resistor R20 and the resistor R21
Film fixed resister can be used, such as uses carbon film fixed resister.
Fibre optic gyroscope low-work voltage modulating signal circuit described in the utility model is powered using single+5V, and is believed entirely
Number path uses difference form, thus during any of the above-described using the utility model scheme of fibre optic gyroscope, it is possible to achieve optical fiber top
The low-work voltage of spiral shell instrument, and realize the wide amplitude of oscillation and low noise of signal output.In the prior art, the fibre optic gyroscope point
For open loop FOG and closed-loop fiber optic gyroscope instrument two types, the fibre optic gyroscope of both types can use this reality
With the new fibre optic gyroscope low-work voltage modulating signal circuit.
In the prior art, inertial navigation unit, which needs jointly to coordinate using a variety of inertial navigation means, realizes high-precision lead
Boat, fibre optic gyroscope belong to one kind therein, and for the inertial navigation unit using fibre optic gyroscope, it uses fibre optic gyroscope
It is equally applicable the fibre optic gyroscope low-work voltage modulating signal circuit of the present utility model.
It is described above, only specific embodiment of the present utility model, but the scope of protection of the utility model is not limited to
In this, any one skilled in the art can readily occur in change in the technical scope that the utility model discloses
Or replace, it should all cover within the scope of protection of the utility model.Therefore, the scope of protection of the utility model should be with the power
The protection domain that profit requires is defined.
Claims (10)
- A kind of 1. fibre optic gyroscope low-work voltage modulating signal circuit, it is characterised in that：Including D/A converter N1, low common mode Input voltage difference transport and placing device N2, differential signal low pass filter N3, wide output voltage swing differential transport and placing device N4, capacitor C1, capacitor C2, capacitor C3, capacitor C4, capacitor C5, capacitor C6, capacitor C7, capacitor C8, capacitor C9, electricity Container C10, capacitor C11, capacitor C12, resistor R1, resistor R2, resistor R3, resistor R4, resistor R5, resistance Device R6, resistor R7, resistor R8, resistor R9, resistor R10, resistor R11, resistor R12, resistor R13, resistance Device R14, resistor R15, resistor R16, resistor R17, resistor R18, resistor R19, resistor R20 and resistor R21；Wherein, the D/A converter N1 has 28 pins, the low input common mode voltage difference transport and placing device N2, the difference The low pass signal wave filter N3 and wide output voltage swing differential transport and placing device N4 has 8 pins respectively；The 15th pin and the D/A converter N1 of the 1st pin of the D/A converter N1 to the D/A converter N1 Signal input part of 28th pin respectively as the fibre optic gyroscope low-work voltage modulating signal circuit；The of the 16th pin of the D/A converter N1, the 20th pin of the D/A converter N1 and the D/A converter N1 26 pins are grounded respectively, and the 24th pin of the D/A converter N1 electrically connects with+5V power supply electrical levels, and the D/A converter N1 the 24th pin is grounded by the capacitor C1；The 27th pin of the D/A converter N1 is electrically connected with+5V power supply electrical levels Connect；The capacitor C2 and capacitor C3 composition parallel lines, one end and the 27th pin of the D/A converter N1 are electrically connected Connect, other end ground connection；The 17th pin of the D/A converter N1 is grounded by the capacitor C4, the D/A converter N1's 18th pin is grounded by the resistor R1, and the 23rd pin of the D/A converter N1 is grounded by the capacitor C5；The 21st pin of the D/A converter N1 is grounded by the resistor R3, and the 21st pipe of the D/A converter N1 Pin is electrically connected by the resistor R5 with the 1st pin of the low input common mode voltage difference transport and placing device N2；The D/A conversions Device N1 the 22nd pin is grounded by the resistor R2, and the 22nd pin of the D/A converter N1 passes through the resistance Device R4 electrically connects with the 8th pin of the low input common mode voltage difference transport and placing device N2；The 3rd pin of the low input common mode voltage difference transport and placing device N2 electrically connects with+5V power supply electrical levels, and the low common mode Input voltage difference transport and placing device N2 the 3rd pin is grounded by the capacitor C8, the low input common mode voltage difference amplifier Device N2 the 6th pin ground connection, the 2nd pin of the low input common mode voltage difference transport and placing device N2 by the resistor R8 with+ 5V power supply electrical levels electrically connect, and the 2nd pin of the low input common mode voltage difference transport and placing device N2 passes through the resistor R9 Ground connection；The resistor R6 and capacitor C6 composition parallel lines, one end and the low input common mode voltage difference amplifier Device N2 the 1st pin electrical connection, the other end electrically connect with the 4th pin of the low input common mode voltage difference transport and placing device N2；Institute Resistor R20 and capacitor C11 composition parallel lines are stated, one end is with the low input common mode voltage difference transport and placing device N2's 5th pin electrically connects, and the other end electrically connects with the 8th pin of the low input common mode voltage difference transport and placing device N2；The 4th pin of the low input common mode voltage difference transport and placing device N2 is low with the differential signal by the resistor R16 Bandpass filter N3 the 1st pin electrical connection；The 5th pin of the low input common mode voltage difference transport and placing device N2 passes through the resistance Device R17 electrically connects with the 8th pin of the differential signal low pass filter N3；The 3rd pin of the differential signal low pass filter N3 electrically connects with+5V power supply electrical levels, and the differential signal low pass Wave filter N3 the 3rd pin is grounded by the capacitor C9, the 6th pin ground connection of the differential signal low pass filter N3, The 2nd pin of the differential signal low pass filter N3 is electrically connected by the resistor R10 with+5V power supply electrical levels, and institute The 2nd pin for stating low input common mode voltage difference transport and placing device N2 is grounded by the resistor R11；The 4th pin of the differential signal low pass filter N3 is poor by the resistor R14 and the wide output voltage amplitude of oscillation Partite transport puts N4 the 1st pin electrical connection；The 5th pin of the differential signal low pass filter N3 by the resistor R18 with The 8th pin electrical connection of the wide output voltage swing differential amplifier N4；The 3rd pin of the wide output voltage swing differential amplifier N4 electrically connects with+5V power supply electrical levels, and the wide output electricity Pressure swing differential amplifier N4 the 3rd pin is grounded by the capacitor C10, the wide output voltage swing differential amplifier N4's 6th pin is grounded, and the 2nd pin of the wide output voltage swing differential amplifier N4 passes through the resistor R12 and+5V power supply electricity Ordinary telegram is connected, and the 2nd pin of the wide output voltage swing differential amplifier N4 is grounded by the resistor R13；It is described Resistor R7 and capacitor C7 composition parallel lines, one end and the 1st pipe of the wide output voltage swing differential amplifier N4 Pin electrically connects, and the other end electrically connects with the 4th pin of the wide output voltage swing differential amplifier N4；The resistor R21 and The capacitor C12 forms parallel line, and one end electrically connects with the 5th pin of the wide output voltage swing differential amplifier N4, The other end electrically connects with the 8th pin of the wide output voltage swing differential amplifier N4；The 4th pin of the wide output voltage swing differential amplifier N4 electrically connects with one end of the resistor R15, the resistance First output end of the device R15 other end as the fibre optic gyroscope low-work voltage modulating signal circuit；The wide output Voltage swing difference amplifier N4 the 5th pin electrically connects with one end of the resistor R19, the other end of the resistor R19 The second output end as the fibre optic gyroscope low-work voltage modulating signal circuit.
- 2. fibre optic gyroscope low-work voltage modulating signal circuit according to claim 1, it is characterised in that：The electric capacity Device C1, the capacitor C2, the capacitor C3, the capacitor C4, the capacitor C5, the capacitor C6, the electricity Container C7, the capacitor C8, the capacitor C9, the capacitor C10, the capacitor C11 and the capacitor C12 are equal For ceramic capacitor.
- 3. fibre optic gyroscope low-work voltage modulating signal circuit according to claim 2, it is characterised in that：The porcelain is situated between Capacitor is multilayer ceramic capacitor.
- 4. fibre optic gyroscope low-work voltage modulating signal circuit according to claim 2, it is characterised in that：The porcelain is situated between Capacitor is individual layer ceramic capacitor.
- 5. fibre optic gyroscope low-work voltage modulating signal circuit according to claim 1, it is characterised in that：The resistance Device R1, the resistor R2, the resistor R3, the resistor R4, the resistor R5, the resistor R6, the electricity Hinder device R7, the resistor R8, the resistor R9, the resistor R10, the resistor R11, the resistor R12, institute State resistor R13, the resistor R14, the resistor R15, the resistor R16, the resistor R17, the resistance Device R18, the resistor R19, the resistor R20 and the resistor R21 are film fixed resister.
- 6. fibre optic gyroscope low-work voltage modulating signal circuit according to claim 5, it is characterised in that：The film is consolidated It is carbon film fixed resister to determine resistor.
- A kind of 7. fibre optic gyroscope, it is characterised in that：The fibre optic gyroscope is using described in any one of claim 1 to 6 Fibre optic gyroscope low-work voltage modulating signal circuit.
- 8. fibre optic gyroscope according to claim 7, it is characterised in that：The fibre optic gyroscope is open-loop optical fiber gyro Instrument.
- 9. fibre optic gyroscope according to claim 7, it is characterised in that：The fibre optic gyroscope is closed-loop fiber optic gyroscope Instrument.
- A kind of 10. inertial navigation unit, it is characterised in that：The inertial navigation unit includes the optical fiber top of claim 7 Spiral shell instrument.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110530354A (en) * | 2019-07-22 | 2019-12-03 | 北京航天时代激光导航技术有限责任公司 | A kind of the shaking laser gyroscope circuit and vibration control method of single side feeding |
| CN110823256A (en) * | 2019-11-26 | 2020-02-21 | 湖南中部芯谷科技有限公司 | Pick-up amplifying method and device for photoelectric signal |
-
2017
- 2017-03-31 CN CN201720338988.1U patent/CN206656736U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110530354A (en) * | 2019-07-22 | 2019-12-03 | 北京航天时代激光导航技术有限责任公司 | A kind of the shaking laser gyroscope circuit and vibration control method of single side feeding |
| CN110823256A (en) * | 2019-11-26 | 2020-02-21 | 湖南中部芯谷科技有限公司 | Pick-up amplifying method and device for photoelectric signal |
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