CN207543088U - Shaft angle signal conversion circuit and device - Google Patents
Shaft angle signal conversion circuit and device Download PDFInfo
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- CN207543088U CN207543088U CN201721776453.9U CN201721776453U CN207543088U CN 207543088 U CN207543088 U CN 207543088U CN 201721776453 U CN201721776453 U CN 201721776453U CN 207543088 U CN207543088 U CN 207543088U
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Abstract
The utility model provides a kind of shaft angle signal conversion circuit and device, including input circuit, servo tracking circuit and output circuit.The servo tracking circuit includes scaling multiplication circuit, filter circuit, phase sensitive demodulator circuit, integrating circuit, voltage controlled oscillator and counting circuit, pass through servo tracking circuit, rotation is become into form input signal by the way of ratio tracking conversion and is converted to parallel natural binary digital signal, the analog signal proportional to speed can be provided, it can be good at inhibiting noise, small power consumption has the advantages that with high accuracy.
Description
Technical field
The utility model is related to control technology field, in particular to a kind of shaft angle signal conversion circuit and device.
Background technology
In recent years, angular measurement sensor is had been widely used for from complete machine and rotary transformer in Modern Motion Control System,
Such as AC servo, numerically-controlled machine tool, robot technology.With the development of Digital Signal Processing, this kind of system by
It turns to using digital circuit, microprocessor, digital signal processor, gradually realizes digital based on hardware simulation electronic device
Change.In this kind of closed-loop control system course of work, high-precision digit position and speed signal is needed to be input to digital display circuit
Middle realization is to motor torque, speed and the high-precision control of position, autosyn/rotary transformer --- digital quantizer conduct
The interface of sensor and digital processing system can export the frequency and rotating speed of analog position signal according to sensor, provide height
The digital angle signal and number of precision or simulation tach signal, and obtained with its small size, low cost, high performance feature
It is more and more widely used.
Traditional autosyn/rotary transformer --- digital quantizer generally uses the detection process method of open loop, will
Analog angle signal is converted into digital signal by A/D by sampling hold circuit and calculates determining axis angular position using computer,
This kind of method is easily interfered by noise, and conversion accuracy and tracking velocity are all relatively low.Such as use AD converter and EPROM side
Method realizes converter, and following rate can reach 1500rps under 10 bit resolutions, but since AD converter quantifies to miss in itself
The influence of difference and ambient noise, in actual work resolution ratio be extremely difficult to 10, can not be applied to need high tracking speed
Spend the occasion of high precision position control.Selsyn/rotation of AD, D/A converter and digital signal processing circuit are used at present
Transformer precision is higher, is resolution ratio for 16, and is exported with high-precision rate signal, but complicated, and cost is higher.
Utility model content
The purpose of this utility model is to provide a kind of shaft angle signal conversion circuit and device, to realize that rotary transformer is believed
Number or selsyn signal be converted into the function of digital angle signal.
The utility model is realized in this way：
A kind of shaft angle signal conversion circuit, the shaft angle signal conversion circuit include：Input circuit, servo tracking circuit with
And output circuit, the input terminal of the input circuit are used to access the output signal of rotary transformer, the rotary transformer
Output signal includes SIN signals and COS signals, the input terminal of the servo tracking circuit and the output terminal electricity of the input circuit
Connection, the servo tracking circuit are used for the angle in the output signal according to the rotary transformer for servo tracking circuit
Signal generates digital angle value signal, and the output terminal of the servo tracking circuit is electrically connected with the output circuit, for by institute
Digital angle value signal is stated to export to the output circuit.
Further, the servo tracking circuit include scaling multiplication circuit, filter circuit, phase sensitive demodulator circuit,
Integrating circuit, voltage controlled oscillator and counting circuit, the input terminal of the scaling multiplication circuit and the output of the input circuit
End electrical connection, carries out asking poor for the angle signal in the output signal by rotary transformer and preset digital angle value signal
Exchange error signal is obtained, the output terminal of the scaling multiplication circuit is electrically connected with the input terminal of the filter circuit, described
The output terminal of filter circuit and the input terminal of the phase sensitive demodulator circuit are electrically connected, and the filter circuit is used to eliminate institute
State the DC maladjustment in exchange error signal, filter out high frequency noise, the output terminal of the phase sensitive demodulator circuit with it is described
The input terminal electrical connection of integrating circuit, the output terminal of the integrating circuit and the input terminal of the voltage controlled oscillator are electrically connected,
The phase sensitive demodulator circuit obtains direct current signal, the pressure with the integrating circuit for demodulating the error signal that exchanges
The output terminal of control oscillator is electrically connected with the input terminal of the counting circuit, and the voltage controlled oscillator is used for according to the demodulation institute
It states exchange error signal and obtains direct current signal generation technology pulse, the counting circuit is controlled to be counted and generates new number
Angle value signal.
Further, the counting circuit is electrically connected with the scaling multiplication circuit, and the counting circuit is used to produce
The angle signal that raw digital angle value is sent in the output signal of the scaling multiplication circuit and rotary transformer is compared
Difference is relatively sought until the digital angle value signal is equal to the angle signal in the output signal of the rotary transformer.
Further, the output circuit includes latch, and the latch is electrically connected with the counting circuit, described
Latch is used to store the digital angle value signal of the counting circuit generation.
Further, the scaling multiplication circuit includes the first amplifier, the second amplifier, section choosing switch, digital-to-analogue conversion
Circuit and third amplifier, the input terminal of first amplifier are used to access in the output signal of the rotary transformer
SIN signals, the output terminal of the first amplifier and the first input end of described section of choosing switch are electrically connected；Second amplifier
Input terminal is used to accessing the COS signals in the output signal of the rotary transformer, the output terminal of the second amplifier with described section
Second input terminal of choosing switch is electrically connected, and the input terminal of the output terminal and the D/A converting circuit of described section of choosing switch is electrical
Connection, the output terminal of the D/A converting circuit are electrically connected with the input terminal of the third amplifier, the third amplifier
The input terminal of output terminal and the filter circuit is electrically connected.
Further, the third amplifier is subtracting amplifier.
Further, the filter circuit includes first resistor, second resistance, the first capacitance and the second capacitance, and described the
The first end of one resistance is electrically connected with the output terminal of the scaling multiplication circuit, the first capacitance of second end of the first resistor
First end connects, and the input terminal of the second end of first capacitance and the phase sensitive demodulator circuit is electrically connected, and described the
Between the second end and ground of two capacitances, second resistance parallel connection and first capacitance.
Further, the input circuit includes signal conditioning circuit, and the signal conditioning circuit is used to that transformation will to be rotated
The output signal of device carries out transformation processing.
A kind of shaft angle signal conversion equipment, the shaft angle signal conversion equipment include display circuit and shaft angle signal conversion electricity
Road, the shaft angle signal conversion circuit include：Input circuit, servo tracking circuit and output circuit, the input circuit
Input terminal is used to access the output signal of rotary transformer, and the output signal of the rotary transformer includes SIN signals and COS believes
Number, the input terminal of the servo tracking circuit is electrically connected with the output terminal of the input circuit, and the servo tracking circuit is used for
The angle signal that servo tracking circuit is used in the output signal according to the rotary transformer generates digital angle value signal, institute
The output terminal for stating servo tracking circuit is electrically connected with the output circuit, for exporting the digital angle value signal to described
Output circuit, the display circuit are electrically connected with the output circuit, for showing the digital angle value signal.
Further, the display circuit is light-emitting diode display.
Compared with the prior art, the utility model has the advantages that：
A kind of shaft angle signal conversion circuit and device provided by the utility model, including input circuit, servo tracking circuit
And output circuit.The servo tracking circuit includes scaling multiplication circuit, filter circuit, phase sensitive demodulator circuit, integration
Rotation by servo tracking circuit, is become form by circuit, voltage controlled oscillator and counting circuit by the way of ratio tracking conversion
Input signal is converted to parallel natural binary digital signal, can provide the analog signal proportional to speed, can be fine
Inhibition noise, small power consumption has the advantages that with high accuracy.
For the above-mentioned purpose of the utility model, feature and advantage is enable to be clearer and more comprehensible, preferred embodiment cited below particularly, and
Attached drawing appended by cooperation, is described in detail below.
Description of the drawings
It, below will be to required in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
The attached drawing used is briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore not
The restriction to range is should be considered as, for those of ordinary skill in the art, without creative efforts,
It can also be obtained according to these attached drawings other relevant attached drawings.
Fig. 1 shows a kind of shaft angle signal conversion circuit schematic diagram provided by the utility model.
Fig. 2 shows the schematic block diagrams of servo tracking circuit.
Fig. 3 shows the connection diagram of rotary transformer and scaling multiplication circuit.
Fig. 4 shows the schematic diagram of scaling multiplication circuit.
Fig. 5 shows the schematic diagram of filter circuit.
Icon：10- shaft angle signal conversion circuits；101- input circuits；100- servo tracking circuits；103- output circuits；
110- scaling multiplication circuits；The first amplifiers of A2-；The second amplifiers of A3-；A4- third amplifiers；120- filter circuits；R1-
One resistance；R2- second resistances；The first capacitances of C1-；The second capacitances of C2-；130- phase sensitive demodulator circuits；140- integrating circuit；
150- voltage controlled oscillators；160- counting circuits.
Specific embodiment
Below in conjunction with attached drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out clear
Chu is fully described by, it is clear that the described embodiments are only a part of the embodiments of the utility model rather than whole realities
Apply example.The component of the utility model embodiment being usually described and illustrated herein in the accompanying drawings can be come with a variety of different configurations
Arrangement and design.Therefore, the detailed description of the embodiment of the utility model provided in the accompanying drawings is not intended to limit below
Claimed the scope of the utility model, but it is merely representative of the selected embodiment of the utility model.Based on the utility model
Embodiment, those skilled in the art's all other embodiments obtained under the premise of creative work is not made, all
Belong to the range of the utility model protection.
It should be noted that：Similar label and letter represents similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need to that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it should also be noted that, unless otherwise clearly defined and limited, term " is set
Put ", " installation ", " connected ", " connection " should be interpreted broadly, for example, it may be fixedly connected or be detachably connected,
Or it is integrally connected；Can be mechanical connection or electrical connection；It can be directly connected, intermediary can also be passed through
It is indirectly connected, can be the connection inside two elements.
It is in the description of the present invention, it should also be noted that, herein, such as first and second or the like pass
It is that term is used merely to distinguish one entity or operation from another entity or operation, and not necessarily requires or secretly
Show that there are any actual relationship or orders between these entities or operation.Term " comprising ", "comprising" or its
What his variant is intended to non-exclusive inclusion, so that process, method, article including a series of elements or setting
It is standby not only to include those elements, but also including other elements that are not explicitly listed or further include as this process, side
Method, article or the intrinsic element of equipment.In the absence of more restrictions, limited by sentence "including a ..."
Element, it is not excluded that also there are other identical elements in the process, method, article or apparatus that includes the element.It is right
For those of ordinary skill in the art, concrete meaning of the above-mentioned term in the utility model can be understood with concrete condition.
Below in conjunction with the accompanying drawings, it elaborates to some embodiments of the utility model.In the absence of conflict, under
Feature in the embodiment and embodiment stated can be combined with each other.
First embodiment
Present embodiments provide a kind of shaft angle signal conversion circuit 10, referring to Fig. 1, Fig. 1 show the present embodiment provides
Shaft angle signal conversion circuit 10 schematic diagram.
Shaft angle signal conversion circuit 10 is used for the analog angle signal of the output of rotary transformer or selsyn
Shaft angle signal) it is transformed into digital angle value signal.
Shaft angle signal conversion circuit 10 includes input circuit 101, servo tracking circuit 100 and output circuit 103, described
The input terminal of servo tracking circuit 100 is electrically connected with the output terminal of the input circuit 101, the input of the input circuit 101
The output signal for accessing rotary transformer is held, the output signal of the rotary transformer includes SIN signals and COS signals,
The servo tracking circuit 100 is used for the angle in the output signal according to the rotary transformer for servo tracking circuit 100
Signal generation digital angle value signal is spent, the output terminal of the servo tracking circuit 100 is electrically connected with the output circuit 103,
For exporting the digital angle value signal to the output circuit 103.
Optionally, in this present embodiment, the input circuit 101 includes signal conditioning circuit, the signal conditioning circuit
For pre-processing the output signal of rotary transformer, such as the signal conditioning circuit includes amplifying circuit, for inciting somebody to action
The output signal of rotary transformer carries out transformation processing, for example, output signal is amplified preset multiple.
Alternatively, the signal conditioning circuit is used to the output signal of rotary transformer carrying out phase shift processing.
In this present embodiment, the signal representation mode of the selsyn signal output is as follows：
US1-S3=KE0sinωtsinθ；
US3-S2=KE0sinωtsin(θ+120)；
US2-S1=KE0sinωtsin(θ+240)。
In this present embodiment, the signal expression of rotary transformer output is as follows：
US1-S3=KE0sinωtsinθ；
US2-S4=KE0sinωtcosθ。
Wherein, K represents coefficient, E0Sin ω t represent reference voltage, and θ represents digital angle.
Optionally, referring to Fig. 2, the servo tracking circuit 100 include scaling multiplication circuit 110, filter circuit 120,
Phase sensitive demodulator circuit 130, integrating circuit 140, voltage controlled oscillator 150 and counting circuit 160, the scaling multiplication circuit
110 input terminal is electrically connected with the output terminal of the input circuit 101, the output terminal of the scaling multiplication circuit 110 with it is described
The input terminal of filter circuit 120 is electrically connected, the output terminal of the filter circuit 120 and the phase sensitive demodulator circuit 130
Input terminal be electrically connected, the input terminal electricity of the output terminal of the phase sensitive demodulator circuit 130 and the integrating circuit 140
Connection, the output terminal of the integrating circuit 140 and the input terminal of the voltage controlled oscillator 150 are electrically connected, the voltage controlled oscillation
The output terminal of device 150 is electrically connected with the input terminal of the counting circuit 160.
Referring to Fig. 3, Fig. 3 shows the output signal of rotary transformer and the connection diagram of scaling multiplication circuit 110.
In this present embodiment, the scaling multiplication circuit 110 is used for the angle signal in the output signal of rotary transformer with presetting
Digital angle value signal difference ask to obtain exchange error signal, for example, the preset digital angle value signal isPlease
Refering to Fig. 4, optionally, in this present embodiment, the scaling multiplication circuit 110 include the first amplifier A2, the second amplifier A3,
The input terminal of section choosing switch, D/A converting circuit and third amplifier A4, the first amplifier A2 is used to access the rotation
SIN signals in the output signal of transformer, the first input end electricity of the output terminal of the first amplifier A2 and described section of choosing switch
Property connection；The input terminal of the second amplifier A3 is used for the COS signals in the output signal for accessing the rotary transformer, the
The output terminal of two amplifier A3 and the second input terminal of described section of choosing switch are electrically connected, the described section of output terminal for selecting switch and institute
The input terminal for stating D/A converting circuit is electrically connected, and the output terminal of the D/A converting circuit is defeated with the third amplifier A4's
Enter end electrical connection, the output terminal of the third amplifier A4 is electrically connected with the input terminal of the filter circuit 120.Optionally,
The third amplifier A4 is subtracting amplifier.
What two signals of rotating transformer (or selsyn signal) of input subtracted each other in scaling multiplication circuit 110 obtainsAfter trigonometric function is converted, angle, θ and preset number in input signal can obtain
Word angleDifference functionThe π f of wherein ω=2REF, fREFOn the basis of frequency.
Referring to Fig. 5, the filter circuit 120 is used to eliminate the DC maladjustment in the exchange error signal, height is filtered out
Frequency noise, the filter circuit 120 include first resistor R1, second resistance R2, the first capacitance C1 and the second capacitance C2, and described the
The first end of one resistance R1 is electrically connected with the output terminal of the scaling multiplication circuit 110, the second end of the first resistor R1
The first end connection of one capacitance C1, the second end of the first capacitance C1 and the input terminal of the phase sensitive demodulator circuit 130
It is electrically connected, between the second capacitance C2, the second resistance R2 parallel connection and the second end and ground of the first capacitance C1.
The function of filter circuit 120 is to eliminate any DC maladjustment, reduction selsyn signal or signals of rotating transformer
The noise content of input, so as to reach phase sensitive detection circuit and influence to export.First resistor R1 and the second capacitance C2 can be saved
(in the case, R2=R3 and C1=C3) is removed, but if there are noises for the power supply of translative mode and brushless motor driving, is then filtered
Wave circuit 120 should include the use of first resistor R1 and the second capacitance C2.Value should be properly selected so that
15k Ω≤R1=R2≤56k Ω.
C1=C2=1/ (2 π * R1*fREF)。
Wherein, fREFOn the basis of frequency.
The phase sensitive demodulator circuit 130 is obtained with the integrating circuit 140 for demodulating the error signal that exchanges
Direct current signal, the voltage controlled oscillator 150 are used to obtain direct current signal generation skill according to the demodulation exchange error signal
Art pulse controls the counting circuit 160 to be counted and generates new digital angle value signal.
Optionally, the phase sensitive demodulator circuit 130 can be phase-sensitive demodulator.
Counting circuit 160 carries out plus-minus counting to the counting pulse and generates digital angle valueValue.After changing simultaneously
'sAgain through entire conversion loop transition count, so as to constantly reduce θ withBetween difference, untilIt is zero, in this way
The digital angle signal stored in counting just represents the value of the analog angle signal θ of input.
The voltage controlled oscillator 150 is substantially used as the simple integral device of a pair of of DC level comparator input.Whenever
Integrator exports the threshold voltage for reaching one of amplifier, and integrator input will inject fixed charge, to balance input
Electric current.Meanwhile counter can beat upward or downward, be specifically dependent upon the polarity of input current.
In this present embodiment, the counting circuit 160 is forward-backward counter.
The output circuit 103 is electrically connected with the forward-backward counter, and in this present embodiment, the output circuit 103 wraps
Latch is included, the data of latch and the data of counter are consistent, for storing the forward-backward counter generationValue,
When outside needs to read data, the output state of latch is controlled, exports latch.
Second embodiment
A kind of shaft angle signal conversion equipment (not shown), the shaft angle signal conversion equipment includes display circuit and shaft angle is believed
Number conversion circuit 10, the display circuit is electrically connected with the output circuit 103, for showing the digital angle value signal.
It should be noted that shaft angle signal conversion circuit 10 provided in this embodiment, structure composition and basic principle with
The shaft angle signal conversion circuit 10 that first embodiment is provided is essentially identical, and the present embodiment no longer elaborates again, this reality
It applies example and does not introduce detailed part, please refer to the related content in first embodiment.
Optionally, the display circuit is light-emitting diode display.The light-emitting diode display is displayed for the digital angle
Value.
In conclusion a kind of shaft angle signal conversion circuit provided by the utility model and device, including input circuit, servo
Track circuit and output circuit.The servo tracking circuit includes scaling multiplication circuit, filter circuit, phase sensitive demodulation electricity
Road, integrating circuit, voltage controlled oscillator and counting circuit, will by the way of ratio tracking conversion by servo tracking circuit
Rotation becomes form input signal and is converted to parallel natural binary digital signal, can provide the analog signal proportional to speed,
It can be good at inhibiting noise, small power consumption has the advantages that with high accuracy.
The above descriptions are merely preferred embodiments of the present invention, is not intended to limit the utility model, for this
For the technical staff in field, various modifications and changes may be made to the present invention.It is all in the spirit and principles of the utility model
Within, any modification, equivalent replacement, improvement and so on should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of shaft angle signal conversion circuit, which is characterized in that the shaft angle signal conversion circuit includes：Input circuit, servo
Circuit and output circuit are tracked, the input terminal of the input circuit is used to access the output signal of rotary transformer, the rotation
The output signal for changing depressor includes SIN signals and COS signals, input terminal and the input circuit of the servo tracking circuit
Output terminal electrical connection, the servo tracking circuit for servo tracking circuit be used for according to the output of the rotary transformer believe
Angle signal generation digital angle value signal in number, output terminal and the output circuit of the servo tracking circuit are electrically connected
It connects, for exporting the digital angle value signal to the output circuit.
2. shaft angle signal conversion circuit as described in claim 1, which is characterized in that the servo tracking circuit multiplies including ratio
Method circuit, filter circuit, phase sensitive demodulator circuit, integrating circuit, voltage controlled oscillator and counting circuit, the scaling multiplication
The input terminal of circuit is electrically connected with the output terminal of the input circuit, for the angle letter in the output signal by rotary transformer
It number carries out that difference is asked to obtain exchanging error signal, the output terminal of the scaling multiplication circuit and institute with preset digital angle value signal
The input terminal for stating filter circuit is electrically connected, the input terminal of the output terminal of the filter circuit and the phase sensitive demodulator circuit
It is electrically connected, the filter circuit is used to eliminate the DC maladjustment in the exchange error signal, filters out high frequency noise, the phase
The output terminal of the sensitive demodulator circuit in position is electrically connected with the input terminal of the integrating circuit, the output terminal of the integrating circuit with it is described
The input terminal of voltage controlled oscillator is electrically connected, and the phase sensitive demodulator circuit is used to demodulate described exchange with the integrating circuit
Error signal obtains direct current signal, and the output terminal of the voltage controlled oscillator is electrically connected with the input terminal of the counting circuit, described
Voltage controlled oscillator is used to obtain direct current signal generation technology pulse according to the demodulation exchange error signal, controls the meter
Number circuit is counted and generates new digital angle value signal.
3. shaft angle signal conversion circuit as claimed in claim 2, which is characterized in that the counting circuit and the scaling multiplication
Circuit is electrically connected, and the counting circuit is used to the digital angle value of generation being sent to the scaling multiplication circuit and rotation change
Angle signal in the output signal of depressor, which is compared, seeks difference until the digital angle value signal is equal to the rotation transformation
Angle signal in the output signal of device.
4. shaft angle signal conversion circuit as claimed in claim 3, which is characterized in that the output circuit includes latch, institute
It states latch to be electrically connected with the counting circuit, the latch is used to store the digital angle value of the counting circuit generation
Signal.
5. shaft angle signal conversion circuit as claimed in claim 2, which is characterized in that the scaling multiplication circuit is put including first
Big device, the second amplifier, section choosing switch, D/A converting circuit and third amplifier, the input terminal of first amplifier are used for
Access the SIN signals in the output signal of the rotary transformer, the of the output terminal of the first amplifier and described section of choosing switch
One input terminal is electrically connected；The input terminal of second amplifier is used to access in the output signal of the rotary transformer
COS signals, the output terminal of the second amplifier and the second input terminal of described section of choosing switch are electrically connected, and described section is selected the defeated of switch
Outlet and the input terminal of the D/A converting circuit are electrically connected, and the output terminal of the D/A converting circuit amplifies with the third
The input terminal electrical connection of device, the output terminal of the third amplifier are electrically connected with the input terminal of the filter circuit.
6. shaft angle signal conversion circuit as claimed in claim 5, which is characterized in that the third amplifier amplifies for subtraction
Device.
7. shaft angle signal conversion circuit as claimed in claim 2, which is characterized in that the filter circuit include first resistor,
Second resistance, the first capacitance and the second capacitance, the first end of the first resistor and the output terminal electricity of the scaling multiplication circuit
Connection, the first end connection of the first capacitance of second end of the first resistor, second end and the phase of first capacitance
The input terminal of sensitive demodulator circuit is electrically connected, second capacitance, the second resistance parallel connection and first capacitance the
Between two ends and ground.
8. shaft angle signal conversion circuit as described in claim 1, which is characterized in that the input circuit includes signal condition electricity
Road, the signal conditioning circuit are used to the output signal of rotary transformer carrying out transformation processing.
9. a kind of shaft angle signal conversion equipment, which is characterized in that the shaft angle signal conversion equipment includes display circuit and as weighed
Profit requires the shaft angle signal conversion circuit described in 1~8 any one, and the display circuit is electrically connected with the output circuit, uses
In the display digital angle value signal.
10. shaft angle signal conversion equipment as claimed in claim 9, which is characterized in that the display circuit is light-emitting diode display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721776453.9U CN207543088U (en) | 2017-12-18 | 2017-12-18 | Shaft angle signal conversion circuit and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721776453.9U CN207543088U (en) | 2017-12-18 | 2017-12-18 | Shaft angle signal conversion circuit and device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110208724A (en) * | 2019-04-28 | 2019-09-06 | 北京锐达芯集成电路设计有限责任公司 | A kind of chip |
| CN110220595A (en) * | 2019-04-28 | 2019-09-10 | 北京锐达芯集成电路设计有限责任公司 | A kind of chip |
-
2017
- 2017-12-18 CN CN201721776453.9U patent/CN207543088U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110208724A (en) * | 2019-04-28 | 2019-09-06 | 北京锐达芯集成电路设计有限责任公司 | A kind of chip |
| CN110220595A (en) * | 2019-04-28 | 2019-09-10 | 北京锐达芯集成电路设计有限责任公司 | A kind of chip |
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