CN113659990A - Double-bandwidth integrating circuit in rotary-to-digital converter and switching control method - Google Patents
Double-bandwidth integrating circuit in rotary-to-digital converter and switching control method Download PDFInfo
- Publication number
- CN113659990A CN113659990A CN202110798537.7A CN202110798537A CN113659990A CN 113659990 A CN113659990 A CN 113659990A CN 202110798537 A CN202110798537 A CN 202110798537A CN 113659990 A CN113659990 A CN 113659990A
- Authority
- CN
- China
- Prior art keywords
- digital converter
- circuit
- bandwidth
- switching control
- resolution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
- H03M1/50—Analogue/digital converters with intermediate conversion to time interval
- H03M1/52—Input signal integrated with linear return to datum
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Analogue/Digital Conversion (AREA)
Abstract
The invention relates to a double-bandwidth integrating circuit in a rotary-to-digital converter and a switching control method, wherein a switching control circuit is arranged to be matched with the double-bandwidth integrating circuit, the switching control circuit consists of an operational amplifier, a logic gate, an analog switch, a resistor and a capacitor, switching control is realized by receiving an output signal Ue of a phase demodulation circuit in the rotary-to-digital converter, a component selection signal SHIFT and a pre-charge amplification multiple control signal UP/DN, and finally, a speed voltage VEL is output to a voltage control circuit in the digital converter to complete the conversion from rotary to digital. Compared with the traditional rotary transformer-to-digital conversion circuit, the invention provides two groups of bandwidth component selections in the internal integral circuit of the converter, and can realize the switching between the requirements of low resolution and high rotating speed and the requirements of high resolution and low rotating speed.
Description
Technical Field
The invention relates to the technical field of conversion from analog signals to digital signals, in particular to a double-bandwidth integrating circuit in a rotary-to-digital converter, and also relates to a switching control method of the double-bandwidth integrating circuit in the rotary-to-digital converter.
Background
The rotary transformer-to-digital converter is one of key devices in a servo control system, is used for digitally converting position/angle analog quantity in the system, and is connected with an upper computer through a standard interface circuit to realize real-time reading of position/angle data information; the rotary-to-digital converter product is mainly applied to important weapon systems such as spaceflight, aviation, weapons, ships and warships and the like.
A signal conditioning circuit, a solid-state control transformer, alternating current amplification, synthetic reference, phase demodulation, an integrator, a voltage-controlled oscillator, a reversible counter and the like are usually designed in the rotary transformer-to-digital converter, so that the conversion from the rotary transformer to the digital signal can be realized; an integrating circuit in the existing converter is a single-bandwidth integrating circuit, can only meet one function of high rotating speed, low resolution or low rotating speed and high resolution, and cannot be switched rapidly between the requirement of high rotating speed and the requirement of high resolution; the prior art does not meet the requirements when the system has different requirements for high rotational speed and high resolution at different points in time.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides a double-bandwidth integration circuit in a resolver-to-digital converter, which can realize switching between low resolution and high rotation speed requirements and between high resolution and low rotation speed requirements.
Another technical problem to be solved by the present invention is to provide a switching control method for a dual bandwidth integrator circuit in a resolver-to-digital converter as described above.
The technical problem to be solved by the present invention is achieved by the following technical means. The invention relates to a double-bandwidth integrating circuit in a rotary-to-digital converter, which comprises a bandwidth component 1, wherein the bandwidth component 1 is used for meeting the requirements of the converter on low resolution and high rotating speed, the bandwidth component 1 comprises a resistor Rb1, a capacitor Cbw1 and a capacitor Cbw1/10, the resistor Rb1 and the capacitor Cbw1 are connected in series and then are connected in parallel with the capacitor Cbw1/10,
the bandwidth component 2 is used for meeting the requirements of high resolution and low rotating speed of the converter, the bandwidth component 2 comprises a resistor Rb2, a capacitor Cbw2 and a capacitor Cbw2/10, and the resistor Rb2 and the capacitor Cbw2 are connected in series and then are connected in parallel with the capacitor Cbw 2/10.
The technical problem to be solved by the present invention can be further solved by the following technical solutions, wherein for the above-mentioned switching control method of the dual-bandwidth integrator circuit in the resolver-to-digital converter, the method uses the dual-bandwidth integrator circuit in the resolver-to-digital converter according to claim 1, the method sets a switching control circuit to cooperate with the integrator circuit, the switching control circuit includes an operational amplifier, a logic gate, an analog switch, a resistor and a capacitor;
the switching control circuit receives an output signal Ue of a phase demodulation circuit in the resolver-to-digital converter, realizes switching control on the integrating circuit through a component selection signal SHIFT and a pre-charge amplification factor control signal UP/DN, and finally outputs a speed voltage VEL to a voltage control circuit in the resolver-to-digital converter to complete the conversion from the resolver to the digital converter.
The technical problem to be solved by the present invention can be further solved by the following technical solution, that is, for the above-mentioned switching control method of the dual bandwidth integration circuit in the resolver-to-digital converter, when the bandwidth component 1 participates in the switching control, the bandwidth component 2 is precharged to a desired voltage, and the component selection signal SHIFT is switched simultaneously with the resolution switching of the resolver-to-digital converter.
The technical problem to be solved by the present invention can be further solved by the following technical solution, for the above-mentioned switching control method of the dual bandwidth integrator circuit in the resolver-to-digital converter, the pre-charge amplification factor control signal UP/DN changes the pre-charge amplification factor by controlling the analog switch, when the resolution is to be increased, UP/DN is logic 0, the pre-charge gain needs to be set to 4 times; when the resolution is to be reduced and UP/DN is logic 1, the gain of precharge needs to be set to 1/4.
The technical problem to be solved by the present invention can be further solved by the following technical solution, that is, for the above-mentioned switching control method of the dual bandwidth integrator circuit in the resolver-to-digital converter, when the resolver-to-digital converter switches at 10-bit, 12-bit, 14-bit, and 16-bit resolutions, the pre-charge amplification factor control signal UP/DN is connected to-5V, and the element selection signal SHIFT is connected to the resolution control bit D1 of the resolver-to-digital converter.
The technical problem to be solved by the present invention can be further solved by the following technical solution, that is, for the above-mentioned switching control method of the dual bandwidth integrator circuit in the resolver-to-digital converter, when the resolver-to-digital converter is switched between 14-bit and 16-bit resolutions, the resolution control bit D1 of the resolver-to-digital converter is connected to the high level +5V, and the pre-charge amplification factor control signal UP/DN, the device selection signal SHIFT, and the resolution control bit D0 are connected.
Compared with the prior art, the double-bandwidth integrating circuit in the rotary-to-digital converter has the advantages that the two groups of bandwidth components can be selected for the integrating circuit in the converter, one group of bandwidth components is used for meeting the requirements of the converter on low resolution and high rotating speed, the other group of bandwidth components is used for meeting the requirements of the converter on high resolution and low rotating speed, the fast switching between the requirements of the converter on low resolution and high rotating speed and the requirements of the converter on high resolution and low rotating speed can be realized, and the actual use requirements can be better met.
Drawings
FIG. 1 is a circuit diagram of a dual bandwidth integration and switching control circuit of the present invention;
FIG. 2 is a diagram of the transfer function of the resolver to digital converter of the present invention;
FIG. 3 is a diagram of external connections for switching at 10-bit, 12-bit, 14-bit, and 16-bit resolutions according to the present invention;
fig. 4 is a diagram of the external connections for switching at 14-bit and 16-bit resolutions according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, a dual bandwidth integrator circuit in a rotary to digital converter provides two sets of bandwidth components: the bandwidth assembly 1 comprises a resistor Rb1, a capacitor Cbw1 and a capacitor Cbw1/10 and is used for meeting the requirements of low resolution and high rotating speed of the converter;
the bandwidth assembly 2 comprises a resistor Rb2, a capacitor Cbw2 and a capacitor Cbw2/10 and is used for meeting the requirements of high resolution and low rotating speed of the converter;
a switching control method of a double-bandwidth integrating circuit in a rotary transformer-to-digital converter realizes switching control by setting a switching control circuit to be matched with an integrating circuit, wherein the switching control circuit consists of an operational amplifier, a logic gate, an analog switch, a resistor and a capacitor, receives an output signal Ue of a phase demodulation circuit in the rotary transformer-to-digital converter, realizes switching control by a component selection signal SHIFT and a pre-charge amplification multiple control signal UP/DN, outputs a speed voltage VEL as a speed voltage, and provides the speed voltage to a voltage control circuit in the rotary transformer-to-digital converter to finish the conversion from the rotary transformer to the digital; compared with a traditional rotary transformer-to-digital conversion circuit, the converter internal integration circuit has two groups of bandwidth components which can be selected, and can realize quick switching between low resolution and high rotation speed requirements and between high resolution and low rotation speed requirements;
the component selection signal SHIFT is used to select whether to use the bandwidth component 1 or the bandwidth component 2, and when the component selection signal is a high-level logic "1", the bandwidth component 1 is selected; when the device select signal is a low level logic "0", bandwidth device 2 is selected;
the pre-charge amplification control signal UP/DN is used to change the gain of the operational amplifier that drives the set of unselected bandwidth components; UP/DN has 3 input states, and the following table describes the relationship between input and gain;
TABLE 1 PRECHARGE OPERATING AMPLIFIER GAIN PROGRAMMING TABLE
The tracking speed can be increased by 4 times (for example, 16-bit resolution is reduced to 14 bits) for each 1 st order of resolution reduction in the rotation-to-digital converter; meanwhile, when the resolution is reduced by 1 order, the speed voltage is reduced by 4 times in proportion; for example, when the speed voltage output range is 10rps at 4V =16 bit resolution, the speed voltage range of 10rps is 1V at 14 bit resolution for the same converter; to avoid glitches in the speed voltage output, the bandwidth component 2 is precharged to the desired voltage and the component select signal SHIFT is switched on and off simultaneously with the resolution switch, thus resulting in a smooth speed voltage transition while greatly reducing errors and settling time;
the pre-charge amplification factor control signal UP/DN can change the pre-charge amplification factor by controlling the analog switch; when the converter resolution is to be increased (UP/DN is also logic 0), the gain of the precharge is set to 4 times; when the converter resolution is to be reduced (UP/DN is also logic 1), the gain of the precharge is set to 1/4; switching the gain of the precharged operational amplifier prior to switching the resolution of the converter, such that there is sufficient time for the device precharge to settle to the matching voltage, the time being determined by the time constant of the device change;
secondly, the pre-charge amplification control signal UP/DN can pre-charge the capacitor before switching from one set of bandwidth components to another set of bandwidth components when the resolution is switched from the outside, and the logic of the pre-charge amplification control signal (UP/DN) is as follows:
TABLE 2 Pre-charge amplification control signal (UP/DN) logic
Fig. 2 is a diagram of a transfer function of a resolver-to-digital converter, and it can be seen from the transfer function that the input of a switching control circuit is an output signal Ue of a phase demodulation circuit in the resolver-to-digital converter, the output is a speed voltage VEL, the speed voltage is input to a voltage control circuit after being integrated, and finally, the resolver-to-digital conversion is completed;
the rotary to digital converter switches at 10-bit, 12-bit, 14-bit, 16-bit resolution, then the precharge op-amp can continuously supply the corresponding voltage value to the unselected components, resulting in the fastest switch to switch; the example of fig. 3 gives a diagram of the external connections how switching is satisfied at 10-bit, 12-bit, 14-bit, 16-bit resolutions.
The rotary to digital converter switches only in two resolution modes (e.g., 14 bits and 16 bits), then the precharge op-amp can continuously supply the corresponding voltage values to the unselected components, resulting in the fastest switch to switch; the example of fig. 4 gives a diagram of the external connections how switching is satisfied at 14-bit and 16-bit resolutions.
Claims (6)
1. A dual bandwidth integrator circuit in a rotary to digital converter, comprising: the integrating circuit comprises a bandwidth component 1, wherein the bandwidth component 1 is used for meeting the requirements of low resolution and high rotating speed of a converter, the bandwidth component 1 comprises a resistor Rb1, a capacitor Cbw1 and a capacitor Cbw1/10, the resistor Rb1 and the capacitor Cbw1 are connected in series and then are connected in parallel with the capacitor Cbw1/10,
the bandwidth component 2 is used for meeting the requirements of high resolution and low rotating speed of the converter, the bandwidth component 2 comprises a resistor Rb2, a capacitor Cbw2 and a capacitor Cbw2/10, and the resistor Rb2 and the capacitor Cbw2 are connected in series and then are connected in parallel with the capacitor Cbw 2/10.
2. A switching control method for a dual bandwidth integrator circuit in a resolver to digital converter, comprising: the method uses the dual bandwidth integrator circuit of claim 1, the method providing a switching control circuit in cooperation with the integrator circuit, the switching control circuit comprising an operational amplifier, a logic gate, an analog switch, a resistor, and a capacitor;
the switching control circuit receives an output signal Ue of a phase demodulation circuit in the resolver-to-digital converter, realizes switching control on the integrating circuit through a component selection signal SHIFT and a pre-charge amplification factor control signal UP/DN, and finally outputs a speed voltage VEL to a voltage control circuit in the resolver-to-digital converter to complete the conversion from the resolver to the digital converter.
3. The switching control method of the dual bandwidth integration circuit in a resolver to digital converter according to claim 2, wherein: while the bandwidth component 1 participates in the switching control, the bandwidth component 2 is precharged to a desired voltage, and the component selection signal SHIFT is switched simultaneously with the resolution switching of the rotary-to-digital converter.
4. The switching control method of the dual bandwidth integration circuit in a resolver to digital converter according to claim 2, wherein: the pre-charge amplification control signal UP/DN changes the pre-charge amplification through controlling the analog switch, when the resolution is to be increased, the UP/DN is logic 0, and the pre-charge gain is required to be set to be 4 times; when the resolution is to be reduced and UP/DN is logic 1, the gain of precharge needs to be set to 1/4.
5. The switching control method of the dual bandwidth integration circuit in a resolver to digital converter according to claim 2, wherein: when the rotary to digital converter is switched under the resolution of 10 bits, 12 bits, 14 bits and 16 bits, the pre-charge amplification control signal UP/DN is connected to-5V, and the component selection signal SHIFT is connected to the resolution control bit D1 of the rotary to digital converter.
6. The switching control method of the dual bandwidth integration circuit in a resolver to digital converter according to claim 2, wherein: when the resolver-to-digital converter is switched between 14-bit and 16-bit resolutions, the resolution control bit D1 of the resolver-to-digital converter is connected to +5V, and the precharge amplification control signal UP/DN, the cell selection signal SHIFT, and the resolution control bit D0 are connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110798537.7A CN113659990A (en) | 2021-07-15 | 2021-07-15 | Double-bandwidth integrating circuit in rotary-to-digital converter and switching control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110798537.7A CN113659990A (en) | 2021-07-15 | 2021-07-15 | Double-bandwidth integrating circuit in rotary-to-digital converter and switching control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113659990A true CN113659990A (en) | 2021-11-16 |
Family
ID=78477421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110798537.7A Pending CN113659990A (en) | 2021-07-15 | 2021-07-15 | Double-bandwidth integrating circuit in rotary-to-digital converter and switching control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113659990A (en) |
-
2021
- 2021-07-15 CN CN202110798537.7A patent/CN113659990A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7023372B1 (en) | Method and apparatus for segmented, switched analog/digital converter | |
| US6600437B1 (en) | High resolution, high speed, low power switched capacitor digital to analog converter | |
| US4831381A (en) | Charge redistribution A/D converter with reduced small signal error | |
| US5471210A (en) | Analog digital converter | |
| US5721503A (en) | Flash analog-to-digital converter with latching exclusive or gates | |
| JPS6331315A (en) | Monolithic integrated digital/analog converter | |
| JPS6360568B2 (en) | ||
| JPH06152420A (en) | A/d converter | |
| US20140354458A1 (en) | Sar analog-to-digital conversion method and sar analog-to-digital conversion circuit | |
| US8823566B2 (en) | Analog to digital conversion architecture and method with input and reference voltage scaling | |
| JPH0566774B2 (en) | ||
| US5444447A (en) | Analog-digital converter with distributed sample-and-hold circuit | |
| CN106301376B (en) | Low-power-consumption successive approximation type analog-to-digital converter with adjustable comparator bias current | |
| CN105978571A (en) | Successive approximation analog to digital converter suitable for single and double end input | |
| US7436341B2 (en) | Digital/analog converting apparatus and digital/analog converter thereof | |
| US9819354B2 (en) | Reference voltage generator and analog-to-digital converter | |
| CN102075192A (en) | High speed digital-analog conversion circuit and operating method thereof | |
| US9197231B1 (en) | Systems and methods for data conversion | |
| US6232907B1 (en) | Polarity shifting flash A/D converter and method | |
| CN113659990A (en) | Double-bandwidth integrating circuit in rotary-to-digital converter and switching control method | |
| CN113162623A (en) | Conversion circuit and digital-to-analog converter based on resistance voltage division and capacitance integration | |
| US6927723B2 (en) | A/D converter and A/D conversion method | |
| CN107888196B (en) | Digital-to-analog conversion circuit | |
| US6812880B2 (en) | Analog-to-digital converter and method for converting an analog signal into a digital signal | |
| KR900005464B1 (en) | An untrimmed 12 bit montonic all capacitive a to d converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |