CN105680867A - Frequency voltage conversion circuit, signal judging circuit and signal feedback circuit - Google Patents
Frequency voltage conversion circuit, signal judging circuit and signal feedback circuit Download PDFInfo
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- CN105680867A CN105680867A CN201610018130.7A CN201610018130A CN105680867A CN 105680867 A CN105680867 A CN 105680867A CN 201610018130 A CN201610018130 A CN 201610018130A CN 105680867 A CN105680867 A CN 105680867A
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/66—Digital/analogue converters
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Abstract
The invention relates to the technical field of an electric appliance circuit, specifically relates to a frequency voltage conversion circuit, a signal judging circuit and a signal feedback circuit. The frequency voltage conversion circuit comprises a signal input end, a signal output end, a grounding end, an excitation response capacitor, a guiding diode, a free-wheeling diode, an energy storing capacitor and a precision adjusting resistor; wherein one end of the excitation response capacitor is connected with the signal input end; the other end is connected with the input end of the guiding diode; the output end of the guiding diode is connected with the signal output end; the input end of the free-wheeling diode is connected with the grounding end; the output end is connected with the input end of the guiding diode; one end of the energy storing capacitor and one end of the precision adjusting resistor are connected with the grounding end; and the other ends are connected with the signal output end. The circuits are universally applicable to alternating current large-amplitude oscillation signals and have wider application ranges.
Description
Technical field
The present invention relates to appliance circuit technical field, in particular to a kind of frequency-voltage conversion circuit, signal judging circuit and signal feedback circuit.
Background technology
In signal processing or control technology, for instance in fields such as motor frequency conversion controls, it is often necessary to the frequency signal exported of signal source is converted to voltage signal. Frequency signal is converted to the process of voltage signal, it is simply that between frequency and voltage, there is a linear approximate relationship, the frequency signal of certain characteristic and corresponding to a specific voltage signal.
The method being currently used for realizing voltage to frequency conversion is generally the frequency values being read in signal source by PLD, then according to predetermined requirement exports corresponding voltage. But the method for this voltage to frequency conversion is limited to and can only process particular kind of signal, such as voltage amplitude can not too high can not be too low, PLD can only read direct current signal, process will be re-started for AC signal, the undesirable frequency signal of amplitude, be of limited application.
Summary of the invention
In view of this, the purpose of the embodiment of the present invention is in that to provide a kind of frequency frequency-voltage conversion circuit, signal judging circuit and signal feedback circuit, it is possible to being generally applicable to exchange significantly oscillator signal, range of application is wider.
First aspect, embodiments provides a kind of frequency-voltage conversion circuit, including: signal input part, signal output part, earth terminal, exciter response electric capacity, steering diode, fly-wheel diode, storage capacitor and precision regulate resistance;
Wherein, one end of described exciter response electric capacity is connected with described signal input part, and the other end is connected with the input of described steering diode; The outfan of described steering diode is connected with described signal output part;
The input of described fly-wheel diode is connected with described earth terminal, and outfan is connected with the input of described steering diode;
Described storage capacitor and described precision regulate one end of resistance and are all connected with described earth terminal, and the other end is all connected with described signal output part.
In conjunction with first aspect, embodiments provide the first possible embodiment of first aspect, wherein:
Also include: flat wave capacitor;
One end of described flat wave capacitor is connected with described signal output part, and the other end is connected with described earth terminal.
In conjunction with first aspect, embodiments provide the embodiment that the second of first aspect is possible, wherein:
Also include: signal source;
Described signal source includes two incoming ends;
One of them described incoming end is connected with described signal input part;
Incoming end described in another one is connected with described earth terminal.
Second aspect, the embodiment of the present invention also provides for a kind of signal judging circuit, including: judging treatmenting module and the frequency-voltage conversion circuit as described in above-mentioned first aspect;
Described judging treatmenting module has one or more;
It is up to a judging treatmenting module be connected with the signal input part of described frequency-voltage conversion circuit;
Other described judging treatmenting modules are all connected with the signal output part of described frequency-voltage conversion circuit.
In conjunction with second aspect, embodiments providing the first possible embodiment of second aspect, described frequency-voltage conversion circuit is also associated with filter amplification circuit.
In conjunction with second aspect, embodiments providing the embodiment that the second of second aspect is possible, described judging treatmenting module includes: comparator.
The third aspect, the embodiment of the present invention also provides for a kind of signal feedback circuit, including: conversion module and the frequency-voltage conversion circuit as described in above-mentioned first aspect;
Wherein, described conversion module includes figure signal input and figure signal outfan;
Described figure signal input is connected with the signal output part of described frequency-voltage conversion circuit;
Described figure signal outfan is for being connected with signal source.
In conjunction with the third aspect, embodiments providing the first possible embodiment of second aspect, described conversion module includes:
Feedback signal precision regulates resistance;
Or, described conversion module includes:
Feedback signal precision regulates resistance and comparator;
Wherein, described signal accuracy regulates resistance and is connected with described frequency-voltage conversion circuit, and described comparator is connected with described signal source.
In conjunction with the third aspect, embodiments provide the embodiment that the second of second aspect is possible,
The signal input part of described frequency-voltage conversion circuit is also associated with toggle switch; The signal input part of described toggle switch is also associated with signal frequency split module.
In conjunction with the third aspect, embodiments provide the third possible embodiment of second aspect,
Signal input part or the signal output part of described frequency-voltage conversion circuit are also associated with filter amplification circuit.
Frequency-voltage conversion circuit, signal judging circuit and the signal feedback circuit that the embodiment of the present invention provides, signal input part is for connecting with signal source (being namely used for the equipment to frequency-voltage conversion circuit input frequency signal), time signal source is to frequency-voltage conversion circuit input frequency signal, the voltage of signal input part can change along with the change of frequency signal, namely when frequency signal is how many times, excitation corresponding capacitance connects the voltage of signal input part is exactly how many. And signal source output frequency signal to the moment of high voltage saltus step, exciter response electric capacity two ends are in a high voltage, now, steering diode be switched on, storage capacitor charge, and storage capacitor connect signal output part a terminal voltage increase; When the frequency signal of signal source output is from high voltage saltus step to the moment of low pressure, the voltage at excitation corresponding capacitance two ends reduces simultaneously, make the voltage of one end that excitation corresponding capacitance the is connected voltage lower than earth terminal with steering diode, fly-wheel diode is switched under this voltage, reversely charges to exciter response electric capacity; Meanwhile, storage capacitor regulates conductive discharge by precision. At the next one by mortgaging the saltus step moment to high pressure, repeat the process of above-mentioned charging and electric discharge. And then be finally completed frequency signal is converted into voltage signal, and final the exported voltage that voltage signal machine is storage capacitor. This frequency-voltage conversion circuit simple in construction, it is possible to being generally applicable to exchange significantly oscillator signal, range of application is wider.
For making the above-mentioned purpose of the present invention, feature and advantage to become apparent, preferred embodiment cited below particularly, and coordinate appended accompanying drawing, it is described in detail below.
Accompanying drawing explanation
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, the accompanying drawing used required in embodiment will be briefly described below, it is to be understood that, the following drawings illustrate only certain embodiments of the present invention, therefore the restriction to scope it is not construed as, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other relevant accompanying drawings according to these accompanying drawings.
Fig. 1 illustrates the physical circuit figure of a kind of frequency signal voltage conversion circuit that the embodiment of the present invention provides;
Fig. 2 illustrates the structural representation of a kind of signal judging circuit that the embodiment of the present invention provides;
Fig. 3 illustrates the physical circuit figure of a kind of signal judging circuit that the embodiment of the present invention provides;
Fig. 4 illustrates the physical circuit figure of the another kind of signal judging circuit that the embodiment of the present invention provides;
Fig. 5 illustrates the structural representation of a kind of signal feedback circuit that the embodiment of the present invention provides;
Fig. 6 illustrates the physical circuit figure of a kind of signal feedback circuit that the embodiment of the present invention provides;
Fig. 7 illustrates the physical circuit figure of the another kind of signal feedback circuit that the embodiment of the present invention provides.
Detailed description of the invention
Below in conjunction with accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments. Generally can with various different configurations arrange and design with the assembly of the embodiment of the present invention that illustrate described in accompanying drawing herein. Therefore, below the detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit claimed the scope of the present invention, but is merely representative of the selected embodiment of the present invention. Based on embodiments of the invention, the every other embodiment that those skilled in the art obtain under the premise not making creative work, broadly fall into the scope of protection of the invention.
The method being currently used for realizing voltage to frequency conversion reads in signal source generally by programmable logic device, then according to predetermined voltage requirements exports corresponding voltage. This frequency conversion method is limited to and can only process particular kind of signal. Such as voltage amplitude can not too high can not be too low, PLD can only read direct current signal and can not read the pungent signal of exchange, cause that current this voltage to frequency conversion method is of limited application, based on this, a kind of frequency-voltage conversion circuit, signal judging circuit and the signal feedback circuit that the application provides, can realizing the optional frequency conversion to voltage, range of application is wider.
For ease of the present embodiment is understood, first a kind of frequency-voltage conversion circuit disclosed in the embodiment of the present invention is described in detail,
It should be noted that, in describing the invention, orientation or the position relationship of the instruction such as term " " center ", " on ", D score, "left", "right", " vertically ", " level ", " interior ", " outward " be based on orientation shown in the drawings or position relationship; be for only for ease of the description present invention and simplifying and describe; rather than instruction or imply indication device or element must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention. Additionally, term " first ", " second ", " the 3rd " are only for descriptive purposes, and it is not intended that indicate or hint relative importance.
It addition, in describing the invention, unless otherwise clearly defined and limited, term " installation ", " being connected ", " connection " should be interpreted broadly, for instance, it is possible to it is fixing connection, it is also possible to be removably connect, or connect integratedly; Can be mechanically connected, it is also possible to be electrical connection; Can be joined directly together, it is also possible to be indirectly connected to by intermediary, it is possible to be the connection of two element internals. For the ordinary skill in the art, it is possible to concrete condition understands above-mentioned term concrete meaning in the present invention.
Shown in Figure 1, the frequency-voltage conversion circuit that the embodiment of the present invention provides includes: signal input part IN, signal output part VOUT, earth terminal GND, exciter response electric capacity C1, steering diode D1, sustained diode 2, storage capacitor C2 and precision regulate resistance R1;
Wherein, one end of described exciter response electric capacity C1 is connected with described signal input part IN, and the other end is connected with the input of described steering diode D1; The outfan of described steering diode D1 is connected with described signal output part VOUT;
The input of described sustained diode 2 is connected with described earth terminal GND, and outfan is connected with the input of described steering diode D1;
Described storage capacitor C2 and described precision regulate one end of resistance R1 and are all connected with described earth terminal GND, and the other end is all connected with described signal output part VOUT.
In the frequency-voltage conversion circuit that the embodiment of the present invention provides, signal input part IN is for connecting with signal source (being namely used for the equipment to frequency-voltage conversion circuit input frequency signal), time signal source is to frequency-voltage conversion circuit input frequency signal, the voltage of signal input part IN can change along with the change of frequency signal, namely when frequency signal is how many times, excitation corresponding capacitance connects the voltage of signal input part IN is exactly how many. And at the frequency signal of signal source output to the moment of high voltage saltus step, exciter response electric capacity C1 two ends are in a high voltage, and now, steering diode D1 is switched on, storage capacitor C2 charges, and a terminal voltage of storage capacitor C2 connection signal output part VOUT increases; When the frequency signal of signal source output is from high voltage saltus step to the moment of low pressure, the voltage at excitation corresponding capacitance two ends reduces simultaneously, make the voltage encouraging corresponding capacitance C1 and steering diode D1 one end the being connected voltage lower than earth terminal GND, sustained diode 2 is switched under this voltage, reversely charges to exciter response electric capacity C1; Meanwhile, storage capacitor C2 regulates resistance R1 electric discharge by precision. At the next one by mortgaging the saltus step moment to high pressure, repeat the process of above-mentioned charging and electric discharge. And then be finally completed frequency signal is converted into voltage signal, and final the exported voltage that voltage signal machine is storage capacitor C2. This frequency-voltage conversion circuit simple in construction, it is possible to being generally applicable to exchange significantly oscillator signal, range of application is wider.
For example, it is assumed that the signal that signal is 5V～0V that signal source inputs, being when 0 in the time, output signal is absent from. When time saltus step is the moment of 1, the signal saltus step that signal source exports is to 5V, now, the voltage respectively 5V (link with signal input part IN) and 1V (link with steering diode D1) at exciter response electric capacity C1 two ends, there is the pressure reduction of 4V between two ends; Now the voltage of the link of storage capacitor C2 and signal output part VOUT is 0.7V (the steering diode D1 meeting a part of voltage of loss);When the signal saltus step of signal source to 0V time, due to the moment in signal saltus step, the pressure reduction at exciter response electric capacity C1 two ends is no variation at short notice, therefore encourages the voltage at corresponding capacitance C1 two ends to be changed to 0V (link with signal input part IN) and-4V (link with steering diode D1) respectively; Now, owing to the electromotive force of one end of sustained diode 2 ground connection higher than it and encourages corresponding capacitance C1 one end being connected, thus sustained diode 2 is switched on, the voltage of exciter response electric capacity becomes-0.7 and (is generally 0V, but owing to the time of signal source saltus step is too short, the voltage of one end of the connection sustained diode 2 of exciter response electric capacity is generally all without for 0); When upper once signal saltus step to 5V, the voltage at excitation corresponding capacitance two ends is changed to 5V and 1.2V respectively, then repeats the process of above-mentioned charging and electric discharge. As long as the defeated frequency signal of signal source is in a comparatively appropriate frequency, the voltage at storage capacitor C2 two ends can reach a relatively stable state.
It addition, shown in Figure 1, the embodiment of the present invention also provides for another frequency-voltage conversion circuit, on the basis of above-described embodiment, also includes: flat wave capacitor C3;
One end of described flat wave capacitor C3 is connected with described signal output part VOUT, and the other end is connected with described earth terminal GND.
When implementing, this flat wave capacitor C3 is able to the clutter in filtering circuit so that the voltage that frequency translation becomes is more stable and accurate.
It addition, shown in Figure 1, in the frequency-voltage conversion circuit provided in embodiments of the present invention, also include: signal source;
Described signal source includes two incoming ends;
One of them described incoming end is connected with described signal input part IN;
Incoming end described in another one is connected with described earth terminal GND.
When implementing, signal source can provide frequency signal to frequency-voltage conversion circuit. The frequency signal that this signal source exports can be that digital signal can also analogue signal.
Shown in Fig. 2, Fig. 3 and Fig. 4, the embodiment of the present invention also provides for a kind of signal judging circuit; This signal judging circuit includes: judging treatmenting module and the frequency-voltage conversion circuit as described in above-described embodiment;
Described judging treatmenting module has one or more;
It is up to a judging treatmenting module be connected with the signal input part IN of described frequency-voltage conversion circuit;
Other described judging treatmenting modules are all connected with the signal output part VOUT of described frequency-voltage conversion circuit.
When implementing, the effect being connected to the judging treatmenting module of the signal input part IN of freq converting circuit is usually the size in order to limit the frequency signal being input to freq converting circuit. And the judging treatmenting module being connected to one end of the signal output part VOUT of frequency-voltage conversion circuit be usually the magnitude of voltage in order to be exported by frequency-voltage conversion circuit and contrast with a certain contrast base reference signal, and export corresponding control signal when meeting certain condition.
Such as, will determine that processing module is set to comparator; A specified contrast base reference signal can be set for this comparator; Comparator volume can also be contrasted base reference signal and be set as a variable value. Different practical application request uses different contrast base reference signals.
When implementing, it is possible to realize the adjustment to contrast base reference signal by rheostat.
Such as, in figure 3, including two comparators, wherein, the comparator being connected to the signal input part IN of frequency-voltage conversion circuit provides a specified base reference signal ref, and the signal that signal source exports is as the comparison signal fin of this comparator. The comparator of the signal output part VOUT being connected to frequency-voltage conversion circuit then provides a variable base reference signal ref1 by rheostat RQ1, and exports a road control signal control1.
It addition, in the diagram, can also connecting multiple comparator at the signal output part VOUT of frequency-voltage conversion circuit, the comparison signal input port of each comparator is connected with signal output part VOUT. These multiple comparators, are respectively provided with different base reference signal ref1, ref2 ... refn, and export different control signal control1, control2, controln respectively.
It addition, shown in Figure 2, in various embodiments of the present invention, described frequency-voltage conversion circuit is also associated with filter amplification circuit.
When implementing,
When implementing, filter amplification circuit can be connected to the signal input part IN of frequency-voltage conversion circuit, the signal output part VOUT of frequency-voltage conversion circuit can also be connected to, its objective is at the frequency signal being input to frequency-voltage conversion circuit or the voltage signal that exported by frequency-voltage conversion circuit in too small, by signal filtering and amplify.
Shown in Fig. 5, Fig. 6 and Fig. 7, the embodiment of the present invention also provides for a kind of signal feedback circuit, and this signal feedback circuit includes: conversion module and the frequency-voltage conversion circuit as described in above-described embodiment;
Wherein, described conversion module includes figure signal input and figure signal outfan;
Described figure signal input is connected with the signal output part of described frequency-voltage conversion circuit;
Described figure signal outfan is for being connected with signal source.
When implementing, the conversion module in feedback circuit is generally used for the voltage signal that frequency-voltage conversion circuit is obtained and selectively feeds back to signal source, and the frequency signal to adjust signal source exports.
In this process, this conversion module includes: feedback signal precision regulates resistance RQ1;
Usually, it is power transformation resistance that this feedback signal precision regulates resistance RQ1, and the outfan of power transformation resistance is directly connected with signal source.
Or, this conversion module includes: feedback signal precision regulates resistance RQ1 and comparator;
Wherein, described signal accuracy regulates resistance and is connected with described frequency-voltage conversion circuit, and described comparator is connected with described signal source.
Usually, when including feedback signal precision adjustment resistance RQ1 and comparator when conversion module, feedback signal precision regulates the signal output part of resistance RQ1 and is connected with the signal input part of comparator. When the voltage signal that exports of signal output part that feedback signal precision regulates resistance RQ1 meets a certain condition, this conversion module just can send feedback signal to signal source.
It addition, shown in Figure 6, in each embodiment of the present invention, it is preferable that the signal input part of described frequency-voltage conversion circuit is also associated with toggle switch; The signal input part of described toggle switch is also associated with signal frequency split module.
Frequency signal can be divided by signal frequency split module, such as original frequency signal is 500V, and the frequency signal needed during frequency-voltage conversion circuit working stability is 200V～300V, therefore the signal of 500V can not meet the demand of conversion, therefore can by frequency signal frequency dividing to 250V, and pass through toggle switch, it is possible to the input of channelized frequencies signal is set, and is adjusted the frequency being input in frequency signal change-over circuit by toggle switch.
It addition, shown in Figure 5, in each embodiment of the present invention, it is preferable that signal input part or the signal output part of described frequency-voltage conversion circuit are also associated with filter amplification circuit.
Filter amplification circuit can be connected to the signal input part IN of frequency-voltage conversion circuit, the signal output part VOUT of frequency-voltage conversion circuit can also be connected to, its objective is at the frequency signal being input to frequency-voltage conversion circuit or the voltage signal that exported by frequency-voltage conversion circuit in too small, by signal filtering and amplify.
In addition, it should be noted that above-mentioned signal judging circuit, signal feedback circuit can be seen as frequency-voltage conversion circuit. Both are actually a kind of application of frequency-voltage conversion circuit.
The above; being only the specific embodiment of the present invention, but protection scope of the present invention is not limited thereto, any those familiar with the art is in the technical scope that the invention discloses; change can be readily occurred in or replace, all should be encompassed within protection scope of the present invention. Therefore, protection scope of the present invention should described be as the criterion with scope of the claims.
Claims (10)
1. a frequency-voltage conversion circuit, it is characterised in that including: signal input part, signal output part, earth terminal, exciter response electric capacity, steering diode, fly-wheel diode, storage capacitor and precision regulate resistance;
Wherein, one end of described exciter response electric capacity is connected with described signal input part, and the other end is connected with the input of described steering diode; The outfan of described steering diode is connected with described signal output part;
The input of described fly-wheel diode is connected with described earth terminal, and outfan is connected with the input of described steering diode;
Described storage capacitor and described precision regulate one end of resistance and are all connected with described earth terminal, and the other end is all connected with described signal output part.
2. frequency-voltage conversion circuit according to claim 1, it is characterised in that also include: flat wave capacitor;
One end of described flat wave capacitor is connected with described signal output part, and the other end is connected with described earth terminal.
3. frequency-voltage conversion circuit according to claim 1 and 2, it is characterised in that also include: signal source;
Described signal source includes two incoming ends;
One of them described incoming end is connected with described signal input part;
Incoming end described in another one is connected with described earth terminal.
4. a signal judging circuit, it is characterised in that including: judging treatmenting module and the frequency-voltage conversion circuit as described in the claims 1-3 any one;
Described judging treatmenting module has one or more;
It is up to a judging treatmenting module be connected with the signal input part of described frequency-voltage conversion circuit;
Other described judging treatmenting modules are all connected with the signal output part of described frequency-voltage conversion circuit.
5. signal judging circuit according to claim 4, it is characterised in that described frequency-voltage conversion circuit is also associated with filter amplification circuit.
6. the signal judging circuit according to claim 4 or 5, it is characterised in that described judging treatmenting module includes: comparator.
7. a signal feedback circuit, it is characterised in that including: conversion module and the frequency-voltage conversion circuit as described in the claims 1-3 any one;
Wherein, described conversion module includes figure signal input and figure signal outfan;
Described figure signal input is connected with the signal output part of described frequency-voltage conversion circuit;
Described figure signal outfan is for being connected with signal source.
8. signal feedback circuit according to claim 7, it is characterised in that described conversion module includes:
Feedback signal precision regulates resistance;
Or, described conversion module includes:
Feedback signal precision regulates resistance and comparator;
Wherein, described signal accuracy regulates resistance and is connected with described frequency-voltage conversion circuit, and described comparator is connected with described signal source.
9. signal feedback circuit according to claim 8, it is characterised in that the signal input part of described frequency-voltage conversion circuit is also associated with toggle switch; The signal input part of described toggle switch is also associated with signal frequency split module.
10. the signal feedback circuit according to claim 7-9 any one, it is characterised in that signal input part or the signal output part of described frequency-voltage conversion circuit are also associated with filter amplification circuit.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610018130.7A CN105680867B (en) | 2016-01-12 | 2016-01-12 | Frequency-voltage conversion circuit, signal judging circuit and signal feedback circuit |
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| CN201610018130.7A CN105680867B (en) | 2016-01-12 | 2016-01-12 | Frequency-voltage conversion circuit, signal judging circuit and signal feedback circuit |
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| CN105680867A true CN105680867A (en) | 2016-06-15 |
| CN105680867B CN105680867B (en) | 2019-03-19 |
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