CN217279313U - Signal generating circuit for industrial hybrid control - Google Patents
Signal generating circuit for industrial hybrid control Download PDFInfo
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- CN217279313U CN217279313U CN202220124511.4U CN202220124511U CN217279313U CN 217279313 U CN217279313 U CN 217279313U CN 202220124511 U CN202220124511 U CN 202220124511U CN 217279313 U CN217279313 U CN 217279313U
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Abstract
The application discloses an industrial hybrid control signal generation circuit, which comprises an MCU (microprogrammed control unit) control unit, wherein the MCU control unit outputs two paths of level signals I01 and I02, and the level signal I01 is connected with a first input end of a dual-channel operational amplifier through a first level conversion circuit and a high-low voltage conversion circuit; the level signal I02 is connected with the second input end of the dual-channel operational amplifier through a second level conversion circuit; the first level conversion circuit is used for converting a level signal I01 into a required voltage value, and the second level conversion circuit is used for converting a level signal I02 into the required voltage value; and the output end of the dual-channel operational amplifier outputs a generated signal. The method and the device can be used for outputting the square wave signal with bias and the direct current signal with adjustable amplitude by utilizing the same circuit module; and the circuit has simple structure and low cost, and is suitable for practical use.
Description
Technical Field
The utility model belongs to the technical field of the electron, a signal generation circuit arrangement of industry hybrid control is related to.
Background
Square wave and dc signals are important for their generation and use as signals that can convey and control specific information in the field of industrial control. The signal generating circuit in the field of general industrial control outputs a square wave signal or a direct current signal under the control of an integrated chip and a digital or analog circuit, but the existing signal generating circuit is used for outputting the square wave signal or the direct current signal, the square wave signal and the direct current signal cannot be output in the same circuit module, and the circuit is often required to be switched if the output signal is required to be switched.
Disclosure of Invention
An object of the utility model is to solve the problem among the prior art, provide an industry hybrid control's signal generation circuit arrangement for the realization utilizes same circuit module both can be used to output square wave signal, can be used to output direct current signal again, and the range is adjustable.
The technical scheme adopted by the application is as follows: the signal generation circuit for industrial hybrid control comprises an MCU (microprogrammed control Unit), wherein the MCU outputs two paths of level signals I01 and I02, and the level signal I01 is converted into a required voltage value through a first level conversion circuit and then is connected with a first input end of a dual-channel operational amplifier through a high-low voltage conversion circuit;
the level signal I02 is connected with the second input end of the dual-channel operational amplifier after being converted into a required voltage value through a second level conversion circuit; and the output end of the dual-channel operational amplifier outputs a generated signal.
Preferably, the first level shift circuit and the second level shift circuit are both formed by cascading two NPN triodes.
Preferably, the dual-channel operational amplifier comprises a cascade of a non-inverting amplifier U2A and a voltage follower U2B.
Preferably, the first level shifter circuit includes a transistor Q1 and a transistor Q3: the collector of the triode Q3 is connected with a +5v power supply through a resistor R5, the base of the triode Q3 is connected with the collector of the triode Q1, and the emitter of the triode Q3 is connected with the emitter of the triode Q1 and grounded; the collector of the triode Q1 is connected with a +5v power supply through a resistor R3, and the base of the triode Q1 is connected with a level signal I01 through a resistor R1; the collector of the transistor Q3 serves as the output terminal of the first level shifter circuit.
Preferably, the second level shifter circuit includes a transistor Q2 and a transistor Q4: the collector of the triode Q4 is connected with a +5v power supply through a resistor R6, the base of the triode Q4 is connected with the collector of the triode Q2, and the emitter of the triode Q4 is connected with the emitter of the triode Q2 and grounded; the collector of the triode Q2 is connected with a +5v power supply through a resistor R4, and the base of the triode Q2 is connected with a level signal I02 through a resistor R2; the collector of the transistor Q4 is used as the output terminal of the second level shift circuit.
Preferably, the high-low voltage conversion circuit comprises a resistor R7, a resistor R11, a PNP triode Q5 and an NPN triode Q6; the first end of the resistor R7 and the first end of the resistor R11 are connected with the output end of the first level shift circuit; the base electrode of the triode Q6 is connected with the second end of the resistor R11, and the emitter electrode of the triode Q6 is grounded; the base electrode of the triode Q5 is connected with the second end of the resistor R7, the emitting electrode of the triode Q5 is connected with a +5v power supply, and the collecting electrode of the triode Q5 is connected with the collecting electrode of the triode Q6 and is connected with the non-inverting input end of the non-inverting amplifier U2A through the variable resistor R12.
Preferably, a non-inverting input terminal of the voltage follower U2B is connected to an output terminal of the second level shift circuit, and an output terminal of the voltage follower U2B is connected to a non-inverting input terminal of the non-inverting amplifier U2A.
Preferably, an output end of the non-inverting amplifier U2A outputs a generated signal, and is connected to the signal output end through a first follower.
The beneficial effect of this application: the application can realize that (1) the same circuit module can be used for outputting square wave signals and direct current signals; (2) the amplitude of the output direct current signal is adjustable; (3) a square wave signal with bias can be obtained; (4) the loading capacity of the circuit is improved through the first follower; (5) the circuit has simple structure and low cost, and is suitable for practical use.
Drawings
FIG. 1 is a circuit block diagram of a signal generating circuit for industrial hybrid control;
fig. 2 is a specific circuit implementation of fig. 1.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.
A signal generating circuit for industrial hybrid control, as shown in FIG. 1, includes an MCU control unit 100, a first level shift circuit 210, a high-low voltage shift circuit 220, a second level shift circuit 300, a dual-channel operational amplifier 400 and a first follower 500. The first follower 500 is used to improve the load capability of the circuit.
The MCU control unit is used for generating two-way level signals I01 and I02. The level signal output by the MCU control unit may be 3.3V or 5V, the required square wave or direct current voltage may not be consistent with the level signal output by the MCU control unit, and at this time, a level conversion circuit is required to be added for performing level matching between digital circuits of different working power supplies.
The level signal I01 passes through a first level conversion circuit and a high-low voltage conversion circuit and is connected with a first input end of the dual-channel operational amplifier; the level signal I02 is connected with the second input end of the dual-channel operational amplifier through a second level conversion circuit; the first level conversion circuit is used for converting the level signal I01 into a required voltage value, and the second level conversion circuit is used for converting the level signal I02 into the required voltage value; the output end of the dual-channel operational amplifier is connected with the signal output end J1 through a first follower U3.
In the embodiment, the dual-channel operational amplifier comprises a non-inverting amplifier U2A and a voltage follower U2B which are cascaded, and U2A and U2B are packaged and integrated in one operational amplifier by SOP 8. The voltage follower U2B has low cost due to the adoption of a dual-channel operational amplifier, and the area of a bare chip is usually less than twice that of a single-channel operational amplifier through a merging sub-circuit.
Specifically, as shown in fig. 2, the first level shift circuit and the second level shift circuit are both formed by cascading two NPN triodes. The first level shift circuit includes a transistor Q1 and a transistor Q3: the collector of the triode Q3 is connected with a +5v power supply through a resistor R5, the base of the triode Q3 is connected with the collector of the triode Q1, and the emitter of the triode Q3 is connected with the emitter of the triode Q1 and grounded; the collector of the triode Q1 is connected with a +5v power supply through a resistor R3, and the base of the triode Q1 is connected with a level signal I02 through a resistor R1; the collector of the transistor Q3 serves as the output terminal of the first level shifter circuit.
The high-low voltage conversion circuit comprises a resistor R7, a resistor R12, a PNP triode Q5 and an NPN triode Q6; the first end of the resistor R7 and the first end of the resistor R11 are connected with the output end of the first level shift circuit; the base electrode of the triode Q6 is connected with the second end of the resistor R11, and the emitter electrode of the triode Q6 is grounded; the base of the triode Q5 is connected with the second end of the resistor R7, the emitter of the triode Q5 is connected with the +5v power supply, the collector of the triode Q5 is connected with the collector of the triode Q6, and the triode Q5 is connected with the non-inverting input end (namely the first input end of the dual-channel operational amplifier) of the non-inverting amplifier U2A through the variable resistor R12.
The second level shift circuit includes a transistor Q2 and a transistor Q4: the collector of the triode Q4 is connected with a +5v power supply through a resistor R6, the base of the triode Q4 is connected with the collector of the triode Q2, and the emitter of the triode Q4 is connected with the emitter of the triode Q2 and grounded; the collector of the triode Q2 is connected with a +5v power supply through a resistor R4, and the base of the triode Q2 is connected with a level signal I02 through a resistor R2; the collector of the triode Q4 is connected to the non-inverting input terminal (i.e. the second input terminal of the dual-channel operational amplifier) of the voltage follower U2B as the output terminal of the second level shift circuit, and the output terminal of the voltage follower U2B is connected to the non-inverting input terminal of the non-inverting amplifier U2A through the resistor R8.
The implementation process of the embodiment:
when I01 is at low level and I02 is at high level, a wide-range high-level signal is output;
when I01 and I02 are high level at the same time, outputting a high level signal with a small range;
when I01 is high level and I02 is low level, a low level signal is output;
when I01 and I02 are staggered, the output waveform can be a square wave to the ground or a square wave with bias voltage.
The specific description is as follows:
1. when I01 is a low level signal, the base of Q3 is a high level signal, the collector of Q3 is a low level signal, the collector of Q5 is a high level signal, and the high level signal is connected to the non-inverting input terminal of the operational amplifier U2A after being divided by the variable resistor R12 and the resistor R8; when I02 is a high signal, the base of Q4 is a low signal, the collector of Q4 is a high signal, the output terminal of U2B is a high signal, and a high signal is input to the non-inverting input terminal of U2A.
When I01 is at low level and I02 is at high level, two high level signals are input to the non-inverting input terminal of U2A, and a large range voltage is obtained after amplification.
2. When I01 is a high level signal, the Q3 base is a low level signal, the Q3 collector is a high level signal, the Q5 collector is a low level signal, and the low level signal is connected to the non-inverting input terminal of the operational amplifier U2A after being divided by the variable resistor R12 and the resistor R8; when I02 is a high signal, the base of Q4 is a low signal, the collector of Q4 is a high signal, the output terminal of U2B is a high signal, and a high signal is input to the non-inverting input terminal of U2A.
When I01 and I02 are both at high level, the non-inverting input terminal of U2A inputs a high level and a low level, and a small-scale voltage is obtained after amplification.
3. When I01 is a high level signal, the Q3 base is a low level signal, the Q3 collector is a high level signal, the Q5 collector is a low level signal, and the low level signal is connected to the non-inverting input terminal of the operational amplifier U2A after being divided by the variable resistor R12 and the resistor R8; when I02 is a low level signal, the base of Q4 is a high level signal, the collector of Q4 is a low level signal, the output end of U2B is a low level signal, and a low level signal is input to the non-inverting input end of U2A.
That is, when I01 is at high level and I02 is at low level, two low level signals are input to the non-inverting input terminal of U2A, and a low voltage (0V or close to 0V) is obtained after amplification.
4. By switching the high and low levels of I01 and I02 in 1, 2 and 3, the corresponding square waves can be obtained, the frequency of the square waves is faster as the switching frequency is faster, and the low level signals of the square waves can be selected to be 2 or 3, namely the square wave signals with bias and without bias voltage can be obtained.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (8)
1. The signal generating circuit for industrial hybrid control is characterized by comprising an MCU control unit,
the MCU control unit outputs two paths of level signals I01 and I02,
the level signal I01 is connected with the first input end of the dual-channel operational amplifier through the high-low voltage conversion circuit after the level signal I01 is converted into a required voltage value through the first level conversion circuit;
the level signal I02 is connected with the second input end of the dual-channel operational amplifier after being converted into a required voltage value through a second level conversion circuit;
and the output end of the dual-channel operational amplifier outputs a generated signal.
2. The industrial hybrid control signal generating circuit as claimed in claim 1, wherein the first level shifter circuit and the second level shifter circuit are each formed by two NPN triodes in cascade connection.
3. The industrial hybrid control signal generating circuit as claimed in claim 2, wherein the dual-channel operational amplifier comprises a cascade of a non-inverting amplifier U2A and a voltage follower U2B.
4. The industrial hybrid control signal generating circuit of claim 3, wherein the first level shifter circuit comprises a transistor Q1 and a transistor Q3: the collector of the triode Q3 is connected with a +5v power supply through a resistor R5, the base of the triode Q3 is connected with the collector of the triode Q1, and the emitter of the triode Q3 is connected with the emitter of the triode Q1 and grounded; the collector of the triode Q1 is connected with a +5v power supply through a resistor R3, and the base of the triode Q1 is connected with a level signal I02 through a resistor R1; the collector of the transistor Q3 serves as the output terminal of the first level shifter circuit.
5. The industrial hybrid control signal generating circuit of claim 3, wherein the second level shifter circuit comprises a transistor Q2 and a transistor Q4: the collector of the triode Q4 is connected with a +5v power supply through a resistor R6, the base of the triode Q4 is connected with the collector of the triode Q2, and the emitter of the triode Q4 is connected with the emitter of the triode Q2 and grounded; the collector of the triode Q2 is connected with a +5v power supply through a resistor R4, and the base of the triode Q2 is connected with a level signal I01 through a resistor R2; the collector of the transistor Q4 is used as the output terminal of the second level shift circuit.
6. The industrial hybrid control signal generating circuit as claimed in claim 2 or 4, wherein the high-low voltage converting circuit comprises a resistor R7, a resistor R11, a PNP transistor Q5 and an NPN transistor Q6;
the first end of the resistor R7 and the first end of the resistor R11 are connected with the output end of the first level shift circuit;
the base electrode of the triode Q6 is connected with the second end of the resistor R11, and the emitting electrode of the triode Q6 is grounded;
the base electrode of the triode Q5 is connected with the second end of the resistor R7, the emitting electrode of the triode Q5 is connected with a +5v power supply, and the collecting electrode of the triode Q5 is connected with the collecting electrode of the triode Q6 and is connected with the non-inverting input end of the non-inverting amplifier U2A through the variable resistor R12.
7. The industrial hybrid control signal generating circuit as claimed in claim 3, wherein the non-inverting input terminal of the voltage follower U2B is connected to the output terminal of the second level shifter, and the output terminal of the voltage follower U2B is connected to the non-inverting input terminal of the non-inverting amplifier U2A.
8. The industrial hybrid control signal generating circuit as claimed in claim 7, wherein the output terminal of the non-inverting amplifier U2A outputs a generating signal, and is connected to the signal output terminal through the first follower.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220124511.4U CN217279313U (en) | 2022-01-18 | 2022-01-18 | Signal generating circuit for industrial hybrid control |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220124511.4U CN217279313U (en) | 2022-01-18 | 2022-01-18 | Signal generating circuit for industrial hybrid control |
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| CN217279313U true CN217279313U (en) | 2022-08-23 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114326542A (en) * | 2022-01-18 | 2022-04-12 | 杭州晶华微电子股份有限公司 | Signal generating circuit for industrial hybrid control |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114326542A (en) * | 2022-01-18 | 2022-04-12 | 杭州晶华微电子股份有限公司 | Signal generating circuit for industrial hybrid control |
| CN114326542B (en) * | 2022-01-18 | 2023-12-05 | 杭州晶华微电子股份有限公司 | Industrial mixed control signal generation circuit |
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