CN115133939B - Transmitter and communication device - Google Patents
Transmitter and communication device Download PDFInfo
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- CN115133939B CN115133939B CN202110315380.8A CN202110315380A CN115133939B CN 115133939 B CN115133939 B CN 115133939B CN 202110315380 A CN202110315380 A CN 202110315380A CN 115133939 B CN115133939 B CN 115133939B
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- 238000004891 communication Methods 0.000 title claims abstract description 13
- 238000012545 processing Methods 0.000 claims abstract description 33
- 230000010355 oscillation Effects 0.000 claims abstract description 30
- 230000003321 amplification Effects 0.000 claims description 13
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 13
- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims 1
- NCGICGYLBXGBGN-UHFFFAOYSA-N 3-morpholin-4-yl-1-oxa-3-azonia-2-azanidacyclopent-3-en-5-imine;hydrochloride Chemical group Cl.[N-]1OC(=N)C=[N+]1N1CCOCC1 NCGICGYLBXGBGN-UHFFFAOYSA-N 0.000 description 12
- 230000000087 stabilizing effect Effects 0.000 description 12
- 238000010586 diagram Methods 0.000 description 7
- 230000000295 complement effect Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 238000012887 quadratic function Methods 0.000 description 3
- 101100042630 Caenorhabditis elegans sin-3 gene Proteins 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
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- 239000004065 semiconductor Substances 0.000 description 2
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- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/02—Transmitters
- H04B1/04—Circuits
- H04B2001/0408—Circuits with power amplifiers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The application discloses a transmitter and a communication device, wherein the transmitter comprises a signal generating circuit, a compensating circuit, an amplifying circuit and an antenna, wherein the signal generating circuit is connected with a first signal input end and is used for receiving a control voltage signal of the first signal input end and generating a voltage-controlled oscillation signal according to the control voltage signal, and the frequency of the voltage-controlled oscillation signal changes along with the voltage value of the control voltage signal; the compensation circuit is used for processing the received control voltage signal to obtain a compensation signal; the amplifying circuit is connected with the signal generating circuit and the compensating circuit and is used for amplifying the voltage-controlled oscillation signal according to the compensating signal to obtain a signal to be transmitted, wherein the power change of the signal to be transmitted is in a preset range; the antenna is connected with the amplifying circuit and is used for transmitting the signal to be transmitted. Through the mode, the application can improve the transmitting power and widen the working frequency.
Description
Technical Field
The present application relates to the field of communications technologies, and in particular, to a transmitter and a communications device.
Background
Digital mobile radio (DMR, digital Mobile Radio) explosion-proof product with explosion-proof class IIC has a wide range of frequency bands: the device has very high frequency (VHF, very High Frequency) bands (136-174M), U1 bands (400-470M), U2 bands (450-520M), U3 bands (350-400M) and the like, the radio frequency bandwidth is relatively narrow, the research and development process is repeated, and the product maintenance and authentication costs are high; therefore, the wide-band explosion-proof product which covers the 350-527M radio frequency bandwidth of the U1/U2/U3 frequency band is developed, and the method has great significance in reducing cost, enhancing product maintainability and improving product competitiveness. However, most explosion-proof products are narrowband multi-band products at present, the transmitting power is 1W, in practical research and development tests, the voltage stabilizing voltages of the narrowband terminals of the U1/U2/U3 frequency bands are different, if the voltage stabilizing voltages are required to be the same, the transmitting power needs to be reduced to 0.5W, and high-power transmitting cannot be realized.
Disclosure of Invention
The application provides a transmitter and a communication device, which can improve the transmitting power and widen the working frequency.
In order to solve the technical problems, the application adopts the technical scheme that the transmitter comprises a signal generating circuit, a compensating circuit, an amplifying circuit and an antenna, wherein the signal generating circuit is connected with a first signal input end and is used for receiving a control voltage signal of the first signal input end and generating a voltage-controlled oscillation signal according to the control voltage signal, and the frequency of the voltage-controlled oscillation signal changes along with the voltage value of the control voltage signal; the compensation circuit is used for processing the received control voltage signal to obtain a compensation signal; the amplifying circuit is connected with the signal generating circuit and the compensating circuit and is used for amplifying the voltage-controlled oscillation signal according to the compensating signal to obtain a signal to be transmitted, wherein the power change of the signal to be transmitted is in a preset range; the antenna is connected with the amplifying circuit and is used for transmitting the signal to be transmitted.
In order to solve the above technical problem, another technical solution adopted by the present application is to provide a communication device, which includes a transmitter, where the transmitter is the above transmitter.
Through the scheme, the application has the beneficial effects that: the transmitter comprises a signal generating circuit, a compensating circuit, an amplifying circuit and an antenna, wherein a control voltage signal can be respectively input into the signal generating circuit and the compensating circuit through a first signal input end, the signal generating circuit can generate a voltage-controlled oscillation signal after receiving the control voltage signal, and the voltage-controlled oscillation signal is input into the amplifying circuit; the compensation circuit can process the received control voltage signal to generate a compensation signal, and the compensation signal is input to the amplifying circuit; under the combined action of the compensation signal and the voltage-controlled oscillation signal, the power of the signal to be transmitted, which is output by the amplifying circuit, is basically stable, the output power is kept stable under different input frequencies, the independent development of a transmitting device for different frequency bands is not needed, the device is compatible with different frequency bands, the working frequency is wider, and the control of the broadband radio frequency power can be realized; and the transmitting power of the broadband terminal does not need to be reduced, which is beneficial to improving the transmitting power of the signal.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:
fig. 1 is a schematic structural diagram of an embodiment of a transmitter provided by the present application;
fig. 2 is a schematic structural diagram of another embodiment of a transmitter provided by the present application;
fig. 3 is a schematic structural diagram of a further embodiment of a transmitter provided by the present application;
FIG. 4 is a graph of transmit power versus frequency;
fig. 5 is a schematic structural diagram of an embodiment of a communication device provided by the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of a transmitter according to the present application, where the transmitter includes: a signal generating circuit 11, a compensating circuit 12, an amplifying circuit 13, and an antenna 14.
The signal generating circuit 11 is connected to the first signal input terminal Sin1, and is configured to receive a control voltage signal of the first signal input terminal Sin1, and generate a voltage-controlled oscillation signal according to the control voltage signal; specifically, the first signal input terminal Sin1 may be connected to an external device, which is configured to provide a control voltage signal to the signal generating circuit 11 and the compensating circuit 12, where the frequency of the voltage-controlled oscillation signal varies according to a voltage value of the control voltage signal, and the control voltage signal may be a dc signal.
The compensation circuit 12 is used for processing the received control voltage signal to obtain a compensation signal; specifically, the compensation circuit 12 may receive a control voltage signal of the first signal input terminal Sin1, where the control voltage signal is used as an input signal of the compensation circuit 12, and the compensation circuit 12 may operate on the control voltage signal to generate a compensation signal; the specific function of the compensation circuit 12 can be set as desired, e.g., the control voltage signal can be denoted as V i The compensation signal is denoted as V o Assuming that the compensation circuit 12 is a power circuit, the compensation signal is the square of the control voltage signal, i.e. V o ＝V i 2 The method comprises the steps of carrying out a first treatment on the surface of the Assuming that the compensation circuit 12 is a linear amplification circuit, there is V o ＝a*V i +b, a and b are fixed parameters; assuming that the compensation circuit 12 is a division circuit, there is V o ＝V i And c, c is a fixed parameter.
The amplifying circuit 13 is connected with the signal generating circuit 11 and the compensating circuit 12, and is used for amplifying the voltage-controlled oscillation signal according to the compensating signal to obtain a signal to be transmitted; specifically, the amplification factor of the amplifying circuit 13 is affected by the signal generating circuit 11 and the compensating circuit 12, the voltage-controlled oscillation signal output by the signal generating circuit 11 and the compensating signal output by the compensating circuit 12 can act on the amplifying circuit 13 at the same time, the voltage-controlled oscillation signal output by the signal generating circuit 11 is output to the amplifying circuit 13 for normal radio frequency signal amplification, and the compensating circuit 12 collects the frequency information of the signal generating circuit 11, and can output the compensating signal according to the frequency information, so that when the frequency of the voltage-controlled oscillation signal changes, the power change of the signal to be transmitted output by the amplifying circuit 13 is within a preset range, and the preset range can be a range set according to experience.
Further, a curve of the amplitude of the compensation signal varying with the frequency of the voltage-controlled oscillation signal is referred to as a first curve, a curve of the gain of the amplifying circuit 13 varying with the frequency of the voltage-controlled oscillation signal is referred to as a second curve, and the first curve and the second curve are substantially complementary symmetrical, but it is difficult to achieve complete complementary symmetry. Preferably, the preset range is 0, and the power of the signal to be transmitted does not change with the change of the frequency of the voltage-controlled oscillation signal, i.e. the power of the signal to be transmitted remains unchanged.
The antenna 14 is connected with the amplifying circuit 13 and is used for transmitting signals to be transmitted, so that the signals are transmitted; in particular, the antenna 14 may include at least one omni-directional antenna, which may be used to transmit a signal to be transmitted in any direction, a sector antenna, which may be used to transmit a signal to be transmitted to devices within a particular area, or a flat panel antenna, which may be a line-of-sight antenna, which may be used to transmit a signal to be transmitted in a relatively straight manner.
The present embodiment provides a transmitter, which includes a signal generating circuit 11, a compensating circuit 12, an amplifying circuit 13 and an antenna 14, wherein a control voltage signal can be respectively input to the signal generating circuit 11 and the compensating circuit 12, the signal generating circuit 11 can generate a voltage-controlled oscillation signal matched with the control voltage signal after receiving the control voltage signal, and the voltage-controlled oscillation signal is input to the amplifying circuit 13; the compensation circuit 12 may output a compensation signal according to the control voltage signal, and input the compensation signal to the amplifying circuit 13; under the combined action of the compensation signal and the voltage-controlled oscillation signal, the power of the signal to be transmitted, which is output by the amplifying circuit 13, is basically stable, so that the power of the output signal is kept stable under different input frequencies, a transmitting device is not required to be independently developed for different frequency bands, the compatibility is stronger, the working frequency is wider, and the control of the broadband radio frequency power can be realized; and the transmitting power of the broadband terminal is not required to be reduced, and the transmitting power of the signal can be improved.
Referring to fig. 2, fig. 2 is a schematic structural diagram of another embodiment of a transmitter according to the present application, where the transmitter includes: a signal generating circuit 11, a compensating circuit 12, an amplifying circuit 13, and an antenna 14.
The signal generating circuit 11 includes a voltage-controlled oscillator 111, and the voltage-controlled oscillator 111 is connected to the first signal input terminal Sin1 and the amplifying circuit 13, and is configured to receive a control voltage signal of the first signal input terminal Sin1, and generate a corresponding voltage-controlled oscillating signal according to the received control voltage signal, where a frequency of the voltage-controlled oscillating signal changes along with a voltage value of the control voltage signal.
The compensation circuit 12 is used for processing the received control voltage signal to obtain a compensation signal; specifically, the compensation circuit 12 includes an arithmetic circuit 121, a first processing circuit 122, and a second processing circuit 123. It will be appreciated that the specific circuit configuration of the compensation circuit 12 is set to follow the curve of the output power of the amplifying circuit 13 with respect to frequency, so as to compensate the input voltage of the amplifying circuit 13, so that the output power of the amplifying circuit 13 does not change with respect to frequency; for example, assuming that the curve relationship between the output power of the amplifying circuit 13 and the frequency is a quadratic function, the curve relationship between the amplitude of the complementary signal outputted from the compensating circuit 12 and the frequency is also a quadratic function, and the curve shapes of the two are approximately complementary and symmetrical; alternatively, the curve relationship between the output power of the amplifying circuit 13 and the frequency may be a linear function, an exponential function, a logarithmic function, or another curve, and the like, so that the curve between the amplitude and the frequency of the complementary signal output from the compensating circuit 12 may be substantially complementary and symmetrical. The compensation circuit 12 may include circuits implementing addition, subtraction, multiplication, division, difference, calculus, proportional or logarithmic operations, and the like, as well as combinations thereof, to fit a compensation curve.
The first processing circuit 122 is connected to the first signal input terminal Sin1, and is configured to limit the current of the received control voltage signal; specifically, the first processing circuit 122 is further connected to the operation circuit 121, and can output a signal to the operation circuit 121.
The arithmetic circuit 121 includes: the input circuit 1211 and the operational amplifier circuit 1212, the input circuit 1211 is connected to the first signal input terminal Sin1 through the first processing circuit 122, and is used for processing the control voltage signal to obtain an input signal; the operational amplifier circuit 1212 is connected to an input circuit 1211 for amplifying an input signal to obtain an operational amplified signal.
The second processing circuit 123 is connected to the operation circuit 121 and the amplifying circuit 13, and processes the operation amplified signal to obtain a compensation signal, and inputs the compensation signal to the amplifying circuit 13.
The amplifying circuit 13 is connected with the signal generating circuit 11 and the compensating circuit 12, and is used for amplifying the voltage-controlled oscillation signal according to the compensating signal to obtain a signal to be transmitted, wherein the power change of the signal to be transmitted is within a preset range; specifically, the amplifying circuit 13 includes: the control end of the power tube 131 is connected with the second processing circuit 123 and the output end of the voltage-controlled oscillator 111, the output end of the power tube 131 is connected with the antenna 14, and the power tube 131 is used for processing the received compensation signal and the signal output by the voltage-controlled oscillator 111 and outputting a signal to be transmitted with stable power.
The antenna 14 is connected to the amplifying circuit 13 for transmitting the signal to be transmitted.
The following description will take a curve relationship between the output power of the amplifying circuit 13 and the frequency as a quadratic function as an example.
As shown in fig. 3, the first processing circuit 122 includes a fifth resistor R5, and the fifth resistor R5 is connected to the first signal input terminal Sin1 and the arithmetic circuit 121, respectively.
The input circuit 1211 includes: the multiplier K is connected with the first signal input end Sin1 through a fifth resistor R5 and is used for receiving a control voltage signal and processing the control voltage signal; specifically, the multiplier K includes two input terminals and one output terminal, one end of the fifth resistor R5 is connected to the first signal input terminal Sin1, and the other end of the fifth resistor R5 is connected to the two input terminals of the multiplier K; the first resistor R1 is connected to the output end of the multiplier K and the operational amplifier circuit 1212, and is configured to limit the current of the signal output by the multiplier K, and output the signal to the operational amplifier circuit 1212; the second resistor R2 is connected with the first signal input end Sin1 through the fifth resistor R5, and the second resistor R2 is connected with the operational amplifier circuit 1212, and is configured to receive a control voltage signal, limit the control voltage signal, and output the signal to the operational amplifier circuit 1212; the third resistor R3 is connected to the second signal input terminal Sin2 and the operational amplifier circuit 1212, and is configured to receive the first adjustment signal and input the first adjustment signal to the operational amplifier circuit 1212.
The operational amplifier circuit 1212 includes an operational amplifier U and a fourth resistor R4, wherein the non-inverting input terminal of the operational amplifier U is connected to the first resistor R1, the second resistor R2 and the third resistor R3, and the inverting input terminal of the operational amplifier U is connected to the output terminal of the operational amplifier U through the fourth resistor R4; specifically, one end of a first resistor R1 is connected with the output end of the multiplier K, and the other end of the first resistor R1 is connected with the non-inverting input end of the operational amplifier U; one end of the second resistor R2 is connected with the other end of the fifth resistor R5, and the other end of the second resistor R2 is connected with the non-inverting input end of the operational amplifier U; one end of the third resistor R3 is connected to the second signal input terminal Sin2, and the other end of the third resistor R3 is connected to the non-inverting input terminal of the operational amplifier U.
The second processing circuit 123 may receive a second adjustment signal output by the third signal input terminal Sin3, where the second adjustment signal is a power control voltage signal, and may adjust the gate voltage of the power tube 131 through the power control voltage signal, so that the power tube 131 works under different powers; specifically, the second processing circuit 123 is capable of stabilizing the second adjustment signal, and when the voltage value of the second adjustment signal is smaller than the stabilizing value of the second processing circuit 123, the voltage value of the compensation signal follows the positive change of the voltage value of the second adjustment signal, that is, when the voltage value of the second adjustment signal increases, the voltage value of the compensation signal increases; when the voltage value of the second adjustment signal is greater than the voltage value of the second processing circuit 123, the voltage value of the compensation signal is equal to the voltage value of the second processing circuit 123, and the voltage value of the second processing circuit 123 changes inversely with the voltage value of the operational amplification signal, that is, the voltage value decreases with the increase of the voltage value of the operational amplification signal.
Further, the second processing circuit 123 includes: the sixth resistor R6 to the tenth resistor R10 and the voltage stabilizing tube Z, wherein one end of the sixth resistor R6 is connected with the output end of the operation circuit 121, that is, the output end of the operational amplifier U; one end of the seventh resistor R7 is connected with the other end of the sixth resistor R6; one end of the eighth resistor R8 is connected with the other end of the seventh resistor R7, and the other end of the eighth resistor R8 is grounded; one end of the ninth resistor R9 is connected with the other end of the sixth resistor R6; one end of the tenth resistor R10 is connected to the third signal input terminal Sin3, and is configured to receive the second adjustment signal, limit the current of the second adjustment signal, and output the signal to the amplifying circuit 13; the first end of the voltage stabilizing tube Z is connected with the other end of the seventh resistor R7, the second end of the voltage stabilizing tube Z is grounded, and the third end of the voltage stabilizing tube Z is connected with the other end of the ninth resistor R9, the other end of the tenth resistor R10 and the amplifying circuit 13; specifically, when the voltage difference between the first end and the third end of the voltage stabilizing tube Z is greater than a preset value, the first end and the second end of the voltage stabilizing tube Z are conducted; when the voltage difference between the first end and the third end of the voltage stabilizing tube Z is smaller than a preset value, the voltage difference between the first end and the third end of the voltage stabilizing tube Z is kept to be the preset value.
The power tube 131 may be a metal oxide semiconductor field effect tube (MOS, metal Oxide Semiconductor), and the control end of the power tube 131 is a gate of the MOS tube, and the gate is connected to the output end of the voltage-controlled oscillator 111 and the third end of the voltage regulator tube Z for receiving the compensation signal and the signal output by the first power tube 131.
Assuming that the output power curve of a transmitter of a certain model is shown in fig. 4, the abscissa indicates the frequency of the transmitted signal, the ordinate indicates the power/amplitude corresponding to the frequency, curve (1) is the curve of the output power of the power tube changing with the frequency in the existing scheme, and curve (2) is the curve of the amplitude-year-old frequency conversion of the compensation signal (i.e. compensation curve) that needs to be output by the compensation circuit 12; it can be seen from the graph that under different frequencies, the output power of the power tube in the prior art is different, and the transmitting power cannot be controlled at a fixed value; in order to stabilize the output power, in this embodiment, the gate voltage (gate voltage) of the power tube 131 is reversely compensated, so that the output power of the power tube 131 is approximately a fixed value. Specifically, at the frequency point (e.g., frequency point 3 and frequency point 4) with higher output power, the voltage input to the gate of the power tube 131 (denoted as the compensation gate voltage) is smaller; and at the frequency point (such as frequency point 1 and frequency point 7) with lower output power, the compensation grid voltage is larger, and the amplitude of the corresponding compensation grid voltage can be set according to different frequencies and input into the power tube 131, so as to realize adjustment of the output power of the power tube 131 under different frequencies, and finally, the output power of the power tube 131 is approximately a fixed value.
The control voltage signal is input to the compensation circuit 12, and is synthesized by the compensation circuit 12, and outputs a compensation signal to the gate of the power tube 131, and as can be seen from the curve shown in fig. 4, the curve is similar to a parabola, and in order to perform reverse compensation on the gate voltage of the power tube 131, a binary first-order equation can be adopted to perform approximation, and the relationship between the input signal and the output signal of the operation circuit 121 is obtained by fitting, namely:
V o ＝a*V i 2 +b*V i +c
wherein V is o The voltage value of the output signal of the operation circuit 121, V i The voltage values a, b, and c of the input signal of the arithmetic circuit 121 are fixed parameters.
Based on the above equation, the arithmetic circuit 121 may be set as an addition circuit, as shown in fig. 3, and the transmission equation corresponding to this circuit is as follows:
wherein V is r Is the voltage of the second signal input terminal Sin 2.
For example, r1=10Ω, r2=2.7Ω, r3=1Ω, vr=3.7v, and the actual transmission equation can be obtained from the test data as follows:
V o ＝0.0983*V i 2 -0.375*V i +3.667
the data obtained from the test can be shown in the following table:
table test data at different frequencies
| frequency/MHz | 400 | 410 | 420 | 430 | 440 | 450 | 460 | 470 |
| Regulated voltage/V | 3.37 | 3.33 | 3.32 | 3.31 | 3.38 | 3.49 | 3.59 | 3.73 |
| Output power/W | 1.48 | 1.48 | 1.48 | 1.48 | 1.47 | 1.48 | 1.49 | 1.49 |
| Power boost/W | 0.1 | 0.01 | 0 | 0 | 0.03 | 0.13 | 0.23 | 0.37 |
As can be seen from the table above, compared with the existing scheme, the scheme used in this embodiment can increase the transmission power by 0.37W, i.e. 1.25dB.
It can be understood that the number of the power tubes 131 in the amplifying circuit 13 in this embodiment is not limited to one, but may be two or more, and may be set according to the specific application requirement, and the compensation signal may be input to the last power tube 131; such as: assuming that the number of the power tubes 131 is two, respectively denoted as a first power tube 131a and a second power tube 131b, the first power tube 131a is connected to the output end of the voltage-controlled oscillator 111, and the first power tube 131a can amplify the received voltage-controlled oscillation signal; the second power tube 131b is connected to the first power tube 131a and the second processing circuit 123, and the second power tube 131b is configured to amplify the signal output by the first power tube 131a according to the compensation signal, so as to obtain a signal to be transmitted.
The control voltage signal of the voltage-controlled oscillator 111 is introduced as a frequency signal, and the compensation circuit 12 is used for setting the regulated voltage, so that the grid voltage of the power tube 131 is controllable along with the frequency, and the output power of the power tube 131 is controlled within a certain range, so that the working frequency band can be widened, the transmitting power can be improved, the implementation is simple, the cost is low, the performance of the transmitter is not affected, the design of a broadband explosion-proof product is greatly simplified, the occupied area of a printed circuit board (PCB, printed Circuit Board) is small, and the whole size is small.
Fig. 5 is a schematic structural diagram of an embodiment of a communication device according to the present application, where the communication device 100 includes a transmitter 10, and the transmitter 10 is a transmitter in the foregoing embodiment.
The communication device 100 provided in this embodiment may be applied in the fields of communication, explosion protection or intercom equipment, etc. where power control/limitation is required, and may improve the transmission power, and the working bandwidth is wider.
The foregoing is only illustrative of the present application and is not to be construed as limiting the scope of the application, and all equivalent structures or equivalent flow modifications which may be made by the teachings of the present application and the accompanying drawings or which may be directly or indirectly employed in other related art are within the scope of the application.
Claims (9)
1. A transmitter, comprising:
the signal generation circuit is connected with the first signal input end and is used for receiving a control voltage signal of the first signal input end and generating a voltage-controlled oscillation signal according to the control voltage signal, wherein the frequency of the voltage-controlled oscillation signal changes along with the voltage value of the control voltage signal;
the compensation circuit is used for processing the received control voltage signal to obtain a compensation signal, and a curve of the amplitude of the compensation signal along with the frequency change of the voltage-controlled oscillation signal is recorded as a first curve;
the amplifying circuit is connected with the signal generating circuit and the compensating circuit and is used for amplifying the voltage-controlled oscillation signal according to the compensating signal to obtain a signal to be transmitted, wherein a curve of gain of the amplifying circuit changing along with the frequency of the voltage-controlled oscillation signal is recorded as a second curve, the first curve and the second curve are complementarily symmetrical, and when the frequency of the voltage-controlled oscillation signal changes, the power change of the signal to be transmitted output by the amplifying circuit is within a preset range;
and the antenna is connected with the amplifying circuit and used for transmitting the signal to be transmitted.
2. The transmitter of claim 1, wherein,
the compensation circuit includes an arithmetic circuit including:
the input circuit is connected with the first signal input end and is used for processing the control voltage signal to obtain an input signal;
and the operational amplification circuit is connected with the input circuit and is used for amplifying the input signal to obtain an operational amplification signal.
3. The transmitter of claim 2, wherein the input circuit comprises:
the multiplier is connected with the first signal input end and is used for receiving the control voltage signal and processing the control voltage signal;
the first resistor is connected with the output end of the multiplier and the operational amplification circuit and is used for limiting the current of the signal output by the multiplier and outputting the signal to the operational amplification circuit;
the second resistor is connected with the first signal input end and the operational amplification circuit and is used for receiving the control voltage signal, limiting the current of the control voltage signal and outputting a signal to the operational amplification circuit;
and the third resistor is connected with the second signal input end and the operational amplification circuit and is used for receiving the first adjusting signal and inputting the first adjusting signal to the operational amplification circuit.
4. The transmitter of claim 3, wherein,
the operational amplifier circuit comprises an operational power tube and a fourth resistor, wherein the non-inverting input end of the operational power tube is connected with the first resistor, the second resistor and the third resistor, and the inverting input end of the operational power tube is connected to the output end of the operational power tube through the fourth resistor.
5. The transmitter of claim 2, wherein,
the compensation circuit further comprises a first processing circuit, wherein the first processing circuit is connected with the first signal input end and is used for limiting the current of the received control voltage signal.
6. The transmitter of claim 2, wherein,
the compensation circuit further comprises a second processing circuit, and the second processing circuit is connected with the operation circuit and the amplifying circuit and is used for processing the operation amplifying signal to obtain the compensation signal.
7. The transmitter of claim 6, wherein the transmitter further comprises a transmitter unit,
the signal generating circuit comprises a voltage-controlled oscillator, and the voltage-controlled oscillator is connected with the first signal input end and the amplifying circuit and is used for generating a corresponding voltage-controlled oscillation signal based on a control voltage signal.
8. The transmitter of claim 7, wherein the transmitter further comprises a transmitter unit,
the amplifying circuit comprises a power tube, a control end of the power tube is connected with the second processing circuit and an output end of the voltage-controlled oscillator, the output end of the power tube is connected with the antenna, and the power tube is used for processing the received compensation signal and the signal output by the voltage-controlled oscillator and outputting the signal to be transmitted.
9. A communication device comprising a transmitter as claimed in any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110315380.8A CN115133939B (en) | 2021-03-24 | 2021-03-24 | Transmitter and communication device |
Applications Claiming Priority (1)
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