CN112583425A - Detection regulating circuit and transmitter - Google Patents
Detection regulating circuit and transmitter Download PDFInfo
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- CN112583425A CN112583425A CN201910944981.8A CN201910944981A CN112583425A CN 112583425 A CN112583425 A CN 112583425A CN 201910944981 A CN201910944981 A CN 201910944981A CN 112583425 A CN112583425 A CN 112583425A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- 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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Abstract
The invention discloses a detection regulating circuit and a transmitter, wherein the detection regulating circuit comprises a driving circuit, a detection circuit and a control circuit, wherein the driving circuit is used for receiving a first signal and processing the first signal to generate a second signal; the detection circuit is connected with the drive circuit and used for detecting whether the parameter of the second signal meets a preset parameter condition or not and outputting a detection result; the control circuit is respectively connected with the driving circuit and the detection circuit and used for generating a control signal to control the driving circuit according to the detection result so that the parameter of the second signal output by the driving circuit meets the preset parameter condition. Through the mode, the electromagnetic coupling effect can be reduced.
Description
Technical Field
The invention relates to the technical field of integrated circuits, in particular to a detection regulating circuit and a transmitter.
Background
With the continuous development of integrated circuits, the influence of a Power Amplifier (PA) on the function and performance of a Local Oscillator (LO) is more and more obvious; when the transmission power of the power amplifier is large, it causes electromagnetic coupling to the local oscillator output by the long metal trace through BALUN (BALUN), directly deteriorating the spectrum purity of the local oscillator.
The inventor of the invention finds that in long-term research and development, the influence of a power amplifier on a local oscillator is generally reduced by enhancing the driving capability of a driving circuit in the prior art, but because the environment on a chip is complex, the method is difficult to accurately evaluate the influence of electromagnetic coupling caused by the power amplifier, overlarge current needs to be consumed to reserve margin, and when the power amplifier is switched to a lower power mode, the driving capability of the driving circuit is not changed along with the change of the driving capability, the overlarge current consumption is more obvious, closed-loop regulation is not realized, the performance and the function of the local oscillator are difficult to ensure by utilizing the open-loop regulation, and overlarge power consumption is consumed; or the driving capability of the driving circuit is indirectly adjusted by adjusting the power strength of the power amplifier, and the actual influence of the power amplifier on the local oscillator cannot be detected in this way, so that the accuracy and the reliability are low.
Disclosure of Invention
The invention mainly solves the problem of providing a detection regulating circuit and a transmitter, which can reduce the influence of electromagnetic coupling.
In order to solve the above technical problem, the technical solution adopted by the present invention is to provide a detection and adjustment circuit, including: the driving circuit is used for receiving the first signal, processing the first signal and generating a second signal; the detection circuit is connected with the drive circuit and used for detecting whether the parameter of the second signal meets a preset parameter condition or not and outputting a detection result; the control circuit is respectively connected with the driving circuit and the detection circuit and used for generating a control signal to control the driving circuit according to the detection result so that the parameter of the second signal output by the driving circuit meets the preset parameter condition.
In order to solve the above technical problem, another technical solution adopted by the present invention is to provide a transmitter, including: detection regulating circuit, mixer and power amplifier, detection regulating circuit includes: the driving circuit is used for receiving the first signal, processing the first signal and generating a second signal; the detection circuit is connected with the drive circuit and used for detecting whether the parameter of the second signal meets a preset parameter condition or not and outputting a detection result; the control circuit is respectively connected with the drive circuit and the detection circuit and is used for generating a control signal to control the drive circuit according to the detection result so that the parameter of the second signal output by the drive circuit meets the preset parameter condition; the frequency mixer is connected with the detection regulating circuit and used for receiving the baseband signal and the signal output by the detection regulating circuit and carrying out frequency mixing processing to obtain a radio frequency signal; the power amplifier is connected with the mixer and used for receiving the radio frequency signal and amplifying the radio frequency signal.
In order to solve the above technical problem, another technical solution adopted by the present invention is to provide a transmitter, including: the detection and adjustment circuit comprises a first driving circuit, a second driving circuit, a first detection circuit and a first control circuit, wherein the first driving circuit and the second driving circuit are connected through a first metal wire, the output end of the first driving circuit is connected with the first detection circuit, the first driving circuit is used for receiving and processing a first signal to obtain a second signal, and the second driving circuit is used for receiving a fourth signal; the fourth signal is a signal obtained by the first driving circuit transmitting the second signal to the second driving circuit by using the first metal wire, and the length of the first metal wire is greater than the first preset length; the first detection circuit is connected with the first driving circuit and used for detecting whether the parameter of the second signal meets a preset parameter condition or not and outputting a detection result; the first control circuit is connected with the first driving circuit and used for generating a control signal to control the first driving circuit according to the detection result so that the parameter of the second signal meets the preset parameter condition; the frequency mixer is connected with the second driving circuit through a second metal wire and used for receiving the baseband signal and the signal output by the second driving circuit and carrying out frequency mixing processing to obtain a radio frequency signal; the power amplifier is connected with the mixer and used for receiving the radio frequency signal and amplifying the radio frequency signal.
Through the scheme, the invention has the beneficial effects that: receiving a first signal by using a driving circuit, and processing the first signal to generate a second signal; the detection circuit is used for detecting whether the parameter of the second signal meets a preset parameter condition or not and outputting a detection result to the control circuit; the control circuit can generate a control signal according to a detection result, so that the driving capability of the driving circuit is adjusted, the driving circuit, the detection circuit and the control circuit form a closed loop circuit, the driving capability of the driving circuit is dynamically adjusted by detecting the influence degree of the power amplifier on the performance of the local oscillator, the parameter of the second signal output by the driving circuit meets the preset parameter condition, the function and the performance of the local oscillator are ensured, and the influence of electromagnetic coupling caused by the power amplifier is reduced.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts. Wherein:
FIG. 1 is a schematic diagram of a detection and adjustment circuit according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of another embodiment of a detection and adjustment circuit provided in the present invention;
FIG. 3 is a schematic diagram of a driving circuit in another embodiment of the detection and adjustment circuit provided in the present invention;
FIG. 4 is a schematic diagram of another structure of a driving circuit in another embodiment of the detection and adjustment circuit provided in the present invention;
FIG. 5 is a schematic diagram of a detection and conditioning circuit according to another embodiment of the present invention;
fig. 6 is a schematic structural diagram of an embodiment of a transmitter provided in the present invention;
fig. 7 is a schematic structural diagram of another embodiment of a transmitter provided by the present invention;
fig. 8 is a schematic structural diagram of a further embodiment of a transmitter provided by the present invention;
fig. 9 is a schematic structural diagram of a further embodiment of the transmitter provided by the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of a detection and adjustment circuit provided in the present invention, the detection and adjustment circuit includes: a drive circuit 11, a detection circuit 12, and a control circuit 13.
The driving circuit 11 is configured to receive the first signal, process the first signal, and generate a second signal.
In a specific embodiment, the first signal may be a local oscillation signal generated by a local oscillator, which may be a high power rf signal; the driving circuit 11 can drive the received first signal, the driving circuit 11 can be a buffer, which can increase the driving capability of the first signal, so that the output second signal has a rising edge and a falling edge meeting the requirement, and the buffer can be composed of several stages of inverters with gradually increased device sizes or circuits with similar structures, so that the required driving capability is obtained, and the optimal power consumption and delay are achieved.
The detection circuit 12 is connected to the driving circuit 11, and is configured to detect whether a parameter of the second signal satisfies a preset parameter condition, and output a detection result.
The detection circuit 12 detects a parameter of the second signal output by the driving circuit 11, and determines the magnitude of the influence of electromagnetic coupling generated when the output of the power amplifier changes on the second signal; when the parameter of the second signal does not satisfy the preset parameter condition, it can be determined that the influence of the electromagnetic coupling on the second signal is relatively large, and when the parameter of the second signal output by the driving circuit 11 satisfies the preset parameter condition, it can be determined that the influence of the electromagnetic coupling on the second signal is within the allowable range, and a corresponding detection result is output to the control circuit 13.
The control circuit 13 is connected to the driving circuit 11 and the detection circuit 12, respectively, and is configured to generate a control signal to control the driving circuit 11 according to the detection result, so that a parameter of the second signal output by the driving circuit 13 satisfies a preset parameter condition.
The control circuit 13 may generate a control signal after receiving the detection result output by the detection circuit 12, so that the driving circuit 11 regulates and controls the driving capability thereof, thereby implementing dynamic adjustment of the driving capability; when the detection circuit 12 detects that the parameter of the second signal does not satisfy the preset parameter condition, the control circuit 13 outputs a control signal for increasing the driving capability of the driving circuit 11, so that the swing of the second signal is increased or the time of rising edge/falling edge is shortened; when the detection circuit 12 detects that the parameter of the second signal output by the driving circuit 11 satisfies the preset parameter condition, the control circuit 13 outputs a control signal that does not adjust the driving capability of the driving circuit 11 or does not generate a control signal.
The driving circuit 11, the detection circuit 12 and the control circuit 13 form a closed loop circuit, the detection circuit 12 can detect whether the parameter of the second signal output by the driving circuit 11 meets the requirement, generate a detection result and send the detection result to the control circuit 13, so that the control circuit 13 can generate a control signal for controlling the driving circuit 11 to adjust the driving capability according to the detection result, after the driving circuit 11 adjusts the driving capability, a new second signal is generated, the detection circuit 12 is used again for detection, and the previous operation is repeated until the output of the driving circuit 11 meets the requirement.
The power amplifier generates electromagnetic coupling to the metal wires, the metal wires are difficult to be shortened due to actual layout and use requirements, and the distance between the power amplifier and a local oscillator cannot be far enough due to limited chip area; by using the scheme in this example, the influence of electromagnetic coupling can be effectively reduced, and the driving capability of the driving circuit 11 is adjusted in real time according to the parameter of the second signal, so that the parameter of the second signal output by the driving circuit 11 meets the preset parameter condition.
In other embodiments, the first signal may also be other types of signals, and is not limited to a local oscillation signal, such as a radio frequency signal to be received, and the detection adjusting circuit provided in this embodiment may be applied to a circuit structure that generates electromagnetic coupling between devices.
The embodiment provides a detection regulating circuit, which receives a first signal by using a driving circuit 11, processes the first signal and generates a second signal; the detection circuit 12 is configured to detect whether a parameter of the second signal satisfies a preset parameter condition, and output a detection result to the control circuit 13; the control circuit 13 can generate a control signal according to the detection result, so as to adjust the driving capability of the driving circuit 11, and dynamically adjust the driving capability of the driving circuit 11 by detecting the influence degree of the power amplifier on the local oscillation performance, so that the parameter of the second signal output by the driving circuit 11 meets the preset parameter condition, the function and performance of the local oscillation are ensured, and the influence of electromagnetic coupling caused by the power amplifier is reduced.
Referring to fig. 2, fig. 2 is a schematic structural diagram of another embodiment of the detection adjusting circuit provided in the present invention, the detection adjusting circuit includes: a drive circuit 11, a detection circuit 12, and a control circuit 13.
The driving circuit 11 is configured to receive a first signal, process the first signal, and generate a second signal; the driving capability of the driving circuit 11 may be a default value right from the beginning.
The detection circuit 12 includes: a first detection judgment circuit 121, a second detection judgment circuit 122, and a selection circuit 123.
The first detection and judgment circuit 121 is connected to the output end of the driving circuit 11 through a metal trace, and is configured to detect whether the phase noise of the second signal is within a preset phase noise range.
The second detection and judgment circuit 122 is connected to the output end of the driving circuit 11 through a metal trace, and is configured to detect whether the amplitude of the second signal is within a preset amplitude range.
The selection circuit 123 is connected to the first detection judgment circuit 121 and the second detection judgment circuit 122, and is configured to output a detection result output by at least one of the first detection judgment circuit 121 and the second detection judgment circuit 122 to the control circuit 13.
The detection of the amplitude and the phase noise is output to the control circuit 13 by the selection circuit 123 after being judged, and one of the amplitude detection and the phase noise detection can be adopted according to the system requirements, or the amplitude detection and then the phase noise detection can be carried out; the method can be selected according to actual requirements, amplitude detection can be selected when low precision is required, phase noise detection can be selected when high precision is required, and amplitude detection and then phase noise detection can be carried out when the power change range is large.
In order to avoid that the second signal is simultaneously input to the first detection judging circuit 121 and the second detection judging circuit 122 when only one of the amplitude detection and the phase noise detection is used, a switch circuit (not shown in the figure) may be arranged between the metal wire and the first detection judging circuit 121 and the second detection judging circuit 122, so that when only the phase noise detection is used, the switch circuit inputs the second local oscillation signal only to the first detection judging circuit 121, and the second detection judging circuit 122 may be in an idle state; when only amplitude detection is used, the switching circuit inputs the second local oscillation signal only to the second detection judging circuit 122, and the first detection judging circuit 121 can be in an idle state, so that power consumption is reduced.
In a specific embodiment, the parameter of the second signal is phase noise, the detection circuit 12 outputs a detection result that the degree of interference on the second signal is greater than the predetermined influence degree when detecting that the phase noise of the second signal is greater than the predetermined phase noise, and the control circuit 13 generates the control signal after receiving the detection result sent by the detection circuit 12, so that the driving capability of the driving circuit 11 is improved.
Further, the first detection judgment circuit 121 includes: a frequency divider 1211, a time-to-digital converter 1212, and a first comparison and determination circuit 1213.
The frequency divider 1211 is connected to the output end of the driving circuit 11 through a metal trace, and is configured to perform frequency division processing on the second signal to obtain a third signal, where a frequency of the third signal is smaller than a frequency of the second signal.
The time-to-digital converter 1212 is connected to the frequency divider 1211, and is configured to receive the reference clock signal and the third signal, obtain a phase difference signal between the reference clock signal and the third signal, and convert the phase difference signal into a phase difference digital signal.
The first comparing and determining circuit 1213 is connected to the time-to-digital converter 1212, and is configured to determine whether the phase difference digital signal is smaller than a preset phase difference digital signal, and output a detection result; if the phase difference digital signal between the reference clock signal and the third signal is greater than the preset phase difference digital signal, the detection result comprises information that the phase difference digital signal between the reference clock signal and the third signal is greater than the preset phase difference digital signal; if the phase difference digital signal between the reference clock signal and the third signal is smaller than the preset phase difference digital signal, the detection result includes information that the phase difference digital signal between the reference clock signal and the third signal is smaller than the preset phase difference digital signal.
In another specific embodiment, the parameter of the second signal is amplitude, the detection circuit 12 outputs a detection result that the degree of interference on the second signal is smaller than a preset influence degree when detecting that the amplitude of the second signal is smaller than a preset amplitude, and the control circuit 13 generates the control signal after receiving the detection result sent by the detection circuit 12, so that the driving capability of the driving circuit 11 is improved.
Further, the second detection judging circuit 122 includes: an amplitude detection circuit 1221 and a second comparison and judgment circuit 1222.
The amplitude detection circuit 1221 is configured to detect an amplitude of the second signal; the second comparing and determining circuit 1222 is connected to the amplitude detecting circuit 1221, and is configured to determine whether the amplitude of the second signal is smaller than a preset amplitude, and output a detection result; if the amplitude of the second signal is smaller than the preset amplitude, the detection result contains information that the amplitude of the second signal is smaller than the preset amplitude; if the amplitude of the second signal is greater than the preset amplitude, the detection result includes information that the amplitude of the second signal is greater than the preset amplitude.
When the power amplifier has a large influence on the local oscillator output, the second comparing and determining circuit 1222 may determine whether the amplitude of the second signal deviates from the preset amplitude, and if the amplitude of the second signal is smaller than the preset amplitude, the driving capability of the driving circuit 11 may be enhanced, so that the amplitude of the second signal generated by the driving circuit is increased; if the amplitude of the second signal is greater than the predetermined amplitude, the driving capability of the driving circuit 11 is reduced, so that the amplitude of the second signal generated by the driving circuit is reduced to reduce power consumption.
In other embodiments, the parameters of the second signal include amplitude and phase noise, the detection circuit 12 outputs a detection result that the degree of interference on the second signal is greater than the preset influence degree when detecting that the amplitude of the second signal is smaller than the preset amplitude and the phase noise of the second signal is greater than the preset phase noise, and the control circuit 13 generates the control signal after receiving the detection result sent by the detection circuit 12, so that the driving circuit 11 improves the driving capability.
The control circuit 13 is connected to the detection circuit 12, and is configured to generate a control signal to control the driving circuit 11 according to the detection result, so that the parameter of the second signal output by the driving circuit satisfies a preset parameter condition.
The driving circuit 11 may be a buffer, and the control circuit 13 generates a control signal according to the detection result of the detection circuit 12, so that the buffer adjusts the driving capability; as shown in fig. 3, whether the inverter is connected with the tail current sources I1 to I3 is controlled by controlling whether the switches K1 to K3 are closed, so as to adjust the driving capability; or as shown in fig. 4, the control switch K4-K6 is closed or not to control the buffer to be composed of several inverters, and the size of the buffer is controlled, so that the adjustment of the driving capability is realized.
In a specific embodiment, as shown in fig. 5, the driving circuit 11 may include a first driving circuit 111 and a second driving circuit 112, the first driving circuit 111 and the second driving circuit 112 are connected by a metal trace, the first driving circuit 111 is configured to receive and process a first signal to obtain a second signal, and the second driving circuit 112 is configured to receive a fourth signal, where the fourth signal is a signal obtained by the first driving circuit 111 transmitting the second signal to the second driving circuit 112 by using the metal trace.
The control circuit 13 includes a first control circuit 131 and a second control circuit 132, the first drive circuit 111 is connected to the first control circuit 131 and the detection circuit 12, respectively, and the second drive circuit 112 is connected to the second control circuit 132 and the detection circuit 12, respectively.
The second signal output by the first driving circuit 111 reaches the transmitting end through the metal wiring, and because the second signal may be affected by interference in the transmission process using the metal wiring, the second signal is changed into a fourth signal after being transmitted by the metal wiring, the fourth signal and the baseband signal to be transmitted are subjected to up-mixing to form a radio frequency signal, and then the radio frequency signal is amplified by the power amplifier and then transmitted through the antenna.
Since the second driving circuit 112 not only affects the quality of the signal outputted to the mixer (not shown), but also is the load of the first driving circuit 111, the first and second driving circuits 111 and 112 can be controlled by the first and second control circuits 131 and 132, respectively, so as to adjust the driving capability, and the driving capabilities of the first and second driving circuits 111 and 112 can be adjusted independently without interfering with each other.
The driving capability of the driving circuit 11 is accurately controlled by directly detecting the influence of the power amplifier on the output performance of the local oscillator; when the transmitting power of the power amplifier is larger, the driving capability of the driving circuit 11 is correspondingly enhanced through the closed loop until the influence of the power amplifier on the local oscillation performance is reduced to be lower than the preset influence degree, so that the influence of electromagnetic coupling can be reduced; when the transmission power of the power amplifier is small, the driving capability of the driving circuit 11 is reduced to reduce power consumption.
Referring to fig. 6, fig. 6 is a schematic structural diagram of an embodiment of a transmitter provided in the present invention, where the transmitter includes: detection and adjustment circuit 10, power amplifier 20, and mixer 30.
The detection adjusting circuit 10 comprises a driving circuit 11, a detection circuit 12 and a control circuit 13, wherein the driving circuit 11 is used for receiving a first signal, processing the first signal and generating a second signal; the detection circuit 12 is connected to the driving circuit 11, and is configured to detect whether a parameter of the second signal satisfies a preset parameter condition, and output a detection result; the control circuit 13 is respectively connected to the driving circuit 11 and the detection circuit 12, and is configured to generate a control signal to control the driving circuit 11 according to the detection result, so that a parameter of the second signal output by the driving circuit meets a preset parameter condition; the specific circuit structure and function are the same as those in the above embodiments, and are not described herein again.
The frequency mixer 30 is connected to the detection and adjustment circuit 10 through metal wiring, and is configured to receive a baseband signal and a signal output by the detection and adjustment circuit 10, and perform frequency mixing processing to obtain a radio frequency signal; specifically, the mixer 30 is connected to the driving circuit 11 and the detection circuit 12 through metal wiring.
The power amplifier 20 is connected to the mixer 30, and is configured to receive the radio frequency signal and amplify the radio frequency signal.
The first signal and the second signal are local oscillation signals which are respectively recorded as a first local oscillation signal and a second local oscillation signal; initially, the driving capability of the driving circuit 11 and the power of the power amplifier 20 are both default values, when the power of the power amplifier 20 is larger, the influence of electromagnetic coupling on the second signal is increased, the detection circuit 12 detects the parameter deterioration of the second local oscillation signal, the driving circuit 11 increases the driving capability of the first local oscillation signal, and reduces the influence of the power amplifier 20 until the parameter of the output second local oscillation signal reaches a preset parameter condition; when the power of the power amplifier 20 is small, the influence of the electromagnetic coupling on the local oscillator is reduced, and the detection circuit 12 detects that the local oscillator has better performance, so that the driving capability of the driving circuit 11 can be reduced, and the reduction of power consumption is realized.
In a specific embodiment, the detection and adjustment circuit 10 is further configured to detect whether the parameter of the second local oscillation signal satisfies the preset parameter condition when the power of the power amplifier 20 is increased or decreased.
In another specific embodiment, when the temperature of the transmitter is not within the preset temperature range, it is detected whether the parameter of the second local oscillation signal satisfies a preset parameter condition.
In other specific embodiments, it is detected whether the parameter of the second local oscillation signal satisfies the predetermined parameter condition at intervals of a predetermined time, so as to reduce the interference of the power amplifier 20 on the second local oscillation signal.
The power of the power amplifier 20 can be increased/decreased according to actual requirements, the current temperature exceeds/is lower than the preset temperature or the detection is carried out at intervals of preset time, the influence of the power amplifier 20 on the performance of the local oscillator is reduced, the performance of the transmitter is improved, and the power consumption of the transmitter can be reduced.
Referring to fig. 7, fig. 7 is a schematic structural diagram of another embodiment of a transmitter provided in the present invention, where the transmitter includes: a detection and adjustment circuit (not shown), a power amplifier 20, and a mixer 30.
The detection adjustment circuit includes a first drive circuit 111, a second drive circuit 112, a first detection circuit 12, and a first control circuit 131.
The first driving circuit 111 and the second driving circuit 112 are connected through a first metal wire, an output end of the first driving circuit 111 is connected with the first detection circuit 12, the first driving circuit 111 is used for receiving a first signal and processing the first signal to obtain a second signal, and the second driving circuit 112 is used for receiving a fourth signal; the fourth signal is a signal obtained by the first driving circuit 111 transmitting the second signal to the second driving circuit 112 by using the first metal wire, and the length of the first metal wire is greater than the first preset length.
The first detection circuit 12 is connected to the first driving circuit 111, and is configured to detect whether a parameter of the second signal satisfies a preset parameter condition, and output a detection result; the first control circuit 131 is connected to the first driving circuit 111, and is configured to generate a control signal to control the first driving circuit 111 according to the detection result, so that the parameter of the second signal satisfies a preset parameter condition.
The frequency mixer 30 is connected to the second driving circuit 112 through a second metal wire, and is configured to receive a baseband signal and a signal output by the second driving circuit 112, and perform frequency mixing processing to obtain a radio frequency signal; the power amplifier 20 is connected to the mixer 30, and is configured to receive the radio frequency signal and amplify the radio frequency signal.
In this embodiment, the power amplifier 20 affects the second signal output through the first metal trace, and the first control circuit 131 can control the driving capability of the first driving circuit 111, so as to reduce the effect of the electromagnetic coupling caused by the power amplifier 20.
In another specific embodiment, as shown in fig. 8, the detection adjusting circuit further includes a second control circuit 132, the second control circuit 132 is respectively connected to the second driving circuit 112 and the first detecting circuit 12, and the input terminal of the second driving circuit 112 is connected to the first detecting circuit 12.
In this embodiment, the first metal trace between the first driving circuit 111 and the second driving circuit 112 is a long metal trace, that is, the distance between the first driving circuit 111 and the second driving circuit 112 is relatively longer than the distance between the power amplifier 20 and the second driving circuit 112, the power amplifier 20 affects the second signal output through the first metal trace, the first detecting circuit 12 directly detects the effect of the power amplifier 20 on the local oscillator output performance, and the first control circuit 131 and the second control circuit 132 are respectively used to control the driving capability of the first driving circuit 111 and the second driving circuit 112, so as to reduce the effect of the electromagnetic coupling caused by the power amplifier 20.
In other specific embodiments, as shown in fig. 9, the detection and adjustment circuit further includes a second detection circuit 14 and a third control circuit 133, the second detection circuit 14 is connected to the third control circuit 133 and the output end of the second driving circuit 112, respectively, the second driving circuit 112 is connected to the mixer 30 through a second metal trace, and the length of the second metal trace is greater than a second preset length; the specific circuit structures and functions of the first detection circuit 12 and the second detection circuit 14 are similar to those of the above embodiments, and are not described herein again.
In this embodiment, the second driving circuit 112 may output a fifth signal to the mixer 30, the first driving circuit 111, the first detecting circuit 12, and the first control circuit 131 form a closed loop circuit, the second driving circuit 112, the second detecting circuit 14, and the third control circuit 133 form a closed loop circuit, the first metal trace and the second metal trace are both long metal traces, the power amplifier 20 affects the second signal output by the first metal trace and the second signal output by the second metal trace, the effect of the power amplifier 20 on the signal performance may be detected by the first detecting circuit 12 and the second detecting circuit 14, the driving capability of the first driving circuit 111 and the driving capability of the second driving circuit 112 may be controlled by the first control circuit 131 and the third control circuit 133, respectively, so as to reduce the effect of the electromagnetic coupling caused by the power amplifier 20, and reduce the effect on the local oscillation signal, the method is beneficial to improving the frequency spectrum purity of the local oscillator.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (12)
1. A detection regulation circuit, comprising:
the driving circuit is used for receiving a first signal, processing the first signal and generating a second signal;
the detection circuit is connected with the driving circuit and used for detecting whether the parameter of the second signal meets a preset parameter condition or not and outputting a detection result;
and the control circuit is respectively connected with the drive circuit and the detection circuit and is used for generating a control signal according to the detection result so as to control the drive circuit, so that the parameter of the second signal output by the drive circuit meets the preset parameter condition.
2. The detection regulation circuit of claim 1, wherein the detection circuit comprises:
the first detection judgment circuit is used for detecting whether the phase noise of the second signal is within a preset phase noise range;
the second detection judgment circuit is used for detecting whether the amplitude of the second signal is within a preset amplitude range or not;
and the selection circuit is respectively connected with the first detection judgment circuit and the second detection judgment circuit and is used for outputting the detection result output by at least one of the first detection judgment circuit and the second detection judgment circuit to the control circuit.
3. The detection adjustment circuit of claim 2,
the parameter of the second signal is phase noise, when the detection circuit detects that the phase noise of the second signal is greater than the preset phase noise, the detection circuit outputs a detection result that the degree of interference on the second signal is greater than the preset influence degree, and the control circuit generates the control signal after receiving the detection result sent by the detection circuit, so that the driving capability of the driving circuit is improved.
4. The detection adjustment circuit according to claim 3, wherein the first detection judgment circuit comprises:
the frequency divider is used for carrying out frequency division processing on the second signal to obtain a third signal;
the time-to-digital converter is connected with the frequency divider and used for receiving a reference clock signal and the third signal, acquiring a phase difference signal between the reference clock signal and the third signal and converting the phase difference signal into a phase difference digital signal;
and the first comparison judgment circuit is connected with the time-to-digital converter and used for judging whether the phase difference digital signal is smaller than a preset phase difference digital signal or not and outputting the detection result.
5. The detection adjustment circuit of claim 2,
the parameter of the second signal is amplitude, when the detection circuit detects that the amplitude of the second signal is smaller than a preset amplitude, the detection circuit outputs a detection result that the degree of interference on the second signal is larger than a preset influence degree, and the control circuit generates the control signal after receiving the detection result sent by the detection circuit, so that the driving capability of the driving circuit is improved.
6. The detection adjustment circuit according to claim 5, wherein the second detection judgment circuit comprises:
an amplitude detection circuit for detecting the amplitude of the second signal;
and the second comparison and judgment circuit is connected with the amplitude detection circuit and used for judging whether the amplitude of the second signal is smaller than the preset amplitude or not and outputting the detection result.
7. The detection adjustment circuit of claim 2,
the parameters of the second signal comprise amplitude and phase noise, the detection circuit outputs a detection result that the degree of interference on the second signal is greater than a preset influence degree when detecting that the amplitude of the second signal is less than a preset amplitude and the phase noise of the second signal is greater than the preset phase noise, and the control circuit generates the control signal after receiving the detection result sent by the detection circuit, so that the driving capability of the driving circuit is improved.
8. The detection adjustment circuit of claim 1,
the driving circuit comprises a first driving circuit and a second driving circuit, the first driving circuit and the second driving circuit are connected through a metal wire, the first driving circuit is used for receiving the first signal and processing the first signal to obtain a second signal, and the second driving circuit is used for receiving a fourth signal, wherein the fourth signal is obtained by the first driving circuit transmitting the second signal to the second driving circuit through the metal wire;
the control circuit comprises a first control circuit and a second control circuit, the first drive circuit is respectively connected with the first control circuit and the detection circuit, and the second drive circuit is respectively connected with the second control circuit and the detection circuit.
9. A transmitter, comprising:
the detection adjusting circuit comprises a driving circuit, a detection circuit and a control circuit, wherein the driving circuit is used for receiving a first signal, processing the first signal and generating a second signal; the detection circuit is connected with the drive circuit and used for detecting whether the parameter of the second signal meets a preset parameter condition or not and outputting a detection result; the control circuit is respectively connected with the drive circuit and the detection circuit and is used for generating a control signal according to the detection result so as to control the drive circuit, so that the parameter of the second signal meets the preset parameter condition;
the frequency mixer is connected with the detection regulating circuit through a metal wire and used for receiving a baseband signal and a signal output by the detection regulating circuit and carrying out frequency mixing processing to obtain a radio frequency signal;
and the power amplifier is connected with the frequency mixer and used for receiving the radio-frequency signal and amplifying the radio-frequency signal.
10. A transmitter, comprising:
the detection adjusting circuit comprises a first driving circuit, a second driving circuit, a first detection circuit and a first control circuit, wherein the first driving circuit and the second driving circuit are connected through a first metal wire, the output end of the first driving circuit is connected with the first detection circuit, the first driving circuit is used for receiving and processing a first signal to obtain a second signal, and the second driving circuit is used for receiving a fourth signal; the fourth signal is a signal obtained by the first driving circuit transmitting the second signal to the second driving circuit by using the first metal wire, and the length of the first metal wire is greater than a first preset length; the first detection circuit is connected with the first driving circuit and used for detecting whether the parameter of the second signal meets a preset parameter condition or not and outputting a detection result; the first control circuit is connected with the first driving circuit and used for generating a control signal to control the first driving circuit according to the detection result so that the parameter of the second signal meets the preset parameter condition;
the frequency mixer is connected with the second driving circuit through a second metal wire and used for receiving the baseband signal and the signal output by the second driving circuit and carrying out frequency mixing processing to obtain a radio frequency signal;
and the power amplifier is connected with the frequency mixer and used for receiving the radio-frequency signal and amplifying the radio-frequency signal.
11. The transmitter of claim 10,
the control circuit further comprises a second control circuit, the second control circuit is connected with the second driving circuit, and the input end of the second driving circuit is connected with the first detection circuit.
12. The transmitter of claim 10,
the detection adjusting circuit further comprises a second detection circuit and a third control circuit, the second detection circuit is respectively connected with the third control circuit and the output end of the second driving circuit, the second driving circuit is connected with the frequency mixer through a second metal wire, and the length of the second metal wire is larger than a second preset length.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910944981.8A CN112583425B (en) | 2019-09-30 | 2019-09-30 | Detection regulating circuit and transmitter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910944981.8A CN112583425B (en) | 2019-09-30 | 2019-09-30 | Detection regulating circuit and transmitter |
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| Publication Number | Publication Date |
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| CN112583425A true CN112583425A (en) | 2021-03-30 |
| CN112583425B CN112583425B (en) | 2022-07-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910944981.8A Active CN112583425B (en) | 2019-09-30 | 2019-09-30 | Detection regulating circuit and transmitter |
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| EP2101188A1 (en) * | 2008-03-12 | 2009-09-16 | Research In Motion Limited | Multiple clock signal generation from a common oscillator |
| CN102025666A (en) * | 2010-12-15 | 2011-04-20 | 中兴通讯股份有限公司 | Method and device for realizing IQ signal correction in base station transmitter equipment |
| CN102386850A (en) * | 2011-08-25 | 2012-03-21 | 杭州士兰微电子股份有限公司 | Voltage controlled oscillation modulator circuit |
| CN103840846A (en) * | 2014-03-19 | 2014-06-04 | 嘉兴创德电子有限公司 | Suppression circuit for reducing local oscillating signal interference and transmitter-receiver |
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2019
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2101188A1 (en) * | 2008-03-12 | 2009-09-16 | Research In Motion Limited | Multiple clock signal generation from a common oscillator |
| CN102025666A (en) * | 2010-12-15 | 2011-04-20 | 中兴通讯股份有限公司 | Method and device for realizing IQ signal correction in base station transmitter equipment |
| CN102386850A (en) * | 2011-08-25 | 2012-03-21 | 杭州士兰微电子股份有限公司 | Voltage controlled oscillation modulator circuit |
| CN103840846A (en) * | 2014-03-19 | 2014-06-04 | 嘉兴创德电子有限公司 | Suppression circuit for reducing local oscillating signal interference and transmitter-receiver |
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| Publication number | Publication date |
|---|---|
| CN112583425B (en) | 2022-07-15 |
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