Frequency generator and communication device

Abstract

The utility model provides a frequency generator and a communication device. The frequency generator comprises a control circuit, a gating circuit, a receiving frequency generation circuit and a sending frequency generation circuit, the control circuit is respectively connected with the receiving frequency generating circuit and the transmitting frequency generating circuit through the gating circuit; wherein in a receiving time slot, the gating circuit is conducted with the receiving frequency generating circuit, and the receiving frequency generating circuit generates a first frequency; and in a sending time slot, the gating circuit and the sending frequency generating circuit are conducted, and the sending frequency generating circuit generates a second frequency. Through the mode, the receiving and transmitting frequency points of the control circuit can be set and the gating circuit can be controlled, so that the frequency points can be quickly switched and locked.

Description

Technical Field

[0001] The present application is applied to the technical field of electronic communications, and in particular relates to a frequency generator and a communication device. Background Art

[0002] The full-duplex function is the most important technical highlight of high-end models and is a control item in market bidding. Based on the time slot characteristics of the DMR (digital mobile radio system) system and the line locking time, most duplex models currently use two solutions: one is to use dual PLL (phase-locked loop) + independent VCO (voltage-controlled oscillator) for transmission and reception. The hardware of this solution is completely dependent on the phase-locked loop. If the phase-locked loop is discontinued, the product will face the risk of being unable to ship; the second is to use completely independent PLL+VCO for transmission and reception, but the hardware of this solution uses a completely independent peripheral circuit design, the circuit board occupies a large space, and both solutions require the transmission RF point to be locked in advance, which will cause adjacent frequency interference to the reception, thereby deteriorating the reception sensitivity and increasing the power consumption of the product. Utility Model Content

[0003] The present application provides a frequency generator to solve the problem of adjacent frequency interference to reception caused by the need to lock the transmission frequency point in advance.

[0004] In order to solve the above technical problems, the present application provides a frequency generator, including: a control circuit, a gating circuit, a receiving frequency generating circuit and a transmitting frequency generating circuit; the control circuit is connected to the receiving frequency generating circuit and the transmitting frequency generating circuit respectively through the gating circuit; wherein, in a receiving time slot, the gating circuit is connected to the receiving frequency generating circuit, and the receiving frequency generating circuit generates a first frequency; in a transmitting time slot, the gating circuit is connected to the transmitting frequency generating circuit, and the transmitting frequency generating circuit generates a second frequency.

[0005] Wherein, the receiving frequency generating circuit includes a first conversion circuit and a first voltage-controlled oscillation circuit, the first conversion circuit includes a first storage circuit, and the first storage circuit is connected to the control circuit through a gating circuit;

[0006] During the last set duration of the receiving time slot, the gating circuit is connected to the transmitting frequency generating circuit, and the receiving frequency generating circuit is powered by the first storage circuit.

[0007] Among them, the first conversion circuit also includes a digital-to-analog conversion circuit, which is connected to the first storage circuit and the first voltage-controlled oscillation circuit. The digital-to-analog conversion circuit is used to convert the current signal of the control circuit into a voltage signal corresponding to the first frequency, and transmit the voltage signal to the first voltage-controlled oscillation circuit.

[0008] The first conversion circuit includes a low-pass filter, and the low-pass filter is connected to the first storage circuit and the first voltage-controlled oscillation circuit.

[0009] Wherein, the transmission frequency generating circuit includes a second conversion circuit and a second voltage-controlled oscillation circuit, the second conversion circuit includes a second storage circuit, and the second storage circuit is connected to the control circuit through a gating circuit;

[0010] During the last set time length of the transmission time slot, the gating circuit is turned on with the receiving frequency generating circuit, and the transmission frequency generator is powered by the second storage circuit.

[0011] Among them, the first voltage-controlled oscillator circuit includes at least two first voltage-controlled oscillators, a receiving switch is connected in series between the first conversion circuit and the first voltage-controlled oscillator circuit, and the receiving switch is used to connect one of the at least two voltage-controlled oscillators to the first conversion circuit; the second voltage-controlled oscillator circuit includes at least two second voltage-controlled oscillators, a sending switch is connected in series between the second conversion circuit and the second voltage-controlled oscillator circuit, and the sending switch is used to connect one of the at least two second voltage-controlled oscillators to the second conversion circuit.

[0012] Among them, the selection circuit includes a first switch and a second switch. In the receiving time slot, the control circuit is connected to the receiving frequency generating circuit through the first switch, and the first frequency signal is fed back to the control circuit through the second switch; in the sending time slot, the control circuit is connected to the sending frequency generating circuit through the first switch, and the second frequency signal is fed back to the control circuit through the second switch.

[0013] The control circuit includes an input end and an output end, the input end is connected to the output end of the second switch, and the output end is connected to the input end of the first switch.

[0014] The frequency generating circuit further includes a third switch, a signal amplifier and a filter; one end of the signal amplifier is connected to the filter, and the other end is connected to the output end of the receiving frequency generating circuit or the output end of the transmitting frequency generating circuit through the third switch.

[0015] To solve the above problems, the present application also provides a communication device, which includes any one of the frequency generators described above.

[0016] The beneficial effects of the present application are: different from the prior art, the present application can realize the cyclic conduction between the control circuit and the receiving frequency generating circuit and the transmitting frequency generating circuit through the gating circuit, and can arbitrarily set two frequency points in the control circuit, so as to set the receiving and transmitting frequency points of the control circuit and control the gating circuit to realize rapid switching and locking of the frequency points. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a structural block diagram of an embodiment of a frequency generator of the present application;

[0018] Figure 2 It is the working timing diagram of the frequency generator of the present application;

[0019] Figure 3 is a structural block diagram of another embodiment of the frequency generator of the present application;

[0020] Figure 4 is a structural block diagram of an embodiment of a first conversion circuit of the present application;

[0021] Figure 5 is a structural block diagram of an embodiment of a second conversion circuit of the present application;

[0022] Figure 6 It is a structural schematic diagram of an embodiment of a frequency generator of the present application. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0024] It should be noted that if the embodiments of the present application involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0025] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0026] See also Figure 1 , Figure 1 It is a structural block diagram of an embodiment of a frequency generator provided by the present application.

[0027] The present application provides a frequency generator, such as Figure 1As shown, a frequency generator of the present embodiment includes a control circuit 10, a gating circuit 20, a receiving frequency generating circuit 30 and a transmitting frequency generating circuit 40. The control circuit 10 is connected to the receiving frequency generating circuit 30 and the transmitting frequency generating circuit 40 respectively through the gating circuit 20. Among them, the control circuit 10 is used to transmit two frequency points that can be arbitrarily set, and can specifically be a phase-locked loop chip. The phase-locked loop chip in this embodiment can be a LMX2571 chip, which is only shown here as an example and is not intended to be limiting. The gating circuit 20 is used to select the on and off of the control circuit 10, the receiving frequency generating circuit 30 and the transmitting frequency generating circuit 40, and can be a double-control switch. A frequency generator is a signal source that generates a frequency accuracy of a fixed value, such as Figure 2 As shown, Figure 2 1 is a working timing diagram of the frequency generator, taking two adjacent time slots as an example for explanation, from left to right they are the first time slot and the second time slot, wherein the first time slot may be a receiving time slot and the second time slot may be a transmitting time slot. In the receiving time slot, the gating circuit 20 is connected to the receiving frequency generating circuit 30, and the receiving frequency generating circuit 30 generates the first frequency. In the transmitting time slot, the gating circuit 20 is connected to the transmitting frequency generating circuit 40, and the transmitting frequency generating circuit 40 generates the second frequency.

[0028] In an optional embodiment, the control circuit 10 connects the receiving frequency generating circuit 30 and the transmitting frequency generating circuit 40 through the selection circuit 20. Any two preset frequency points can be set in the control circuit 10. When the control circuit 10 turns on the receiving frequency generating circuit 30 and the transmitting frequency generating circuit 40 respectively, the receiving frequency generating circuit 30 and the transmitting frequency generating circuit 40 can generate different frequencies according to the frequency points set in the control circuit 10 to receive and send different signals.

[0029] Furthermore, the control circuit 10 can be cyclically connected with the receiving frequency generating circuit 30 and the transmitting frequency generating circuit 40 through the gating circuit 20. In the receiving time slot, the gating circuit 20 is connected with the receiving frequency generating circuit 30, so that the receiving frequency generating circuit 30 generates a first frequency signal. In the transmitting time slot, the gating circuit 20 is connected with the transmitting frequency generating circuit 40, so that the transmitting frequency generating circuit 40 generates a second frequency signal. That is, by operating the receiving and transmitting frequency points of the control circuit 10 and controlling the gating circuit 20, the frequency points can be quickly switched and locked.

[0030] During the receiving time slot, the control circuit 10 is connected to the receiving frequency generating circuit 30 through the gating circuit 20, so that the control circuit 10 and the receiving frequency generating circuit 30 form a loop. After the gating circuit 20 is disconnected from the receiving frequency generating circuit 30, the gating circuit 20 connects the control circuit 10 and the transmitting frequency generating circuit 40 to enter the transmitting time slot, so that the control circuit 10 and the transmitting frequency generating circuit 40 form a loop, that is, the gating circuit 20 controls the receiving frequency generating circuit 30 and the transmitting frequency generating circuit 40 to be cyclically turned on. For further information, please refer to Figure 6 Feedback signals are outputted at the output ends of the receiving frequency generating circuit 30 and the transmitting frequency generating circuit 40. The control circuit 10 can receive the feedback signals and calibrate the frequency signals of the receiving frequency generating circuit 30 and the transmitting frequency generating circuit 40 according to the feedback signals.

[0031] In the above embodiment, the control circuit 10 and the receiving frequency generating circuit 30 and the transmitting frequency generating circuit 40 can be cyclically connected through the enabling circuit 20, and two frequency points can be arbitrarily set in the control circuit 10, so that the receiving and transmitting frequency points of the control circuit 10 can be set and the enabling circuit 20 can be controlled to achieve rapid switching and locking of the frequency points.

[0032] In an optional embodiment, if Figure 3 and Figure 4 As shown, the receiving frequency generating circuit 30 includes a first conversion circuit 301 and a first voltage controlled oscillation circuit 302. The first conversion circuit 301 includes a first storage circuit 3011. The first storage circuit 3011 is connected to the control circuit 10 through the gating circuit 20. During the last set duration of the receiving time slot, the gating circuit 20 is connected to the transmitting frequency generating circuit 40, and the receiving frequency generating circuit 30 is powered by the first storage circuit 3011. The last set duration is less than 1.5 milliseconds. Please refer to Figure 2 The protocol from the first time slot to the second time slot is 1.5 milliseconds. Therefore, in this embodiment, the energy stored in the first storage circuit 3011 can lock the frequency point within 1.5 milliseconds when the gating circuit 20 and the receiving frequency generating circuit 30 are turned on. Figure 5As shown, the transmission frequency generating circuit 40 includes a second conversion circuit 401 and a second voltage-controlled oscillation circuit 402, and the second conversion circuit 401 includes a second storage circuit 4011. The second storage circuit 4011 is connected to the control circuit 10 through the gating circuit 20. During the last set duration of the transmission time slot, the gating circuit 20 is connected to the receiving frequency generating circuit 30, and the transmission frequency generating circuit 40 is powered by the second storage circuit 4011. The last set duration is less than 1.5 milliseconds. The first storage circuit 3011 and the second storage circuit 4011 have the characteristics of energy storage and can be a bidirectional blocking circuit. For example, when entering the transmission time slot from the last set duration of the receiving time slot, the first storage circuit 3011 is bidirectionally blocked, and the first storage circuit 3011 does not need to be powered, so that the energy consumption of the first storage circuit 3011 is extremely small, and when entering the receiving time slot later, it can directly power the receiving frequency generating circuit 30.

[0033] That is, in this embodiment, during the reception time slot, the control circuit 10 is connected to the reception frequency generation circuit 30 through the gate circuit 20, so that the first voltage-controlled oscillation circuit 302 generates a frequency signal. During the transmission time slot, the control circuit 10 is connected to the transmission frequency generation circuit 40 through the gate circuit 20, so that the second voltage-controlled oscillation circuit 402 generates a frequency signal. Further, the first storage circuit 3011 and the second storage circuit 4011 are both connected to the control circuit 10 through the gate circuit 20. The gating circuit 20 is used to make the control circuit 10, the receiving frequency generating circuit 30 and the transmitting frequency generating circuit 40 cyclically connected, that is, within the last set duration of the receiving time slot, the gating circuit 20 is disconnected from the receiving frequency generating circuit 30 and connected to the transmitting frequency generating circuit 40. Since the transmitting frequency generating circuit 40 is provided with a second storage circuit 4011, the control circuit 10 does not need to re-store energy in the second storage circuit 4011 by utilizing the energy storage characteristics of the second storage circuit 4011. The second storage circuit 4011 directly supplies energy to the second voltage-controlled oscillation circuit 402, and the frequency switching and locking can be completed in a very short time, so that the transmitting frequency generating circuit 40 generates a frequency signal.

[0034] Further, within the last set duration of the transmission time slot, the gating circuit 20 is disconnected from the transmission frequency generating circuit 40 and connected to the receiving frequency generating circuit 30, and the first storage circuit 3011 supplies energy to the first voltage-controlled oscillation circuit 302, and the control circuit 10 does not need to re-store energy in the first storage circuit 3011, so that the receiving frequency generating circuit 30 can generate a frequency signal. It should be noted that, since the first storage circuit 3011 and the second storage circuit 4011 have the characteristics of energy storage, it is not necessary to re-store energy in the first storage circuit 3011 and the second storage circuit 4011, that is, in the switching process of the two frequency points, it is not necessary to generate a frequency signal before the last set duration of the receiving time slot or the transmitting time slot. Therefore, when the gating circuit 20 is cyclically connected with the receiving frequency generating circuit 30 and the transmitting frequency generating circuit 40, adjacent frequency interference will not be caused during reception or transmission, thereby improving the sensitivity of the receiving and transmitting frequencies and reducing power loss.

[0035] In an optional embodiment, if Figure 4 As shown, the first conversion circuit 301 also includes a digital-to-analog conversion circuit 3012, which is connected to the first storage circuit 3011 and the first voltage-controlled oscillation circuit 302. The digital-to-analog conversion circuit 3012 is used to convert the current signal of the control circuit 10 into a voltage signal corresponding to the first frequency, and transmit the voltage signal to the first voltage-controlled oscillation circuit 302. Therefore, after the output end of the control circuit 10 emits a current signal, the digital-to-analog conversion circuit 3012 converts the current signal into a voltage signal corresponding to the first frequency, and transmits the voltage signal to the first voltage-controlled oscillation circuit 302, so that the first voltage-controlled oscillation circuit 302 generates a frequency signal. Further, as Figure 5 As shown, the second conversion circuit 401 also includes a digital-to-analog conversion circuit 4012, which can receive the current signal emitted by the control circuit 10, and convert the current signal into a voltage signal corresponding to the second frequency, and transmit the voltage signal to the second voltage-controlled oscillation circuit 402, so that the second voltage-controlled oscillation circuit 402 generates a frequency signal.

[0036] In an optional embodiment, if Figure 4 As shown, the first conversion circuit 301 includes a low-pass filter 3013, and the low-pass filter 3013 is connected to the first storage circuit 3011 and the first voltage-controlled oscillation circuit 302. Therefore, the current signal sent by the control circuit 10 can be filtered by the low-pass filter 3013 to reduce interference. Figure 5 As shown, a low-pass filter 4013 is also provided in the second conversion circuit 401 to reduce interference.

[0037] See also Figure 6The first voltage-controlled oscillator circuit 302 includes at least two first voltage-controlled oscillators (RX VCOs), a receiving switch 303 is connected in series between the first conversion circuit 301 and the first voltage-controlled oscillator circuit 302, and the receiving switch 303 is used to conduct one of the at least two voltage-controlled oscillators with the first conversion circuit 301. The second voltage-controlled oscillator circuit 402 includes at least two second voltage-controlled oscillators (TX VCOs), a transmitting switch 403 is connected in series between the second conversion circuit 401 and the second voltage-controlled oscillator circuit 402, and the transmitting switch 403 is used to conduct one of the at least two second voltage-controlled oscillators with the second conversion circuit 401. That is, the receiving switch 303 can be used to control the on / off of the first conversion circuit 301 and the first voltage-controlled oscillation circuit 302, and the first conversion circuit 301 can be controlled to be connected to different first voltage-controlled oscillators to generate first frequency signals with different frequencies; the sending switch 403 can be used to control the on / off of the second conversion circuit 401 and the second voltage-controlled oscillation circuit 402, and the second conversion circuit 401 can be controlled to be connected to different second voltage-controlled oscillators to generate second frequency signals with different frequencies.

[0038] In this embodiment, during the receiving time slot, the control circuit 10 is connected to the receiving frequency generating circuit 30 through the gating circuit 20, and the control circuit 10 and the receiving frequency generating circuit 30 form a loop through the receiving switch 303, so that the receiving frequency generating circuit 30 generates a frequency signal. During the last set duration of the receiving time slot, the gating circuit 20 is disconnected from the receiving frequency generating circuit 30, and the receiving switch 303 is controlled to disconnect the first conversion circuit 301 from the first voltage-controlled oscillation circuit 302. At this time, the receiving end and the output end of the first storage circuit 3011 are disconnected from other circuits, so that the first storage circuit 3011 does not need to be powered, and the energy storage consumption is extremely small, that is, when entering the receiving time slot from the last set duration of the sending time slot, the control circuit 10 and the receiving frequency generating circuit 30 are directly connected to the first storage circuit 3011 to form a loop, and the receiving frequency generating circuit 30 can be directly powered through the first storage circuit 3011, which will not cause adjacent frequency interference and reduce power loss.

[0039] When entering the transmission time slot, the gating circuit 20 disconnects the control circuit 10 from the receiving frequency generating circuit 30, and the gating circuit 20 is connected to the control circuit 10 and the transmitting frequency generating circuit 40. At the same time, the transmitting switch 403 is connected to the second conversion circuit 401 and the second voltage-controlled oscillation circuit 402, so that the control circuit 10 and the transmitting frequency generating circuit 40 are connected to form a loop, and the transmitting frequency generating circuit 40 can also be directly powered by the second storage circuit 4011. Therefore, the control circuit 10, the receiving frequency generating circuit 30 and the transmitting frequency generating circuit 40 can be cyclically connected through the gating circuit 20, the receiving switch 303 and the transmitting switch 403, and the frequency point can be quickly switched and locked through the energy storage characteristics of the first storage circuit 3011 and the second storage circuit 4011. Among them, when the gating circuit 20 and the receiving frequency generating circuit 30 are disconnected or connected, the receiving switch 303 is disconnected or connected at the same time, and when the gating circuit 20 and the transmitting frequency generating circuit 40 are disconnected or connected, the transmitting switch 403 is disconnected or connected at the same time.

[0040] In an optional embodiment, if Figure 1 As shown, the gating circuit 20 includes a first switch 201 and a second switch 202. In the receiving time slot, the control circuit 10 is connected to the receiving frequency generating circuit 30 through the first switch 201, and the first frequency signal is fed back to the control circuit 10 through the second switch 202. In the transmitting time slot, the control circuit 10 is connected to the transmitting frequency generating circuit 40 through the first switch 201, and the second frequency signal is fed back to the control circuit through the second switch 202. Among them, the first switch 201 and the second switch 202 can be set as a single-pole double-throw switch, and the first switch 201 and the second switch 202 can also be set as a double-pole four-throw switch, which is not specifically limited in this application.

[0041] Further, the control circuit 10 includes an input end and an output end, the input end is connected to the output end of the second switch 202, and the output end is connected to the input end of the first switch 201. Therefore, during the reception time slot, the output end of the control circuit 10 is connected to the input end of the first switch 201, and the input end is connected to the output end of the second switch 202, that is, the control circuit 10 and the receiving frequency generating circuit 30 are respectively turned on through the first switch 201 and the second switch 202 to form a loop, thereby generating a frequency signal, or the control circuit 10 and the transmitting frequency generating circuit 40 are turned on to form a loop, thereby sending out a frequency signal.

[0042] In an optional embodiment, if Figure 3 and Figure 6As shown, the frequency generating circuit further includes a third switch 503, a signal amplifier 501 and a filter 502; one end of the signal amplifier 501 is connected to the filter 502, and the other end is connected to the output end of the receiving frequency generating circuit 30 or the output end of the transmitting frequency generating circuit 40 through the third switch 503. Therefore, the signal amplifier 501 is turned on the receiving frequency generating circuit 30 or the transmitting frequency generating circuit 40 respectively through the third switch 503, and the frequency signal of the receiving frequency generating circuit 30 or the transmitting frequency generating circuit 40 can be amplified through the signal amplifier 501. After the frequency signal is amplified, the amplified signal can be filtered through the filter 502 to reduce subsequent interference. The signal amplifier 501 is controlled by the third switch 503 to connect to the output end of the receiving frequency generating circuit 30 or the output end of the transmitting frequency generating circuit 40, so as to realize switching between the receiving time slot and the transmitting time slot.

[0043] In a specific implementation, Figure 6 As shown, in the last duration of the transmission time slot, the control circuit 10 is connected to the receiving frequency generating circuit 30 through the gating circuit 20, that is, the first switch 201 and the second switch 202 are disconnected from the transmission frequency generating circuit 40 and connected to the receiving frequency generating circuit 30 at the same time, and the receiving switch 303 is connected to the first voltage-controlled oscillating circuit 302, so that the receiving frequency generating circuit 30 is connected to the input end and the output end of the control circuit 10 to form a loop, and generate a first frequency signal. In the last duration of the receiving time slot, the control circuit 10 is connected to the transmission frequency generating circuit 40 through the gating circuit 20, that is, the first switch 201 and the second switch 202 are disconnected from the receiving frequency generating circuit 30 and connected to the transmitting frequency generating circuit 40 at the same time, and the receiving switch 303 is disconnected from the first voltage-controlled oscillating circuit 302, so that the first storage circuit 3011 does not need to supply energy to the external device, and at this time, the transmitting switch 403 is connected to the second voltage-controlled oscillating circuit 402 to form a loop, and generate a second frequency signal. That is to say, the receiving frequency generating circuit 30 and the transmitting frequency generating circuit 40 can be controlled to be cyclically turned on through the selection circuit 20, the receiving switch 303, and the transmitting switch 403, and the first storage circuit 3011 can store energy, and when entering the receiving time slot from the transmitting time slot, the first storage circuit 3011 can directly power the first voltage-controlled oscillating circuit 302. Similarly, when entering the transmitting time slot from the receiving time slot, the second storage circuit 4011 can directly power the second voltage-controlled oscillating circuit 402, thereby realizing fast switching and locking of the frequency point, which can effectively meet the duplex working mode of the digital mobile radio system.

[0044] In the above manner, the present application can operate the receiving and transmitting frequency of the control circuit 10 by the selection circuit 20 to operate the control circuit 10 and the receiving frequency generating circuit 30 and the transmitting frequency generating circuit 40 in a cyclic manner, realize the rapid switching and locking of the frequency, and can match the two preset frequency points and pump current in the control circuit 10. By setting the first storage circuit 3011 in the receiving frequency generating circuit 30 and utilizing the energy storage characteristics of the first storage circuit 3011, the first voltage-controlled oscillation circuit 302 can be directly powered when entering the receiving time slot later, and by setting the second storage circuit 4011 in the transmitting frequency generating circuit 40 and utilizing the energy storage characteristics of the second storage circuit 4011, the second voltage-controlled oscillation circuit 402 can be directly powered when entering the transmitting time slot later, thereby realizing the rapid switching and locking of the frequency.

[0045] The present application can use the digital-to-analog conversion circuit 3012 to convert the current signal output by the control circuit 10 into a voltage signal corresponding to the first frequency by setting a digital-to-analog conversion circuit 3012 in the first conversion circuit 301, and transmit the voltage signal to the first voltage-controlled oscillation circuit 302. By setting a low-pass filter 3013 in the first conversion circuit 301, the current signal sent by the control circuit 10 can be filtered to reduce interference. By connecting a receiving switch 303 in series between the first conversion circuit 301 and the first voltage-controlled oscillation circuit 302, and connecting a sending switch 403 in series between the second conversion circuit 401 and the second voltage-controlled oscillation circuit 402, the first storage circuit 3011 and the second storage circuit 4011 are not connected to external components when disconnected, so that the energy storage consumption of the first storage circuit 3011 and the second storage circuit 4011 is extremely small.

[0046] The present application can control the cyclic conduction of the receiving frequency generating circuit 30 and the transmitting frequency generating circuit 40 by setting the first switch 201 and the second switch 202 in the gating circuit 20. By setting the signal amplifier 501 and the filter 502 on the frequency generating circuit, the frequency signal received and transmitted can be amplified, and the amplified signal can be filtered by the filter 502.

[0047] The present application also provides a communication device, which includes: a frequency generator, which is arranged in the communication device, and the frequency generator is the frequency generator of any of the above-mentioned embodiments.

[0048] The above description is only an implementation method of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A frequency generator, characterized in that: The frequency generator comprises: A control circuit, a gating circuit, a receiving frequency generating circuit and a transmitting frequency generating circuit; the control circuit is connected to the receiving frequency generating circuit and the transmitting frequency generating circuit respectively through the gating circuit; Among them, in the receiving time slot, the gating circuit is connected to the receiving frequency generating circuit, and the receiving frequency generating circuit generates a first frequency; in the sending time slot, the gating circuit is connected to the sending frequency generating circuit, and the sending frequency generating circuit generates a second frequency.

2. The frequency generator according to claim 1, characterized in that The receiving frequency generating circuit includes a first conversion circuit and a first voltage-controlled oscillation circuit, the first conversion circuit includes a first storage circuit, and the first storage circuit is connected to the control circuit through the gating circuit; During the last set duration of the receiving time slot, the gating circuit is connected to the transmitting frequency generating circuit, and the receiving frequency generating circuit is powered by the first storage circuit.

3. The frequency generator according to claim 2, characterized in that: The first conversion circuit also includes a digital-to-analog conversion circuit, which is connected to the first storage circuit and the first voltage-controlled oscillation circuit. The digital-to-analog conversion circuit is used to convert the current signal of the control circuit into a voltage signal corresponding to the first frequency, and transmit the voltage signal to the first voltage-controlled oscillation circuit.

4. The frequency generator according to claim 2, characterized in that: The first conversion circuit further includes a low-pass filter, and the low-pass filter is connected to the first storage circuit and the first voltage-controlled oscillation circuit.

5. The frequency generator according to claim 2, characterized in that: The transmission frequency generating circuit includes a second conversion circuit and a second voltage-controlled oscillation circuit, the second conversion circuit includes a second storage circuit, and the second storage circuit is connected to the control circuit through the gating circuit; During the last set duration of the transmission time slot, the gating circuit is connected to the receiving frequency generating circuit, and the transmitting frequency generating circuit is powered by the second storage circuit.

6. The frequency generator according to claim 5, characterized in that: The first voltage-controlled oscillator circuit includes at least two first voltage-controlled oscillators, a receiving switch is connected in series between the first conversion circuit and the first voltage-controlled oscillator circuit, and the receiving switch is used to connect one of the at least two voltage-controlled oscillators to the first conversion circuit; the second voltage-controlled oscillator circuit includes at least two second voltage-controlled oscillators, a sending switch is connected in series between the second conversion circuit and the second voltage-controlled oscillator circuit, and the sending switch is used to connect one of the at least two second voltage-controlled oscillators to the second conversion circuit.

7. The frequency generator according to claim 1, characterized in that: The gating circuit includes a first switch and a second switch. In a receiving time slot, the control circuit is connected to the receiving frequency generating circuit through the first switch, and the first frequency signal is fed back to the control circuit through the second switch; In the transmission time slot, the control circuit is connected to the transmission frequency generating circuit through the first switch, and the second frequency signal is fed back to the control circuit through the second switch.

8. The frequency generator according to claim 7, characterized in that: The control circuit includes an input end and an output end, the input end is connected to the output end of the second switch, and the output end is connected to the input end of the first switch.

9. The frequency generator according to claim 1, characterized in that: The frequency generating circuit further includes a third switch, a signal amplifier and a filter; One end of the signal amplifier is connected to the filter, and the other end is connected to the output end of the receiving frequency generating circuit or the output end of the transmitting frequency generating circuit through the third switch.

10. A communication device, characterized in that: The communication device comprises the frequency generator according to any one of claims 1 to 9.

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