TWI226755B - Fast frequency synthesizing and modulating apparatus and method - Google Patents

Abstract

A fast frequency synthesizing and modulating apparatus and method is provided, which includes a first phase lock loop (PLL) and a second phase lock loop. The first lock loop makes sure that the output modulated signal can keep the stability fixed according to a reference frequency signal with high precision. Then, the miss sampling of the transmission data can be improved. The second phase lock loop is linked to the microcomputer controller to pre-store the each control voltage of each band frequency into a master control panel. Then, the master control panel can provide a predetermined control voltage in accordance with the working frequency. By this way, the speed of the frequency hopping can be accelerated.

Description

1226755 V. Description of the invention (1) The technical domain to which the invention belongs Specially, the previous invention is related to technology As the whole gets more and more important, convenience can be assisted. And in the news. Because I want to communicate information. In recent years, the traditional content in wireless communication has been processed, and the transmitter will process the allowable error analog signal end transmitted by this signal. Traditional uses include: In addition to receiving one, it is related to a world view. If there is a fast communication technology, in addition to the data, most of the wireless will be replaced by the No. 1 RF range. Of course, the reference received in the frequency bit is a reference to the no-speed interface. This is a method of using the point distance wirelessly and half way to digitize the digital signal in the radio frequency synthesizer and frequency line communication system. Frequency hopping processing technology Frequency synthesis and modulation technology. And the message of the same country is now away, but the communication conductor also chooses to communicate. The number can receive the analogy. Unfortunately, the transmission technology is the most used, but the frequency is used to receive it. The signal communication happened to attract the wired, and the digital is almost universal, and the radio transmitter is received by the radio frequency conversion technology. If the frequency-transmitting class is time-critical or the analogy of the transmission is significant, the country and the destination will be more successful. Therefore, the sender is more important than the signal adjuster because of the signal bit. The two places effectively use the numbers processed today, and use the data of the square digits of the phase rate with the wireless communication of each country that keeps the communication form after transmission. The source material consists of a frequency divider and a voltage-controlled oscillator by transmitting the transmitter at one output, receiving it, and then using the basic phase-locked loop used for modulation. Phase detector The signal input is electrically connected to the voltage-controlled oscillator.

III II Circle III 11210twf.ptd Page 5 1226755 V. Description of the invention (2) Oscillator and frequency divider. The voltage controlled oscillator is responsible for outputting the oscillation signal. The phase detector is used to compare the phase of the input reference frequency signal and the signal output by the divider. The frequency divider divides the oscillating signal output by the voltage controlled oscillator and sends it to the phase detector. The voltage-controlled oscillator receives the signal output by the phase detector, provides an output signal after oscillation, and sends the output signal to the frequency divider. It is well known that quartz crystals have extremely stable resonance characteristics and very high selectivity (ie, Q value). When used on an oscillator, the output of the oscillator can maintain a very accurate and stable frequency, that is, high stability. . However, the voltage-controlled oscillator used in the conventional phase-locked loop is not a crystal oscillator with high stability, so it needs to have a stable reference frequency and perform feedback frequency-locked operation. However, traditional phase-locked loops will lose data when the frequency is locked fast. In addition, in the traditional phase-locked loop, the modulation amount of the frequency band needs a loop cycle time to obtain the modulation amount data. In addition to the inability to control the precise amount of modulation, the frequency-locking speed also becomes difficult to grasp. In addition, the frequency divider uses a fixed value to perform the frequency division operation, which causes a problem that the frequency hopping speed between the high frequency band and the low frequency band is difficult to control. Based on the above, it can be known that when using a conventional single phase-locked loop for frequency synthesis and modulation, there will be the following disadvantages: (1) When the traditional single phase-locked loop encounters a fast frequency-locking speed, it will cause low frequency. The modulation response is poor, so data and data cannot be transmitted normally, and even data loss may occur; (2) The traditional single phase-locked loop is difficult to control due to the modulation between the high and low frequency bands, and it is very difficult to master the frequency-locking speed ;

112101 w f. Ptd Page 6 1226755 V. Explanation of the invention (3) (3) When the traditional single phase locked loop is dense, the frequency hopping speed between the high frequency band and the low frequency band is too slow to meet the current communication era Demand. SUMMARY OF THE INVENTION In view of this, the present invention is to improve the shortcomings of the prior art: 1. The problem of data loss when the low-frequency modulation responds poorly; 2. The modulation amount is difficult to control and the frequency lock speed is difficult to grasp; 3. The frequency hopping speed is not fast enough Problem. One of the effects of this invention is to provide a signal with high stability and flat modulation, which solves the problem of data loss; the second is to adjust the amount of modulation of the frequency and is easy to control; the third is to provide a preset voltage Speed up frequency hopping. The invention provides a fast frequency synthesizing and modulating device. The device includes a first phase locked loop and a second phase locked loop. The first phase-locked loop is based on the input data signal and a precise reference frequency signal to modulate and oscillate a modulation signal with the data loaded in the middle, and then output to the second phase-locked loop. The second phase-locked loop is connected after the aforementioned first phase-locked loop, and it oscillates an output modulation signal according to the modulation signal of the previously loaded data and a frequency-hopping reference frequency signal. The second phase-locked loop includes an output voltage-controlled oscillator, and the second phase-locked loop supplies a pre-biased voltage to the output voltage-controlled oscillator according to a pre-adjusted bias voltage data, so as to quickly oscillate the output voltage-controlled oscillator. Output modulation signal. In a preferred embodiment of the present invention, the first phase-locked loop includes: a first phase detector, a first voltage-controlled oscillator, a first frequency divider, and a second frequency divider. The first voltage-controlled oscillator is electrically connected to the first phase detection.

11210rwf.ptd Page 7 1226755 V. Description of the Invention (4) The first frequency divider is connected to the first phase detector and the first voltage controlled oscillator. The first phase detector is used to compare a first reference frequency signal and a first frequency-divided signal, and then output a first voltage control signal. The aforementioned first reference frequency signal is a signal obtained by dividing the frequency of the accurate reference frequency signal by the second frequency divider. The first voltage-controlled oscillator is based on the aforementioned first voltage-controlled oscillation signal and the input data signal, and oscillates and modulates the modulation signal of the above-mentioned intermediate data. The first frequency divider divides the modulation signal of the previously loaded data described above to obtain a first frequency division signal. In addition, in a preferred embodiment of the present invention, the second phase-locked loop is in addition to output voltage control. In addition to the oscillator, it also includes a second phase detector, a loop filter, a first mixer, a first low-pass filter, a third frequency divider, a second mixer, and a second low-pass filter. The loop filter is electrically connected to the second phase detector and the aforementioned output voltage-controlled oscillator; the first mixer is electrically connected to the output voltage-controlled oscillator; the first low-pass filter is electrically connected To the first mixer; the third frequency divider is electrically connected to the second phase detector; the second low-pass filter is electrically connected to the second mixer. The second phase detector is used to compare an intermediate frequency modulation signal and a second frequency division signal of the loaded data, and output an error signal. Among them, the intermediate frequency modulation signal of the previously loaded data is a signal obtained by processing the modulation signal of the middle loaded data. The loop filter obtains the second voltage-controlled signal after filtering the error signal. The first mixer obtains a first mixed signal after mixing the output modulation signal with a frequency hopping reference signal. First low-pass filter After filtering the aforementioned first mixed frequency signal, an output intermediate frequency data is obtained

11210twf.ptd Page 8 1226755 V. Description of the invention (5) Material signal. The third frequency divider divides the output intermediate frequency data signal obtained previously to obtain a second frequency division signal. The second mixer mixes the intermediate loaded data modulation signal output from the first phase-locked loop and the second reference frequency signal to obtain a second mixed signal. The second low-pass filter filters the second frequency mixing signal mentioned above to obtain the intermediate frequency modulation signal of the loaded data. The invention also introduces a method for fast frequency synthesis and modulation, which includes the following steps: firstly providing a high-stability accurate reference frequency signal; and then modulating and oscillating according to an input data signal and the aforementioned precise reference frequency signal An intermediate loaded data modulation signal; then provide a frequency hopping reference frequency signal and a pre-adjusted bias data; and provide a pre-set bias based on the pre-adjusted bias data mentioned above; and finally according to the intermediate loaded data The data modulation signal and the frequency-hopping reference frequency signal oscillate an output modulation signal. Among them, according to the pre-adjusted bias data, the aforementioned output modulation signal is quickly oscillated. In order to make the above and other objects, features, and advantages of the present invention more comprehensible, a preferred embodiment is described below in detail with the accompanying drawings as follows: Embodiments: The present invention proposes a fast frequency Synthesis and modulation device and method. FIG. 1 is a block diagram of a fast frequency synthesizing and modulating device according to a preferred embodiment of the present invention, which includes a first phase-locked loop 1200 and a second phase-locked loop 1300. FIG. 2 is a schematic block diagram of a circuit of a preferred embodiment of the first phase locked loop. FIG. 3 is a schematic circuit block diagram of a preferred embodiment of the second phase locked loop.

112101 w f. Ptd Page 9 1226755 V. Mengming description (6) Please refer to Figure 1 and Figure 2 at the same time, where the first phase-locked loop includes: first phase detector 1 2 1 〇, first The voltage controlled oscillator 2 2 0, the first frequency division is 1 2 2 5 and the second frequency divider 1 2 0 5. The connection situation is that the first voltage-controlled oscillator 1 2 2 0 is electrically connected to the first phase detector 1 2 1 〇; the first frequency divider 1 2 2 5 is connected to the first phase detector 1 2 10 and the first voltage-controlled vibrator 1 2 2 0. Its work is to modulate and oscillate an intermediate loaded data modulation signal according to the input data signal and an accurate reference frequency signal. One purpose of the output signal is a highly stable and flat data modulation signal. Please refer to Figure 1 and Figure 3 at the same time. The second phase-locked loop includes a multi-band voltage-controlled vibrator 1 320 and a frequency-locked loop. The aforementioned frequency-locked loop includes: second phase detector 1 3 3 0, loop filter, wave filter 1 3 1 5, first mixer surface | 1345, first low-pass filter 1340, third division A frequency converter 1325, a second low-pass filter 1310, a second mixer 1305, a digital / analog conversion pre-bias circuit 1335, and a multi-band voltage controlled oscillator 1320. The connection situation is that the loop filter 1 3 1 5 is electrically connected to the second phase detector 1 3 3 0 and the multi-band voltage controlled oscillator 1 3 2 0; the first mixer 1 3 4 5 is electrically connected to at most Band voltage controlled oscillator 1 3 2 0; first low-pass filter 1 3 4 0 electrically connected to the first mixer 1 3 4 5; third frequency divider 1 3 2 5 electrically connected to the second phase The detector 1 3 3 0; the second low-pass filter 1 3 1 0 is electrically connected to the second mixer 1 3 0 5. Its job is to oscillate an output modulation signal based on a middle loaded data modulation signal and a frequency hopping reference frequency signal. Another work is to provide a pre-bias voltage to the multi-band voltage controlled oscillator 1 3 2 0 based on a pre-biased bias data. Because of the combination of the second phase-locked loop and the microcomputer to achieve one of the purposes of accelerating the frequency hopping speed, the modulation amount of the frequency can be fine-tuned and easily controlled and suppressed.

11210twf.ptd Page 10 1226755 V. Description of the invention (7) Benefits of clutter control. Here, the rate of the first phase-locked loop is firstly determined by the required bit with the feedback signal. The first 1 1 3 0 has a temperature that can make the vibration frequency. This C 0mpe η temperature system The communication technology oscillates the radio frequency type on the one hand and the time-frequency vibration provides the relevant stabilizer 1 2 1 0 of the feedback loop. Signal 1 2 3 5 Reference frequency output The signal has extremely stable oscillator output range. Generally the coefficient can be high. Temperature compensated sated C r number oscillation. There is no instrument. The temperature is lower than that of the signal, and the clock of the receiver is the most basic electronic device. To discuss the first phase-locked loop, please refer to Figure 2 for a schematic block diagram of a preferred embodiment. The phase characteristics of the oscillation frequency are determined, and the stability of the oscillation frequency is related to the change of frequency. In order to achieve the requirements of the present invention, the first phase is used in the first phase-locked loop, and its function is to compare the first reference frequency signal 1 2 3 0 and the first phase, and then output the first voltage control signal 1 2 4 0. The aforementioned signal 1 2 3 0 is obtained by dividing a temperature-compensated crystal oscillator number by a second frequency divider 1 2 0 5. The resonance characteristics and very high selectivity (Q value) of quartz crystals < produce very accurate and stable frequencies. Available crystals range from several kHz to hundreds of MHz and have resonance frequencies of 1 or 2 p p m / ° C. In order to achieve the high stability of the crystal oscillator 1130 (Temperature ystal Oscillator, TCXO), it is recommended to use a low-frequency device to achieve one of the purposes of high stability. In fact, the transmitter or receiver will be equipped with a temperature-compensated crystal-compensated crystal oscillator. In addition to allowing the frequency emitted by the transmitter to be maintained within the allowable range; temperature-compensated crystal oscillators can also be used. As the basis for the solution. The function of this book is to output and use various signal waveforms. The first voltage controlled oscillator 1 2 2 0 accepts the first phase

1 12101 w f. Ptd Page 11 1226755 V. Description of the invention (8) The first voltage control signal 1 2 4 0 output by the detector 1 2 1 0 oscillates with the input data signal and modulates an intermediate load. The modulation signal of the data is output to the second phase locked loop. The first frequency divider 1 2 2 5 is responsible for dividing the frequency-modulated signal carrying data in the middle and outputting the first frequency division signal 1 2 3 5 to the first phase detector 1 2 1 0. The second frequency divider 1 2 0 5 is controlled by a frequency division data, and divides the accurate reference frequency signal output by the temperature compensated crystal oscillator 1 1 3 0 to obtain the first reference frequency signal 1 2 3 0. Because the first phase-locked loop uses a highly accurate reference frequency signal for modulation, the accuracy of the data transmitted on the modulation signal output by the first phase-locked loop can be determined. Next, the second phase locked loop is discussed. Please refer to FIG. 3 for a schematic block diagram of a circuit of a first embodiment of the first phase locked loop. The second phase detector 1 3 3 0 is used to compare the IF modulated signal of the loaded data output by the second low-pass filter 1 3 1 0 with the third frequency divider 1 3 2 5 After the second divided signal 1 3 6 5 is output, an error signal is output to the loop filter 1315. The filter has the function of frequency selection, that is to say, it can pass signals in a specific frequency range and block signals outside the frequency range. Such a filter ideally has two frequency bands. Among them, the transmission gain of one frequency band is one, that is, the pass-band of the filter; the transmission gain of the other frequency band is zero, that is, the stop band (s t 0 p-b a n d) of the wavelet. Of course, the higher the wave filter selectivity (Q value), the smaller the harmonic component of the sine wave output, and the more accurate the filtered waveform. The loop filter we use in the second phase-locked loop uses a variable frequency wide loop filter because it requires high mobility.

11210twf.ptd Page 12 1226755 V. Description of the invention (9) It is used to respond to various frequency signals. Then, the loop filter 1 3 1 5 filters the error signal output by the second phase detector 1 3 3 0 to obtain The second voltage control signal is 1 3 6 0. The first mixer 1 3 4 5 mixes the output modulation signal of the multi-band voltage controlled oscillator 1 3 2 0 with the frequency hopping reference frequency signal to obtain a first mixed signal 1 3 7 0. Among them, the frequency hopping reference frequency signal mentioned above is a signal output by a frequency hopping synthesizer after receiving a control instruction for controlling frequency data. The first mixed frequency signal 1 3 7 0 obtained earlier is input to the first low-pass filter 1 3 4 0. After filtering and filtering, an output intermediate frequency signal is obtained. This intermediate frequency signal is passed through the third frequency divider 1 After the frequency division by 3 2 5, the aforementioned second frequency division signal 1 3 6 5 is obtained and input to the second phase detector 1 3 3 0. The second mixer 1 3 0 5 mixes the modulated data-carrying signal output from the first phase-locked loop with the second reference frequency signal 1 1 3 5 to obtain a second mixed signal 1 3 5 5. This second frequency mixing signal 1 3 5 5 is input to the second low-pass filter 1 3 1 0. After filtering by this filter, the IF modulation signal with the previously mentioned data is obtained, and the second phase detection is input. The device 1 3 3 0 performs a phase comparison operation. In addition, the second phase-locked loop also includes a digital / analog conversion pre-bias circuit 1 3 3 5. According to the pre-bias data, a pre-bias is provided to the multi-band voltage-controlled oscillator 1 3 2 0. Thereby, the output modulation signal is rapidly oscillated. Due to the combination of the second phase-locked loop and the microcomputer, the control voltage of the entire operating frequency can be adjusted in advance, and the obtained voltage can be stored in the main control board in advance. When the frequency hopping function is activated, the main control board will provide the required preset voltage according to the size of the operating frequency to achieve one of the purposes of accelerating the frequency lock speed. Here, the multi-band voltage controlled oscillator 1 3 2 0 is used as the output voltage controlled oscillator to make

11210iwf.ptd Page 13 1226755 V. Description of the invention (10) Use. Although the present invention has been disclosed as above with a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make some changes and retouch without departing from the spirit and scope of the present invention. The scope of protection of the invention shall be determined by the scope of the attached patent application.

112101 w f. Ptd Page 14 1226755 Brief description of the diagram The first diagram is a block diagram showing a fast frequency synthesis and modulation device, and the second diagram is a circuit block diagram showing a preferred embodiment of the first phase locked loop And FIG. 3 is a schematic circuit block diagram showing a preferred embodiment of the second phase locked loop. Description of graphical symbols: 1110 control signal decoder 1120 buffer amplifier 1125 frequency multiplier tuner 1130 temperature compensated crystal oscillator 1135 second reference frequency signal 1140 frequency hopping synthesizer 1145 transmitting module 1200 first phase-locked loop 1205 second division Frequency converter 12 10 first phase detector 1220 first voltage controlled oscillator 1225 first frequency divider 1230 first reference frequency signal 1235 first frequency division signal 1240 first voltage control signal 1300 second phase locked loop 1305 ____ Mixer

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11210twf.ptd Page 15 1226755 Brief description of the diagram 1 3 1 0: Second low-pass filter 1 3 1 5 ·· Loop filter 1 3 2 0: Multi-band voltage controlled oscillator 1 3 2 5: Third division Frequency converter 1 3 3 0: Second phase detector 1 3 3 5: Digital / analog conversion pre-bias circuit 1 3 4 0: First low-pass filter 1 3 4 5: First mixer 1 3 5 5: second frequency mixing signal 1 3 6 5: second frequency dividing signal 1 3 6 0 · second voltage control signal _ 1 3 7 0: first frequency mixing signal

ll210twf.ptd Page 16

Claims (1)

1226755 6. Scope of patent application 1. A fast-first phase-locked quasi-reference frequency signal number; and a first-controlled bias oscillator signal has been oscillated in the middle. 2. If the device, the second phase-locked load data is modulated, and the first phase-locked first phase and a first frequency-divided signal reference frequency signal in the scope of the first patent application are a first voltage control basis. The first voltage control has a tributary material with a first frequency-dividing voltage-controlled oscillation to the first 3. If a device, it accepts a divider, and uses the frequency-frequency data frequency synthesizing and modulation device in the frequency division application , Including: a loop for modulating and oscillating an intermediate loaded data modulation signal loop according to an input data signal and a precision, coupled to the first phase-locked loop for using the modulation signal and a The frequency-hopping reference frequency signal is used to oscillate the signal. The second phase-locked loop includes an output voltage two-phase-locked loop and a voltage-controlled oscillator according to a pre-adjusted bias voltage data to quickly oscillate the output modulation. The fast frequency synthesizing and modulating 1 circuit described in item 1, including: a detector for comparing a first reference frequency signal with a number, and outputting a first voltage control signal, wherein the first is based on the precise reference frequency signal And get An oscillator coupled to the first phase detector and used to signal and the input data signal to oscillate and modulate a modulation signal; and an oscillator coupled to the first phase detector and the first to Divide the frequency of the data modulation signal carried in the middle to obtain the number. The fast frequency synthesizing and modulating a phase-locked loop as described in the second item of interest range, and further includes a second frequency divider for controlling and dividing the precise reference frequency signal by 1 __ 11210twf.ptd page 17 1226755 6. The first reference frequency signal is obtained in the scope of patent application. 4. The fast frequency synthesizing and modulating device as described in item 2 of the scope of patent application, wherein the first voltage controlled oscillator is a voltage controlled quartz oscillator. 5. The fast frequency synthesizing and modulating device according to item 1 of the scope of patent application, wherein the output voltage-controlled oscillator quickly oscillates the output modulation signal according to a second voltage-control signal and the pre-set bias voltage, The second phase locked loop further includes: a second phase detector for comparing an intermediate frequency modulation signal of a loaded data with a second frequency division signal, and outputting an error signal, wherein the loaded data is The frequency modulation signal is obtained according to the intermediate data modulation signal; a loop filter is coupled to the second phase detector and the output voltage-controlled oscillator to filter the error signal to obtain The second voltage-controlled signal; a first mixer coupled to the output voltage-controlled oscillator for mixing the output modulation signal with the frequency-hopping reference frequency signal to obtain a first frequency-mixed signal A first low-pass filter coupled to the first mixer for filtering the first frequency mixing signal to obtain an output intermediate frequency data signal; and a third frequency divider coupled to The second phase detector and the first A low-pass filter is used to divide the output intermediate frequency data signal to obtain the second divided frequency signal. 6. The fast frequency synthesizing and modulating device as described in item 5 of the scope of patent application, wherein the second phase locked loop further comprises: 112101 w f. Ptd Page 18 1226755 VI. Patent application scope A second mixer for mixing the intermediate data modulation signal with a second reference frequency signal to obtain a second mixed signal And a second low-pass filter coupled to the second mixer for filtering the second mixed signal to obtain the IF modulated signal of the loaded data. 7. The fast frequency synthesizing and modulating device as described in item 6 of the scope of patent application, further comprising a frequency doubling tuner for doubling the precise reference frequency signal to obtain the second reference frequency signal. 8. The fast frequency synthesizing and modulating device as described in item 7 of the scope of patent application, further comprising a buffer amplifier whose input terminal is connected to the precise reference frequency signal and its output terminal is connected to the frequency doubling tuner. 9. The fast frequency synthesizing and modulating device as described in item 5 of the scope of the patent application, wherein the second phase-locked loop further includes a digital analog conversion pre-bias circuit for using the pre-bias bias data, The pre-bias is supplied to the output voltage controlled oscillator. 10. The fast frequency synthesizing and modulating device according to item 5 of the scope of patent application, wherein the loop filter is a variable frequency wide loop filter. 11. The fast frequency synthesizing and modulating device as described in item 5 of the scope of patent application, wherein the output voltage controlled oscillator is a multi-band voltage controlled oscillator. 1 2. The fast frequency synthesizing and modulating device as described in item 1 of the scope of patent application, which is coupled to a frequency hopping synthesizer, which is controlled by a control frequency data and outputs different frequency The frequency hopping reference frequency signal. 1 3. The fast frequency synthesizing and modulating device as described in item 1 of the scope of patent application, further comprising a high-stability oscillator to provide the accurate reference frequency 112101 w f. P t d p. 19 1226755 6. Application for patent coverage Rate signal. 14. The fast frequency synthesizing and modulating device according to item 13 of the scope of patent application, wherein the high-stability oscillator is a temperature-compensated crystal oscillator. 1 5. — A method for fast frequency synthesis and modulation, including the following steps: providing one of the accurate reference frequency signals with high stability; modulating and oscillating an intermediate load based on an input data signal and the accurate reference frequency signal Data modulation signal; providing a frequency hopping reference frequency signal and pre-bias bias data; providing a pre-bias voltage based on a pre-bias bias data; and 1 modulating a signal based on the intermediate loaded data and the hopping Frequency reference frequency signal to oscillate an output modulation signal, wherein the output modulation signal is quickly oscillated according to the pre-set bias voltage. 16. The method as described in item 15 of the scope of patent application, wherein the step of modulating and oscillating the intermediate data modulation signal includes the following steps: obtaining a first reference according to the precise reference frequency signal Frequency signal; frequency dividing the intermediate data modulation signal to obtain a first frequency division signal; detecting and comparing the first reference frequency signal and the first frequency division signal to output a first voltage control signal; And modulating the intermediate loaded data modulation signal according to the first voltage control signal and the input data signal 'Vi'. 11210twf.ptd Page 20 1226755 VI. Patent Application Range 1 7. If the patent application range is 1st, the first reference frequency signal is stepped to obtain the first reference frequency 1 8. If the patent application range is 1st, the output tuning The step of changing the signal includes the output modulation signal and the method described in the above 6 item is the accurate reference signal. The method described in item 5 includes the following steps: Frequency-hopping reference frequency signal, where the frequency signal is divided by 1 and the oscillation signal is mixed to obtain a first number; a number. The detection signal is changed according to the frequency, and the output 19 will be loaded with the frequency according to the output to the signal. A mixed frequency signal; the first mixed frequency signal is filtered and waved to obtain an output intermediate frequency data signal and the output intermediate frequency data signal is divided to obtain a second divided frequency signal based on the intermediate data modulation signal; An error signal is output from the loaded data; the error signal is filtered to modulate the signal based on the second voltage control signal; such as the step of the intermediate frequency modulation signal in the first patent application range, the intermediate loaded data is modulated Obtaining a second mixed frequency signal, the second mixed frequency signal filtered variable signal to obtain a loaded data intermediate frequency modulated signal, and the second divided frequency signal obtained a second voltage controlled signal; and the pre-biased voltage To quickly oscillate the steps obtained: the method described in the item 8 mixed with a second reference frequency signal, including the following steps; and to obtain the frequency modulation of the loaded data 112101 w f. P t d p. 21 1226755 1 12101 w f. P t d p. 22