TW200425646A - Super-regenerative radio frequency receiver and the data receiving method thereof - Google Patents

Abstract

A super-regenerative radio frequency receiver and the data receiving method thereof are provided. The super-regenerative radio frequency receiver includes an oscillator, a rectifier, a low pass filter, and a common mode feedback circuit. Wherein, the oscillator oscillates the oscillating output signal according to the radio frequency signal and the quench signal. The rectifier rectifies the rectifying signal according to the oscillating output signal. The low pass filter filters the rectifying signal to obtain the data signal. The common mode feedback circuit detects the common voltage of the data signal, and feeds back the common mode feedback signal to the rectifier; the rectifier receives the common mode feedback signal to adjust the rectifying signal. The present invention is to add the common mode feedback circuit and changes the rectifier to the integration-rectifier with feedback, thus the present invention can improve the sensitivity of the super-regenerative radio frequency receiver.

Description

200425646 V. Description of the invention (1) Technical field to which the invention belongs The present invention relates to a radio frequency receiver (Radio Frequency Receiver) and its data receiving method, and more particularly to a super self-excited radio frequency receiver, (Super -Regenerative Radio Frequency Receiver) and its data receiving method. Previously known On-Off Keying (οοκ) radio frequency receivers are commonly used in remote control applications, such as low-speed command control for toy cars or electronic devices = please, as shown in Figure 1, The waveform of the on / off key modulation signal is shown in the figure. The on / off key modulation signal is a signal with a carrier frequency adjusted by a binary code. For the transmitter, when the output two-carrier ί Ϊ low level U, the output ON / OFF key modulation signal is low level (no ϊίϊί); Λ when the Λ ”binary code is high, output Tong Gu ^, the signal is the 咼 level (fortunately, the carrier has a buccal rate receiver; the weak second depends on the distance between the receiver and the transmitter, and a strong or signal is received 4 = connected to the second The oscillator will be faster or slower depending on the received oscillation & then the faster or slower receiver can distinguish whether the signal input by the transmitter is 1 or 0. Block diagram of the circuit. From Figure 2, we can see that the super-self-excitation type = ^ 20 includes the oscillator 2G2, the capacitor 2Q4, the low-pass filter 206, 210, and the device (S1 1Cer) 208. Among them 'Low The pass filter 206 includes a resistor part and a function part 212. Next, each of the super-self-type radio frequency receiver 20 will be described.

C 1 200425646

V. Description of the invention (2) The vibrator 202 is used to oscillate an oscillating output signal according to a radio frequency signal and a Quench Signal ′. For the waveform diagrams of the RF signal, stop signal, and oscillating output signal in Figure 1, please refer to Figure 3. As can be seen from Figure 1, the rest signal is a tooth wave signal with an approximate frequency of 4,000 kHz, and when the RF signal is at a low level (that is, binary 0), the oscillating output signal will be slower. Oscillation; when the RF signal is at a high level (ie, binary 丨), the oscillation output signal will oscillate faster. Capacitor 204 is an AC coupling capacitor, which is used to divide the DC potential in the oscillating output signal and pass the AC signal in the oscillating output signal. The low-pass filter 206 is used to filter the AC signal in the oscillating output signal.

To obtain data signals. The shaper 2008 is used to shape the data signal and output the output data. However, in the ultra-self-excited RF receiver 20, the capacitance value of the capacitor 204 cannot be placed in the integrated circuit. Similarly, because the cut-off frequency of the low-pass filter 206 is very low, the resistance value of the resistor 2 1 0 and the capacitance value of the capacitor 212 will also be large, which will also make it impossible to place the resistor 21 0 and the capacitor 2 12. Integrated circuit. Therefore, the ultra-self-excited radio frequency receiver 20 has the disadvantage of being too bulky. Next, please refer to FIG. 4, which shows a circuit block diagram of another conventional super self-excited RF receiver. It can be seen from FIG. 4 that the ultra-self-excited RF receiver 40 includes a low noise amplifier (Low Noise Amplifier (LNA)) 402, a capping device 404, an envelope detector (Envelope Detector) 406, a low-pass filter 408, and shaping. 410, Automatic Gain Control (AGC) filter 412, voltage

11222twf.ptd Page 8 200425646 V. Description of the invention (3) To current converter 4 1 4, automatic gain control filter 4 1 6 and voltage to current converter 4 1 8. Among them, the automatic gain control filters 4 1 2 and 4 1 6 are composed of low-pass filters to obtain the energy level of the detection signal. In the ultra-self-excited radio frequency receiver 40, when the radio frequency signals have different levels, and the oscillation output signals of different levels are input to the envelope detector 4 06, the envelope detector 4 0 6 will output The detection signal of a large range changes, so that f will make the common-mode voltage of the data signal output by the low-pass filter 408 vary greatly, and make the low-pass filter 408 and the shaper 4 1 0 saturated. This will cause the output data of the shaper 4 10 to be wrong. In addition to RF signals at different levels, saturation of the low-pass filter 408 and shaper 410 will be caused, and changes in the process will make the saturation more severe. Therefore, the ultra-self-excited RF receiver 40 will have its sensitivity reduced due to different levels of RF signals and different processes. SUMMARY OF THE INVENTION In view of this, the present invention provides an ultra-self-excited radio frequency receiver and a data receiving method thereof. In the present invention, a common mode feedback circuit (Common Mode Feedback Circuit) is added, and a detector (Rectifier, also called a rectifier) is changed to an integral-detector with feedback, so the present invention can improve the ultra-self-excited RF Receiver sensitivity. To achieve the above and other objectives, the present invention proposes an ultra-self-excited radio frequency receiver. The ultra-self-excited RF receiver includes an oscillator, a detector, a low-pass filter, and a common-mode feedback circuit. Among them, the oscillator is used to oscillate an oscillating output signal according to the RF signal and the Quench Signal. The detector is coupled to the oscillator for outputting signals based on the oscillation

11222twf.ptd Page 9 200425646 V. Description of the invention (4), detection output Connect the detection signal to the low-pass filter and return the feedback signal to detect the differential detection current at the current. The current plus common mode feedback device is coupled to the detected signal and the entire detected signal to the amplifier and the data signal, and the low-pass filter is used to filter back to the method of the present invention. This data number. In this case, the RF signal will be detected according to the radio frequency. Next, the filter will be detected. The common mode of the filter will be adjusted. In order to obtain and return the feedback signal, the detection signal is better, including adding the circuit coupling, adding the pseudo-differential output level, real-pass filtering, common mode electrical coupling, and coupling feedback. A receiving method is also proposed. The receiving method signal and the data-receiving signal-based low-pass filter are coupled to the detector to obtain a data signal. The common mode feedback circuit is a coupler, which is used to detect the common mode signal of the data signal to the detector. The detector will receive the common mode signal. In the embodiment, the common-mode feedback signal is a common-mode feedback test current source, a current addition circuit, and a dummy current source. The reference current source is used to provide a reference electrical connection to the reference current source, and is used to output the reference current to the operating current. The virtual differential detection circuit is used to detect the oscillating output signal in order to obtain the detector's use of the operating current to adjust it. In the embodiment, the common-mode feedback circuit includes a comparator and an comparator. Among them, the comparison and amplifier are used to compare and amplify the voltage, and then output a comparison signal. Connect to compare and amplifier to compare signals. The data receiver of the ultra-self-excited RF receiver is used to receive the RF signal to obtain the data signal. Firstly, a rest signal is provided. Then, the signal is oscillated, and the oscillating output signal is oscillated. Connect the common mode voltage and feedback the common mode feedback signal. Output signal

11222twf.ptd Page 10 200425646 V. Description of the invention (5) Common mode feedback signal to adjust the detection signal. The detection signal is then filtered to obtain a data signal. In summary, the present invention is to prevent the detector, low-pass filter, and shaper from being saturated by adding a common-mode feedback circuit and changing the detector to an integrating-detector with feedback. Therefore, the output signal output by the shaper will not generate errors, so the present invention can improve the sensitivity of the ultra-self-excited radio frequency receiver. 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 conjunction with the accompanying drawings, and described in detail as follows: For an implementation, please refer to FIG. 5, which is a drawing Shown is a circuit block diagram of a super self-excited radio frequency receiver according to a preferred embodiment of the present invention. It can be seen from FIG. 5 that the ultra-self-excited radio frequency receiver 50 includes a sawtooth wave generator (Saw Generator) 502, a vibrator 504, a detector (Rectifier), 506, a low-pass chirper 508, and a common mode Comm on Mode Feedback Circuit (CMFB) 510 and Slicer 5 1 2. Next, the function of each part of the ultra-self-excited RF receiver 50 will be explained. The sawtooth wave generator 502 is used to generate a rest signal (Q u e n c h S i gn a 1). In this preferred embodiment, the rest signal is the rest current signal Iq, which is approximately a sawtooth wave signal having a frequency of 400 kHz. The oscillator 504 is coupled to the sawtooth wave generator 502, and is configured to oscillate an oscillating output signal Vosc according to the radio frequency signal RF and the stop signal Iq. oscillation

11222twf.ptd Page 11 200425646 V. Description of the invention (6) The device 5 0 4 will make the oscillation output signal Vosc oscillate faster or slower according to the strength of the radio frequency signal RF. Among them, the oscillation output signal V 0 s c is a differential signal, including the oscillation output signal Voscl and the oscillation output signal Vosc2. The detector 506 is connected to the oscillator 504, and is used for detecting the detection signal V r e ct according to the oscillation output signal V 0 s c. In each period of the rest signal, the detector 506 integrates the oscillating output signal Vosc, and detects the detection signal V r e c t. The low-pass filter 508 is coupled to the detector 506 for low-pass filtering the detection signal V r e c t to remove noise and the like contained in the detection signal V r e c t to obtain a data signal VLPF. The common mode feedback circuit 5 1 0 is coupled to the low-pass filter 5 0 8, the detector 5 0 6, and the shaper 5 1 2 to detect the common mode voltage of the data signal VLPF and feedback the common mode feedback. The signal is sent to the detector 506. The detector 506 will receive the common-mode feedback signal to adjust the detection signal Vrect. In this preferred embodiment, the common-mode feedback signal is the common-mode feedback current ICMFB. > The shaper 5 1 2 is coupled to the low-pass filter 508 for shaping the data signal VLPF and outputting the output data of digital data such as a binary code. It can be known from the foregoing that the biggest difference between the ultra-excited RF receiver 50 of the present invention and the conventional ultra-excited RF receiver lies in the detector 506 and the common-mode feedback circuit 5 1 0. The detector 506 and the common-mode feedback circuit 5 10 will be described in detail below. Please refer to FIG. 6, which shows a circuit block diagram of a detector in an ultra-self-excited radio frequency receiver according to a preferred embodiment of the present invention. As can be seen from Figure 7, the detector 5 0 6. includes a reference current source 6 0 2 and a current addition circuit.

1I222twf.ptd Page 12 200425646 V. Description of the Invention (7) 604 and Virtual Differential Detector (Pseudo Differential R e c t i f i e r) 6 0 6. The reference current source 602 is used to provide a reference current Γ ". The current addition circuit 604 is coupled to the reference current source 602 to add the reference current Iref to the common-mode feedback current ICMFB, and Output operating current (Irei + ICMFB). The virtual differential detector 606 is transferred to the current addition circuit 604 to detect the oscillating output signal Vo sc to obtain the detection signal V rect. The virtual differential detector The 6 0 6 series uses the magnitude of the operating current (I μ + ICMFB) to adjust the output level of the detection signal Vrect. For more clarity, please refer to FIG. 7, which illustrates the method according to the present invention. A detailed circuit diagram of a detector in a super self-excited RF receiver of a preferred embodiment. As can be seen from FIG. 7, the reference current source 60 is composed of a current mirror for the reference current Iref. 6 0 4 will add the reference current Irei and the common-mode feedback current ICMFB, and output the operating current (pef + ICMFB) to the virtual differential detector 606. The virtual differential detector 606 includes a transistor 7 0 2, an electric Crystal 7 04, transistor 7 0 6, and electricity 7 0 8. Among them, the first source / drain of the transistor 7 0 2 is coupled to the first source / drain of the transistor 70 4, the first source / drain of the transistor 7 0 6, and the capacitor 7 0 One terminal of 8, the operating current (Iref + ICMFB), and the detection signal Vrect. The second source / drain of transistor 702 and the second source / drain of transistor 704 are coupled to ground. The gate of transistor 7 0 2 The pole system is coupled to the oscillation output signal V 0sc 1. The gate of the transistor 7 〇4 is coupled to the oscillation output signal V 0sc 2. The gate of the transistor 7 06 is connected to the stop control signal. The second source / drain of the transistor 706 and the other end of the capacitor 708 are coupled to the supply voltage VDDA. In addition, the discharge circuit 710 is used to prevent the components in the virtual differential detector 606 from being saturated.

11222twf.ptd Page 13 200425646 V. Description of the invention (8) As can be seen from the above, the detector 506 is a current type integrating rectifier. In addition, the virtual differential detector 606 increases the gain of the detector 506. Furthermore, since the capacitor 708 is composed of an M 0 S capacitor, external components can be reduced. In addition, because the detector 506 does not saturate, it is possible to prevent the low-pass filter 508 and the shaper 5 1 2 from being saturated, so that the output data output by the shaper 5 1 2 will not be erroneous. Situation, so sensitivity can be improved. Next, please refer to FIG. 8, which shows a circuit block diagram of a common mode feedback circuit in an ultra-self-excited radio frequency receiver according to a preferred embodiment of the present invention. It can be seen from FIG. 8 that the common-mode feedback circuit 510 includes a comparison and amplifier 802, a feedback low-pass filter 804, and a voltage-to-current converter 806. The comparison and amplifier 802 is operated in a sub-threshold mode, which compares and amplifies the data signal VLPF with a reference common-mode voltage VCM and outputs a comparison signal. The feedback low-pass filter 804 is coupled to the comparison and amplifier 802 for filtering the comparison signal to obtain a feedback signal. The voltage-to-current converter 806 is coupled to the feedback low-pass filter 804 to convert the feedback signal into a common-mode feedback current ICMFB. For the sake of clarity, please refer to FIG. 9 next, which shows a detailed circuit diagram of a common mode feedback circuit in an ultra-self-excited RF receiver according to a preferred embodiment of the present invention. As can be seen from FIG. 9, the comparison and amplifier 802 includes a transistor 90 2 and a transistor 104 that are both operated in a subcritical mode. Among them, the second source / drain of the transistor 9 0 2 is coupled to the second source / drain of the NMOS 9 0 4. The first source / drain of the transistor 9 0 2 is coupled to one end of the current mirror 9 0 6. The gate of the transistor 9 0 2 is coupled to the data signal VLPF. Transistor

11222twf.ptd Page 14 200425646

The first source / drain system of body 904 is coupled to the other of the current mirror 906. The gate system of body 904 is coupled to the reference common mode voltage. From the above, it can be seen from the above that, since the amplifier 8 0 2 series is operated in a subcritical mode, so the capacitor 9 in the low-pass filter 8 0 4 requires only a small capacitance value, so the capacitor 9 0 8 Placed in the integrated circuit. In addition, a total of 1 ohm circuit 5 1 0 is used to define the operating point of the detection signal ν r e c t, so the gain of the detector 506 can be set higher, and the detector 506 will not produce saturation.

Next, please refer to FIG. 10, which shows a waveform diagram of an ultra-self-excited RF receiver before using a common-mode feedback circuit according to a preferred embodiment of the present invention. The following will describe the data receiving method of the ultra-self-excited radio frequency receiver 50 before using the common mode feedback circuit 5 10 according to FIG. 10. First, the sawtooth wave generator 502 will generate a rest signal Iq. As shown in Figure 10, the rest signal Iq is a sawtooth signal with a frequency of approximately 400 kHz. Then, the oscillator 504 will oscillate the oscillating output signal Vosc according to the radio frequency signal RF and the stop signal Iq. It can be seen from FIG. 10 that when the RF signal RF is at a low level (that is, binary 0), the oscillation output signal Vosc oscillates slowly; and when the RF signal RF is at a high level (that is, two Carrying 1), the oscillation output signal Vosc oscillates faster. Next, the detector 506 will output the signal Vosc based on the oscillation and detect the signal Vrect out of the detection signal. After that, the low-pass filter 508 will filter the detection signal Vrect to obtain the data signal VLPF. Finally, the shaper 5 1 2 will shape the data signal VLPF and output the output data. It can be seen from FIG. 10 that the change of the radio frequency signal RF will cause a large change in the detection signal Vrect and the data signal VLPF, which will cause the data signal V

11222twf.ptd Page 15 200425646 V. Description of the invention The common mode voltage of GO) varies greatly. In this way, the detector 506, the low-pass filter 508, and the shaper 5 1 2 will be saturated, and the output data output by the shaper 5 1 2 will be wrong. Next, please refer to FIG. 11, which shows a waveform diagram of an ultra-self-excited RF receiver after using a common mode feedback circuit according to a preferred embodiment of the present invention. The following will describe the data receiving method of the ultra-self-excited RF receiver 50 after using the common mode feedback circuit 5 10 according to FIG. 11. The first 'sawtooth wave generator 5 0 2 will generate a rest signal I q. Then, the oscillator 5 will evaluate and stop the vibration signal Iq according to the radio frequency signal, and oscillate the oscillation output signal V0 s c. Next, the common mode feedback circuit 5 10 detects the common mode voltage of the data signal ^ LPF, and returns the common mode feedback signal ICMFB. Next, the detector 506 will output the signal Vosc according to the oscillation, and detect the detection signal Vrec t, and

The common-mode voltage of the detection signal Vrect is adjusted based on the common-mode feedback signal ICMFB. After that, the low-pass filter 508 filters the detection signal vrect to obtain the data signal VLPP. Finally, the shaper 5 1 2 will shape the data signal VLPF and output the output data. As can be seen from Figure 11, since the common mode voltage of the detection signal Vrect is adjusted by the common mode feedback signal IeMFB, the change of the common mode voltage of the detection signal Vr ec t is quite small, so the common mode voltage of the data signal vlpf The change is also quite small, so that the common-mode voltage of the data signal Vlpf remains unchanged. Therefore, after the common mode feedback circuit 5 1 0 is used, the detector 506, the low-pass wave 508, and the shaper 5 1 2 will not be saturated, and the output from the shaper 512 will be > The material is correct, so the ultra-self-excited RF receiver 50 can improve the sensitivity. Next, please refer to FIG. 12, which shows a preferred embodiment according to the present invention.

11222twf.ptd Page 16 200425646 V. Description of the Invention (π) The actual analog waveform diagram of the ultra-self-excited RF receiver of the embodiment. It can be seen from Figure 13 that the change of the data signal VLPF is quite small, so the common mode voltage of the data signal VLPF remains unchanged, so that the output data is correct. In summary, the present invention is to prevent the detector, low-pass filter, and shaper from being saturated by adding a common-mode feedback circuit and changing the detector to an integrating-detector with feedback. Therefore, the output signal output by the shaper will not generate errors, so the present invention can improve the sensitivity of the ultra-self-excited radio frequency receiver. Although the present invention has been disclosed above with a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can make various modifications and retouches 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.

1I222twf.ptd Page 17 200425646 Brief description of the diagram Figure 1 shows the waveform diagram of the ON / OFF key modulation signal; Figure 2 shows the circuit block diagram of a conventional ultra-self-excited RF receiver; Figure 3 can't draw the waveform diagram of the RF signal, break signal, and oscillating output signal in Figure 1. Figure 4 shows a block diagram of another conventional super-self-excited RF receiver; FIG. 5 shows a circuit block diagram of a super self-excited radio frequency receiver according to a preferred embodiment of the present invention; FIG. 6 shows a super self-excited radio frequency receiver according to a preferred embodiment of the present invention A block circuit diagram of a detector in a receiver; FIG. 7 shows a detailed circuit diagram of a detector in an ultra-self-excited radio frequency receiver according to a preferred embodiment of the present invention; FIG. 8 shows a circuit diagram according to the present invention. A circuit block diagram of a common-mode feedback circuit in an ultra-self-excited RF receiver according to a preferred embodiment of the present invention; FIG. 9 illustrates an ultra-self-excited RF receiver according to a preferred embodiment of the present invention. Detailed circuit diagram of the common mode feedback circuit; Figure 10 shows According to a preferred embodiment of the present invention, before using a common-mode feedback circuit, a waveform diagram of an ultra-self-excited radio frequency receiver; FIG. 11 shows a preferred embodiment of the present invention. After the mode feedback circuit, the waveform diagram of the ultra-self-excited RF receiver; and FIG. 12 shows the actual analog waveform diagram of the ultra-self-excited RF receiver according to a preferred embodiment of the present invention. Schematic description:

11222twf.ptd Page 18 200425646 Simple explanation of the diagram 20 ~ 40 5 0: Ultra-self-excited RF receiver 202, 404, 504: Oscillator 204, 21 2, 708 908: Capacitors 206, 408, 508 • Low-pass Filters 208, 41 0, 51 2 * Shaper 21 0 Resistance 402 Low noise amplifier 406 Envelope detector 412 416: Automatic gain control filters 414, '418, 806: Voltage-to-current conversion 502 Ramp generator 506 Detection 510 Common mode feedback circuit 602 Reference current source 604 Current addition circuit 606 Virtual differential detector 7 02, • 704, 706 902, 9 0 4 ·· Transistor 710 Discharge circuit 802 Comparison with amplifier 804 feedback lowpass Filter 906 current mirror _

II222twf.ptd Page 19

Claims (1)

200425646 KiQ 200425646 6. Scope of patent application 4: The ultra-self-excited RF receiver described in item 2 of the scope of patent application, wherein the oscillating output signal includes a differential first oscillating output signal and a second oscillating output signal, The virtual differential detector includes: a first transistor, a first source / drain of the first transistor is coupled to the operating current and the detection signal to the first oscillation output signal, and is coupled To the ground; a second transistor, the second to the operating current and the detection signal to the second oscillating output signal, and coupled to the ground and the first transistor to a third transistor, the third to The operating current, the detection signal electrode, and the second gate of the second transistor are coupled to a stop control signal / drain system and coupled to a supply voltage; and the gate of the first transistor is coupled A first source / drain system connected to the second source / drain transistor of the first transistor, and a gate system of the second transistor coupled to the second source / drain of the second transistor. The second source / drain; the first source / drain of the transistor is coupled The first source / sink source / sink of the first transistor, the number of the third transistor, and the second source of the second transistor and a capacitor have a first end and a second end, The first terminal is coupled to the stop control signal, and the second terminal is coupled to the operating current, the detection signal, the first source / drain of the first transistor, and the second transistor. The first source / drain of the third transistor and the first source / drain of the third transistor. The ultra-self-excited RF receiver according to item 1 of the patent application scope, wherein the common-mode feedback circuit includes : • A comparison and amplifier to compare the data signal with a reference common mode 11222iwf.ptd Page 21 200425646 6. The patent application range is compared and amplified to output a comparison signal; and a feedback low-pass filter is coupled to the comparison and amplifier to filter the comparison signal to obtain A feedback signal. 6 · The ultra-self-excited RF receiver according to item 5 of the patent application scope, wherein the common mode feedback signal is a common mode feedback current, and the common mode feedback circuit further includes a voltage-to-current converter Is coupled to the feedback low-pass filter to convert the feedback signal into the common-mode feedback current. 7. The ultra-self-excited RF receiver according to item 5 of the patent application scope, wherein the comparison and amplifier are operated in a critical mode. 8. The ultra-self-excited radio frequency receiver according to item 5 of the patent application scope, wherein the comparison and amplifier includes: 丨 B a first transistor that operates in the subcritical mode, and the first of the first transistor A source / drain is coupled to one end of a current mirror, and a gate of the first transistor is coupled to the data signal; and a second transistor is operated in the subcritical mode, the first transistor The first source / drain is coupled to the other end of the current mirror and the comparison signal, the gate of the second transistor is coupled to the reference common mode voltage, and the second source of the second transistor is The / drain is coupled to the second source / drain of the first transistor. 9. The ultra-self-excited RF receiver described in item 1 of the scope of patent application, further comprising a sawtooth wave generator coupled to the oscillator for generating the rest signal. _ 10. The ultra-self-excited RF receiver described in item 1 of the patent application scope further includes a shaper coupled to the low-pass filter to shape the I1222twf.ptd Page 22 200425646 6. Patent application scope Data signal and output an output data. Device 1 1 · Ultra-self-excited RF receiver as described in item 1 of the patent application range, wherein the common mode feedback signal is a common mode feedback current. Device 1 2. The ultra-self-excited RF receiver as described in item 1 of the patent application range, wherein the rest signal is a rest current signal. 1 3 · —A data receiving method for an ultra-self-excited radio frequency receiver for receiving a radio frequency signal to obtain a data signal. The data receiving method includes the following steps: providing a break signal; according to the radio frequency signal and the break signal The vibration signal oscillates an oscillating output signal; detects a common-mode voltage of the data signal and returns a common-mode feedback signal; based on the oscillating output signal, a detection signal is detected, and according to the common-mode feedback signal, Adjusting the detection signal; and filtering the detection signal to obtain the data signal. 14. The data receiving method described in item 13 of the scope of patent application, wherein the common mode feedback signal is a common mode feedback current, and the step of obtaining the detection signal includes the following steps: providing a reference current; Adding the reference current to the common-core feedback current to output an interpolated current; and detecting the oscillating output signal to obtain the detection signal, and using the magnitude of the operating current to adjust the output voltage of the detection signal level. country_ 11222twf.ptd Page 23 200425646 VI. Patent application scope 15 · The data receiving method as described in item 13 of the patent application scope, wherein the common mode voltage of the data signal is detected and the common mode feedback signal is returned. The steps include the following steps: providing a reference common-mode voltage; comparing and amplifying the data signal with the reference common-mode voltage to output a comparison signal; and crossing the comparison signal to obtain a feedback signal. 16. The data receiving method as described in item 15 of the scope of patent application, wherein the common mode feedback signal is a common mode feedback current, and the common mode voltage of the data signal is detected and the common mode feedback is feedbacked. The step of granting the signal further includes: converting the feedback signal into the common-mode feedback current. 11222twf.ptd Page 24