CN104378086B - A kind of radio frequency chip, radio circuit and electronic equipment - Google Patents

Abstract

The present invention relates to field of communication technology, a kind of radio frequency chip, radio circuit and electronic equipment are disclosed, to solve the higher technical problem of power supply disturbance in the prior art.The radio frequency chip, including：Power pin receives the electric energy that power supply is provided by the power pin；The adjustable tunable filter circuit of frequency filtering, the first end of the tunable filter circuit are connected with the power pin, and the second end of the tunable filter circuit is connected to the control terminal controlled the tunable filter circuit；Wherein, when being powered to the radio frequency chip by the power pin, interference signal caused by the power supply is filtered by the tunable filter circuit, to filter out the interference signal at least partially.Since tunable filter circuit is set to inside radio frequency chip, reduced apart from radio frequency chip, so reached the technique effect for reducing power supply disturbance.

Description

A kind of radio frequency chip, radio circuit and electronic equipment

Technical field

The present invention relates to field of communication technology, more particularly to a kind of radio frequency chip, radio circuit and electronic equipment.

Background technology

With the continuous development of science and technology, electronic technology has also obtained development at full speed, and then also produces increasingly More electronic equipments, such as：Mobile phone, tablet computer, laptop etc..Function possessed by these electronic equipments is increasingly It is powerful, have become a part indispensable in people's life.

And many electronic equipments all have communication function, and then can receive or transmission data, in order to realize communication work( Can, radio frequency chip is both provided in these electronic equipments, and power supply can generate radio frequency chip interference, so need to pass through Setting filter circuit interferes to reduce.

As shown in Figure 1, for the connection relation of radio frequency chip 10 in the prior art, filter circuit 11 and power supply 12 Schematic diagram, wherein filter circuit 11 is set to outside radio frequency chip 10, is connected with the power pin 10a of the radio frequency chip 10, The power supply 12 is connected by the filter circuit 11 with the radio frequency chip 10, and then is dropped by the filter circuit 11 Interference of the low power supply 12 to the radio frequency chip 10.

Wherein, as shown in Fig. 2, the filter circuit 11, specifically includes：

First capacitance 20, including the first pin 20a and second pin 20b, the first pin 20a ground connection；

First inductance 21, including third pin 21a and the 4th pin 21b, the third pin 21a and the second pin For 20b there are the first intersection point 23, first intersection point 23 is connected to the power pin 10a, and the 4th pin 21b is connected to institute State the RF output end of radio frequency chip.

In order to ensure that the filter circuit 11 reaches best filter effect, needed in the prior art to the first capacitance or One inductance is replaced manually, such as the first inductance is multiple using 6.8nH, 8.2nH, 12nH, 15nH, 22nH, 33nH etc. Inductance is tested, and then determines the best value of the filter effect of filter circuit 11.

Present inventor has found at least to have the following technical problems in the prior art：

Since in the prior art, filter circuit is set to outside radio frequency chip, and radio frequency chip and filter circuit it Between need that other circuits are preferentially arranged, such as：Radio frequency cabling, biasing circuit, cycle of phase-locked loop filter circuit etc., so cause Filter circuit apart from radio frequency chip farther out, so cause reduce power supply disturbance effect it is poor, so as to cause existing in the prior art The technical issues of higher power supply disturbance；Also, due in the prior art, in order to make the filter effect of filter circuit most It is good, it needs repeatedly frequently to replace the first capacitance and the first inductance, and then there is technical problem inconvenient for operation, also hold Easily cause electronic device loss.

Invention content

A kind of radio frequency chip of offer of the embodiment of the present invention, radio circuit and electronic equipment are deposited in the prior art for solving The higher power supply disturbance the technical issues of.

A kind of radio frequency chip is provided according to the first aspect of the invention, including：Power pin is connect by the power pin Receive the electric energy that power supply is provided；The adjustable tunable filter circuit of frequency filtering, the first end of the tunable filter circuit with The power pin is connected, and the second end of the tunable filter circuit is connected to the control controlled the tunable filter circuit End processed；Wherein, when being powered to the radio frequency chip by the power pin, by the tunable filter circuit to the confession Interference signal caused by power supply is filtered, to filter out at least part interference signal.

With reference to first aspect, in the first possible implementation, the tunable filter circuit, specifically includes：Capacitance It is worth the first controllable impedance of the first tunable capacitor and inductance value in the first inductance value range in the first capacitance value range.

The possible realization method of with reference to first aspect the first, in second of possible realization method, described first Tunable capacitor includes the first pin and second pin, and first controllable impedance includes third pin and the 4th pin；Described One pin is connected with power pin；The second pin is connected with the third pin；The 4th pin ground connection.

The possible realization method of with reference to first aspect the first, in the third possible realization method, described first Any capacitance in capacitance value range is less than the first default threshold capacitance.

The possible realization method of with reference to first aspect the first, in the 4th kind of possible realization method, described first Any inductance value in inductance value range is less than the first default threshold inductance value.

Any one possible realization method in first to fourth kind of possible realization method with reference to first aspect, In five kinds of possible realization methods, the radio frequency chip further includes：Register, for storing working as first tunable capacitor The current inductance value of preceding capacitance and/or first controllable impedance.

A kind of radio circuit is provided according to the second aspect of the invention, including：According to the first aspect of the invention or first Radio frequency chip provided in the first to five kind of possible realization method of aspect；Baseband processor is connected to the radio frequency core Piece, for sending first control signal, the filtering to tunable filter circuit to the tunable filter circuit by the control terminal Frequency is adjusted.

It is in the first possible implementation, described when the radio frequency chip includes register in conjunction with second aspect Radio circuit further includes：Bus is configured, the baseband processor is connected to by the register by the configuration bus, is used In the first control signal caused by the baseband processor is transmitted to the register, with to the frequency filtering into Row is adjusted.

In conjunction with second aspect, in second of possible realization method, the radio circuit further includes：Radio-frequency front-end, and The radio frequency chip connection.

A kind of electronic equipment is provided according to the third aspect of the invention we, including：Shell；Processor is set to the shell It is internal；According to any one possible realization side in the first to two kind of possible realization method of second aspect or second aspect The radio circuit that formula is provided is set to the case surface or inside, is connected with the processor, for sending the place Manage the first signal of device output.

One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages：

(1) since in the embodiment of the present application, tunable filter circuit being set to inside radio frequency chip, so adjustable filtering Power pin distance of the circuit apart from radio frequency chip is closer, so filter effect is more apparent, thus it is dry to have reached reduction power supply The technique effect disturbed；

Further, since the filter circuit being filtered to interference signal caused by power supply is that frequency filtering can The tunable filter circuit of tune, so frequently filter circuit need not be replaced, it also can be to the frequency filtering of filter circuit It is adjusted, and then filter circuit is made to reach best filter effect, due to need not frequently replace tunable filter circuit, so With the more convenient technique effect of operation.

(2) since the capacitance for the first tunable capacitor in embodiments of the present invention, forming tunable filter circuit is adjustable, shape Inductance value at the first controllable impedance of tunable filter circuit is also adjustable, so, directly by directly adjusting the first tunable capacitor Capacitance or the inductance value of the first controllable impedance so that tunable filter circuit is reached best filter effect, without frequently more The first adjustable electric perhaps the first controllable impedance is changed, so reached the more convenient technique effect of operation；And prevent electronics Device is because frequently replace caused loss.

(3) since in the embodiment of the present application, any capacitance in the first capacitance value range is less than the first default threshold electricity Capacitance, and then make the small volume of the first tunable capacitor, and in the prior art, the volume of radio frequency chip is typically small, so drop The low technical difficulty that first tunable capacitor is set to radio frequency chip.

(4) since in the embodiment of the present application, any inductance value in the first inductance value range is less than the first default threshold electricity Inductance value, and then make the small volume of the first controllable impedance, to reduce the skill that the first controllable impedance is set to radio frequency chip Art difficulty.

(5) since in the embodiment of the present application, the radio frequency chip further includes having register, the register is stored with The current inductance value of the capacitance present value of one tunable capacitor and/or first controllable impedance, so, it can directly post described Capacitance present value or current inductance value in storage are modified, and then the capacitance of the first tunable capacitor are adjusted or The inductance value of one controllable impedance is adjusted, so reached more square to the adjusting of the first adjustable electric perhaps the first controllable impedance Just technique effect, and then more convenient can adjust tunable filter circuit to optimum filtering effect.

Description of the drawings

Fig. 1 is the connection relationship diagram of radio frequency chip, tunable filter circuit and power supply in the prior art；

Fig. 2 is the structure chart of tunable filter circuit in the prior art；

Fig. 3 is the structure chart of radio frequency chip in the embodiment of the present application；

Fig. 4 is the first structure chart of tunable filter circuit in the embodiment of the present application radio frequency chip；

Fig. 5 is second of structure chart of tunable filter circuit in the embodiment of the present application radio frequency chip；

Fig. 6 is the circuit diagram controlled by the first tunable capacitor of register pair；

Fig. 7 is the structure chart of radio circuit in the embodiment of the present application；

Fig. 8 is the structure chart of electronic equipment in the embodiment of the present application.

Specific implementation mode

A kind of radio frequency chip of offer of the embodiment of the present invention, radio circuit and electronic equipment drop in the prior art for solving The technical problem of the effect difference of low power supply disturbance.

In order to solve the above technical problems, general thought is as follows for technical solution in the embodiment of the present application：

A kind of radio frequency chip is provided, including：Power pin receives the electricity that power supply is provided by the power pin Energy；The adjustable tunable filter circuit of frequency filtering, the first end of the tunable filter circuit are connected with the power pin, filter that this is adjustable The second end of wave circuit is connected to the control terminal controlled the tunable filter circuit；Wherein, it is given by the power pin When the radio frequency chip is powered, interference signal caused by the power supply is filtered by the tunable filter circuit, with mistake Filter the interference signal at least partially.

Since in the above scheme, tunable filter circuit being set to inside radio frequency chip, so tunable filter circuit away from It is closer with a distance from the power pin of radio frequency chip, so filter effect is more apparent, thus improve the skill for reducing power supply disturbance Art effect；

Further, since the filter circuit being filtered to interference signal caused by power supply is adjustable filtered electrical Road can also be adjusted the filtering parameter of filter circuit, and then make so need not frequently be replaced to filter circuit Filter circuit reaches best filter effect, due to need not frequently replace tunable filter circuit, so it is more square with operating Just technique effect.In a first aspect, the embodiment of the present application provides a kind of radio frequency chip, referring to FIG. 3, the radio frequency chip specifically wraps It includes such as lower structure：

Power pin 30 receives the electric energy that power supply is provided by the power pin 30；

The adjustable tunable filter circuit 31 of frequency filtering, the first end 33 of the tunable filter circuit 31 and the power pin 30 It is connected, the second end 34 of the tunable filter circuit is connected to the control terminal controlled the tunable filter circuit；

Wherein, when being powered to the radio frequency chip by the power pin 30, by the tunable filter circuit 31 to the confession Interference signal caused by power supply is filtered, to filter out the interference signal at least partially.

Embodiment as a further preference, please refers to Fig.4 and Fig. 5, wherein Fig. 4 and Fig. 5 are respectively tunable filter circuit 31 two different structure charts, the tunable filter circuit 31 specifically include：Capacitance in the first capacitance value range first The the first controllable impedance 31b of tunable capacitor 31a and inductance value in the first inductance value range.Wherein, Fig. 4 is the first adjustable electric Hold the 31a structure charts in parallel with the first controllable impedance 31b；Fig. 5 is that the first tunable capacitor 31a connects with the first controllable impedance 31b Structure chart.

As seen from the above description, the capacitance for forming the first tunable capacitor of tunable filter circuit is adjustable, forms adjustable filter The inductance value of first controllable impedance of wave circuit is also adjustable, so, the direct capacitance by directly adjusting the first tunable capacitor Or first the inductance value of controllable impedance so that tunable filter circuit is reached best filter effect, can without frequently replacing first Capacitance or the first controllable impedance are adjusted, so reached the more convenient technique effect of operation；And prevent electronic device because Loss caused by frequently replacing.

In specific implementation process, which can have a variety of structures, and be described below two kinds therein, when So, in specific implementation process, following two situations are not limited to.

The first, referring to FIG. 4, first tunable capacitor 31a includes the first pin 40 and second pin 41, this first can It includes third pin 42 and the 4th pin 43 to adjust inductance 31b；First pin 40 is grounded；The second pin 41 and the third pin 42 there are the first intersection points 44；4th pin 43 is connected to the RF output end of the radio frequency chip.

Second, referring to FIG. 5, first tunable capacitor 31a includes the 5th pin 50 and the 6th pin 51, this first can It includes the 7th pin 52 and the 8th pin 53, the 5th pin 50 ground connection to adjust inductance 31b；6th pin 51 is connected to the 7th Pin 52；8th pin 53 is connected to the power pin 30.

In addition, in specific implementation process, the first capacitance value range of first tunable capacitor 31a can be arbitrary model It encloses, such as：0pf~100pf, 0pf~50pf etc. are not restricted this embodiment of the present application；Similarly, first controllable impedance The first inductance value range of 31b may be any range, for example,：0~15nH, 0~33nH etc. implement this application Example is not restricted.It is needing to be adjusted the filtering parameter of the tunable filter circuit 31, so that the tunable filter circuit reaches When best filter effect, it is only necessary to which capacitance present value and the first controllable impedance 31b to first tunable capacitor 31a are worked as Preceding inductance value is adjusted, without the first tunable capacitor 31a and the first adjustable electric to forming the tunable filter circuit 31 Sense 31b is replaced, so reached the more convenient technique effect of operation；And electronic device is prevented because frequently replacing Caused loss.

In specific implementation process, since the volume of radio frequency chip is all smaller, so in order to reduce the first tunable capacitor 31a It is set to the technical difficulty of the radio frequency chip, any capacitance in first capacitance value range is less than the first default threshold capacitance When being worth, that is, ensureing the first tunable capacitor 31a being set to the radio frequency chip, the normal work of the radio frequency chip will not be interfered Make.

In specific implementation process, which can be arbitrary capacitance, such as：50pf、90pf、 120pf etc., wherein as a preferred embodiment, which is 100pf, in the first default threshold electricity When capacitance is 100pf, it can either guarantee first tunable capacitor 31a being set to the radio frequency chip, and can ensure this The capacitance that first tunable capacitor 31a has adjustable extent wide as possible, has range wide as possible to make tunable filter circuit 31 also Filtering parameter, to enable tunable filter circuit 31 to reach preferable filter effect.

Similarly, any inductance value in first inductance value range is less than the first default threshold inductance value, also for guarantor The small volume shared by first controllable impedance 31b is demonstrate,proved, and then reduces the skill that the first controllable impedance 31b is set to the radio frequency chip Art difficulty.

In specific implementation process, which equally can be arbitrary value, such as：15nH、30nH、 40nH etc. is not restricted this embodiment of the present application.As a preferred embodiment, which is 33nH can either make first controllable impedance 31b's to be sized to be set to the radio frequency chip, while again in this case Enable first controllable impedance 31b that there is large range of inductance value, to make the parameter selection model of tunable filter circuit 31 It encloses relatively extensively, to enable tunable filter circuit 31 to obtain preferable filter effect as possible.

Further, please continue to refer to Fig. 4 and Fig. 5, which further includes：

Register 60 is connected to the second end 34, capacitance present value for storing first tunable capacitor 31a and/or The current inductance value of first controllable impedance 31b.

In specific implementation process, by changing the value to the first tunable capacitor 31a registers 60 controlled, energy Enough switches for determining the multiple capacitances for forming first tunable capacitor 31a are in unlatching or closed state, and then can determine The capacitance present value of first tunable capacitor 31a；And by changing to the first controllable impedance 31b registers 60 controlled Value, it will be able to determine that the switch for the multiple inductance for forming first controllable impedance 31b is in unlatching or closed state, Jin Erke To determine the current inductance value of first tunable capacitor 31b.

Referring to FIG. 6, for the circuit diagram controlled the first tunable capacitor 31a by a register 60：

First tunable capacitor 31a includes capacitance 61, capacitance 62, capacitance 63, wherein capacitance 61 and 62 size of capacitance are 1pf, 63 size of capacitance are 2pf, and the value of register is 011, so the switch of capacitance 61 is in open state, capacitance 62, capacitance 63 switch is in the open state, so currently form first tunable capacitor 31a capacitance be capacitance 62 and capacitance 63, thus The capacitance present value of first tunable capacitor 31a is：3pf:

And if the value of register is 110, the switch of capacitance 61 and capacitance 62 is in closed state, and capacitance 63 is opened It closes and is in open state, and then the capacitance present value of first tunable capacitor 31a is 2pf etc..

Second aspect, the embodiment of the present application provides a kind of radio circuit, referring to FIG. 7, the radio circuit specifically includes：

Radio frequency chip 70, the radio frequency chip which is introduced by the application any embodiment；

Baseband processor 71 is connected to the radio frequency chip 70,

For sending first control signal to the tunable filter circuit by the control terminal, to tunable filter circuit Frequency filtering is adjusted.

Wherein, when the radio frequency chip 70 includes register 60, with continued reference to FIG. 7, the radio circuit further includes：

Bus 72 is configured, which is connected to by the register 73 by the configuration bus 72, being used for should The first control signal is transmitted to the register 73 caused by baseband processor 71, the frequency filtering to be adjusted.

In specific implementation process, baseband processor 71 is by configuring bus 72 to the first of the composition filter circuit The capacitance present value of tunable capacitor 31a or the current inductance value of the first controllable impedance 31b are modified, and then to adjustable filtered electrical The frequency filtering on road is adjusted, wherein often modification is primary, just measures a RF index, after multiple modification, so that it may with Capacitance present value when obtaining radio-frequency performance preferably and current inductance value, then get off this data record, as adjustable filter The configuration parameter of the frequency filtering of wave circuit 31, so as to prevent frequently to the first tunable capacitor 31a and this is first adjustable Inductance 31b is replaced.

Further, the radio circuit further includes：

Radio-frequency front-end is connected with the radio frequency chip, which specifically includes：Receiving path and transmitting path.

Further, receiving path includes the devices such as low-noise amplifier (LNA), filter, including gain, sensitivity, The indexs such as radio frequency reception bandwidth will be designed according to products characteristics, it is therefore an objective to ensure that useful radiofrequency signal can completely, no Distortion ground picks up and is conveyed to from space the circuits such as the frequency conversion of rear class, intermediate frequency amplification and handled.

Transmitting path is specifically used for the work such as power amplification, filtering, the signal sent is modulated, digital-to-analogue turns It changes, after power amplification etc. a series of activities, sends antenna to and sent.

Further, which further includes：

Antenna is connected with the radio-frequency front-end.

The antenna is mainly used for receiving carries out processing signal by radio-frequency front-end, is then sent to away；Or it is used for The reception signal that other electronic equipments are sent is received, and is sent to radio-frequency front-end and is handled.

As described above, above-mentioned radio circuit is the radio circuit for being provided with above-mentioned radio frequency chip, so, it is above-mentioned to penetrate The structure of frequency circuit is corresponding with one or more embodiments of above-mentioned radio frequency chip, does not just repeat one by one herein.

The third aspect, the embodiment of the present application provide a kind of electronic equipment, which is, for example,：Laptop, hand Machine, tablet computer etc., the embodiment of the present application is not restricted, referring to FIG. 8, the electronic equipment specifically includes：

Shell 80；

Processor 81 is set to inside the shell 80；

The radio circuit 82 that the application any embodiment is introduced, is set to the case surface or inside, with the processing Device 81 is connected, the first signal for sending the processor 81 output.

As described above, above-mentioned electronic equipment is the electronic equipment for being provided with above-mentioned radio circuit, so, above-mentioned electricity The structure of sub- equipment is corresponding with one or more embodiments of above-mentioned radio circuit, does not just repeat one by one herein.

One or more technical solution provided by the present application, has at least the following technical effects or advantages：

(1) since in the embodiment of the present application, tunable filter circuit being set to inside radio frequency chip, so adjustable filtering Power pin distance of the circuit apart from radio frequency chip is closer, so filter effect is more apparent, thus it is dry to have reached reduction power supply The technique effect disturbed；

Further, since the filter circuit being filtered to interference signal caused by power supply is adjustable filtered electrical Road can also be adjusted the filtering parameter of filter circuit, and then make so need not frequently be replaced to filter circuit Filter circuit reaches best filter effect, due to need not frequently replace tunable filter circuit, so it is more square with operating Just technique effect.

(2) since the capacitance for the first tunable capacitor in embodiments of the present invention, forming tunable filter circuit is adjustable, shape Inductance value at the first controllable impedance of tunable filter circuit is also adjustable, so, directly by directly adjusting the first tunable capacitor Capacitance or the inductance value of the first controllable impedance so that tunable filter circuit is reached best filter effect, without frequently more The first adjustable electric perhaps the first controllable impedance is changed, so reached the more convenient technique effect of operation；And prevent electronics Device is because frequently replace caused loss.

(3) since in the embodiment of the present application, any capacitance in the first capacitance value range is less than the first default threshold electricity Capacitance, and then make the small volume of the first tunable capacitor, and in the prior art, the volume of radio frequency chip is typically small, so drop The low technical difficulty that first tunable capacitor is set to radio frequency chip.

(4) since in the embodiment of the present application, any inductance value in the first inductance value range is less than the first default threshold electricity Inductance value, and then make the small volume of the first controllable impedance, to reduce the skill that the first controllable impedance is set to radio frequency chip Art difficulty.

(5) since in the embodiment of the present application, which further includes having register, which is stored with first can The capacitance present value of capacitance and/or the current inductance value of first controllable impedance are adjusted, so, it can be directly in the register Capacitance present value or current inductance value are modified, and then the capacitance of the first tunable capacitor are adjusted or the first adjustable electric The inductance value of sense is adjusted, so reached the more convenient technology of the adjusting to the first adjustable electric perhaps the first controllable impedance Effect, and then more convenient can adjust tunable filter circuit to optimum filtering effect.

It will be understood by those skilled in the art that the embodiment of the present invention can be provided as method, apparatus (equipment) or computer Program product.Therefore, in terms of the present invention can be used complete hardware embodiment, complete software embodiment or combine software and hardware Embodiment form.Moreover, the present invention can be used in one or more wherein include computer usable program code meter The computer journey implemented in calculation machine usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) The form of sequence product.

The present invention be with reference to according to the method for the embodiment of the present invention, the flow chart of device (equipment) and computer program product And/or block diagram describes.It should be understood that each flow in flowchart and/or the block diagram can be realized by computer program instructions And/or the combination of the flow and/or box in box and flowchart and/or the block diagram.These computer programs can be provided to refer to Enable the processor of all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to generate One machine so that by the instruction that computer or the processor of other programmable data processing devices execute generate for realizing The device for the function of being specified in one flow of flow chart or multiple flows and/or one box of block diagram or multiple boxes.

These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy Determine in the computer-readable memory that mode works so that instruction generation stored in the computer readable memory includes referring to Enable the manufacture of device, the command device realize in one flow of flow chart or multiple flows and/or one box of block diagram or The function of being specified in multiple boxes.

These computer program instructions also can be loaded onto a computer or other programmable data processing device so that count Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, in computer or The instruction executed on other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or block diagram one The step of function of being specified in a box or multiple boxes.

Although preferred embodiments of the present invention have been described, it is created once a person skilled in the art knows basic Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as It selects embodiment and falls into all change and modification of the scope of the invention.

Obviously, various changes and modifications can be made to the invention without departing from essence of the invention by those skilled in the art God and range.In this way, if these modifications and changes of the present invention belongs to the range of the claims in the present invention and its equivalent technologies Within, then the present invention is also intended to include these modifications and variations.

Claims (10)

1. a kind of radio frequency chip, which is characterized in that including：

Power pin receives the electric energy that power supply is provided by the power pin；

The adjustable tunable filter circuit of frequency filtering, the first end of the tunable filter circuit are connected with the power pin, institute The second end for stating tunable filter circuit is connected to the control terminal controlled the tunable filter circuit；

Wherein, when being powered to the radio frequency chip by the power pin, by the tunable filter circuit to the confession Interference signal caused by power supply is filtered, to filter out at least part interference signal.

2. radio frequency chip as described in claim 1, which is characterized in that the tunable filter circuit specifically includes：Capacitance exists The first controllable impedance of the first tunable capacitor and inductance value in the first inductance value range in first capacitance value range.

3. radio frequency chip as claimed in claim 2, which is characterized in that first tunable capacitor includes the first pin and second Pin, first controllable impedance include third pin and the 4th pin；First pin is connected with power pin；Described Two pins are connected with the third pin；The 4th pin ground connection.

4. radio frequency chip as claimed in claim 2, which is characterized in that any capacitance in first capacitance value range is small In the first default threshold capacitance.

5. radio frequency chip as claimed in claim 2, which is characterized in that any inductance value in first inductance value range is small In the first default threshold inductance value.

6. the radio frequency chip as described in claim 2-5 any claims, which is characterized in that the radio frequency chip further includes：

Register is connected to the second end, the capacitance present value for storing first tunable capacitor and/or described first The current inductance value of controllable impedance.

7. a kind of radio circuit, which is characterized in that including：

Radio frequency chip as described in claim 1-6 any claims；

Baseband processor is connected to the radio frequency chip, for by the control terminal to tunable filter circuit transmission the One control signal, is adjusted the frequency filtering of tunable filter circuit.

8. radio circuit as claimed in claim 7, which is characterized in that described to penetrate when the radio frequency chip includes register Frequency circuit further includes：

Bus is configured, the baseband processor is connected to by the register by the configuration bus, is used for the base band The first control signal caused by processor is transmitted to the register, the frequency filtering to be adjusted.

9. radio circuit as claimed in claim 7, which is characterized in that the radio circuit further includes：

Radio-frequency front-end is connected with the radio frequency chip.

10. a kind of electronic equipment, which is characterized in that including：

Shell；

Processor is set to the enclosure；

Radio circuit as described in claim 7-9 any claims, is set to the case surface or inside, and described Processor is connected, the first signal for sending the processor output.