CN209184584U - Control circuit and gain circuitry - Google Patents
Control circuit and gain circuitry Download PDFInfo
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- CN209184584U CN209184584U CN201821810287.4U CN201821810287U CN209184584U CN 209184584 U CN209184584 U CN 209184584U CN 201821810287 U CN201821810287 U CN 201821810287U CN 209184584 U CN209184584 U CN 209184584U
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Abstract
The utility model provides a kind of control circuit, comprising: enable pin circuit, counts power supply, counting circuit and coding circuit at internal enabled circuit；Enable pin circuit, internal enabled circuit, counting power supply, counting circuit and coding circuit are sequentially connected in series；Enable pin circuit is for receiving enable signal and internally enabled circuit transmission enable signal；The enabled circuit in inside is used to send enabling signal to counting power supply when receiving the enable signal of enable pin circuit transmission；Counting power supply is used to judge whether the period of enable signal is less than the preset triggering period when receiving the enabling signal that internal enabled circuit is sent, enter power-up state when being not less than；Counting circuit is used to calculate the pulse number in enable signal when counting power supply and entering power-up state；Coding circuit controls adjustable electronic element for generating logic level corresponding with the pulse number, and according to logic level.Using this circuit, it can be achieved that the miniaturization of control chip.
Description
Technical field
The utility model relates to microelectronics technology, in particular to a kind of control circuit.
Background technique
With being constantly progressive for microelectric technique, the technology barrier of original limitation electronics miniaturization is hacked successively,
All kinds of electronic devices are all rapidly developed towards miniaturization, in the hope of realizing the complete function of device with the smallest volume.
Currently, there are many ways of realization for logic control circuit, there are commonly universal input/outputs (GPIO), mobile industry
Processor interface (MIPI) etc., but these control circuits without exception require multiple control interfaces, GPIO generates 8 tunnel logics
Level needs 3 control interfaces, and MIPI needs two control interfaces of clock and data structure.Using multiple control interfaces, it is bound to
It needs to occupy additional space, is unfavorable for controlling the miniaturization of chip.
Therefore, using the logic control circuit of less control interface, the occupied space of control interface is reduced, realizes control
The miniaturization of chip becomes the hot issue of industry urgent need to resolve.
Utility model content
The utility model provides a kind of control circuit, more for solving more control interface occupied spaces, cannot achieve control
The problem of coremaking piece minimizes.
A kind of control circuit, comprising:
Enable pin circuit, counts power supply, counting circuit and coding circuit at internal enabled circuit；
The enable pin circuit, internal enabled circuit, counting power supply, counting circuit and coding circuit are sequentially connected in series；
The enable pin circuit is for receiving enable signal and enabling enable signal described in circuit transmission to the inside；
The inside enable circuit by when receiving the enable signal of the enable pin circuit transmission to based on described
Number power supply sends enabling signal；
The power supply that counts is used to judge described enabled when receiving the enabling signal that the enabled circuit in the inside is sent
Whether the period of signal is less than the preset triggering period, enters power-up state when being not less than；
The counting circuit is used to calculate the pulse in the enable signal when the counting power supply enters power-up state
Number；
The coding circuit is used to generate logic level corresponding with the pulse number, and according to the logic level
Control adjustable electronic element.
Above-mentioned circuit, optionally, further includes:
Waveform shaping circuit；
The waveform shaping circuit enables circuit with the inside and is connected, and carries out for the waveform to the enable signal
Adjustment, so that the waveform of the enable signal is in the span of discrimination of the counting circuit.
The utility model additionally provides a kind of gain circuitry, comprising:
Short antenna, inductance, low-noise amplifier and above-mentioned control circuit；
Wherein, the short antenna, inductance and low-noise amplifier are sequentially connected in series；
Adjustable input capacitance is provided in the low-noise amplifier；
One end of the adjustable input capacitance is connected by the input terminal of the low-noise amplifier with the inductance, separately
One end ground connection；
The control circuit is connected with the adjustable input capacitance；
The control circuit is used for when receiving enable signal, generates logic electricity corresponding with the enable signal
It puts down, and controls the capacitance of the adjustable input capacitance based on the logic level, so that the work of the low-noise amplifier
Frequency and the signal frequency of the short antenna match, to improve the gain effect of the low-noise amplifier.
Above-mentioned gain circuitry, optionally, the adjustable input capacitance includes:
Multiple capacitance groups；
Each capacitance group is parallel with one another；
One end of each capacitance group is connected with the input terminal of the low-noise amplifier, other end ground connection；
It include control switch and the fixed capacity with constant capacitance in each capacitance group；The control switch with
The fixed capacity is connected in series.
It should be noted that control circuit provided by the utility model, during specific implementation, used enabled pipe
Foot circuit, counts power supply, counting circuit and coding circuit at internal enabled circuit, is commonly used electricity in the prior art
Circuit unit.
Energy pin circuit employed in control circuit provided by the utility model, counts power supply, meter at internal enabled circuit
Number circuit and coding circuit can work independently, and realize respective function when working independently；Control provided by the utility model
In circuit processed, enable pin circuit, counts power supply, counting circuit and coding circuit according to attached drawing institute at internal enabled circuit
Show after being attached, respective function is not influenced by connection, and control provided by the utility model may be implemented in the integrated circuit after connection
The repertoire of circuit processed, i.e. reception enable signal calculate the pulse number in enable signal, output and the arteries and veins in enable signal
The corresponding logic level of number is rushed, and controls adjustable electronic element according to the logic level.
It is connection relationship between the composed structure and all parts of entire control circuit that the utility model is claimed,
The composed structure for the control circuit that commonly used circuit block is protected according to the utility model in the prior art and connection are closed
After system is combined, connects, the repertoire of control circuit provided by the utility model can be realized, it is only necessary to which a control connects
Mouthful, receive have different pulse numbers enable signal, calculate enable signal in pulse number, by coding circuit output with
The corresponding logic level of pulse number in enable signal, realize Different Logic level switching, to adjustable electronic element into
Row control.It solves the problems, such as to cause control chip that can not minimize using multiple control interface occupied spaces are excessive, so that control
Coremaking piece can be applied to all kinds of control systems in the form of smaller volume.
Compared with prior art, the utility model includes following advantages:
The utility model provides a kind of control circuit, comprising: enable pin circuit, internal enabled circuit, count power supply,
Counting circuit and coding circuit；The enable pin circuit, counts power supply, counting circuit and coding at internal enabled circuit
Circuit is sequentially connected in series；The enable pin circuit is for receiving enable signal and enabling to enable described in circuit transmission to the inside
Signal；The inside enables circuit and is used for when receiving the enable signal of the enable pin circuit transmission to the counting electricity
Source sends enabling signal；The power supply that counts is used for the judgement when receiving the enabling signal that the enabled circuit in the inside is sent
Whether the period of the enable signal is less than the preset triggering period, enters power-up state when being not less than；The counting circuit
For calculating the pulse number in the enable signal when the counting power supply enters power-up state；The coding circuit is used for
Logic level corresponding with the pulse number is generated, and controls adjustable electronic element according to the logic level.Using this
The control circuit that utility model provides, it is only necessary to which a control interface receives the enable signal for having different pulse numbers, so
Afterwards, counting circuit calculates the pulse number in enable signal, passes through coding circuit output and the pulse number phase in enable signal
Corresponding logic level realizes the switching of Different Logic level, finally, controlling adjustable electronic element.Reduce use
Multiple occupied exceptional spaces of control interface realize the miniaturization of control chip
Detailed description of the invention
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Or attached drawing needed to be used in the description of the prior art is briefly described, it should be apparent that, the accompanying drawings in the following description is only
It is the embodiments of the present invention, for those of ordinary skill in the art, without creative efforts, also
Other attached drawings can be obtained according to the attached drawing of offer.
Fig. 1 is a kind of structural schematic diagram of control circuit provided by the embodiment of the utility model；
Fig. 2 is a kind of another structural schematic diagram of control circuit provided by the embodiment of the utility model；
Fig. 3 is a kind of method flow diagram of control method provided by the embodiment of the utility model；
Fig. 4 is a kind of structural schematic diagram of gain circuitry provided by the embodiment of the utility model；
Fig. 5 is a kind of structural schematic diagram of adjustable input capacitance provided by the embodiment of the utility model.
Specific embodiment
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
Every other embodiment obtained, fall within the protection scope of the utility model.
In this application, the terms "include", "comprise" or any other variant thereof is intended to cover non-exclusive inclusion,
So that the process, method, article or equipment for including a series of elements not only includes those elements, but also including not having
The other element being expressly recited, or further include for elements inherent to such a process, method, article, or device.Do not having
There is the element limited in the case where more limiting by sentence "including a ...", it is not excluded that in the mistake including the element
There is also other identical elements in journey, method, article or equipment.
As shown in Figure 1, being a kind of structural schematic diagram of control circuit provided by the embodiment of the utility model, specifically can wrap
It includes:
Enable pin circuit, counts power supply, counting circuit and coding circuit at internal enabled circuit；
The enable pin circuit, internal enabled circuit, counting power supply, counting circuit and coding circuit are sequentially connected in series；
The enable pin circuit is for receiving enable signal and enabling enable signal described in circuit transmission to the inside；
The inside enable circuit by when receiving the enable signal of the enable pin circuit transmission to based on described
Number power supply sends enabling signal；
The power supply that counts is used to judge described enabled when receiving the enabling signal that the enabled circuit in the inside is sent
Whether the period of signal is less than the preset triggering period, enters power-up state when being not less than；
The counting circuit is used to calculate the pulse in the enable signal when the counting power supply enters power-up state
Number；
The coding circuit is used to generate logic level corresponding with the pulse number, and according to the logic level
Control adjustable electronic element.
Control circuit provided by the embodiment of the utility model, comprising: enable pin circuit, counts electricity at internal enabled circuit
Source, counting circuit and coding circuit；The enable pin circuit, counts power supply, counting circuit and volume at internal enabled circuit
Code circuit is sequentially connected in series；The enable pin circuit is for receiving enable signal and enabling to make described in circuit transmission to the inside
It can signal；The inside enables circuit and is used for when receiving the enable signal of the enable pin circuit transmission to the counting
Power supply sends enabling signal；The power supply that counts is used to sentence when receiving the enabling signal that the enabled circuit in the inside is sent
Whether the period for the enable signal of breaking is less than the preset triggering period, enters power-up state when being not less than；The counting electricity
Road is used to calculate the pulse number in the enable signal when the counting power supply enters power-up state；The coding circuit is used
Adjustable electronic element is controlled in generation logic level corresponding with the pulse number, and according to the logic level.Using
Control circuit provided by the embodiment of the utility model, it is only necessary to which a control interface receives enable signal, and counting circuit calculating makes
Pulse number in energy signal exports logic level corresponding with the pulse number in enable signal by coding circuit, real
The switching of existing Different Logic level, controls external devices.It solves using multiple control interfaces, occupied space is excessive to be led
The problem of causing control chip that can not minimize enables control chip to be applied in reality scene in the form of smaller volume
All kinds of control systems.
As shown in Fig. 2, being a kind of another structural schematic diagram of control circuit provided by the embodiment of the utility model, specifically may be used
To include:
Enable pin circuit, waveform shaping circuit, internal enabled circuit, counter power supply, counting circuit and coding electricity
Road；
The energy pin circuit, waveform shaping circuit, internal enabled circuit, counter power supply, counting circuit and coding
Circuit is sequentially connected in series；
The enable pin circuit is for receiving enable signal and enabling enable signal described in circuit transmission to the inside；
The waveform shaping circuit is for being adjusted the waveform of the enable signal, so that the wave of the enable signal
Shape is in the span of discrimination of the counting circuit；
The inside enables circuit and is used to send enabling signal to the counting power supply when receiving enable signal；
The power supply that counts is used to judge described enabled when receiving the enabling signal that the enabled circuit in the inside is sent
Whether the period of signal is less than the preset triggering period, enters power-up state when being not less than；
The counting circuit is used to calculate the pulse in the enable signal when the counting power supply enters power-up state
Number；
The coding circuit is used to generate logic level corresponding with the pulse number, and according to the logic level
Control adjustable electronic element.
Control circuit provided by the embodiment of the utility model, comprising: enable pin circuit, waveform shaping circuit, inside make
It can circuit, counter power supply, counting circuit and coding circuit；The energy pin circuit, waveform shaping circuit, internal enabled electricity
Road, counter power supply, counting circuit and coding circuit are sequentially connected in series；The enable pin circuit is for receiving enable signal simultaneously
Enable signal described in circuit transmission is enabled to the inside；The waveform shaping circuit be used for the waveform of the enable signal into
Row adjustment, so that the waveform of the enable signal is in the span of discrimination of the counting circuit；The inside enables circuit and uses
In when receiving enable signal to the counting power supply send enabling signal；The counting power supply is used to receive in described
When portion enables the enabling signal that circuit is sent, judge whether the period of the enable signal is less than the preset triggering period, when not
Less than when enter power-up state；The counting circuit is for calculating the enabled letter when the counting power supply enters power-up state
Pulse number in number；The coding circuit is used to generate logic level corresponding with the pulse number, and according to described
Logic level controls adjustable electronic element.
Using control circuit provided by the embodiment of the utility model, it is only necessary to which a control interface is receiving enabled letter
Shaping is carried out to enable signal by waveform shaping circuit after number, counting circuit calculates the enabled letter Jing Guo waveform shaping signal shaping
Pulse number in number exports logic level corresponding with the pulse number in enable signal by coding circuit, realizes not
With the switching of logic level, exterior electrical components are controlled.It solves and is led using multiple control interface occupied spaces are excessive
The problem of causing control chip that can not minimize enables control chip to be applied in reality scene in the form of smaller volume
All kinds of control systems avoid the case where leading to control circuit false triggering because of enable signal burr, increase the standard of control chip
True property, while electrostatic protection and current potential drop-down are provided, so that control circuit is from abrupt impairment caused by static discharge
And the quality testing in latent injury, especially production process can not be found, but control circuit can be made to become during use
Unstable, in-and-out latent injury ensure that the performance of control circuit, so that control chip is relatively reliable.
Corresponding with above-mentioned control circuit, the utility model embodiment provides a kind of control method, as shown in figure 3,
It can specifically include:
S101: when receiving enable signal, judge whether the period of the enable signal is less than the preset triggering period；
In control method provided by the embodiment of the utility model, when control circuit receives enable signal, judge to receive
To period of enable signal whether be less than the preset triggering period.
S102: when being not less than, the pulse number in the enable signal is calculated；
In control method provided by the embodiment of the utility model, determining the received enable signal period not less than preset
It sets out after the period, calculates the pulse number in received enable signal.
S103: according to the pulse number in the enable signal, logic level corresponding with the pulse number is generated；
In control method provided by the embodiment of the utility model, after calculating the pulse number in received enable signal,
According to the pulse number of calculating, logic level corresponding with the pulse number calculated is generated.
S104: adjustable electronic element is controlled according to the logic level.
In control method provided by the embodiment of the utility model, based on generation logic corresponding with the pulse number calculated
Level controls external adjustable electronic element.
Control method provided by the embodiment of the utility model is the control circuit provided based on above-mentioned utility model embodiment
It realizes, when control circuit receives enable signal, judges whether the period of the enable signal received is less than preset touching
Send out the period；Determining that the received enable signal period not less than after the preset period of setting out, calculates in received enable signal
Pulse number；Then, according to the pulse number of calculating, logic level corresponding with the pulse number calculated is generated；Finally, base
In generating logic level corresponding with the pulse number of calculating, external adjustable electronic element is controlled.
The enable signal is judged when receiving enable signal using control method provided by the embodiment of the utility model
Period whether be less than the preset triggering period；When being not less than, the pulse number in the enable signal is calculated；According to described
Pulse number in enable signal generates logic level corresponding with the pulse number；According to the logic level to adjustable
Electronic component is controlled.A control interface is only needed, the enable signal Jing Guo shaping is received, calculates the arteries and veins in enable signal
Number is rushed, logic level corresponding with the pulse number in enable signal is exported by coding circuit, realizes Different Logic electricity
Flat switching, controls exterior electrical components.
As shown in figure 4, being a kind of structural schematic diagram of gain circuitry provided by the embodiment of the utility model, specifically can wrap
It includes:
Short antenna, inductance, low-noise amplifier and control circuit；
The control circuit includes: enable pin circuit, internal enabled circuit, counts power supply, counting circuit and coding
Circuit；
The enable pin circuit, internal enabled circuit, counting power supply, counting circuit and coding circuit are sequentially connected in series；
The enable pin circuit is for receiving enable signal and enabling enable signal described in circuit transmission to the inside；
The inside enable circuit by when receiving the enable signal of the enable pin circuit transmission to based on described
Number power supply sends enabling signal；
The power supply that counts is used to judge described enabled when receiving the enabling signal that the enabled circuit in the inside is sent
Whether the period of signal is less than the preset triggering period, enters power-up state when being not less than；
The counting circuit is used to calculate the pulse in the enable signal when the counting power supply enters power-up state
Number；
The coding circuit is used to generate logic level corresponding with the pulse number, and according to the logic level
Control adjustable electronic element；
Wherein, the short antenna, inductance and low-noise amplifier are sequentially connected in series；
Adjustable input capacitance is provided in the low-noise amplifier；
One end of the adjustable input capacitance is connected by the input terminal of the low-noise amplifier with the inductance, separately
One end ground connection；
The control circuit is connected with the adjustable input capacitance；
The control circuit is used for when receiving enable signal, generates logic electricity corresponding with the enable signal
It puts down, and controls the capacitance of the adjustable input capacitance based on the logic level, so that the work of the low-noise amplifier
Frequency and the signal frequency of the short antenna match, to improve the gain effect of the low-noise amplifier.
Control circuit in above-mentioned gain circuitry can also include: waveform shaping circuit；The waveform shaping circuit and institute
It states internal enabled circuit to be connected, be adjusted for the waveform to the enable signal, so that the waveform of the enable signal
In span of discrimination in the counting circuit.
The utility model implements the gain circuitry provided, comprising: short antenna, inductance, low-noise amplifier and control circuit；
Wherein, the short antenna, inductance and low-noise amplifier are sequentially connected in series；Adjustable input electricity is provided in the low-noise amplifier
Hold；One end of the adjustable input capacitance is connected by the input terminal of the low-noise amplifier with the inductance, the other end
Ground connection；The control circuit is connected with the adjustable input capacitance；The control circuit is used for when receiving enable signal,
Logic level corresponding with the enable signal is generated, and controls the electricity of the adjustable input capacitance based on the logic level
Capacitance, so that the working frequency of the low-noise amplifier and the signal frequency of the short antenna match, it is described low to improve
The gain effect of noise amplifier.
Using gain circuitry provided by the embodiment of the utility model, it is only necessary to which a control interface receives and has different arteries and veins
The enable signal of number is rushed, the pulse number in enable signal is calculated, passes through coding circuit output and the pulse in enable signal
The corresponding logic level of number realizes the switching of Different Logic level, controls adjustable input capacitance in low-noise amplifier
Capacitance is realized so that low-noise amplifier working frequency matches with short antenna signal frequency to the best of short antenna signal
Gain.
As shown in figure 5, be a kind of structural schematic diagram of adjustable input capacitance provided by the embodiment of the utility model, it is described can
Input capacitance is adjusted, can specifically include:
Multiple capacitance groups；
Each capacitance group is parallel with one another；
One end of each capacitance group is connected with the input terminal of the low-noise amplifier, other end ground connection；
It include control switch and the fixed capacity with constant capacitance in each capacitance group；The control switch with
The fixed capacity is connected in series.
In gain circuitry provided by the embodiment of the utility model, control circuit generates and makes according to enable signal is received
The corresponding logic level of pulse number in energy signal, when logic level is 0, the switch in capacitance group is disconnected, and works as logic
Control switch closure when level is 1, in capacitance group.Thus the capacitance group of multiple parallel connections in adjustable input capacitance is controlled, is realized
Adjusting to adjustable input capacitance capacitance, changes the working frequency of low-noise amplifier, so that the low-noise amplifier
Working frequency matches with short antenna signal frequency, realizes the optimum gain to short antenna signal.
Specifically, adjustable input capacitance include four parallel connections and the capacitance order of magnitude successively successively decrease capacitance group C1, C2,
C3, C4 after control circuit receives enable signal, generate logic level corresponding with the pulse number in enable signal, when
Logic level is 0, and the switch in capacitance group disconnects, the control switch closure when logic level is 1, in capacitance group.Thus it controls
The disconnection and closure of control switch in multiple shunt capacitance groups that adjustable input capacitance includes are made, is realized to adjustable input capacitance electricity
The adjusting of capacitance changes the working frequency of low-noise amplifier, so that the working frequency and short antenna of the low-noise amplifier
Signal frequency matches, and realizes the optimum gain to short antenna signal.
For example, when the pulse number in enable signal is 1, logic level 0001, the electricity that adjustable input capacitance includes
The control C4's of Rong Zuzhong closes the switch, and the switch in remaining capacitance group all is at off-state, and adjustable input capacitance value is
Cin=C4；When the pulse number in enable signal is 2, logic level 0010, in the capacitance group that adjustable input capacitance includes
Control C3 close the switch, the switch in remaining capacitance group all is at off-state, and adjustable input capacitance value is Cin=
Adjustable input capacitance is switched to the higher capacitance of the order of magnitude by C3；When the pulse number in enable signal is 3, logic electricity
Putting down is 0011, and the control C3's and C4 in the capacitance group that adjustable input capacitance includes closes the switch, opening in remaining capacitance group
Pass all is at off-state, and adjustable input capacitance value is Cin=C3+C4, slightly in the case where being in high quantity grade capacitance
Micro- capacitance for increasing adjustable input capacitance；The case where including other different pulse numbers in enable signal, control circuit control
The principle of adjustable input capacitance capacitance is identical as above-mentioned example, and details are not described herein again.
Adjustable input capacitance includes: multiple capacitance groups in gain circuitry provided by the embodiment of the utility model；It is each described
Capacitance group is parallel with one another；One end of each capacitance group is connected with the input terminal of the low-noise amplifier, another termination
Ground；It include control switch and the fixed capacity with constant capacitance in each capacitance group；The control switch with it is described
Fixed capacity is connected in series.Using gain circuitry provided by the embodiment of the utility model, it is only necessary to which a control interface, reception have
The enable signal of different pulse numbers, counting circuit calculate the pulse number in enable signal, export and make by coding circuit
The corresponding logic level of pulse number in energy signal, realizes the switching of Different Logic level, controls in adjustable input capacitance
The shutdown of each capacitance group control switch, closure, adjust the capacitance of adjustable input capacitance, so that low-noise amplifier work frequency
Rate matches with short antenna signal frequency, realizes the optimum gain to short antenna signal.
All the embodiments in this specification are described in a progressive manner, same and similar portion between each embodiment
Dividing may refer to each other, and each embodiment focuses on the differences from other embodiments.Especially for system or
For system embodiment, since it is substantially similar to the method embodiment, so describing fairly simple, related place is referring to method
The part of embodiment illustrates.System and system embodiment described above is only schematical, wherein the conduct
The unit of separate part description may or may not be physically separated, component shown as a unit can be or
Person may not be physical unit, it can and it is in one place, or may be distributed over multiple network units.It can root
According to actual need that some or all of the modules therein is selected to achieve the purpose of the solution of this embodiment.Ordinary skill
Personnel can understand and implement without creative efforts.
Professional further appreciates that, unit described in conjunction with the examples disclosed in the embodiments of the present disclosure
And algorithm steps, can be realized with electronic hardware, computer software, or a combination of the two, in order to clearly demonstrate hardware and
The interchangeability of software generally describes each exemplary composition and step according to function in the above description.These
Function is implemented in hardware or software actually, the specific application and design constraint depending on technical solution.Profession
Technical staff can use different methods to achieve the described function each specific application, but this realization is not answered
Think beyond the scope of the utility model.
The foregoing description of the disclosed embodiments can be realized professional and technical personnel in the field or using originally practical new
Type.Various modifications to these embodiments will be readily apparent to those skilled in the art, and determine herein
The General Principle of justice can be realized in other embodiments without departing from the spirit or scope of the present utility model.Cause
This, the present invention will not be limited to the embodiments shown herein, and is to fit to and principles disclosed herein
The widest scope consistent with features of novelty.
Claims (4)
1. a kind of control circuit characterized by comprising
Enable pin circuit, counts power supply, counting circuit and coding circuit at internal enabled circuit；
The enable pin circuit, internal enabled circuit, counting power supply, counting circuit and coding circuit are sequentially connected in series；
The enable pin circuit is for receiving enable signal and enabling enable signal described in circuit transmission to the inside；
The inside enables circuit and is used for when receiving the enable signal of the enable pin circuit transmission to the counting electricity
Source sends enabling signal；
The power supply that counts is used to judge the enable signal when receiving the enabling signal that the enabled circuit in the inside is sent
Period whether be less than the preset triggering period, when not less than when enter power-up state；
The counting circuit is used to calculate the pulse number in the enable signal when the counting power supply enters power-up state；
The coding circuit is controlled for generating logic level corresponding with the pulse number, and according to the logic level
Adjustable electronic element.
2. circuit as described in claim 1, which is characterized in that further include:
Waveform shaping circuit；
The waveform shaping circuit enables circuit with the inside and is connected, and adjusts for the waveform to the enable signal
It is whole, so that the waveform of the enable signal is in the span of discrimination of the counting circuit.
3. a kind of gain circuitry characterized by comprising
Control circuit described in short antenna, inductance, low-noise amplifier and claim 1~2 any one；
Wherein, the short antenna, inductance and low-noise amplifier are sequentially connected in series；
Adjustable input capacitance is provided in the low-noise amplifier；
One end of the adjustable input capacitance is connected by the input terminal of the low-noise amplifier with the inductance, the other end
Ground connection；
The control circuit is connected with the adjustable input capacitance；
The control circuit is used for when receiving enable signal, generates logic level corresponding with the enable signal, and
The capacitance of the adjustable input capacitance is controlled based on the logic level so that the working frequency of the low-noise amplifier with
The signal frequency of the short antenna matches, to improve the gain effect of the low-noise amplifier.
4. circuit as claimed in claim 3, which is characterized in that the adjustable input capacitance includes:
Multiple capacitance groups；
Each capacitance group is parallel with one another；
One end of each capacitance group is connected with the input terminal of the low-noise amplifier, other end ground connection；
It include control switch and the fixed capacity with constant capacitance in each capacitance group；The control switch with it is described
Fixed capacity is connected in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821810287.4U CN209184584U (en) | 2018-11-05 | 2018-11-05 | Control circuit and gain circuitry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821810287.4U CN209184584U (en) | 2018-11-05 | 2018-11-05 | Control circuit and gain circuitry |
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| Publication Number | Publication Date |
|---|---|
| CN209184584U true CN209184584U (en) | 2019-07-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821810287.4U Active CN209184584U (en) | 2018-11-05 | 2018-11-05 | Control circuit and gain circuitry |
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| CN (1) | CN209184584U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109257041A (en) * | 2018-11-05 | 2019-01-22 | 上海艾为电子技术股份有限公司 | control circuit and control method |
-
2018
- 2018-11-05 CN CN201821810287.4U patent/CN209184584U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109257041A (en) * | 2018-11-05 | 2019-01-22 | 上海艾为电子技术股份有限公司 | control circuit and control method |
| CN109257041B (en) * | 2018-11-05 | 2024-05-10 | 上海艾为电子技术股份有限公司 | Control circuit and control method |
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