CN104639070A - Integrated circuit and user terminal - Google Patents
Integrated circuit and user terminal Download PDFInfo
- Publication number
- CN104639070A CN104639070A CN201310567292.2A CN201310567292A CN104639070A CN 104639070 A CN104639070 A CN 104639070A CN 201310567292 A CN201310567292 A CN 201310567292A CN 104639070 A CN104639070 A CN 104639070A
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- CN
- China
- Prior art keywords
- input
- signal
- circuit
- integrated circuit
- input signal
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Classifications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/20—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F3/21—Power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
- H03F3/217—Class D power amplifiers; Switching amplifiers
- H03F3/2178—Class D power amplifiers; Switching amplifiers using more than one switch or switching amplifier in parallel or in series
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2200/00—Indexing scheme relating to amplifiers
- H03F2200/03—Indexing scheme relating to amplifiers the amplifier being designed for audio applications
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F2203/00—Indexing scheme relating to amplifiers with only discharge tubes or only semiconductor devices as amplifying elements covered by H03F3/00
- H03F2203/20—Indexing scheme relating to power amplifiers, e.g. Class B amplifiers, Class C amplifiers
- H03F2203/21—Indexing scheme relating to power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only
- H03F2203/211—Indexing scheme relating to power amplifiers, e.g. Class B amplifiers, Class C amplifiers with semiconductor devices only using a combination of several amplifiers
- H03F2203/21136—An input signal of a power amplifier being on/off switched
Abstract
The invention discloses an integrated circuit and a user terminal. The integrated circuit comprises a first controller, a comparator, a drive circuit and a power amplifying circuit, wherein the first controller controls input signals to be input, the comparator is connected with the output end of the first controller, the drive circuit is connected with the output end of the comparator, and the power amplifying circuit is connected with the output end of the drive circuit. By means of the integrated circuit, the area of a chip can be narrowed, the cost of the chip can be reduced, and the size of a terminal device can be reduced.
Description
Technical field
The present invention relates to electronic circuit technology field, be specifically related to a kind of integrated circuit and user terminal.
Background technology
Step-down conversion circuit, is generally used for input voltage to convert, to obtain the circuit of the output voltage being less than described input voltage.
D class amplification circuit, is generally used for the audio signal of input to amplify, to obtain the circuit of the audio signal that can drive loud speaker.
In actual applications, terminal equipment is provided with step-down conversion circuit and D class amplification circuit usually simultaneously.Such as, step-down conversion circuit can be arranged in the charging circuit of certain mobile phone, for the voltage transformation of input is become battery of mobile phone acceptable voltage.And D class amplification circuit is arranged in the audio playing circuit of mobile phone usually, the audio signal conversion that user can be inputted is amplified, and the audio signal after amplification exports through the loud speaker of mobile phone, namely can be the music etc. that user provides selected.
But existing step-down conversion circuit and D class amplification circuit are two separate circuit, when the two being arranged on a certain terminal equipment simultaneously, can increase the area of chip, the cost of chip is caused to increase.
Summary of the invention
The problem that the embodiment of the present invention solves is the area how reducing chip, to reduce the cost of described chip, reduces terminal equipment volume.
For solving the problem, the embodiment of the present invention provides a kind of integrated circuit, and described integrated circuit comprises: the first controller of control inputs signal input; The comparator be connected with the output of described first controller; The drive circuit be connected with the output of described comparator; And the power amplification circuit to be connected with the output of described drive circuit.
Alternatively, described first controller comprises: the first input signal end, the second input signal end, the control end supplying control signal input and the selector switch be connected with described control end, one end of described selector switch is connected with the input of described comparator, and the other end of described selector switch connects described first input signal end or the second input signal end under the control signal of described control end controls.
Alternatively, described first controller comprises: the selector be connected with the input of described comparator, described selector comprises for the first input pin of input signal input, for the second input pin of input signal input and the control pin for control signal input, the control signal of described control pin input controls described selector and exports the input signal of described first input pin or the input signal of described second input pin.
Alternatively, described power amplification circuit comprises: PMOS, and the NMOS tube be connected with the source electrode of described PMOS, and described PMOS is connected with the output of described drive circuit respectively with the grid of described NMOS tube.
Alternatively, described drive circuit is gate driver circuit.
Alternatively, described integrated circuit also comprises: be connected with the output of described amplifying circuit and the signal of the output of described amplifying circuit carried out to the low pass filter of filtering.
Embodiments of the invention additionally provide a kind of user terminal, and described user terminal comprises above-mentioned integrated circuit.
Compared with prior art, the technical scheme of the embodiment of the present invention has the following advantages:
By the input of the first controller control inputs signal, different input signals can be made to input to comparator, the output signal of described comparator inputs to different loads after power amplification, make integrated circuit both can have the function of step-down, the function of power amplification can be had again, and step-down conversion circuit and D class amplification circuit need not be set separately, thus can chip area be reduced, reduce the cost of chip and reduce the volume of terminal equipment.
Accompanying drawing explanation
Fig. 1 is the structural representation of integrated circuit in the embodiment of the present invention one;
Fig. 2 is the structural representation of a kind of first controller in the embodiment of the present invention one;
Fig. 3 is the structural representation of another kind of first controller in the embodiment of the present invention one;
Fig. 4 is the structural representation of integrated circuit in the embodiment of the present invention two.
Embodiment
Because existing step-down conversion circuit and D class amplification circuit are two separate circuit, the area of chip is caused to increase, therefore, for the problems referred to above, The embodiment provides a kind of integrated circuit, described integrated circuit inputs to comparator by control inputs signal, and the output signal of described comparator is carried out power amplification, described integrated circuit is made both to have had the function of step-down, there is again the function of amplification, and step-down conversion circuit and D class amplification circuit need not be set separately, effectively can reduce the area of chip.
For enabling above-mentioned purpose of the present invention, feature and advantage more become apparent, and are described in detail specific embodiments of the invention below in conjunction with accompanying drawing.
Embodiment one
See Fig. 1, present embodiments provide a kind of integrated circuit 100, described integrated circuit 100 can comprise: the first controller 110 of control inputs signal input; The comparator 120 be connected with the output of described first controller 110; The drive circuit 130 be connected with the output of described comparator 120; And the power amplification circuit 140 to be connected with the output of described drive circuit 130.
In concrete enforcement, described comparator 120 can be pulse modulation comparator.Described pulse modulation comparator comprises in-phase end and end of oppisite phase, and the input signal of in-phase end and the input signal of end of oppisite phase for inputting different signals, and compare by described in-phase end and end of oppisite phase, and output pulse width can modulation signal.
In the present embodiment, the input signal of described comparator 120 in-phase end such as is at the triangular signal of amplitude, and the frequency of described triangular signal can be set according to actual needs by technical staff.The input signal of described comparator 120 end of oppisite phase can be the first input signal or the second input signal.Wherein said first input signal can for flow voltage signal always, and described second input signal can be audio input signal.Under the control of the first controller 110, described first input signal or the second input signal are inputed to comparator 120, in comparator 120, triangular signal and the first input signal or the second input signal are compared, obtain the signal that the pulse duration corresponding with described first input signal can be modulated, or the signal that the acquisition pulse duration corresponding with described second input signal can be modulated.
See Fig. 2, in concrete enforcement, described first controller 110 can comprise: the first input signal end in1, the second input signal end in2, the control end ctrl supplying control signal input and the selector switch 1102 be connected with described control end ctrl.
Wherein, one end of described selector switch ctrl is connected with described control end 1106, and the other end is connected with the input of described comparator 120.Described first input signal end in1 or the second input signal end 1104 is connected under the control of the control signal that described selector switch ctrl inputs at described control end ctrl.When described selector switch ctrl is connected with the first input signal end in1 under the control of said control signal, the input signal of described first input signal end in1 inputs to comparator 120.When described selector switch ctrl is connected with the second input signal end 1104 under the control of said control signal, the input signal of described first input signal end in1 inputs to comparator 120.
Described first input signal can input to the first controller 110 by the first input signal end in1, and described second input signal can input to the first controller 110 by the second input signal end 1104; Or the first input signal can input to the first controller 110, second input signal by the first input signal end in1 and input to the first controller 110 by the second input signal end in2.
In concrete enforcement, the control signal inputing to described control end ctrl can be control operation, also can be control command, can also be a certain digital signal.Wherein, described control operation can the operation such as twisting, button implemented on control end of user.Described control command can be the instruction sent by other equipment such as computer or chip.Described digital signal can reach by the corresponding relation arranging low and high level and described selector switch ctrl action the object controlling described selector switch, such as when the input value of described digital signal is high level, described selector switch ctrl is connected with the first input signal end in1, when the input value of described digital input signals is low level, described selector switch ctrl is connected with the second input signal end in2.Regardless of the form of described control signal, as long as the action of selector switch ctrl can be controlled.
See Fig. 3, described first controller 110 can comprise: the selector 1100 be connected with the input of described comparator 120.Wherein, described selector 1100 can be chip, and described chip can be arranged for the first input pin in1 ' of input signal input, for the second input pin in2 ' of input signal input and the control pin ctrl ' for control signal input.By writing corresponding control program in described chip, the output out ' that the control signal that described control pin ctrl ' is inputted can control described selector 1100 exports the input signal of the first input pin in1 ' or the input signal of described second input pin in2 '.
Embodiment two
See Fig. 4, in the present embodiment, described power amplification circuit 140, under the driving of drive circuit 130, amplifies the power of the signal that the pulse duration of described comparator 120 output can be modulated.Wherein, the rectangle square wave that the signal that the pulse duration that described comparator 120 exports can be modulated can not wait for a series of pulse duration.Described rectangle square wave input is amplified to power amplification circuit 140.Be described in detail below in conjunction with concrete power amplification circuit 140:
In the specific implementation, described power amplification circuit 140 can comprise: PMOS, and the NMOS tube be connected with the source electrode of described PMOS, and described PMOS is connected with described drive circuit respectively with the grid of described NMOS tube.Namely the input voltage of described integrated circuit 100 is applied to the voltage V of described PMOS drain electrode
dD.Accordingly, described drive circuit 130 can be gate driver circuit.Due to the impact of the resistance of PMOS self, described power amplification circuit 140 is made always to be less than input voltage V at the output voltage of a point
dD.Such as, described V
dDduring for 5V, the output voltage of a point is 3.6V.
It should be noted that, power amplification circuit 140 in the present embodiment can also adopt other circuit realiration, accordingly, as long as described drive circuit 140 can drive the power of the output signal of described power amplification circuit 140 pairs of comparators 120 to amplify, be not construed as limiting herein.
After the output signal of comparator 120 is carried out power amplification by power amplification circuit 140, relative to the former signal inputing to comparator 120, the output signal of described power amplification circuit 140 includes some high fdrequency components, when described high fdrequency component inputs to load, easily cause the former distortion inputing to the signal of comparator 120.Therefore, in order to reduce the former distortion inputing to comparator 120 signal, described integrated circuit 100 can also comprise low pass filter 150.Wherein, described low pass filter 150 can comprise the inductance L be connected with the output of described power amplification circuit 140 and the electric capacity C be connected with the output of described inductance L.One end of wherein said electric capacity C is connected with described inductance L, other end ground connection, and the output of described filter 150 is b end.Like this, the high fdrequency component in the output signal of described power amplification circuit 140 can be filtered by described filter 150, obtains the output signal low frequency components of described power amplification circuit 140, and exports different loads to through b end.
In concrete enforcement, the output of described integrated circuit 100 and b end can be connected to different loads, when being connected from different loads by the output of described integrated circuit 100, can be manually connected with load by described output.
Such as described load can be inductance, can also be loudspeaker.When the input signal that described first controller 110 is selected is audio input signal, corresponding load can be loudspeaker, and like this, the audio input signal through power amplification inputs to loudspeaker, can think that user plays required music.When the input signal that described first controller 110 is selected is d. c. voltage signal, described load can be inductance, thus obtains the output of described integrated circuit 100 correspondence.
Embodiment three
Present embodiments provide a kind of user terminal, the integrated circuit in above-described embodiment can be set in described user terminal.
In the specific implementation, described user terminal can be the terminal equipment such as mobile phone, computer.The application of described integrated circuit, can make the chip area of original subscriber's terminal reduce, thus the volume of described user terminal is reduced.
Although the present invention discloses as above, the present invention is not defined in this.Any those skilled in the art, without departing from the spirit and scope of the present invention, all can make various changes or modifications, and therefore protection scope of the present invention should be as the criterion with claim limited range.
Claims (7)
1. an integrated circuit, is characterized in that, comprising: the first controller of control inputs signal input; The comparator be connected with the output of described first controller; The drive circuit be connected with the output of described comparator; And the power amplification circuit to be connected with the output of described drive circuit.
2. integrated circuit as claimed in claim 1, it is characterized in that, described first controller comprises: the first input signal end, the second input signal end, the control end supplying control signal input and the selector switch be connected with described control end, one end of described selector switch is connected with the input of described comparator, and the other end of described selector switch connects described first input signal end or the second input signal end under the control signal of described control end controls.
3. integrated circuit as claimed in claim 1, it is characterized in that, described first controller comprises: the selector be connected with the input of described comparator, described selector comprises for the first input pin of input signal input, for the second input pin of input signal input and the control pin for control signal input, the control signal of described control pin input controls described selector and exports the input signal of described first input pin or the input signal of described second input pin.
4. integrated circuit as claimed in claim 1, it is characterized in that, described power amplification circuit comprises: PMOS, and the NMOS tube be connected with the source electrode of described PMOS, and described PMOS is connected with the output of described drive circuit respectively with the grid of described NMOS tube.
5. integrated circuit as claimed in claim 4, it is characterized in that, described drive circuit is gate driver circuit.
6. integrated circuit as claimed in claim 1, is characterized in that, also comprise: be connected with the output of described amplifying circuit and the signal of the output of described amplifying circuit carried out to the low pass filter of filtering.
7. a user terminal, is characterized in that, comprises the integrated circuit as described in any one of claim 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310567292.2A CN104639070B (en) | 2013-11-14 | 2013-11-14 | Integrated circuit and user terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310567292.2A CN104639070B (en) | 2013-11-14 | 2013-11-14 | Integrated circuit and user terminal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104639070A true CN104639070A (en) | 2015-05-20 |
| CN104639070B CN104639070B (en) | 2017-08-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310567292.2A Active CN104639070B (en) | 2013-11-14 | 2013-11-14 | Integrated circuit and user terminal |
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| Country | Link |
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| CN (1) | CN104639070B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105048980A (en) * | 2015-08-18 | 2015-11-11 | 矽力杰半导体技术(杭州)有限公司 | Class D amplifier |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011077739A (en) * | 2009-09-30 | 2011-04-14 | Yamaha Corp | Amplifier circuit |
| CN102195576A (en) * | 2011-02-01 | 2011-09-21 | 上海矽诺微电子有限公司 | Audio amplifier working in double modes |
| CN102355204A (en) * | 2011-05-20 | 2012-02-15 | 深圳市纳芯威科技有限公司 | Automatic audio power amplifier switching circuit and power amplifier chip |
-
2013
- 2013-11-14 CN CN201310567292.2A patent/CN104639070B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011077739A (en) * | 2009-09-30 | 2011-04-14 | Yamaha Corp | Amplifier circuit |
| CN102195576A (en) * | 2011-02-01 | 2011-09-21 | 上海矽诺微电子有限公司 | Audio amplifier working in double modes |
| CN102355204A (en) * | 2011-05-20 | 2012-02-15 | 深圳市纳芯威科技有限公司 | Automatic audio power amplifier switching circuit and power amplifier chip |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105048980A (en) * | 2015-08-18 | 2015-11-11 | 矽力杰半导体技术(杭州)有限公司 | Class D amplifier |
| US9955257B2 (en) | 2015-08-18 | 2018-04-24 | Silergy Semiconductor Technology (Hangzhou) Ltd. | Class-D audio amplifier |
| CN105048980B (en) * | 2015-08-18 | 2018-09-18 | 矽力杰半导体技术(杭州)有限公司 | A kind of D audio frequency amplifier |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104639070B (en) | 2017-08-25 |
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