CN205123581U - A charge pump for in G class amplifier - Google Patents
A charge pump for in G class amplifier Download PDFInfo
- Publication number
- CN205123581U CN205123581U CN201520834682.6U CN201520834682U CN205123581U CN 205123581 U CN205123581 U CN 205123581U CN 201520834682 U CN201520834682 U CN 201520834682U CN 205123581 U CN205123581 U CN 205123581U
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Abstract
The utility model provides a charge pump for in G class amplifier, it includes: first output, the second output, the input voltage end, connected node in the middle of first, connected node in the middle of the second, connect the output capacitance between first output and earthing terminal, connect the 2nd output capacitance between second output and earthing terminal, connect the first switch between input voltage end and first middle connected node, connect the third switch between first middle connected node and first output, connect the 5th switch between first middle connected node and second output, connect the electric capacity that flies between first middle connected node and the middle connected node of second, connect in the second switch between connected node and the first output in the middle of the second, connect in the fourth switch between connected node and the earthing terminal in the middle of the second. The utility model provides a charge pump only needs one and flies electric capacity, and simple structure is with low costs.
Description
[technical field]
The utility model relates to field of charge pumps, particularly a kind of for the charge pump in G class A amplifier A.
[background technology]
G class A amplifier A (ClassGamplifier) is normally used for raising the efficiency in voicefrequency circuit, saves electric energy.Generally contain a charge pump circuit in G class A amplifier A, it can produce positive and negative voltage.Publication number is describe a kind of charge pump circuit in the U.S. Patent application of US20130314151, as shown in Figure 1, it flies electric capacity (flyingcapacitor) Cf1 and Cf2 by two and forms two kinds of mode of operations, produces-VDD/2 and+VDD/2 under the first mode of operation; Produce-VDD and+VDD under second mode of operation, wherein VDD is input voltage.
Two fly electric capacity and need more peripheral components, can increase cost, are unfavorable for miniaturization because of the more printed circuit board area of needs simultaneously.Meanwhile, two fly electric capacity and need 4 chip pins, can increase chip package like this, also be unfavorable for miniaturization, and encapsulation is larger, and cost is higher.
Therefore be necessary to provide a kind of new solution to solve the problems referred to above.
[utility model content]
The purpose of this utility model is to provide a kind of for the charge pump in G class A amplifier A, and its needs one fly electric capacity, and structure is simple, and cost is low.
For achieving the above object, the utility model provides a kind of charge pump, and it comprises: the first output; Second output; Input voltage terminal; First intermediate connecting node; Second intermediate connecting node; Be connected to the first output capacitance between the first output and ground; Be connected to the second output capacitance between the second output and ground; Be connected to the first switch between Input voltage terminal and the first intermediate connecting node; Be connected to the 3rd switch between the first intermediate connecting node and the first output; Be connected to the 5th switch between the first intermediate connecting node and the second output; Be connected to and fly electric capacity between the first intermediate connecting node and the second intermediate connecting node; Be connected to the second switch between the second intermediate connecting node and the first output; Be connected to the 4th switch between the second intermediate connecting node and earth terminal.
Further, in the first stage, the first switch and second switch conducting, rest switch ends; In second stage, the 3rd switch and the 4th switch conduction, rest switch ends; In the phase III, the 4th switch conduction and the 5th switch conduction, rest switch ends.
Further, first clock signal controls conducting or the cut-off of the first switch and second switch, when the first clock signal is significant level, and the conducting of the first switch and second switch, when the first clock signal is inactive level, the cut-off of the first switch and second switch; The conducting of second clock signal controlling the 3rd switch or cut-off, when second clock signal is significant level, the 3rd switch conduction, when second clock signal is inactive level, the 3rd switch cut-off; 3rd clock signal controls conducting or the cut-off of the 5th switch, when the 3rd clock signal is significant level, and the 5th switch conduction, when the 3rd clock signal is inactive level, the 5th switch cut-off; The conducting of second clock signal or the 3rd clock signal co-controlling the 4th switch or cut-off, when second clock signal or the 3rd clock signal are significant level, 4th switch conduction, when second clock signal or the 3rd clock signal are inactive level, 4th switch cut-off, the first clock signal, second clock signal and the 3rd clock signal are the not overlapping clocks of significant level.
Further, described charge pump also comprises and also has first or door, and the first clock signal is connected with the control end of second switch with the first switch; Second clock signal is connected with the control end of the 3rd switch; Second clock signal is also connected with the first input end of described first or door, and the 3rd clock signal is connected with the second input of described first or door; 3rd clock signal is also connected with the control end of the 5th switch, and significant level is high level, and inactive level is low level.
Further, in the first stage, the first switch and second switch conducting, rest switch ends; In second stage, the 3rd switch and the 4th switch conduction, rest switch ends; In the phase III, the first switch and second switch conducting, rest switch ends; At four-stage, the 4th switch conduction and the 5th switch conduction, rest switch ends.
Further, the conducting of the first clock signal and the 3rd clock signal co-controlling first switch and second switch or cut-off, when the first clock signal or the 3rd clock signal are significant level, the conducting of the first switch and second switch, when the first clock signal or the 3rd clock signal are inactive level, the cut-off of the first switch and second switch; The conducting of second clock signal controlling the 3rd switch or cut-off, when second clock signal is significant level, the 3rd switch conduction, when second clock signal is inactive level, the 3rd switch cut-off; 4th clock signal controls conducting or the cut-off of the 5th switch, when the 4th clock signal is significant level, and the 5th switch conduction, when the 4th clock signal is inactive level, the 5th switch cut-off; The conducting of second clock signal or the 4th clock signal co-controlling the 4th switch or cut-off, when second clock signal or the 4th clock signal are significant level, 4th switch conduction, when second clock signal or the 4th clock signal are inactive level, 4th switch cut-off, the first clock signal, second clock signal, the 3rd clock signal and the 4th clock signal are the not overlapping clocks of significant level.
Compared with prior art, the charge pump in the utility model, only needs one and flies electric capacity, and structure is simple, and cost is low.
[accompanying drawing explanation]
In conjunction with reference accompanying drawing and ensuing detailed description, the utility model will be easier to understand, the structure member that wherein same Reference numeral is corresponding same, wherein:
Fig. 1 is the circuit diagram of existing charge pump;
Fig. 2 is the charge pump circuit diagram in one embodiment in the utility model;
Fig. 3 is the circuit diagram of charge pump in another is implemented in the utility model.
[embodiment]
For enabling above-mentioned purpose of the present utility model, feature and advantage become apparent more, are described in further detail the utility model below in conjunction with the drawings and specific embodiments.
Alleged herein " embodiment " or " embodiment " refers to that the special characteristic relevant to described embodiment, structure or characteristic at least can be contained at least one implementation of the utility model.Different local in this manual " in one embodiment " occurred be non-essential all refers to same embodiment, must not be yet with other embodiments mutually exclusive separately or select embodiment." multiple ", " some " in the utility model represent two or more."and/or" in the utility model represents " with " or "or".
Fig. 2 is the charge pump circuit diagram in one embodiment in the utility model.As shown in Figure 2, described charge pump comprises: the first output VO1, second output VO2, Input voltage terminal, first intermediate connecting node M1, second intermediate connecting node M2, be connected to the first output capacitance Co1 between the first output VO1 and earth terminal, be connected to the second output capacitance Co2 between the second output VO2 and earth terminal, be connected to the first switch S 11 between Input voltage terminal and the first intermediate connecting node M1, be connected to the 3rd switch S 21 between the first intermediate connecting node M1 and the first output VO1, be connected to the 5th switch S 31 between the first intermediate connecting node M1 and the second output VO2, be connected to and fly electric capacity C1 between the first intermediate connecting node M1 and the second intermediate connecting node M2, be connected to the second switch S12 between the second intermediate connecting node M2 and the first output VO1, be connected to the 4th switch S 22 between the second intermediate connecting node M2 and earth terminal.Input voltage terminal is connected with input voltage source VDD.
In one embodiment, point three phases controls conducting or the cut-off of each switch, produces corresponding output voltage to make described charge pump.
In the first stage, the first switch S 11 and second switch S12 conducting, rest switch ends.Now fly after electric capacity C1 connects with the first output capacitance Co1, more in parallel with input voltage source VDD.
Therefore have: VC1+VO1=VDD (1)
Wherein VC1 is the magnitude of voltage flying electric capacity C1 two ends, and VDD is the magnitude of voltage of input voltage source VDD, and VO1 is the voltage of the first output.
In second stage, the 3rd switch S 21 and the 4th switch S 22 conducting, rest switch ends.Now, electric capacity C1 is flown in parallel with the first output capacitance Co1.
Therefore have: VC1=VO1 (2)
In the phase III, the 4th switch S 22 conducting and the 5th switch S 31 conducting, rest switch ends.Fly electric capacity C1 in parallel with the second output capacitance Co2 in Opposite direction connection mode.
Therefore have :-VC1=VO2 (3)
Wherein VO2 is the voltage of the second output.
Above-mentioned three equations of simultaneous solve and can obtain:
VC1＝+VDD/2，VO1＝+VDD/2，VO2＝-VDD/2
As shown in Figure 2, first clock signal C K1 controls conducting or the cut-off of the first switch S 11 and second switch S12, when the first clock signal C K1 is significant level, the conducting of the first switch S 11 and second switch S12, when the first clock signal C K1 is inactive level, the cut-off of the first switch S 11 and second switch S12.Second clock signal CK2 controls conducting or the cut-off of the 3rd switch S 21, and when second clock signal CK2 is significant level, the 3rd switch S 21 conducting, when second clock signal CK2 is inactive level, the 3rd switch S 21 is ended.3rd clock signal C K3 controls conducting or the cut-off of the 5th switch S 31, and when the 3rd clock signal C K3 is significant level, the 5th switch S 31 conducting, when the 3rd clock signal C K3 is inactive level, the 5th switch S 31 is ended.The conducting of second clock signal CK2 or the 3rd clock signal C K3 co-controlling the 4th switch S 22 or cut-off, when second clock signal CK2 or the 3rd clock signal C K3 is significant level, 4th switch S 22 conducting, when second clock signal CK2 or the 3rd clock signal C K3 is inactive level, the 4th switch S 22 is ended.First clock signal C K1, second clock signal CK2 and the 3rd clock signal C K3 are the not overlapping clocks of significant level.
As shown in Figure 2, described charge pump also comprises and also has first or door OR11.First clock signal C K1 is connected with the control end of second switch S12 with the first switch S 11.Second clock signal CK2 is connected with the control end of the 3rd switch S 21.Second clock signal CK2 is also connected with the first input end of described first or door OR11.3rd clock signal C K3 is connected with second input of described first or door OR.3rd clock signal C K3 is also connected with the control end of the 5th switch S 31, and significant level is high level, and inactive level is low level.
Fig. 3 is the circuit diagram of charge pump in another is implemented in the utility model.As substantially identical with the charge pump in Fig. 2 in the charge pump in 3, difference is that the Control timing sequence of the first switch S 11 in Fig. 3, second switch S12, the 3rd switch S 21, the 4th switch S 22, the 5th switch S 31 is different.
In this embodiment, point four-stage controls conducting or the cut-off of each switch, produces corresponding output voltage to make described charge pump.
In the first stage, the first switch S 11 and second switch S12 conducting, rest switch ends.Fly after electric capacity C1 connects with the first output capacitance Co1, more in parallel with input voltage source VDD.
Therefore have: VC1+VO1=VDD (1)
Wherein VC1 is the magnitude of voltage at electric capacity C1 two ends, and VDD is the magnitude of voltage of input voltage source VDD, and VO1 is the first output voltage.
In second stage, the 3rd switch S 21 and the 4th switch S 22 conducting, rest switch ends.Fly electric capacity C1 in parallel with the first output capacitance Co1.
Therefore have: VC1=VO1 (2)
In the phase III, the first switch S 11 and second switch S12 conducting, rest switch ends.Fly after electric capacity C1 connects with the first output capacitance Co1, more in parallel with input voltage source VDD.
Therefore: VC1+VO1=VDD (3)
At four-stage, the 4th switch S 22 conducting and the 5th switch S 31 conducting, rest switch ends.Fly electric capacity C1 in parallel with the second output capacitance Co2 in Opposite direction connection mode.
Therefore have: VC1=-VO2 (4)
Wherein VC1 is the magnitude of voltage at electric capacity C1 two ends, and VO2 is the voltage of the second output.
In this embodiment, the conducting of the first clock signal C K1 and the 3rd clock signal C K3 co-controlling first switch S 11 and second switch S12 or cut-off, when the first clock signal C K1 or the 3rd clock signal C K3 is significant level, the conducting of the first switch S 11 and second switch S12, when the first clock signal C K1 or the 3rd clock signal C K3 is inactive level, the cut-off of the first switch S 11 and second switch S12.Second clock signal CK2 controls conducting or the cut-off of the 3rd switch S 21, and when second clock signal CK2 is significant level, the 3rd switch S 21 conducting, when second clock signal CK2 is inactive level, the 3rd switch S 21 is ended.4th clock signal C K4 controls conducting or the cut-off of the 5th switch S 31, and when the 4th clock signal C K4 is significant level, the 5th switch S 31 conducting, when the 4th clock signal C K4 is inactive level, the 5th switch S 31 is ended.The conducting of second clock signal CK2 or the 4th clock signal C K4 co-controlling the 4th switch S 22 or cut-off, when second clock signal CK2 or the 4th clock signal C K4 is significant level, 4th switch S 22 conducting, when second clock signal CK2 or the 4th clock signal C K4 is inactive level, the 4th switch S 22 is ended.First clock signal C K1, second clock signal CK2, the 3rd clock signal C K3 and the 4th clock signal C K4 are the not overlapping clocks of significant level.
As shown in Figure 3, described charge pump also comprises first or door OR1, second or door OR2, the 3rd or door OR3.First clock signal C K1 is connected with the second input with the first input end of the 3rd or door OR3 respectively with the 3rd clock signal C K3, the 3rd or the output of door OR3 be connected with the control end of the first switch S 11.Second clock signal CK2 is connected with the control end of the 3rd switch S 21.First clock signal C K11 is connected with the second input with the first input end of second or door OR2 respectively with the 3rd clock signal C K12, second or the output of door OR2 be connected with the control end of second switch S12.Second clock signal CK2 is connected with the second input with the first input end of first or door OR1 respectively with the 4th clock signal C K4, first or the output of door OR1 be connected with the control end of the 4th switch S 22.4th clock signal C K4 is also connected with the control end of the 5th switch S 31, and significant level is high level, and inactive level is low level.
In the utility model, essentially describe the mode of operation producing-VDD/2 and+VDD/2, and adopt prior art to be easy to build-VDD with+VDD. in order to simplified characterization omits herein.
Above-mentioned explanation fully discloses embodiment of the present utility model.It is pointed out that the scope be familiar with person skilled in art and any change that embodiment of the present utility model is done all do not departed to claims of the present utility model.Correspondingly, the scope of claim of the present utility model is also not limited only to described embodiment.
Claims (7)
1. a charge pump, is characterized in that, it comprises:
First output;
Second output;
Input voltage terminal;
First intermediate connecting node;
Second intermediate connecting node;
Be connected to the first output capacitance between the first output and ground;
Be connected to the second output capacitance between the second output and ground;
Be connected to the first switch between Input voltage terminal and the first intermediate connecting node;
Be connected to the 3rd switch between the first intermediate connecting node and the first output;
Be connected to the 5th switch between the first intermediate connecting node and the second output;
Be connected to and fly electric capacity between the first intermediate connecting node and the second intermediate connecting node;
Be connected to the second switch between the second intermediate connecting node and the first output;
Be connected to the 4th switch between the second intermediate connecting node and earth terminal.
2. charge pump according to claim 1, is characterized in that,
In the first stage, the first switch and second switch conducting, rest switch ends;
In second stage, the 3rd switch and the 4th switch conduction, rest switch ends;
In the phase III, the 4th switch conduction and the 5th switch conduction, rest switch ends.
3. charge pump according to claim 2, is characterized in that,
First clock signal controls conducting or the cut-off of the first switch and second switch, when the first clock signal is significant level, and the conducting of the first switch and second switch, when the first clock signal is inactive level, the cut-off of the first switch and second switch;
The conducting of second clock signal controlling the 3rd switch or cut-off, when second clock signal is significant level, the 3rd switch conduction, when second clock signal is inactive level, the 3rd switch cut-off;
3rd clock signal controls conducting or the cut-off of the 5th switch, when the 3rd clock signal is significant level, and the 5th switch conduction, when the 3rd clock signal is inactive level, the 5th switch cut-off;
The conducting of second clock signal or the 3rd clock signal co-controlling the 4th switch or cut-off, when second clock signal or the 3rd clock signal are significant level, the 4th switch conduction, when second clock signal or the 3rd clock signal are inactive level, 4th switch cut-off
First clock signal, second clock signal and the 3rd clock signal are the not overlapping clocks of significant level.
4. charge pump according to claim 3, is characterized in that, it also comprises and also has first or door,
First clock signal is connected with the control end of second switch with the first switch;
Second clock signal is connected with the control end of the 3rd switch;
Second clock signal is also connected with the first input end of described first or door,
3rd clock signal is connected with the second input of described first or door;
3rd clock signal is also connected with the control end of the 5th switch,
Significant level is high level, and inactive level is low level.
5. charge pump according to claim 1, is characterized in that,
In the first stage, the first switch and second switch conducting, rest switch ends;
In second stage, the 3rd switch and the 4th switch conduction, rest switch ends;
In the phase III, the first switch and second switch conducting, rest switch ends;
At four-stage, the 4th switch conduction and the 5th switch conduction, rest switch ends.
6. charge pump according to claim 5, is characterized in that,
The conducting of the first clock signal and the 3rd clock signal co-controlling first switch and second switch or cut-off, when the first clock signal or the 3rd clock signal are significant level, the conducting of the first switch and second switch, when the first clock signal or the 3rd clock signal are inactive level, the cut-off of the first switch and second switch;
The conducting of second clock signal controlling the 3rd switch or cut-off, when second clock signal is significant level, the 3rd switch conduction, when second clock signal is inactive level, the 3rd switch cut-off;
4th clock signal controls conducting or the cut-off of the 5th switch, when the 4th clock signal is significant level, and the 5th switch conduction, when the 4th clock signal is inactive level, the 5th switch cut-off;
The conducting of second clock signal or the 4th clock signal co-controlling the 4th switch or cut-off, when second clock signal or the 4th clock signal are significant level, the 4th switch conduction, when second clock signal or the 4th clock signal are inactive level, 4th switch cut-off
First clock signal, second clock signal, the 3rd clock signal and the 4th clock signal are the not overlapping clocks of significant level.
7. charge pump according to claim 6, is characterized in that, it also comprises and also has first or door, second or door, the 3rd or door,
First clock signal is connected with the second input with the first input end of the 3rd or door respectively with the 3rd clock signal, the 3rd or the output of door be connected with the control end of the first switch;
Second clock signal is connected with the control end of the 3rd switch;
First clock signal is connected with the second input with the first input end of second or door respectively with the 3rd clock signal, second or the output of door be connected with the control end of second switch;
Second clock signal is connected with the second input with the first input end of first or door respectively with the 4th clock signal, first or the output of door be connected with the control end of the 4th switch;
4th clock signal is also connected with the control end of the 5th switch,
Significant level is high level, and inactive level is low level.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520834682.6U CN205123581U (en) | 2015-10-26 | 2015-10-26 | A charge pump for in G class amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520834682.6U CN205123581U (en) | 2015-10-26 | 2015-10-26 | A charge pump for in G class amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205123581U true CN205123581U (en) | 2016-03-30 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520834682.6U Withdrawn - After Issue CN205123581U (en) | 2015-10-26 | 2015-10-26 | A charge pump for in G class amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205123581U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105162321A (en) * | 2015-10-26 | 2015-12-16 | 无锡中感微电子股份有限公司 | Charge pump used in G-class amplifier |
-
2015
- 2015-10-26 CN CN201520834682.6U patent/CN205123581U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105162321A (en) * | 2015-10-26 | 2015-12-16 | 无锡中感微电子股份有限公司 | Charge pump used in G-class amplifier |
| CN105162321B (en) * | 2015-10-26 | 2017-12-12 | 无锡中感微电子股份有限公司 | For the charge pump in G class A amplifier As |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20160330 Effective date of abandoning: 20171212 |