CN102831093A - Multiplexing circuit and multiplexing method for chip pin - Google Patents
Multiplexing circuit and multiplexing method for chip pin Download PDFInfo
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- CN102831093A CN102831093A CN2012102589115A CN201210258911A CN102831093A CN 102831093 A CN102831093 A CN 102831093A CN 2012102589115 A CN2012102589115 A CN 2012102589115A CN 201210258911 A CN201210258911 A CN 201210258911A CN 102831093 A CN102831093 A CN 102831093A
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Abstract
The invention relates to a multiplexing circuit and a multiplexing method for a chip pin. The multiplexing circuit for the chip pin comprises a direct-current signal receiving sub circuit for receiving a direct-current signal in an external signal, an alternating-current signal receiving sub circuit for receiving an alternating-current signal in the external signal, a coupling circuit which is respectively connected with the direct-current signal receiving sub circuit and the alternating-current signal receiving sub circuit, so that the received direct-current signal and the alternating-current signal are coupled, and are transmitted to a multiplexing pin. According to the embodiment provided in the invention, the same chip pin not only can receive a direct-current type signal and but also can receive an alternating-current type signal, thereby improving an utilization rate of the chip pin and reducing setting of the chip pin.
Description
The application is to be 2010.02.04 the applying date, and application number is 201010105751.1, and invention and created name is the dividing an application of former patented claim of a kind of chip pin multiplexing circuit and multiplexing method thereof.
Technical field
The present invention relates to a kind of chip pin circuit, relate to a kind of chip pin multiplexing circuit and multiplexing method thereof in particular.
Background technology
Along with developing rapidly of microelectronics and mechanics of communication, the integrated scale of chip is increasing, and the relevant chip integrated functionality is also more and more abundanter, therefore must increase the pin of drawing of chip, to connect concrete application function.For example; The design of current a lot of control chips must possess various defencive function, for example mostly; Under-voltage/overvoltage protection on the input side busbar voltage, the overcurrent protection of current transformer etc.; Therefore, in order to realize these requisite defencive functions, most control chip utilizes its different, separate pin to realize its function corresponding requirement.
In addition, for some control chip, need it can receive AC signal; Can receive direct current signal again, the chip of prior art is for these two types of input signals; Need to use different separate chip pins to realize the transmission of signal, therefore increased the number of chip pin.Further, in some more complicated control chips, often need receive a plurality of dissimilar input signals, so it possibly need also more a plurality of chip pins to realize the transmission of signal.
The design of such chip pin will inevitably cause following problem:
(1) utilization factor of chip pin is not high, and therefore the chip pin of a greater number makes the Chip Packaging cost increase relatively;
(2) number of pins is many, has not only increased the package area of chip, and makes the encapsulation of chip complicated, has increased the difficulty of Chip Packaging;
(3) on the other hand, make chip volume increase, do not meet the requirement of miniaturization, and the realization of the high power density of some chips.
Therefore, it is not high how to solve prior art chip pin utilization factor, makes that pin can be multiplexing, thereby reduces cost, and improves the integrated performance of chip, becomes the problem that industry need solve.
Summary of the invention
In view of this; The invention provides a kind of multiplexing method of chip pin and realize circuit; Solving the problem that chip pin can not be multiplexing, and can not use same pin to receive dissimilar input signals, thereby cause the lower technical matters of pin utilization factor.
For realizing above-mentioned purpose, the technical scheme below the present invention has adopted:
A kind of chip pin multiplexing circuit, it comprises at least one complexing pin, is used to receive outside direct current signal and/or AC signal, said chip pin multiplexing circuit comprises that further a direct current signal receives electronic circuit, is used for receiving the direct current signal of external signal; One AC signal receives electronic circuit, is used for receiving the AC signal of external signal; One coupled circuit; Its input end receives the output terminal electric connection of electronic circuit and said AC signal reception electronic circuit respectively with said direct current signal; After being coupled in order to the said direct current signal that will receive and said AC signal, transfer to said complexing pin through its output terminal then; One demultiplexing circuit, this demultiplexing circuit and said complexing pin electrically connect, and the AC signal that is used for said complexing pin is received separates with direct current signal, and obtains the direct current signal and the AC signal of input.
According to the described chip pin multiplexing circuit of preferred embodiment of the present invention; Said direct current signal receives between electronic circuit and the said coupled circuit and also is connected with a filtering wave by prolonging time circuit, carries out Filtering Processing in order to the direct current signal that said direct current signal is received the electronic circuit reception.
According to the described chip pin multiplexing circuit of preferred embodiment of the present invention, it is a resistance circuit that said direct current signal receives electronic circuit, and it comprises at least one resistance device.
According to the described chip pin multiplexing circuit of preferred embodiment of the present invention, it is a condenser network that said AC signal receives electronic circuit, and it comprises at least one capacitor element.
According to the described chip pin multiplexing circuit of preferred embodiment of the present invention, said filtering wave by prolonging time circuit is the device of a resistance shunt capacitance.
According to the described chip pin multiplexing circuit of preferred embodiment of the present invention, said coupled circuit further comprises a resistance circuit, comprises a resistive element at least.
According to the described chip pin multiplexing circuit of preferred embodiment of the present invention; Said demultiplexing circuit further comprises: a filtering circuit; This filtering circuit input end connects said complexing pin; In order to get access to direct current signal in direct current signal after the coupling that complexing pin is received and the AC signal sum; And a totalizer, the input end of said totalizer electrically connects the output terminal of said complexing pin and the output terminal of said wave filter simultaneously, in order to get access to AC signal direct current signal after coupling and the AC signal sum.
A kind of chip pin multiplexing method may further comprise the steps: utilize direct current signal to receive electronic circuit and receive the direct current signal in the external signal; Utilize AC signal to receive electronic circuit and receive the AC signal in the external signal; After utilizing said direct current signal that coupled circuit will receive and said AC signal to be coupled then, transfer to the said complexing pin of chip; Utilize direct current signal and AC signal sum after the coupling that a demultiplexing circuit receives said complexing pin to carry out Signal Separation, to obtain direct current signal and AC signal respectively.
Multiplexing method according to the said chip pin of preferred embodiment of the present invention can further include, and adopts filter delay circuit that direct current signal is received the direct current signal that electronic circuit receives and delays time and filtering, inputs to coupled circuit again.
Multiplexing method according to the said chip pin of preferred embodiment of the present invention; The step of utilizing direct current signal that a demultiplexing circuit receives complexing pin and AC signal sum to carry out Signal Separation; Can further include; Utilize direct current signal and AC signal sum after the coupling that the filtering circuit in the demultiplexing circuit receives complexing pin to carry out filtering, to obtain direct current signal; Utilize adder circuit in the demultiplexing circuit to receive the direct current signal that direct current signal and AC signal sum and filtering circuit after the coupling that complexing pin receives obtain then, thereby with the acquisition AC signal.
Owing to adopted above technical characterictic, made the present invention have following advantage and good effect than prior art:
The present invention utilizes the multiplex circuit of controller chip pin design; With direct current signal and AC signal coupling earlier; Transfer to complexing pin, be transferred to chip through complexing pin after, again through the chip separation circuit with the coupling Signal Separation; Obtain original direct-flow input signal and/or ac input signal, use for chip internal.Adopt multiplex circuit of the present invention and multiplexing method; Can direct current signal pin and AC signal pin effectively be combined; Realize the purpose that single pin function is multiplexing, improve the utilization factor of pin, and reduced the manufacturing cost of chip and the volume of chip.
Description of drawings
Shown in Figure 1 is theory structure block diagram according to the first example chip pin multiplexing circuit of the embodiment of the invention;
Shown in Figure 2 is theory structure block diagram according to the second example chip pin multiplexing circuit of the embodiment of the invention;
Fig. 3 is that the circuit of the second example chip multiplex circuit shown in Figure 2 is realized schematic diagram;
Fig. 4 A is depicted as the principle assumption diagram according to the 3rd example chip pin multiplexing circuit of the embodiment of the invention;
Fig. 4 B is depicted as the principle assumption diagram according to the 4th example chip pin multiplexing circuit of the embodiment of the invention;
Shown in Figure 5 is the circuit realization schematic diagram of the demultiplexing circuit of the 3rd example shown in Fig. 4 A and Fig. 4 B and the 4th example chip pin multiplexing circuit;
Fig. 6 A is depicted as the process flow diagram according to the first example chip pin multiplexing method of the embodiment of the invention;
Fig. 6 B is depicted as the process flow diagram according to the second example chip pin multiplexing method of the embodiment of the invention;
Fig. 6 C is depicted as the process flow diagram according to the 3rd example chip pin multiplexing method of the embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing several preferred embodiments of the present invention is described in detail, but the present invention is not restricted to these embodiment.The present invention contain any on marrow of the present invention and scope, make substitute, modification, equivalent method and scheme.Understand for the public is had completely the present invention, in the following preferred embodiment of the present invention, specified concrete details, and do not had the description of these details also can understand the present invention fully for a person skilled in the art.
With reference to the theory structure block diagram of the first example chip pin multiplexing circuit shown in Figure 1, wherein 104 is complexing pin, and this pin multiplexing circuit comprises that further direct current signal receives electronic circuit 101, is used for receiving the direct current signal of external signal; AC signal receives electronic circuit 102, is used for receiving the AC signal of external signal; Coupled circuit 103; Its input end receives electronic circuit 101 with said direct current signal respectively and electrically connects with the output terminal that said AC signal receives electronic circuit 102; Its output terminal is connected to complexing pin 104, be used to receive said direct current signal and AC signal and be coupled after input to chip complexing pin 104.
Theory diagram with reference to the second example chip pin multiplexing circuit shown in Figure 2; Be that with the difference of embodiment one present embodiment receives between electronic circuit 101 and the coupled circuit 103 at direct current signal, the filtering wave by prolonging time circuit 205 of having connected; With to the direct current signal after rectification; Further filtering, the filtering burr signal is more stablized level and smooth direct current signal to obtain.
Shown in Figure 3 is that the circuit of chip pin multiplexing circuit structure block diagram shown in Figure 2 is realized schematic diagram.Wherein the resistance pressure-dividing network of first resistance 301 and second resistance, 302 compositions is realized the dividing potential drop ratio of direct current signal is gathered and transmission; Second electric capacity 305 and 302 parallel connections of second resistance are delayed time and Filtering Processing with the transmission to the direct current signal that collects.The coupled transfer that first electric capacity 304 is realized AC signal; The 3rd resistance 303 is coupled direct current signal that collects and AC signal, and inputs to complexing pin 104.
With reference to figure 4A, be depicted as theory diagram according to the 3rd example chip pin multiplexing circuit of the present invention,
The difference of the pin multiplexing circuit of itself and first example is; Complexing pin 104 demultiplexing circuit 405 of further having connected; Said demultiplexing circuit and said complexing pin electrically connect; The AC signal that is used for said complexing pin is received separates with direct current signal, and obtains the direct current signal and the AC signal of input respectively.
With reference to figure 4B; Improvement for corresponding second example; And the difference of second example is to receive between the signal end at complexing pin 104 and chip, the demultiplexing circuit 405 of further having connected again, and this demultiplexing circuit and said complexing pin electrically connect; The AC signal that is used for said complexing pin is received separates with direct current signal, and obtains the direct current signal and the AC signal of input.
Shown in Figure 5 is that a physical circuit of the demultiplexing circuit shown in Fig. 4 A and Fig. 4 B is realized figure, and wherein, direct current signal and AC signal sum after the coupling that wave filter 501 receives complexing pin 105 are carried out Filtering Processing, thereby obtain said direct current signal; Totalizer 502 is connected with the output of said complexing pin and said filtering circuit respectively; Carry out computing in order to the direct current signal after the coupling that will receive and AC signal sum and the direct current signal that obtains by said filtering circuit, thereby to obtain said AC signal.
With reference to figure 6A,, may further comprise the steps according to the first example chip pin multiplexing method of the present invention:
S601: receive electronic circuit through direct current signal and receive direct current signal (S601-1), receive electronic circuit through AC signal and receive AC signal (S601-2);
S603: coupled circuit receives direct current signal and AC signal and is coupled, and transfers to the chip complexing pin then;
Wherein between step S601 and the S603, can further include through filter delay circuit the direct current signal that receives is carried out the filtering delay-time processing, and input to coupled circuit (S602).
With reference to figure 6B, according to the second example chip pin multiplexing method of the present invention, compare with the first example chip pin multiplexing method, can further include:
S604: direct current signal and AC signal sum after the coupling that the chip complexing pin is received through demultiplexing circuit are carried out signal separation process, to obtain said direct current signal and AC signal respectively.
With reference to figure 6C, the signal separation process in the second example chip pin multiplexing method further comprises step:
S604-1: direct current signal and AC signal sum after the coupling that the chip complexing pin is received through the wave filter in the demultiplexing circuit are carried out filtering to obtain direct current signal;
S604-2: the totalizer in the demultiplexing circuit receives the direct current signal through the direct current signal after the coupling of complexing pin input and AC signal sum and wave filter output, to obtain AC signal
Step S604-1 and S604-2 can carry out simultaneously, also can have only wherein a certain as required, also do not need to possess fully simultaneously.
In sum; Multiplexing method according to disclosed multiplex circuit that utilizes the controller chip pin design of the present invention and corresponding pin is coupled direct current signal and AC signal earlier, transfers to complexing pin; After being transferred to chip through complexing pin; Through the Signal Separation of chip separation circuit, obtain original direct-flow input signal and/or ac input signal again, use for chip internal with coupling.Adopt multiplex circuit of the present invention and multiplexing method; Can direct current signal pin and AC signal pin effectively be combined; Realize the purpose that single pin function is multiplexing, improve the utilization factor of pin, and reduced the manufacturing cost of chip and the volume of chip.
In addition; Instruction according to the above embodiment of the present invention is for some more complicated control chips, when it need receive a plurality of dissimilar input signals; Can realize that single pin carries out the transmission of a plurality of signals through above-mentioned multiplex circuit and multiplexing method equally among the present invention; Therefore, the present invention is for the control chip of complicacy, be very beneficial for the high density of chip integrated with the reducing of cost.
More than chip pin multiplexing circuit and multiplexing method thereof according to the preferred embodiments of the present invention have been carried out detailed description, those of ordinary skills can know other technologies or structure and circuit layout, element etc. in view of the above by inference and all can be applicable to said embodiment.
As indicated above according to embodiments of the invention, these embodiment do not have all details of detailed descriptionthe, do not limit this invention yet and are merely described specific embodiment.Obviously, according to above description, can do a lot of modifications and variation.These embodiment are chosen and specifically described to this instructions, is in order to explain principle of the present invention and practical application better, thereby person skilled can utilize the present invention and the modification on basis of the present invention to use well under making.The present invention only receives the restriction of claims and four corner and equivalent.
Claims (10)
1. chip pin multiplexing circuit, it comprises at least one complexing pin, is used to receive outside direct current signal and/or AC signal, it is characterized in that, said chip pin multiplexing circuit further comprises,
One direct current signal receives electronic circuit, is used for receiving the direct current signal of external signal;
One AC signal receives electronic circuit, is used for receiving the AC signal of external signal;
One coupled circuit; Its input end receives the output terminal electric connection of electronic circuit and said AC signal reception electronic circuit respectively with said direct current signal; After being coupled in order to the said direct current signal that will receive and said AC signal, transfer to said complexing pin through its output terminal then;
Demultiplexing circuit, it is connected with said complexing pin, separates with AC signal in order to the direct current signal that said complexing pin is received, to obtain the direct current signal and the AC signal of input respectively.
2. chip pin multiplexing circuit according to claim 1 is characterized in that, said direct current signal receives the electronic circuit resistance circuit that at least one resistance forms of can serving as reasons.
3. chip pin multiplexing circuit according to claim 1 is characterized in that, said AC signal receives electronic circuit and comprises a condenser network.
4. chip pin multiplexing circuit according to claim 1 is characterized in that said coupled circuit comprises a resistance circuit.
5. arbitrary chip pin multiplexing circuit according to claim 1 is characterized in that, said direct current signal receives between electronic circuit and the coupled circuit and may further include a filtering wave by prolonging time circuit.
6. chip pin multiplexing circuit according to claim 5 is characterized in that, said filtering wave by prolonging time circuit comprises a condenser network.
7. chip pin multiplexing circuit according to claim 1 is characterized in that, said demultiplexing circuit further comprises,
Filtering circuit, it is connected with said complexing pin, in order to the direct current signal and the AC signal sum that receive are carried out filtering, to obtain direct current signal;
Adder circuit, it is connected with the output of said complexing pin and said filtering circuit respectively, in order to the direct current signal that receives and AC signal sum and the direct current signal that obtained by said filtering circuit are carried out computing, thereby to obtain AC signal.
8. chip pin multiplexing method may further comprise the steps:
Utilize direct current signal to receive electronic circuit and receive the direct current signal in the external signal;
Utilize AC signal to receive electronic circuit and receive the AC signal in the external signal;
After utilizing said direct current signal that coupled circuit will receive and said AC signal to be coupled, transfer to the said complexing pin of chip then;
Utilize a demultiplexing circuit to direct current signal and AC signal sum that complexing pin receives, carry out Signal Separation, to obtain direct current signal and AC signal respectively.
9. chip pin multiplexing method according to claim 8 is characterized in that, further comprises, adopts filter delay circuit that the direct current signal that direct current signal reception electronic circuit receives is delayed time and filtering.
10. chip pin multiplexing method according to claim 8 is characterized in that, the step of utilizing direct current signal that a demultiplexing circuit receives complexing pin and AC signal sum to carry out Signal Separation further comprises,
Utilize direct current signal and AC signal sum after the coupling that the filtering circuit in the demultiplexing circuit receives complexing pin to carry out filtering, to obtain direct current signal;
Utilize adder circuit in the demultiplexing circuit to receive the direct current signal that direct current signal and AC signal sum and filtering circuit after the coupling that complexing pin receives obtain, with the acquisition AC signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012102589115A CN102831093A (en) | 2010-02-04 | 2010-02-04 | Multiplexing circuit and multiplexing method for chip pin |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2012102589115A CN102831093A (en) | 2010-02-04 | 2010-02-04 | Multiplexing circuit and multiplexing method for chip pin |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201010105751A Division CN101807176A (en) | 2010-02-04 | 2010-02-04 | Chip pin multiplexing circuit and multiplexing method thereof |
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| CN102831093A true CN102831093A (en) | 2012-12-19 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107340414A (en) * | 2017-07-28 | 2017-11-10 | 无锡思泰迪半导体有限公司 | A kind of pin multiplexing method and system applied to current sensor chip |
| CN107389994A (en) * | 2017-07-28 | 2017-11-24 | 无锡思泰迪半导体有限公司 | A kind of configurable pin multiplexing method and system applied to current sensor chip |
| CN112290929A (en) * | 2020-10-20 | 2021-01-29 | 上海爻火微电子有限公司 | Signal transmission circuit and electronic equipment |
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| US20070090778A1 (en) * | 2003-05-26 | 2007-04-26 | Koninklije Philips Electronics N.V. | Signal processing |
| CN1960224A (en) * | 2005-10-31 | 2007-05-09 | 中兴通讯股份有限公司 | Signal multiplexing and demultiplexing device |
| CN201075866Y (en) * | 2007-09-28 | 2008-06-18 | 华为技术有限公司 | Signal multiplexing transmission system |
| CN201369721Y (en) * | 2009-03-12 | 2009-12-23 | 中国船舶重工集团公司第七一五研究所 | Signal composite transmission system |
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| US20070090778A1 (en) * | 2003-05-26 | 2007-04-26 | Koninklije Philips Electronics N.V. | Signal processing |
| CN1960224A (en) * | 2005-10-31 | 2007-05-09 | 中兴通讯股份有限公司 | Signal multiplexing and demultiplexing device |
| CN201075866Y (en) * | 2007-09-28 | 2008-06-18 | 华为技术有限公司 | Signal multiplexing transmission system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107340414A (en) * | 2017-07-28 | 2017-11-10 | 无锡思泰迪半导体有限公司 | A kind of pin multiplexing method and system applied to current sensor chip |
| CN107389994A (en) * | 2017-07-28 | 2017-11-24 | 无锡思泰迪半导体有限公司 | A kind of configurable pin multiplexing method and system applied to current sensor chip |
| CN107389994B (en) * | 2017-07-28 | 2023-08-22 | 杭州思泰微电子有限公司 | Configurable pin multiplexing method and system applied to current sensor chip |
| CN107340414B (en) * | 2017-07-28 | 2024-02-13 | 杭州思泰微电子有限公司 | Pin multiplexing method and system applied to current sensor chip |
| CN112290929A (en) * | 2020-10-20 | 2021-01-29 | 上海爻火微电子有限公司 | Signal transmission circuit and electronic equipment |
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Application publication date: 20121219 |