CN103259491A - Oscillation starting circuit - Google Patents
Oscillation starting circuit Download PDFInfo
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- CN103259491A CN103259491A CN2012102132294A CN201210213229A CN103259491A CN 103259491 A CN103259491 A CN 103259491A CN 2012102132294 A CN2012102132294 A CN 2012102132294A CN 201210213229 A CN201210213229 A CN 201210213229A CN 103259491 A CN103259491 A CN 103259491A
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- 230000010355 oscillation Effects 0.000 title claims abstract description 49
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 10
- 238000010586 diagram Methods 0.000 description 10
- 229910052710 silicon Inorganic materials 0.000 description 10
- 239000010703 silicon Substances 0.000 description 10
- 230000004913 activation Effects 0.000 description 8
- 238000001994 activation Methods 0.000 description 8
- 238000005538 encapsulation Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000013078 crystal Substances 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 2
- 230000005669 field effect Effects 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 238000010977 unit operation Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000003071 parasitic effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
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- Oscillators With Electromechanical Resonators (AREA)
Abstract
本发明公开了一种起振电路包含有一起振单元以及至少一连接垫。该起振单元用来起振一可振荡元件，包含有多个开关以及一静电防护电路。该多个开关根据一控制信号来控制该起振单元在一第一操作模式与一第二操作模式之间进行切换。该静电防护电路用来提供静电防护。该连接垫，耦接于该起振单元与至少一信号处理电路，用于该起振单元操作于该第一操作模式下时，作为该起振电路的一输出端使用，以及该起振单元操作于该第二操作模式下时，作为该信号处理电路的一输入输出端使用。
The invention discloses an oscillation circuit including an oscillation unit and at least one connection pad. The oscillation unit is used to oscillate an oscillating component and includes a plurality of switches and an electrostatic protection circuit. The plurality of switches control the vibration unit to switch between a first operation mode and a second operation mode according to a control signal. The electrostatic protection circuit is used to provide electrostatic protection. The connection pad is coupled between the oscillation unit and at least one signal processing circuit, and is used as an output end of the oscillation circuit when the oscillation unit operates in the first operating mode, and the oscillation unit When operating in the second operating mode, it is used as an input and output terminal of the signal processing circuit.
Description
Technical field
Present invention is directed to the design of start-oscillation circuit, refer to start-oscillation circuit a kind of and the shared connection gasket of signal processing circuit especially.
Background technology
In traditional Design of Digital Circuit, because crystal oscillator uses different power supply, grounding path, electrostatic discharge protection circuit (electrostatic discharge with digital circuit system itself, ESD) and connection gasket (pad), so be all to be subjected to very big influence on the quantity of the coiling of size, encapsulation at silicon chip and stitch, also therefore improve cost of manufacture and the packaging cost of silicon chip.
For instance, compared to other circuit elements, because connection gasket occupies big relatively area in silicon chip, therefore in circuit design, use more many connection gaskets, will take more big silicon area, in other words, really can be used for the real silicon area of making circuit also reduces thereupon.
Therefore, a kind of design of integrating the connection gasket of crystal oscillator and digital circuit of needs is arranged, with the cost of manufacture of reduction silicon chip and the cost of encapsulation.
Summary of the invention
According to embodiments of the invention, it proposes start-oscillation circuit a kind of and the shared connection gasket of signal processing circuit, to solve the above problems.
According to embodiments of the invention, it discloses a kind of start-oscillation circuit.This start-oscillation circuit includes a starting of oscillation unit and at least one connection gasket.But this starting of oscillation unit is used for starting of oscillation one oscillating element, includes a plurality of switches and an electrostatic discharge protection circuit.These a plurality of switches are used for controlling this starting of oscillation unit according to a control signal and switch between one first operator scheme and one second operator scheme.This electrostatic discharge protection circuit is used to provide electrostatic defending.This connection gasket, be coupled to this starting of oscillation unit and at least one signal processing circuit, be used in this starting of oscillation unit operations in this first operator scheme following time, output as this start-oscillation circuit uses, and in this starting of oscillation unit operations in this second operator scheme following time, use as an input/output terminal of this signal processing circuit.
See through sharing of connection gasket, the present invention can significantly reduce silicon area, and reduces the quantity of coiling and stitch, and then reduces the cost of silicon chip production and encapsulation effectively.
Description of drawings
Fig. 1 is the schematic diagram of an embodiment of start-oscillation circuit of the present invention.
Fig. 2 is the schematic diagram of an embodiment of the signal processing circuit among Fig. 1.
Fig. 3 is the schematic diagram of one first embodiment of start-oscillation circuit collocation signal processing circuit of the present invention use.
Fig. 4 is the schematic diagram of one second embodiment of start-oscillation circuit collocation signal processing circuit of the present invention use.
Fig. 5 is the schematic diagram of one the 3rd embodiment of start-oscillation circuit collocation signal processing circuit of the present invention use.
Wherein, description of reference numerals is as follows:
100 start-oscillation circuits
110 starting of oscillation unit
112,114,116,118 switches
120 electrostatic discharge protection circuits
122 first connection gaskets
124 second connection gaskets
130,230 signal processing circuits
But 140 oscillating elements
232 logical blocks
234 receiving elements
236 buffer cells
Embodiment
Used some vocabulary to censure specific element in the middle of the claim before specification reaches.Those skilled in the art should understand, and hardware manufacturer may be called same element with different nouns.This specification and before claim be not used as distinguishing the mode of element with the difference of title, but the criterion that is used as distinguishing with the difference of element on function.In the whole text specification and before claim in the middle of mentioned " comprising " be an open term, so should be construed to " comprise but be not limited to ".In addition, " coupling " word is to comprise any indirect electrical connection means that directly reach at this.Therefore, be coupled to one second device if describe one first device in the literary composition, then represent this first device and can directly be electrically connected on this second device, or be electrically connected to this second device indirectly through other devices or connection means.
Please refer to Fig. 1, Fig. 1 is the schematic diagram of an embodiment of start-oscillation circuit of the present invention.Start-oscillation circuit 100 includes (but being not limited to) starting of oscillation unit 110 and at least one connection gasket (for example one first connection gasket 122 and one second connection gasket 124).But starting of oscillation unit 110 be starting of oscillation one oscillating element 140(for example, a quartzy device), and include (but being not limited to) a plurality of switches 112,114,116,118 and one electrostatic discharge protection circuit 120.Switch 112,114,116,118 is used for controlling starting of oscillation unit 110 according to a control signal EN and switches between one first operator scheme and one second operator scheme.Electrostatic discharge protection circuit 120 is used to provide electrostatic defending.Connection gasket (for example second connection gasket 124) is coupled to 130 of starting of oscillation unit 110 and signal processing circuits, when starting of oscillation unit 110 operates in this first operator scheme following time, output as starting of oscillation unit 110 uses, and when starting of oscillation unit 110 operates in this second operator scheme following time, an I/O end that is used as signal processing circuit 130 uses.Please note, in the present embodiment, signal processing circuit 130 is digital circuits, and switch 112,114,116,118 is the metal oxide semiconductor field effect tube switch, wherein, switch 112,114 and 116 is CMOS (Complementary Metal Oxide Semiconductor) field effect transistor (complementary MOS, CMOS) switch, switch 118 are N NMOS N-channel MOS N fet switches (NMOS), yet, only as the usefulness of example explanation, the present invention is not as limit for this.In addition, for the sake of brevity, Fig. 1 only shows a signal processing circuit 130, yet, in another embodiment, another connection gasket (for example first connection gasket 122) also can be in order to couple starting of oscillation unit 110 and another signal processing circuit (not shown), therefore, when starting of oscillation unit 110 operates in this first operator scheme following time, another output as starting of oscillation unit 110 uses, and operate in this second operator scheme following time when starting of oscillation unit 110, then the I/O end as this another signal processing circuit uses.
In the present embodiment, when switch 112 conductings, first connection gasket 122 sees through one first end points E1 and is coupled to a resistance R 1; When switch 114 conductings, resistance R 1 is coupled to a resistance R 2; And when switch 116 conductings, 2 of resistance R see through one second end points E2 and are coupled to second connection gasket 124.Furthermore, switch 112,114 and 116 has one first link N1, one second link N2, one first control end C1 and one second control end C2 respectively, and switch 118 includes one first link N1, one second link N2 and a control end C.The first link N1 of switch 112 is coupled to first connection gasket 122, and the second link N2 of switch 112 is coupled to the first end points E1, to be used for optionally connecting first connection gasket 122 and the first end points E1.The first link N1 of switch 114 is coupled between resistance R 1 and the resistance R 2, is used for optionally connecting the first end points E1 and the second end points E2.The first link N1 of switch 116 is coupled to the second end points E2, and the second link N2 of switch 116 is coupled to second connection gasket 124, is used for optionally connecting the second end points E2 and second connection gasket 124.The first link N1 of switch 118 is coupled to the first end points E1, and the second link N2 of switch 118 is coupled to one first reference voltage (for example, earthed voltage GND), is used for optionally connecting the first reference voltage GND and the first end points E1.
In addition, switch 112,114 and 116 the first control end C1 all are coupled to control signal EN, and the control end C of switch 112,114 and 116 the second control end C2 and switch 118 all is coupled to the reverse signal ENB of control signal EN.Thus, control signal EN control switch 112, switch 114 and switch 116 be for opening, and control switch 118 when closing (, control signal EN indicates unlatching, and when reverse signal ENB indication is closed), starting of oscillation unit 110 just can operate under this first operator scheme; And work as control signal EN control switch 112, switch 114 and switch 116 for closing, and when control switch 118 is unlatching (that is, control signal EN indication is closed, and reverse signal ENB indicates when opening), 110 of starting of oscillation unit can operate under this second operator scheme.
Electrostatic discharge protection circuit 120 includes a first transistor M1 and a transistor seconds M2.Transistor M1 and transistor M2 have one first link N1, one second link N2 and a control end C respectively.The first link N1 of transistor M1 is coupled to one second reference voltage (for example, supply voltage VDD), and the second link N2 of transistor M1 is coupled to the second end points E2, and the control end C of transistor M1 is coupled to the first end points E1.The first link N1 of transistor M2 is coupled to the second end points E2, and the second link N2 of transistor M2 is coupled to the first reference voltage GND, and the control end C of transistor M2 is coupled to the first end points E1.Note that electrostatic discharge protection circuit 120 need meet the standard of electrostatic defending standard on real the work, be eliminated so that the electrostatic charge in start-oscillation circuit 100 and the signal processing circuit 130 can see through the operation of electrostatic discharge protection circuit 120 charge/discharges.In addition, because electrostatic discharge protection circuit 120 is through the parasitic capacitance in the circuit (namely, be not the path that sees through signal) carry out the operation of charge/discharge, therefore, the running of the On/Off of switch 112～118 and electrostatic discharge protection circuit 120 is irrelevant, in other words, when starting of oscillation unit 110 operates in this second operator scheme following time, electrostatic discharge protection circuit 120 still can provide electrostatic defending to signal processing circuit 130.
Please refer to Fig. 2, Fig. 2 is the schematic diagram of an embodiment of signal processing circuit 130 shown in Figure 1.Signal processing circuit 230 can be in order to realizing the signal processing circuit 130 among Fig. 1, and include a logical block 232, a receiving element 234 and a buffer cell 236, and wherein buffer cell 236 is coupled to logical block 232 and receiving element 234.Logical block 232 has a control end, is used for receiving a control signal OEN, and whether activation of control logic unit 232 according to this.Receiving element 234 has a control end, is used for receiving a control signal IE, and controls whether activation of receiving element 234 according to this.Buffer cell 136 sees through second connection gasket 124 and is coupled to start-oscillation circuit 100, is used for keeping in the signal that sees through logical block 232 outputs.When control signal OEN opens logical block 232, and control signal IE is when closing receiving element 234, and this moment, signal processing circuit 230 operated in output mode.When control signal OEN closes logical block 232, and control signal IE is when opening receiving element 234, and this moment, signal processing circuit 230 operated in input pattern.Please note, control signal OEN and the control signal IE control signal EN that need suitably arrange in pairs or groups uses, for instance, when starting of oscillation unit 110 operates in this first operator scheme following time, and signal processing circuit 230 not activations (that is control signal OEN all closes corresponding logical block 232 and receiving element 234 with control signal IE); On the other hand, when starting of oscillation unit 110 operates in this second operator scheme following time, signal processing circuit 230 is operable in output mode or input pattern.Yet only as the usefulness of example explanation, the present invention is not as limit in the design of signal processing circuit 230.Spirit of the present invention is that signal processing circuit 230 can cooperate control signal EN to come activation/not activation, and to cooperate the operation of starting of oscillation unit 110, all variation and modifications of having done according to the described content of Fig. 2 all should belong to scope of the present invention.
Please refer to Fig. 3, Fig. 3 is the schematic diagram of one first embodiment of start-oscillation circuit collocation signal processing circuit of the present invention use.In Fig. 3, control signal EN can be in opening, and control signal OEN and control signal IE all are in closed condition, at this moment, starting of oscillation unit 110 operates under this first operator scheme, and signal processing circuit 230 not activations, therefore, but starting of oscillation unit 110 can be used for starting of oscillation oscillating element 140, and use is brought in the output that connection gasket (for example second connection gasket 124) is used as start-oscillation circuit 100.
Please refer to Fig. 4, Fig. 4 is the schematic diagram of one second embodiment of start-oscillation circuit collocation signal processing circuit of the present invention use.In Fig. 4, control signal OEN is in opening, and control signal EN and control signal IE all are in closed condition, at this moment, starting of oscillation unit 110 operates under this second operator scheme, and signal processing circuit 230 activations and operate in the following of output mode are used so connection gasket (for example second connection gasket 124) just is used as the signal output part of signal processing circuit 230.
Please refer to Fig. 5, Fig. 5 is the schematic diagram of one the 3rd embodiment of start-oscillation circuit collocation signal processing circuit of the present invention use.In Fig. 5, control signal IE is in opening, and control signal EN and control signal OEN all are in closed condition, at this moment, starting of oscillation unit 110 operates under this second operator scheme, and signal processing circuit 230 activations and operate in the following of input pattern are used so connection gasket (for example second connection gasket 124) just is used as the signal input part of signal processing circuit 230.
In sum, the connection gasket design of start-oscillation circuit of the present invention can make a crystal oscillator and a digital circuit share connection gasket, and then significantly reduce silicon area, and reduce the quantity of coiling and stitch, therefore can reduce the cost of silicon chip production and encapsulation effectively.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| TW101105606A TWI472158B (en) | 2012-02-21 | 2012-02-21 | Starting circuit for crystal oscillator |
| TW101105606 | 2012-02-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103259491A true CN103259491A (en) | 2013-08-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012102132294A Pending CN103259491A (en) | 2012-02-21 | 2012-06-26 | Oscillation starting circuit |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103259491A (en) |
| TW (1) | TWI472158B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113437950A (en) * | 2021-07-29 | 2021-09-24 | 广东华芯微特集成电路有限公司 | Low-power-consumption framework |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW439351B (en) * | 1999-04-26 | 2001-06-07 | Faraday Tech Corp | The universal crystal oscillation input/output circuit for enhanced charge device mode (CDM) electrostatic discharge (ESD) protection |
| US6320473B1 (en) * | 1999-09-30 | 2001-11-20 | Stmicroelectronics, Inc. | Integrated oscillator circuit apparatus with capacitive coupling for reducing start-up voltage |
| TW591888B (en) * | 2001-08-13 | 2004-06-11 | Em Microelectronic Marin Sa | Oscillator circuit with an inverter amplifier having reduced consumption |
| CN1845450A (en) * | 2005-04-07 | 2006-10-11 | 松下电器产业株式会社 | Applied voltage control circuit for voltage controlled oscillation circuit |
| US20080018515A1 (en) * | 2006-07-21 | 2008-01-24 | Microchip Technology Incorporated | Integrated Circuit Device Having at Least One Bond Pad With a Selectable Plurality of Input-Output Functionalities |
| TW201012046A (en) * | 2008-09-12 | 2010-03-16 | Phison Electronics Corp | Oscillator and driving circuit and oscillation method thereof |
| TW201106609A (en) * | 2009-08-14 | 2011-02-16 | Realtek Semiconductor Corp | Crystal oscillator |
| TW201134102A (en) * | 2010-03-31 | 2011-10-01 | Silicon Motion Inc | Osicillatting signal generatting device and related method |
-
2012
- 2012-02-21 TW TW101105606A patent/TWI472158B/en active
- 2012-06-26 CN CN2012102132294A patent/CN103259491A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW439351B (en) * | 1999-04-26 | 2001-06-07 | Faraday Tech Corp | The universal crystal oscillation input/output circuit for enhanced charge device mode (CDM) electrostatic discharge (ESD) protection |
| US6320473B1 (en) * | 1999-09-30 | 2001-11-20 | Stmicroelectronics, Inc. | Integrated oscillator circuit apparatus with capacitive coupling for reducing start-up voltage |
| TW591888B (en) * | 2001-08-13 | 2004-06-11 | Em Microelectronic Marin Sa | Oscillator circuit with an inverter amplifier having reduced consumption |
| CN1845450A (en) * | 2005-04-07 | 2006-10-11 | 松下电器产业株式会社 | Applied voltage control circuit for voltage controlled oscillation circuit |
| US20080018515A1 (en) * | 2006-07-21 | 2008-01-24 | Microchip Technology Incorporated | Integrated Circuit Device Having at Least One Bond Pad With a Selectable Plurality of Input-Output Functionalities |
| TW201012046A (en) * | 2008-09-12 | 2010-03-16 | Phison Electronics Corp | Oscillator and driving circuit and oscillation method thereof |
| TW201106609A (en) * | 2009-08-14 | 2011-02-16 | Realtek Semiconductor Corp | Crystal oscillator |
| TW201134102A (en) * | 2010-03-31 | 2011-10-01 | Silicon Motion Inc | Osicillatting signal generatting device and related method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113437950A (en) * | 2021-07-29 | 2021-09-24 | 广东华芯微特集成电路有限公司 | Low-power-consumption framework |
| CN113437950B (en) * | 2021-07-29 | 2023-12-01 | 广东华芯微特集成电路有限公司 | Low-power consumption architecture |
Also Published As
| Publication number | Publication date |
|---|---|
| TWI472158B (en) | 2015-02-01 |
| TW201336231A (en) | 2013-09-01 |
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Application publication date: 20130821 |