CN101262212B - Ranking mode of electronic part and voltage control oscillator - Google Patents
Ranking mode of electronic part and voltage control oscillator Download PDFInfo
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- CN101262212B CN101262212B CN2007100865020A CN200710086502A CN101262212B CN 101262212 B CN101262212 B CN 101262212B CN 2007100865020 A CN2007100865020 A CN 2007100865020A CN 200710086502 A CN200710086502 A CN 200710086502A CN 101262212 B CN101262212 B CN 101262212B
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Abstract
The invention discloses a pattern of arrangement of an electronic element and a voltage-controlled oscillator and particularly relates to a pattern of arrangement of an electronic element. The pattern of arrangement is applicable to the arrangement of N electronic elements, wherein, N is an odd number and the N electronic elements comprise a first group of electronic elements and a second group of electronic elements; the first group of electronic elements is arranged according to a first predetermined mode while the second group of electronic elements is arranged according to a second predetermined mode and the second group of electronic elements is adjacent to the first group of electronic elements. The pattern of arrangement of the electronic element and the voltage-controlled oscillator provided by the invention can ensure that the voltage-controlled oscillator can correctly control the output phase difference so as to achieve the even phase deviation among stages of the whole voltage-controlled oscillator.
Description
Technical field
The present invention is the arrangement mode that is relevant to a kind of electronic component, refers to a kind of arrangement mode of integrated circuit layout of electronic component especially.
Background technology
General voltage-controlled oscillator (Voltage Controlled Oscillator, VCO) main is its working spindle with the framework with odd number inverter, utilize each inverter institute palpus time of delay and constitute its waveform, when if N level inverter is arranged, then the cycle is 2N * tp (transmission delay, propagation-delay), frequency of oscillation is 1/ (2N * tp), its inverter of voltage control that utilizes input to import produces an output frequency in its output after carrying out the internal frequency vibration.
See also Fig. 1, Fig. 1 is integrated circuit layout (Layout) schematic diagram of multistage inverter in the known voltage control generator.As shown in Figure 1, Fig. 1 lifts the known voltage control generator to include seven grades of inverters 121～127 and be example, and seven grades of inverters 121～127th are docile and obedient preface and are arranged, and is arranged to the 7th inverter 127 by first inverter 121, second inverter 122.......And each inverter 121～127 all comprises an input (1211 in seven grades of inverters 121～127,1221......1271) and an output (1212,1222......1272), the connected mode of its circuit is coupled to the input 1221 of second inverter 122 in regular turn by the output 1212 of first inverter 121, the output 1262 that the output 1222 of second inverter 122 is coupled to the 6th inverter 126 of input 1231...... of the 3rd inverter 123 is coupled to the input 1271 of the 7th inverter 127, the last input 1211 that again output 1272 of the 7th inverter 127 is coupled to first inverter 121 is to finish the function that whole voltage-controlled oscillator carries out hunting of frequency.
Because, wiring effect between integrated circuit layout inner member and element can produce parasitic capacitance and resistance, further have influence on the characteristic of electronic installation, for example resistance and capacitance characteristic, as shown in Figure 1, the output 1272 of the 7th inverter 127 is coupled to input 1211 this section Route Length of first inverter 121, promptly obvious length greater than All other routes, the dead resistance that input 1211 this section circuits that this kind situation can make the output 1272 of the 7th inverter 127 be coupled to first inverter 121 are produced can't be equal to the resistance value of the dead resistance that is produced between other any two electronic components, causes phase deviation and makes the different problem of signal delay (delay) of each grade inverter.Therefore when voltage-controlled oscillator contains multistage inverter, owing to the output characteristic of multistage inverter can be because the different differences that exist of the arrangement mode of its integrated circuit layout, and then can have influence on the characteristic of whole voltage-controlled oscillator and produce phase difference difference and frequency shift (FS), therefore how to improve voltage-controlled oscillator because use multistage inverter to carry out hunting of frequency on the integrated circuit layout because the configuration of circuit produces the different problem of phase difference between signal, promptly become the stable important topic of output frequency of improving voltage-controlled oscillator.
Summary of the invention
Therefore, one of purpose of the present invention is to provide a kind of arrangement mode of electronic component, can improve that the wiring of integrated circuit layout does not in the past match and the problem that produces the characteristic deviation of electronic component.
The present invention discloses a kind of electronic component, include N electronic component, N is an odd number, wherein this N electronic component is to comprise one first group of electronic component and one second group of electronic component, this first group of electronic component is to arrange according to one first predetermined way, and its second group of electronic component is to arrange according to one second predetermined way, and wherein this second group of electronic component is adjacent to this first group of electronic component.Wherein this first predetermined way is that this first group of electronic component extremely arranged to N electronic component greatly by little according to the odd number order from the 1st electronic component, and this second predetermined way is that this second set of pieces is extremely arranged to N-1 electronic component greatly by little according to the even number order from the 2nd electronic component.
The invention provides a kind of arrangement mode of electronic component, it is the arrangement that is applicable to N the electronic component that constitutes voltage-controlled oscillator, N is an odd number, wherein this N electronic component is to comprise one first group of electronic component and one second group of electronic component, above-mentioned arrangement mode comprises: according to one first predetermined way, this first group of electronic component arranged; According to one second predetermined way, this second group of electronic component arranged, wherein this second group of electronic component is adjacent to this first group of electronic component, wherein a signal passes through this N electronic component in regular turn from the order of the past N electronic component of one the 1st electronic component, wherein this first group of electronic component comprises the electronic component of odd number order in this N electronic component, and this second group of electronic component comprises the electronic component of even number order in this N electronic component, wherein this first predetermined way is that this first group of electronic component extremely arranged to this N electronic component greatly by little in regular turn from the 1st electronic component, and this second predetermined way is that this second set of pieces is extremely arranged to a N-1 electronic component greatly by little in regular turn from one the 2nd electronic component.
The arrangement mode of electronic component of the present invention, wherein each electronic component all comprises an input and an output in this N electronic component, the input of the n electronic component in this N electronic component is to be coupled to a n-1 output that electronic component produced, 1≤n≤N wherein, n is a positive integer, and the input of the 1st electronic component is the output that is coupled to N electronic component.
The arrangement mode of electronic component of the present invention, wherein each electronic component includes in this N electronic component: a first transistor, its source electrode is coupled to a voltage source, and its grid is in order to receive one first reference voltage; One transistor seconds, its drain electrode is coupled to the drain electrode of this first transistor, and its grid is in order to receive one second reference voltage, and its source electrode is coupled to an earth terminal; And a switch element, be coupled between the drain electrode of the drain electrode of this first transistor and this transistor seconds, in order to receive a control signal and, to produce an output signal according to this first reference voltage, second reference voltage and this control signal.
The arrangement mode of electronic component of the present invention, n this control signal that electronic component received in this N electronic component is a n-1 this output signal that electronic component produced, 1≤n≤N, n is a positive integer, and the 1st this control signal that electronic component received is N this output signal that electronic component produced.
The arrangement mode of electronic component of the present invention, wherein this first transistor is a PMOS transistor, and this transistor seconds is a nmos pass transistor.
The arrangement mode of electronic component of the present invention, wherein this switch element comprises: a PMOS switch is coupled to the drain electrode of this first transistor; One nmos switch is coupled between the drain electrode of this PMOS switch and this transistor seconds; One input is coupled between the grid of the grid of this PMOS switch and this nmos switch, in order to receive this control signal; And an output, be coupled between the drain electrode of the drain electrode of this PMOS switch and this nmos switch, in order to produce this output signal according to this first reference voltage, second reference voltage and this control signal.
The arrangement mode of electronic component of the present invention, wherein each electronic component is delay (delay) element in this N electronic component.
The arrangement mode of electronic component of the present invention, wherein each electronic component is an inverter in this N electronic component.
The arrangement mode of electronic component of the present invention, wherein the arrangement mode of this electronic component is to be applicable to an integrated circuit layout.
The present invention discloses a kind of voltage-controlled oscillator in addition, and it comprises: N electronic component.N electronic component, N are an odd number, and this N electronic component is coupled to a voltage source, in order to produce an output signal according to one first reference voltage, one second reference voltage and a control signal; Wherein this N electronic component is to comprise one first group of electronic component and one second group of electronic component, this first group of electronic component is to arrange according to one first predetermined way, and its second group of electronic component is to arrange according to one second predetermined way, wherein this second group of electronic component is adjacent to this first group of electronic component, wherein a signal passes through this N electronic component in regular turn from the order of the past N electronic component of one the 1st electronic component, wherein this first group of electronic component comprises the electronic component of odd number order in this N electronic component, and this second group of electronic component comprises the electronic component of even number order in this N electronic component, wherein this first predetermined way is that this first group of electronic component extremely arranged to this N electronic component greatly by little in regular turn from the 1st electronic component, and this second predetermined way is that this second set of pieces is extremely arranged to a N-1 electronic component greatly by little in regular turn from one the 2nd electronic component.
Voltage-controlled oscillator of the present invention, wherein each electronic component all comprises an input and an output in this N electronic component, the input of the n electronic component in this N electronic component is to be coupled to a n-1 output that electronic component produced, 1≤n≤N wherein, n is a positive integer, and the input of the 1st electronic component is the output that is coupled to N electronic component.
Voltage-controlled oscillator of the present invention, wherein each electronic component includes in this N electronic component: a first transistor, its source electrode is coupled to this voltage source, and its grid is in order to receive one first reference voltage; One transistor seconds, its drain electrode is coupled to the drain electrode of this first transistor, and its grid is in order to receive one second reference voltage, and its source electrode is coupled to an earth terminal; And a switch element, be coupled between the drain electrode of the drain electrode of this first transistor and this transistor seconds, in order to receive this control signal and, to produce an output signal according to this first reference voltage, second reference voltage and this control signal.
Voltage-controlled oscillator of the present invention, n this control signal that electronic component received in this N electronic component is a n-1 this output signal that electronic component produced, 1≤n≤N, n is a positive integer, and the 1st this control signal that electronic component received is N this output signal that electronic component produced.
Voltage-controlled oscillator of the present invention, wherein this first transistor is a PMOS transistor, and this transistor seconds is a nmos pass transistor.
Voltage-controlled oscillator of the present invention, wherein this switch element comprises: a PMOS switch is coupled to the drain electrode of this first transistor; One nmos switch is coupled between the drain electrode of this PMOS switch and this transistor seconds; One input is coupled between the grid of the grid of this PMOS switch and this nmos switch, in order to receive this control signal; And an output, be coupled between the drain electrode of the drain electrode of this PMOS switch and this nmos switch, in order to produce this output signal according to this first reference voltage, second reference voltage and this control signal.
Voltage-controlled oscillator of the present invention, wherein each electronic component is delay (delay) element in this N electronic component.
Voltage-controlled oscillator of the present invention, wherein each electronic component is an inverter in this N electronic component.
The arrangement mode of electronic component of the present invention and voltage-controlled oscillator can make voltage-controlled oscillator accurately control phase difference output, reach the even phase deviation between whole voltage-controlled oscillator level and the level.
Description of drawings
Fig. 1 is the integrated circuit layout schematic diagram of multistage inverter in the known voltage control generator.
Fig. 2 is the schematic diagram of the arrangement mode of electronic component of the present invention.
Fig. 3 is the schematic diagram of each electronic component in the arrangement mode of electronic component of the present invention.
Fig. 4 arranges the schematic diagram of the voltage-controlled oscillator of mode for using electronic component of the present invention.
Embodiment
For above-mentioned and other purposes, feature and advantage of the present invention can be become apparent, cited below particularlyly go out preferred embodiment, and cooperate appended graphic elaborating.
The present invention is a kind of arrangement mode of electronic component, and it is the arrangement that is applicable to N electronic component, and N is an odd number.See also Fig. 2 and Fig. 3, Fig. 2 is the schematic diagram of the arrangement mode of electronic component of the present invention.Fig. 3 is the schematic diagram of each electronic component in the arrangement mode of electronic component of the present invention.As shown in Figure 2, be to be example in present embodiment, that is have 7 electronic components 211～217 for N=7.These 7 electronic components 211～217th comprise one first group of electronic component 10 and one second group of electronic component 20, this first group of electronic component 10 is to arrange according to one first predetermined way, its second group of electronic component 20 then foundation one second predetermined way arranged, wherein first group of electronic component 10 is to include 7 odd electron elements (211 in the electronic component 211～217,213,215,217), and second group of electronic component 20 is to include 7 even number electronic components (212 in the electronic component 211～217,214,216), this second group of electronic component 20 is adjacent to this first group of electronic component 10.First predetermined way is that first group of electronic component 10 extremely arranged to the 7th electronic component 217 greatly by little according to the odd number order from the 1st electronic component 211, and second predetermined way is that second set of pieces 20 is extremely arranged to the 6th electronic component 216 greatly by little according to the even number order from the 2nd electronic component 212.
Each electronic component all has an input (2111,2121......2171) and an output (2112,2122......2172) in 7 electronic components 211～217, be respectively coupled to two electronic components in addition in 7 electronic components 211～217, the input of the n electronic component in these 7 electronic components 211～217 is to be coupled to a n-1 output that electronic component produced, 1≤n≤N wherein, n is a positive integer, and the input 2111 of the 1st electronic component 211 is the outputs 2172 that are coupled to N electronic component 217.The arrangement mode of electronic component 211～217 of the present invention is to be applicable in the integrated circuit layout.
N this control signal that electronic component received in 7 electronic components 211～217 is this n-1 this output signal that electronic component produced, 1≤n≤7 wherein, n is a positive integer, and the 1st this output signal that this control signal that electronic component 211 received is this N electronic component, act n=7 is an example, and the 1st this control signal that electronic component 211 is received in the 7th electronic component 211～217 is the 7th this output signal that electronic component 217 is produced.
As shown in Figure 3, each electronic component 30 includes a voltage source V dd, a first transistor 32, a transistor seconds 34 and a switch element 36 in N electronic component.In present embodiment, the first transistor 32 is a PMOS transistor, and transistor seconds 34 is a nmos pass transistor.The first transistor 32 its source electrodes are coupled to this voltage source V dd, and its grid is in order to receive one first reference voltage V
1Transistor seconds 34 its drain electrodes are coupled to this switch element 36, and its grid is in order to receive one second reference voltage V
2, its source electrode is coupled to an earth terminal 38.
Switch element 36 is coupled between the drain electrode of the drain electrode of this first transistor 32 and this transistor seconds 34, in order to receive a control signal S
1And according to this first reference voltage V
1, the second reference voltage V
2And this control signal S
1, produce an output signal S
2Wherein this switch element 36 comprises a PMOS switch 362, a nmos switch 364, an input 366 and an output 368.PMOS switch 362 is coupled to the drain electrode of this first transistor 32.Nmos switch 364 is coupled between the drain electrode of this PMOS switch 362 and this transistor seconds 34.Input 366 is coupled between the grid of the grid of this PMOS switch 362 and this nmos switch 364, in order to receive this control signal.Output 368 is coupled between the drain electrode of the drain electrode of PMOS switch 362 and this nmos switch 364, in order to according to this first reference voltage V
1, the second reference voltage V
2And this control signal S
1Produce this output signal S
2
In an embodiment, each electronic component is delay (delay) element.In another embodiment, each electronic component is an inverter.
See also Fig. 2 and Fig. 4, Fig. 4 arranges the schematic diagram of the voltage-controlled oscillator of mode for using electronic component of the present invention.As shown in Figure 4, the present invention provides the voltage-controlled oscillator of a kind of N of including electronic component 44 in addition.N electronic component 44, N are an odd number, and this N electronic component is coupled to a voltage source V dd, and this N electronic component is in order to according to this first reference voltage V
1, this second reference voltage V
2An and control signal S
1Produce an output signal S
2Wherein this N electronic component is to comprise one first group of electronic component 10 and one second group of electronic component 20, this first group of electronic component 10 is to arrange according to one first predetermined way, and its second group of electronic component 20 is to arrange according to one second predetermined way, and wherein this second group of electronic component 20 is adjacent to this first group of electronic component 10.Wherein each electronic component 44 is because the wiring effect can produce dead resistance R
1～R
NAnd parasitic capacitance C
1～C
N, and that the arrangement mode of N electronic component 44 (as shown in Figure 2) can make the resistance of each dead resistance R1～RN level off to is equal.
As previously mentioned, the arrangement mode of electronic component of the present invention and the voltage-controlled oscillator of using it, utilize specific putting in order to carry out the arrangement between the electronic component in the integrated circuit layout, can make the resistance value of dead resistance and parasitic capacitance level off to equal, can effectively reduce the problem of the characteristic deviation of the tactic electronic component generation of foundation in the past whereby, the coupling of resistance and capacitance characteristic when improving multistage electronic component wiring, make the circuit of application more accurate, in addition, the arrangement mode of electronic component of the present invention is applied in the arrangement of the multistage inverter of voltage-controlled oscillator, can make the resistance of the dead resistance of each grade inverter level off to equal, the signal delay (delay) of each grade inverter is equated, and the different problem of phase difference between signal can not take place, can make voltage-controlled oscillator accurately control phase difference output whereby, reach the even phase deviation between whole voltage-controlled oscillator level and the level.
The above only is preferred embodiment of the present invention, and all equalizations of doing according to claim of the present invention change and modify, and all should belong to covering scope of the present invention.
Being simply described as follows of symbol in the accompanying drawing:
121～127: inverter
10: the first groups of electronic components
20: the second groups of electronic components
30,44,211～127: electronic component
32: the first transistor
34: transistor seconds
The 362:PMOS switch
The 364:NMOS switch
366: input
368: output
S1: control signal
S2: output signal
V1: first reference voltage
V2: second reference voltage
R1～RN: dead resistance
C1～CN: parasitic capacitance
GND: earth terminal
1211、1221......1271：
2111,2121......2171: input
1212、1222......1272：
2112,2122......2172: output
Claims (17)
1. the aligning method of an electronic component, it is characterized in that it is the arrangement that is applicable to N the electronic component that constitutes voltage-controlled oscillator, N is an odd number, wherein this N electronic component is to comprise one first group of electronic component and one second group of electronic component, and above-mentioned aligning method comprises:
According to one first predetermined way, this first group of electronic component arranged; And
According to one second predetermined way, this second group of electronic component arranged,
Wherein this second group of electronic component is adjacent to this first group of electronic component,
Wherein a signal passes through this N electronic component in regular turn from the order of the past N electronic component of one the 1st electronic component,
Wherein this first group of electronic component comprises the electronic component of odd number order in this N electronic component, and this second group of electronic component comprises the electronic component of even number order in this N electronic component,
Wherein this first predetermined way is that this first group of electronic component extremely arranged to this N electronic component greatly by little in regular turn from the 1st electronic component, and this second predetermined way is that this second set of pieces is extremely arranged to a N-1 electronic component greatly by little in regular turn from one the 2nd electronic component.
2. the aligning method of electronic component according to claim 1, it is characterized in that, each electronic component all comprises an input and an output in this N electronic component, the input of the n electronic component in this N electronic component is to be coupled to a n-1 output that electronic component produced, 1≤n≤N wherein, n is a positive integer, and the input of the 1st electronic component is the output that is coupled to N electronic component.
3. the aligning method of electronic component according to claim 1 is characterized in that, each electronic component includes in this N electronic component:
One the first transistor, its source electrode is coupled to a voltage source, and its grid is in order to receive one first reference voltage;
One transistor seconds, its drain electrode is coupled to the drain electrode of this first transistor, and its grid is in order to receive one second reference voltage, and its source electrode is coupled to an earth terminal; And
One switch element is coupled between the drain electrode of the drain electrode of this first transistor and this transistor seconds, in order to receive a control signal and according to this first reference voltage, second reference voltage and this control signal, to produce an output signal.
4. the aligning method of electronic component according to claim 3, it is characterized in that, n this control signal that electronic component received in this N electronic component is a n-1 this output signal that electronic component produced, 1≤n≤N, n is a positive integer, and the 1st this control signal that electronic component received is N this output signal that electronic component produced.
5. the aligning method of electronic component according to claim 3 is characterized in that, this first transistor is a PMOS transistor, and this transistor seconds is a nmos pass transistor.
6. the aligning method of electronic component according to claim 5 is characterized in that, this switch element comprises:
One PMOS switch is coupled to the drain electrode of this first transistor;
One nmos switch is coupled between the drain electrode of this PMOS switch and this transistor seconds;
One input is coupled between the grid of the grid of this PMOS switch and this nmos switch, in order to receive this control signal; And
One output is coupled between the drain electrode of the drain electrode of this PMOS switch and this nmos switch, in order to produce this output signal according to this first reference voltage, second reference voltage and this control signal.
7. the aligning method of electronic component according to claim 1 is characterized in that, each electronic component is a delay element in this N electronic component.
8. the aligning method of electronic component according to claim 1 is characterized in that, each electronic component is an inverter in this N electronic component.
9. the aligning method of electronic component according to claim 1 is characterized in that, the aligning method of this electronic component is to be applicable to an integrated circuit layout.
10. voltage-controlled oscillator is characterized in that it comprises:
N electronic component, N are an odd number, and this N electronic component is coupled to a voltage source, in order to produce an output signal according to one first reference voltage, one second reference voltage and a control signal; Wherein this N electronic component is to comprise one first group of electronic component and one second group of electronic component, this first group of electronic component is to arrange according to one first predetermined way, and its second group of electronic component is to arrange according to one second predetermined way, wherein this second group of electronic component is adjacent to this first group of electronic component
Wherein a signal passes through this N electronic component in regular turn from the order of the past N electronic component of one the 1st electronic component,
Wherein this first group of electronic component comprises the electronic component of odd number order in this N electronic component, and this second group of electronic component comprises the electronic component of even number order in this N electronic component,
Wherein this first predetermined way is that this first group of electronic component extremely arranged to this N electronic component greatly by little in regular turn from the 1st electronic component, and this second predetermined way is that this second set of pieces is extremely arranged to a N-1 electronic component greatly by little in regular turn from one the 2nd electronic component.
11. voltage-controlled oscillator according to claim 10, it is characterized in that, each electronic component all comprises an input and an output in this N electronic component, the input of the n electronic component in this N electronic component is to be coupled to a n-1 output that electronic component produced, 1≤n≤N wherein, n is a positive integer, and the input of the 1st electronic component is the output that is coupled to N electronic component.
12. voltage-controlled oscillator according to claim 10 is characterized in that, each electronic component includes in this N electronic component:
One the first transistor, its source electrode is coupled to this voltage source, and its grid is in order to receive one first reference voltage;
One transistor seconds, its drain electrode is coupled to the drain electrode of this first transistor, and its grid is in order to receive one second reference voltage, and its source electrode is coupled to an earth terminal; And
One switch element is coupled between the drain electrode of the drain electrode of this first transistor and this transistor seconds, in order to receive this control signal and according to this first reference voltage, second reference voltage and this control signal, to produce an output signal.
13. voltage-controlled oscillator according to claim 12, it is characterized in that, n this control signal that electronic component received in this N electronic component is a n-1 this output signal that electronic component produced, 1≤n≤N, n is a positive integer, and the 1st this control signal that electronic component received is N this output signal that electronic component produced.
14. voltage-controlled oscillator according to claim 12 is characterized in that, this first transistor is a PMOS transistor, and this transistor seconds is a nmos pass transistor.
15. voltage-controlled oscillator according to claim 14 is characterized in that, this switch element comprises:
One PMOS switch is coupled to the drain electrode of this first transistor;
One nmos switch is coupled between the drain electrode of this PMOS switch and this transistor seconds;
One input is coupled between the grid of the grid of this PMOS switch and this nmos switch, in order to receive this control signal; And
One output is coupled between the drain electrode of the drain electrode of this PMOS switch and this nmos switch, in order to produce this output signal according to this first reference voltage, second reference voltage and this control signal.
16. voltage-controlled oscillator according to claim 10 is characterized in that, each electronic component is a delay element in this N electronic component.
17. voltage-controlled oscillator according to claim 10 is characterized in that, each electronic component is an inverter in this N electronic component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100865020A CN101262212B (en) | 2007-03-09 | 2007-03-09 | Ranking mode of electronic part and voltage control oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100865020A CN101262212B (en) | 2007-03-09 | 2007-03-09 | Ranking mode of electronic part and voltage control oscillator |
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| Publication Number | Publication Date |
|---|---|
| CN101262212A CN101262212A (en) | 2008-09-10 |
| CN101262212B true CN101262212B (en) | 2011-10-19 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1131842A (en) * | 1994-04-25 | 1996-09-25 | 精工电子工业株式会社 | Oscillation circuit and non-volatile semiconductor memory |
| CN1545760A (en) * | 2001-09-12 | 2004-11-10 | �����ɷ� | Semiconductor integrated circuit |
-
2007
- 2007-03-09 CN CN2007100865020A patent/CN101262212B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1131842A (en) * | 1994-04-25 | 1996-09-25 | 精工电子工业株式会社 | Oscillation circuit and non-volatile semiconductor memory |
| CN1545760A (en) * | 2001-09-12 | 2004-11-10 | �����ɷ� | Semiconductor integrated circuit |
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| CN101262212A (en) | 2008-09-10 |
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