CN101222215A - Variable multi-group resistance-capacitance oscillator - Google Patents
Variable multi-group resistance-capacitance oscillator Download PDFInfo
- Publication number
- CN101222215A CN101222215A CNA2007100023287A CN200710002328A CN101222215A CN 101222215 A CN101222215 A CN 101222215A CN A2007100023287 A CNA2007100023287 A CN A2007100023287A CN 200710002328 A CN200710002328 A CN 200710002328A CN 101222215 A CN101222215 A CN 101222215A
- Authority
- CN
- China
- Prior art keywords
- resistance
- capacitance
- oscillator
- switch
- output
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000725 suspension Substances 0.000 claims description 7
- 230000004913 activation Effects 0.000 claims description 2
- 239000003990 capacitor Substances 0.000 abstract 13
- 238000010586 diagram Methods 0.000 description 10
- 230000007812 deficiency Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
Images
Landscapes
- Inductance-Capacitance Distribution Constants And Capacitance-Resistance Oscillators (AREA)
Abstract
The invention discloses a variable multi-group resistor-capacitor oscillator which comprises a resistor-capacitor option switch arranged at the input end of the oscillator, a resistor output end, a capacitor output end, at least one resistor switch with the first end connected with the resistor-capacitor option switch and the second end in suspended joint with the resistor output end, as well as at least one capacitor switch with the first end connected with the resistor-capacitor option switch and the second end in suspended joint with the capacitor output end, wherein the resistor-capacitor option switch can select the resistor switches with the second ends connected with the resistor output end and the capacitor switches with the second ends connected with the capacitor output end, thereby ensuring that the resistor output end and the capacitor output end generates resistor-capacitor output values in different combinations. With a simple structure and multiple combinations of external resistors and capacitors, the invention can reach the goals of increasing the application diversity and cost competitiveness of an integrated circuit.
Description
Technical field
The present invention relates to a kind of resistance capacitance (RC) oscillator, particularly relate to a kind of single channel (single channel) type variable and organize the RC oscillator more.
Background technology
The external many groups RC oscillator of resistance (R) or electric capacity (C) generally all designs this RC oscillator in the mode that fixedly meets R or C for simplified design and for the purpose of reducing cost on the market.That is to say not have way the user of application end and change meeting R or meeting C in this RC oscillator, and the numerical value can only change the numerical value when meeting R in this RC oscillator or meet C the time.
See also Fig. 1, it is the partial circuit figure of first kind of RC oscillator in the prior art.In Fig. 1, RC oscillator 10 mainly is made of 4 C end C0～C3 and 4 R end R0～R3.In addition, the group of this oscillator 10 selects to be arranged at the output of each R end and C end, shares the input CKIN that end then is arranged at this oscillator 10.
Though RC oscillator 10 shown in Figure 1 makes its simplicity of design and with low cost because of the circuit design mode that fixedly meets R or meet C, but it only can fixedly meet R or meet C when application end because of the user, so its quantity that meets R and meet C when using is fixing and can't changes.When the quantity of R or C has the not enough use of a side,, thereby cause the inconvenience and the wasting of resources in the application even the opposing party's pin has residue also can't substitute use.
On the other hand, also existing another kind to meet R on the market or meet C can be by the RC oscillator design scheme of user's selection, its inside option by integrated circuit is done selection, but in fact inner integrated circuit (IC) design still must be designed to R and two groups of circuit of C, thereby causes the increase of cost.
See also Fig. 2, it is the partial circuit figure of second kind of RC oscillator in the prior art.In Fig. 2, RC oscillator 20 mainly is made of 8 RC end RC0～RC7.When the user operated, at first the user brought in by control and selected meet R or connect after the C, was met R or met C by external circuit again to cooperate.
Yet the shortcoming of the described RC oscillator 20 of Fig. 2 is that each the RC pin at this oscillator 20 must increase switch and control circuit extraly, thereby causes the increase of cost.Moreover the switch of described extra increase can make the time-delay of this oscillating circuit increase, thereby causes the linearity variation of frequency of oscillation, and this phenomenon is especially obvious when low voltage operating.
Summary of the invention
At above-mentioned the deficiencies in the prior art, the object of the invention is to propose a kind of type variable and organizes the RC oscillator more, it has the combination of multiple external R and C, can allow the user utilize different circuit connectings to change arbitrarily according to application demand meets R or meets C, and choose at random the oscillator that meets R or meet C need not to increase under the situation of integrated circuit and application cost, thereby improve the application diversity and the cost competitiveness of integrated circuit.
In order to achieve the above object, the present invention proposes a kind of variable multi-group resistance-capacitance (RC) oscillator, comprise the resistance capacitance selector switch that is arranged on this oscillator input, the resistance output, the electric capacity output, first end is connected in this resistance capacitance selector switch and the second end suspension joint at least one resistance switch of this resistance output, and first end is connected in this resistance capacitance selector switch and the second end suspension joint at least one capacitance switch of this electric capacity output, wherein by this resistance capacitance selector switch to select that second end of which resistance switch is connected in this resistance output, and select second end of which capacitance switch is connected in this electric capacity output, make the resistance capacitance output valve that produces various combination on this resistance output and this electric capacity output.
Simultaneously, the present invention also proposes a kind of microcontroller (MCU, Micro Controller Unit), and it comprises the variable multi-group resistance-capacitance oscillator that the invention described above proposes at least.
In a word, variable multi-group resistance-capacitance oscillator proposed by the invention simple in structure and have the combination of multiple outer meeting resistance and electric capacity, can allow user flexibility change connecting resistance arbitrarily or connect electric capacity according to application demand, and choose at random the oscillator that constitutes connecting resistance or connect electric capacity under the situation of integrated circuit and application cost need not to increase, thereby reach the application diversity that improves integrated circuit and the purpose of cost competitiveness.
Description of drawings
Fig. 1: the partial circuit figure of first kind of RC oscillator in the prior art;
Fig. 2: the partial circuit figure of second kind of RC oscillator in the prior art;
Fig. 3: the circuit diagram of variable multi-group resistance-capacitance oscillator proposed by the invention;
Fig. 4 A: the circuit diagram of first embodiment of variable multi-group resistance-capacitance oscillator proposed by the invention;
Fig. 4 B: the circuit diagram of second embodiment of variable multi-group resistance-capacitance oscillator proposed by the invention;
Fig. 5 A: the circuit diagram that variable multi-group resistance-capacitance oscillator proposed by the invention is applied to an embodiment of the single channel variable multi-group resistance-capacitance oscillator that resistance capacitance can be external; And
Fig. 5 B: the circuit diagram that variable multi-group resistance-capacitance oscillator proposed by the invention is applied to another embodiment of the single channel variable multi-group resistance-capacitance oscillator that resistance capacitance can be external.
And the description of reference numerals of each primary clustering is as follows in the above-mentioned accompanying drawing:
10,20,30,41,42 expression variable multi-group resistance-capacitance oscillators;
51,52 expression single channel variable multi-group resistance-capacitance oscillators;
R0～R5 represents resistance switch, and C0～C5 represents capacitance switch, and RC0～RC7 represents the resistance capacitance switch;
CKIN represents input, and ROUT represents the resistance output, and COUT represents the electric capacity output,
VDD represents high-pressure side, and VSS represents low-pressure end.
Embodiment
See also Fig. 3, it is the circuit diagram of variable multi-group resistance-capacitance oscillator proposed by the invention.In Fig. 3, RC oscillator 30 mainly includes the resistance capacitance selector switch (being positioned at the outside, not shown), resistance output ROUT, electric capacity output COUT, first end that are arranged on this oscillator 30 input CKIN and is connected in this resistance capacitance selector switch and the second end suspension joint and is connected in this resistance capacitance selector switch and the second end suspension joint in a plurality of capacitance switch RC0～RC7 of electric capacity output COUT in a plurality of resistance switch RC0～RC7 of resistance output ROUT and first end.
Technical characterictic of the present invention is, the user can be connected in electric capacity output COUT to select second end with which resistance switch to be connected in resistance output ROUT and to select with second end of which capacitance switch by described resistance capacitance selector switch, make resistance output ROUT and electric capacity output COUT go up produce the resistance capacitance output valve of various combination, and producing different output on the output or different fixedly DC voltage level to the output is provided.
With the electric wiring plan of reality, see also Fig. 4 A, it is the circuit diagram of variable multi-group resistance-capacitance oscillator first embodiment proposed by the invention.In Fig. 4 A, RC oscillator 41 is oscillators of one eight, disposes 6 resistance switch R0～R5 and 2 capacitance switch C0～C1 therein.In use, if want to use resistance switch R1, as long as resistance switch R1 is connected to resistance output ROUT; And if want to use capacitance switch C0, then as long as capacitance switch C0 is connected to electric capacity output COUT.Like this, each RC group pin can be arranged with user's demand, at random gives the function that meets R or meet C.
Hence one can see that, and RC oscillator shown in Fig. 4 A 41 can produce the resistance capacitance output valve of 12 kinds (6*2) combination on resistance output ROUT and electric capacity output COUT because having 6 R values and 2 C values.
See also Fig. 4 B, it is the circuit diagram of variable multi-group resistance-capacitance oscillator second embodiment proposed by the invention.In Fig. 4 B, RC oscillator 42 is one eight oscillator equally, but with previous embodiment different be in, dispose 2 resistance switch R0～R1 and 6 capacitance switch C0～C5 therein.
RC oscillator shown in Fig. 4 B 42 is because have 2 R values and 6 C values, and can produce the resistance capacitance output valve that 12 kinds (2*6) makes up equally on resistance output ROUT and electric capacity output COUT.
According to above-mentioned two embodiment, those skilled in the art can know the various R of eight RC oscillators and the configuration variation of C easily by inference.For instance, as if connection, then can produce the output combination of 16 groups of RC oscillators with 4 C and 4 R; And as if the combination with many R and many C, then can producing then nearly, 225 (15*15) plant the output combination.
What deserves to be mentioned is, among the embodiment in front, though the user directly determines described resistance switch, capacitance switch by the resistance capacitance selector switch that utilizes this oscillator outside suspension joint be connected, but also can between each resistance switch, capacitance switch and resistance capacitance selector switch, the activation switch be set, utilize its enable signal that produces to start described resistance switch, capacitance switch is connected with described resistance, electric capacity output ROUT, COUT's.
See also Fig. 5 A, it is for being applied to variable multi-group resistance-capacitance oscillator proposed by the invention in the circuit diagram of the embodiment that RC can external single channel (single channel) variable multi-group resistance-capacitance oscillator.In Fig. 5 A, single channel variable multi-group resistance-capacitance oscillator 51 mainly is made of 2 resistance switchs and 2 capacitance switchs, its resistance output ROUT is as output, and electric capacity output COUT is then as the low-pressure end VSS of single channel variable multi-group resistance-capacitance oscillator 51.
On the other hand, Fig. 5 B is then for being applied to variable multi-group resistance-capacitance oscillator proposed by the invention in the circuit diagram of another embodiment that RC can external single channel variable multi-group resistance-capacitance oscillator.In Fig. 5 B, single channel variable multi-group resistance-capacitance oscillator 52 is made of 2 resistance switchs and 2 capacitance switchs equally, but difference be in its resistance output ROUT as high-pressure side VDD, electric capacity output COUT is then as the low-pressure end VSS of single channel variable multi-group resistance-capacitance oscillator 51.
Be noted that, variable multi-group resistance-capacitance oscillator of the present invention is made single channel (single channel) variable multi-group resistance-capacitance oscillator except mode that can single product, can also make one of functional unit of microcontroller (MCU, Micro Controller Unit).In addition, the number of described resistance switch, capacitance switch is decided on the figure place of this oscillator: the quantity of supposing described resistance switch is that the quantity of m, described capacitance switch is n, and wherein m and n are all the integer greater than 0, and then m+n is the figure place of this oscillator.
In sum, variable multi-group resistance-capacitance oscillator proposed by the invention simple in structure and have the combination of multiple outer meeting resistance and electric capacity, can allow user flexibility change connecting resistance arbitrarily or connect electric capacity according to application demand, and choose at random the oscillator that constitutes connecting resistance or connect electric capacity under the situation of integrated circuit and application cost need not to increase, thereby reach the application diversity that improves integrated circuit and the purpose of cost competitiveness.
Those skilled in the art can be according to the present invention spirit and principle carry out various modifications, and protection range of the present invention is as the criterion with defining of appended claims.
Claims (8)
1. a variable multi-group resistance-capacitance oscillator is characterized in that, comprising:
The resistance capacitance selector switch is arranged on the input of this oscillator;
The resistance output;
The electric capacity output;
At least one resistance switch, its first end is connected in described resistance capacitance selector switch, and its second end suspension joint is in described resistance output; And
At least one capacitance switch, its first end is connected in described resistance capacitance selector switch, and its second end suspension joint is in described electric capacity output;
Wherein, to select second end with which resistance switch to be connected in described resistance output and to select second end of which capacitance switch is connected in described electric capacity output by described resistance capacitance selector switch, makes the resistance capacitance output valve that produces various combination on described resistance output and the described electric capacity output.
2. variable multi-group resistance-capacitance oscillator as claimed in claim 1 is characterized in that, this oscillator is the single channel variable multi-group resistance-capacitance oscillator.
3. variable multi-group resistance-capacitance oscillator as claimed in claim 1 is characterized in that, selects via described this resistance capacitance selector switch that is positioned at this oscillator outside.
4. variable multi-group resistance-capacitance oscillator as claimed in claim 1 is characterized in that, described resistance output and described electric capacity output are connected to different fixedly DC voltage level.
5. variable multi-group resistance-capacitance oscillator as claimed in claim 1 is characterized in that, described resistance output and described electric capacity output are connected to the output of this oscillator.
6. variable multi-group resistance-capacitance oscillator as claimed in claim 1, it is characterized in that, this oscillator also comprises a plurality of activation switches, be connected between described resistance capacitance selector switch and described resistance switch, the capacitance switch, be used for sending enable signal, second end of which capacitance switch be connected in this electric capacity output to select second end with which resistance switch to be connected in this resistance output and to select according to this resistance capacitance selector switch.
7. variable multi-group resistance-capacitance oscillator as claimed in claim 1 is characterized in that, the quantity of described resistance switch is that the quantity of m, described capacitance switch is n, and m and n are all the integer greater than 0, and m+n is the figure place of this oscillator.
8. a microcontroller is characterized in that, comprises variable multi-group resistance-capacitance oscillator as claimed in claim 1 at least.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100023287A CN101222215A (en) | 2007-01-11 | 2007-01-11 | Variable multi-group resistance-capacitance oscillator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007100023287A CN101222215A (en) | 2007-01-11 | 2007-01-11 | Variable multi-group resistance-capacitance oscillator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101222215A true CN101222215A (en) | 2008-07-16 |
Family
ID=39631840
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007100023287A Pending CN101222215A (en) | 2007-01-11 | 2007-01-11 | Variable multi-group resistance-capacitance oscillator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101222215A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116034533A (en) * | 2020-08-12 | 2023-04-28 | 英飞凌科技有限责任公司 | Method and circuit for reducing electromagnetic interference (EMI) of analog blocks |
-
2007
- 2007-01-11 CN CNA2007100023287A patent/CN101222215A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116034533A (en) * | 2020-08-12 | 2023-04-28 | 英飞凌科技有限责任公司 | Method and circuit for reducing electromagnetic interference (EMI) of analog blocks |
| CN116034533B (en) * | 2020-08-12 | 2024-03-01 | 英飞凌科技有限责任公司 | Method and circuit for reducing electromagnetic interference (EMI) of analog blocks |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7282985B2 (en) | Charge pump with at least two outputs | |
| EP1049256A1 (en) | Low supply voltage oscillator circuit, particularly of the CMOS type | |
| US20060145539A1 (en) | Circuit configuration for a capacitive touch switch | |
| JP5770596B2 (en) | Capacitance detection circuit and touch sensor signal processing circuit | |
| WO2003028215A3 (en) | Tunable oscillator | |
| CN102880088A (en) | Expander circuit of switching value input interface | |
| CN108781070B (en) | Variable frequency RC oscillator | |
| EP0544380B1 (en) | An initialization circuit for memory registers | |
| CN101222215A (en) | Variable multi-group resistance-capacitance oscillator | |
| EP1739828A8 (en) | Phase shift circuit and multibit phase shifter | |
| EP2099184A1 (en) | Driver arrangement and signal generation method | |
| CN113484602B (en) | Ultra-low power consumption programmable power supply voltage detection circuit | |
| JP2008160798A (en) | Variable resistor/capacitor rc oscillator | |
| CN103970376A (en) | Capacitive touch device and touch sensing method thereof | |
| CN105511534B (en) | Multilevel partial-pressure circuit | |
| CN101677233B (en) | Down conversion filter | |
| CN100529853C (en) | Gamma voltage follower circuit and LCD adopting same | |
| CN201112106Y (en) | Transformer interface connection device | |
| CN101320970B (en) | Programmable integer/fractional number frequency divider | |
| CN102931983B (en) | Delay element and digitally controlled oscillator | |
| CN207817640U (en) | A kind of keyboard circuit based on NE555 multi-harmonic-oscillations | |
| JP4286283B2 (en) | IC device and IC device programming method | |
| CN103166601B (en) | Produce the agitator of adjustable output signal frequency | |
| CN100367261C (en) | Selection circuit for selecting slave module in accordance with connection sequence and control mode thereof | |
| CN114625194A (en) | Reference voltage generating circuit and generating method thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Open date: 20080716 |