CN205584151U - Novel high accuracy RC oscillator circuit - Google Patents
Novel high accuracy RC oscillator circuit Download PDFInfo
- Publication number
- CN205584151U CN205584151U CN201620409073.0U CN201620409073U CN205584151U CN 205584151 U CN205584151 U CN 205584151U CN 201620409073 U CN201620409073 U CN 201620409073U CN 205584151 U CN205584151 U CN 205584151U
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- China
- Prior art keywords
- circuit
- hysteresis comparator
- mirror image
- outfan
- comparator
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Abstract
The utility model discloses a novel high accuracy RC oscillator circuit, but including operational amplifier and configuration register, operational amplifier's non inverting input end is connected with reference voltage source, and operational amplifier's output is connected with the mirror image circuit, and the non inverting input end of mirror image circuit is connected with the standard voltage source, and the inverting input end is connected with the voltage -current conversion ware, and the output of voltage -current conversion ware is connected with two limit comparator circuits, a hysteresis comparator's of two limit comparator circuits inverting terminal and the 2nd hysteresis comparator's syntropy end all are connected to reference voltage source, and a hysteresis comparator's non inverting input end is connected with RC charging and discharging circuit, the 2nd hysteresis comparator's reverse input end ground connection, and the output of two limit comparator circuits is connected with the RS trigger, but configuration register is connected with the digit accent and repaiies the circuit, and the digit is transferred and is repaiied circuit connection between the output of mirror image circuit, still be connected with the temperature compensating MOS pipe between two MOS of the input pipe of mirror image circuit.
Description
Technical field
This utility model relates to integrated kitchen range technical field, is specially a kind of novel high-precision RC agitator electricity
Road.
Background technology
In large-scale digital ic, clock signal has become requisite part.These numeral systems
In the design of system circuit, conventional clock generation circuit have 3 kinds: Rc agitator, ring oscillator and
Crystal oscillator.RC agitator is to apply the most universal a kind of pierce circuit comparatively speaking, RC
It is short that agitator has the startup time, and frequency is easily dimmable, it is easy to uses common CMOS integrated circuit work
The advantages such as skill manufactures and designs.But it also has frequency of oscillation poor stability, and the frequency of generation is subject to simultaneously
The electrology characteristic impact of the various components and parts of supply voltage, ambient temperature and composition agitator is bigger
Shortcoming, precision is poor.
Utility model content
For problem above, this utility model provides a kind of novel high-precision RC pierce circuit, tool
Have and frequency is carried out mechanism and the Design of Temperature Compensation that numeral trims so that it is to voltage, temperature and technique
The sensitivity of deviation reduces, and effectively eliminates the error that comparator hysteresis brings, thus provides stable
And accurate clock signal, can effectively solve the problem in background technology.
For achieving the above object, the following technical scheme of this utility model offer: a kind of novel high-precision RC
Pierce circuit, including operational amplifier and configurable depositor, the homophase of described operational amplifier is defeated
Entering to hold connection to have reference voltage source, the outfan of operational amplifier connects mirror image circuit, and anti-phase defeated
Entering end and be connected to the near end of mirror image circuit also by wire, the in-phase input end of described mirror image circuit is even
Being connected to standard voltage source, inverting input connects voltage current adapter, voltage current adapter
Outfan connects double-limit comparator circuit and RC charge-discharge circuit；
Described double-limit comparator circuit includes the first hysteresis comparator and the second hysteresis comparator, and first is sluggish
The end of oppisite phase of comparator and the end in the same direction of the second hysteresis comparator are all connected to reference voltage source, and first is slow
The in-phase input end of stagnant comparator connects RC charge-discharge circuit, the reverse input of the second hysteresis comparator
End ground connection, the outfan of double-limit comparator circuit connects rest-set flip-flop；Described configurable depositor is even
Being connected to numeral adjusting circuit, numeral adjusting is electrically connected between the outfan of mirror image circuit.
As a kind of preferably technical scheme of this utility model, the S end of described rest-set flip-flop is connected to the
The outfan of one hysteresis comparator, R end is connected to the outfan of the second hysteresis comparator, rest-set flip-flop
In-phase output end be oscillator output end, reversed-phase output is wired to Voltage to current transducer
The input of device.
As a kind of preferably technical scheme of this utility model, described numeral adjusting circuit is controlled brilliant lock
Pipe array, includes altogether 6 turn-off thyristors, and the grid of IGCT is connected to configurable posting
The current output terminal of storage.
As this utility model a kind of preferably technical scheme, input two metal-oxide-semiconductor of described mirror image circuit
Between be also associated with temperature-compensating metal-oxide-semiconductor, and the grid of temperature-compensating metal-oxide-semiconductor is connected to computing and puts
The outfan of big device.
Compared with prior art, the beneficial effects of the utility model are: this novel high-precision RC agitator
Circuit, by arranging numeral adjusting circuit, fine setting charging current is to adjust output frequency；By arranging
Temperature-compensating metal-oxide-semiconductor eliminates the impact that variations in temperature is brought；By arranging rest-set flip-flop, in conjunction with double limits
Comparator pile structure, eliminate the error that comparator hysteresis brings to frequency of oscillation；Shaken by reduction
Swing the device sensitivity to voltage, temperature and process deviation, substantially increase the degree of accuracy of agitator, from
And stable and accurate clock signal is provided.
Accompanying drawing explanation
Fig. 1 is this utility model electrical block diagram；
Fig. 2 is RC charge-discharge circuit schematic diagram；
Fig. 3 is mirror image circuit schematic diagram；
Fig. 4 is numeral adjusting circuit theory diagrams.
In figure: 1-operational amplifier；2-can configure depositor；3-mirror image circuit；4-standard voltage source；
5-voltage current adapter；6-double-limit comparator circuit；7-the first hysteresis comparator；The sluggish ratio of 8-second
Relatively device；9-RS trigger；10-numeral adjusting circuit；11-RC charge-discharge circuit；12-temperature-compensating
Metal-oxide-semiconductor；13-reference voltage source.
Detailed description of the invention
Below in conjunction with the accompanying drawing in this utility model embodiment, to the skill in this utility model embodiment
Art scheme is clearly and completely described, it is clear that described embodiment is only this utility model
A part of embodiment rather than whole embodiments.Based on the embodiment in this utility model, ability
The every other embodiment that territory those of ordinary skill is obtained under not making creative work premise,
Broadly fall into the scope of this utility model protection.
Embodiment:
Fig. 1 to Fig. 4, a kind of technical scheme of this utility model offer: a kind of novel high-precision are provided
RC pierce circuit, including operational amplifier 1 and configurable depositor 2, described operational amplifier 1
In-phase input end connect and have reference voltage source 13, the outfan of operational amplifier 1 connects mirror image electricity
Road 3, and inverting input is connected to the near end of mirror image circuit 3, described mirror image circuit also by wire
The in-phase input end of 3 connects standard voltage source 4, and inverting input connects voltage current adapter 5,
The outfan of voltage current adapter 5 connects double-limit comparator circuit 6 and RC charge-discharge circuit 11；
Described double-limit comparator circuit 6 includes the first hysteresis comparator 7 and the second hysteresis comparator 8, and first is slow
The end of oppisite phase of stagnant comparator 7 and the end in the same direction of the second hysteresis comparator 8 are all connected to reference voltage source 13,
The in-phase input end of the first hysteresis comparator 7 connects has RC charge-discharge circuit 11, the second sluggishness to compare
The reverse input end ground connection of device 8, the outfan of double-limit comparator circuit 6 connects rest-set flip-flop 9；
Described configurable depositor 2 connects digital adjusting circuit 10, and numeral adjusting circuit 10 is connected to mirror image
Between the outfan of circuit 3.
The S end of described rest-set flip-flop 9 is connected to the outfan of the first hysteresis comparator 7, and R end connects
To the outfan of the second hysteresis comparator 8, the in-phase output end of rest-set flip-flop 9 is oscillator output end,
Reversed-phase output is wired to the input of voltage current adapter 5；Described numeral adjusting electricity
Road 10 is controlled thyristor array, includes altogether 6 turn-off thyristors, and the grid of IGCT
It is connected to the current output terminal of configurable depositor 2；Input two metal-oxide-semiconductor of described mirror image circuit 3 it
Between be also associated with temperature-compensating metal-oxide-semiconductor 12, and the grid of temperature-compensating metal-oxide-semiconductor 12 is connected to computing
The outfan of amplifier 1.
Utility model works principle: described operational amplifier 1 constitutes reverse proportional amplifier, will output
Terminal voltage clamper is with on the same current potential of reference voltage source 13；Described mirror image circuit 3 forms constant voltage source electricity
Road, provides burning voltage for RC charge-discharge circuit；Described standard voltage source 4 provides for mirror image circuit 3 and leads
Energising pressure, reference voltage source is converted into reference current source, after conversion by described voltage current adapter 5
RC charge-discharge circuit 11 is charged by current signal；First hysteresis comparator 7 and the second hysteresis comparator
8 all have one section to be connected to reference voltage source, and the other end is connected respectively to the electric capacity of RC charge-discharge circuit 11
The two poles of the earth, when electric capacity both end voltage exceedes reference voltage, oscillator output voltage overturns, and forms vibration
Waveform；Rest-set flip-flop 9 connects two hysteresis comparators and forms symmetrical structure, eliminates comparator hysteresis and gives
The error that frequency of oscillation is brought；Described configurable depositor 2, according to plug-in, exports different height
Level, to the turn-off thyristor grid of numeral adjusting circuit 10, controls the switch of IGCT, thus right
Charging current is finely adjusted；Described temperature-compensating metal-oxide-semiconductor 12 improves input impedance, to compensate in temperature
Rise the controllable silicon resistance brought and decline the impact caused, improve circuit precision.
This novel high-precision RC pierce circuit, by arranging numeral adjusting circuit, finely tunes charging current
To adjust output frequency；The impact that variations in temperature is brought is eliminated by arranging temperature-compensating metal-oxide-semiconductor；Logical
Cross and rest-set flip-flop is set, in conjunction with the structure that piles of double-limit comparator, eliminate comparator hysteresis to oscillation frequency
The error that rate is brought；By reducing a pair of oscillators voltage, temperature and the sensitivity of process deviation, significantly
Improve the degree of accuracy of agitator, thus stable and accurate clock signal is provided.
The foregoing is only preferred embodiment of the present utility model, not new in order to limit this practicality
Type, all any amendment, equivalent and improvement made within spirit of the present utility model and principle
Deng, within should be included in protection domain of the present utility model.
Claims (4)
1. a novel high-precision RC pierce circuit, including operational amplifier (1) with configurable post
Storage (2), the in-phase input end of described operational amplifier (1) connects reference voltage source (13), fortune
The outfan connection calculating amplifier (1) has mirror image circuit (3), and inverting input is also by wire even
Receive the near end of mirror image circuit (3), it is characterised in that: the homophase of described mirror image circuit (3) is defeated
Entering to hold connection to have standard voltage source (4), inverting input connects voltage current adapter (5), electricity
The outfan of voltage-current converter (5) connects double-limit comparator circuit (6) and RC charge-discharge circuit
(11)；
Described double-limit comparator circuit (6) includes the first hysteresis comparator (7) and the second hysteresis comparator
(8), the end of oppisite phase of the first hysteresis comparator (7) and the end in the same direction of the second hysteresis comparator (8) are equal
Being connected to reference voltage source (13), the in-phase input end of the first hysteresis comparator (7) connects has RC to fill
Discharge circuit (11), the reverse input end ground connection of the second hysteresis comparator (8), double-limit comparator electricity
The outfan on road (6) connects rest-set flip-flop (9)；Described configurable depositor (2) connects number
The tone of Chinese characters repaiies circuit (10), and numeral adjusting circuit (10) is connected between the outfan of mirror image circuit (3).
A kind of novel high-precision RC pierce circuit the most according to claim 1, its feature exists
In: the S end of described rest-set flip-flop (9) is connected to the outfan of the first hysteresis comparator (7), R
End is connected to the outfan of the second hysteresis comparator (8), and the in-phase output end of rest-set flip-flop (9) is
Oscillator output end, reversed-phase output is wired to the input of voltage current adapter (5).
A kind of novel high-precision RC pierce circuit the most according to claim 1, its feature exists
In: described numeral adjusting circuit (10) is controlled thyristor array, and including altogether 6 can turn off
IGCT, and the grid of IGCT is connected to the current output terminal of configurable depositor (2).
A kind of novel high-precision RC pierce circuit the most according to claim 1, its feature exists
In: it is also associated with temperature-compensating metal-oxide-semiconductor (12) between input two metal-oxide-semiconductor of described mirror image circuit (3),
And the grid of temperature-compensating metal-oxide-semiconductor (12) is connected to the outfan of operational amplifier (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620409073.0U CN205584151U (en) | 2016-05-09 | 2016-05-09 | Novel high accuracy RC oscillator circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620409073.0U CN205584151U (en) | 2016-05-09 | 2016-05-09 | Novel high accuracy RC oscillator circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205584151U true CN205584151U (en) | 2016-09-14 |
Family
ID=56857095
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620409073.0U Expired - Fee Related CN205584151U (en) | 2016-05-09 | 2016-05-09 | Novel high accuracy RC oscillator circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205584151U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107634741A (en) * | 2017-10-23 | 2018-01-26 | 福州大学 | A kind of hysteresis comparator |
| WO2018218450A1 (en) * | 2017-05-27 | 2018-12-06 | 深圳市汇顶科技股份有限公司 | Oscillation circuit and user equipment |
| CN110708048A (en) * | 2019-12-16 | 2020-01-17 | 峰岹科技（深圳）有限公司 | Hysteresis comparator circuit |
-
2016
- 2016-05-09 CN CN201620409073.0U patent/CN205584151U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018218450A1 (en) * | 2017-05-27 | 2018-12-06 | 深圳市汇顶科技股份有限公司 | Oscillation circuit and user equipment |
| CN107634741A (en) * | 2017-10-23 | 2018-01-26 | 福州大学 | A kind of hysteresis comparator |
| CN110708048A (en) * | 2019-12-16 | 2020-01-17 | 峰岹科技（深圳）有限公司 | Hysteresis comparator circuit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160914 Termination date: 20190509 |