CN104426540B - Produce the VCO equipment of balanced duty cycle signals - Google Patents
Produce the VCO equipment of balanced duty cycle signals Download PDFInfo
- Publication number
- CN104426540B CN104426540B CN201310377830.1A CN201310377830A CN104426540B CN 104426540 B CN104426540 B CN 104426540B CN 201310377830 A CN201310377830 A CN 201310377830A CN 104426540 B CN104426540 B CN 104426540B
- Authority
- CN
- China
- Prior art keywords
- ring oscillation
- output
- duty cycle
- pmos
- cycle signals
- 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.)
- Active
Links
Landscapes
- Pulse Circuits (AREA)
- Oscillators With Electromechanical Resonators (AREA)
Abstract
The present invention relates to a kind of VCO equipment for producing balanced duty cycle signals, include apparatus body, wherein：Balanced configuration has at least two identical ring oscillation devices in apparatus body, ring oscillation device is provided with independent signal output port, ring oscillation device is constituted using level Four differential delay component, two ring oscillation devices join end to end, ring oscillation device one-level therein uses non-return connection, PMOS device is respectively connected with ring oscillation device, cross-couplings are connected the PMOS device each other, and the grid end ground connection of PMOS device, PMOS device is connected with the input of differential amplifying device jointly, the output end of differential amplifying device is connected with the input of anti-phase device.Thus, the problem of there is delay between two output signals of traditional endless oscillation device is eliminated, by cross-linked method, two-way output signal is synchronized, finally causes output signal to reach dutycycle in a balanced way.
Description
Technical field
The present invention relates to a kind of VCO equipment, more particularly to a kind of VCO equipment for producing balanced duty cycle signals.
Background technology
With making constant progress for society, amount of information exchange is growing day by day, and construction of information expressway standard is not yet
It is disconnected to improve, capacity is big, transmission speed is fast, long transmission distance, save the energy, anti-interference etc. more design standards also continuous
It is progressive.Under these circumstances, the research and research and development of the integrated circuit part in communication system are just tending to be white-hot.
Phaselocked loop（PLL）It is indispensable Key Circuit in the communications field, and voltage controlled oscillator（VCO）In being then PLL
Very crucial part.In recent years, with the continuous improvement of communication standard, system is to the speed of chip, the property such as power consumption and noise
Higher requirement can be proposed.Therefore, how to design high performance VCO circuits becomes important all the more.
VCO has a variety of alternative implementations, and conventional have a ring oscillation device and LC oscillators, people's often root
Selected according to both different application and index.
Traditional ring oscillation device is made up of a loop, and loop is made up of multiple delay cells, using multi-level differential
Amplifier loop configuration, output signal frequency equal phase on the contrary, but be due to the presence of delay between two signals, phase can not
Alignd with 180 ° of phase difference, result in final output signal dutycycle can not reach 1:1.
The content of the invention
The purpose of the present invention is exactly to produce balanced duty there is provided one kind to solve the above-mentioned problems in the prior art
Than the VCO equipment of signal.
The purpose of the present invention is achieved through the following technical solutions：
The VCO equipment of balanced duty cycle signals is produced, includes apparatus body, wherein：It is symmetrical in described apparatus body
At least two identical ring oscillation devices are configured with, described ring oscillation device is provided with independent signal output port,
Described ring oscillation device is constituted using level Four differential delay component, and two described ring oscillation devices join end to end, ring
Shape oscillation device one-level therein uses non-return connection, and two ring oscillation devices are controlled simultaneously using control voltage Vcon
Frequency of oscillation, be respectively connected with PMOS device on described ring oscillation device, described PMOS device intersects coupling each other
Connection is closed, the grid end ground connection of the PMOS device, described PMOS device is connected with the input of differential amplifying device, institute jointly
The output end for stating differential amplifying device is connected with the input of anti-phase device, described anti-phase device and is provided with output voltage terminal
Mouthful.
The VCO equipment of the balanced duty cycle signals of above-mentioned generation, wherein：Described differential delay component is brilliant by least six
Body pipe is constituted, M0 therein, M1, and M2 is nmos pass transistor, M3, M4, and M5, M6 is PMOS transistor, the differential amplifying device
Feature is, is driven by input, each output node is pulled to Vdd by extra PMOS transistor M5 and M6, even if tail current has
Big change also produces the output voltage swing of relative constancy.Every one-level of differential delay component postpones size and determined by tail current source,
Control voltage Vcon controls the size of tail current source, the delay of each grade of difference Delay Element is adjusted, so as to adjust oscillator
Frequency size.
Further, the VCO equipment of the balanced duty cycle signals of above-mentioned generation, wherein：Described differential amplifying device bag
Include to be independently connected on two main transistors connected using current mirror, the main transistor and have associated transistor, it is described
It is provided with differential amplifying device on unique output port, two described associated transistors and is provided with input port, is constituted double
End input Single-end output construction.
Further, the VCO equipment of the balanced duty cycle signals of above-mentioned generation, wherein：Described main transistor is p-type
Transistor, described associated transistor is N-type transistor, and two described main transistors are configured using identical breadth length ratio, described
Two associated transistors using identical breadth length ratio configure.
The advantage of technical solution of the present invention is mainly reflected in：Eliminate between two output signals of traditional endless oscillation device
The problem of in the presence of delay, by cross-linked method, two-way output signal is synchronized so that their frequencies are equal, phase
Position is opposite.Also, Single-end output is converted into by the difference amplifier of double-width grinding, finally output signal is reached in a balanced way
Dutycycle.
Brief description of the drawings
Fig. 1 is the VCO equipment organigrams for producing balanced duty cycle signals.
Fig. 2 is the circuit theory schematic diagram for the VCO equipment for producing balanced duty cycle signals.
Fig. 3 is the differential delay assembly circuit structural representation for constituting ring oscillation device.
Fig. 4 is the electrical block diagram of differential amplifying device.
| 1 | Apparatus body | 2 | Ring oscillation device |
| 3 | Signal output port | 4 | PMOS device |
| 5 | Differential amplifying device | 6 | Anti-phase device |
| 7 | Output voltage port |
Embodiment
The VCO equipment of the balanced duty cycle signals of generation as shown in figures 1-4, includes apparatus body, its special feature exists
In：Balanced configuration has at least two identical ring oscillation devices in the apparatus body that the present invention is used.Specifically, annular is shaken
Swing device and be provided with independent signal output port, the ring oscillation device is constituted using level Four differential delay component.Meanwhile, two
Individual ring oscillation device joins end to end, and ring oscillation device one-level therein uses non-return connection.
Also, control the frequency of oscillation of two ring oscillation devices simultaneously using control voltage Vcon.In ring oscillation dress
Put and be respectively connected with PMOS device.Cross-couplings are connected PMOS device each other, the grid end ground connection of the PMOS device.Also,
PMOS device is connected with the input of differential amplifying device jointly.Furthermore, the output end of differential amplifying device is connected with anti-phase dress
Output voltage port is provided with the input put, anti-phase device.Thus, by each four differential delay components are constituted up and down ring
Shape oscillation device, can form VCO vibration core circuit, for producing output pulse signal.Meanwhile, PMOS device can be by
Two-way output signal is synchronized, and eliminates delayed impact, makes the two paths of signals retrieved（Out1, out2）Frequency is identical, phase
180 ° of potential difference
Just from the point of view of the preferably embodiment of the present invention one, in order to effectively improve differential delay component by least six transistors
Composition, M0 therein, M1, M2 is nmos pass transistor, M3, M4, and M5, M6 is PMOS transistor, the characteristics of the differential amplifying device
It is, is driven by input, each output node is pulled to Vdd by extra PMOS transistor M5 and M6, even if tail current has big
Change also produces the output voltage swing of relative constancy.Every one-level delay size of differential delay component is determined by tail current source, is controlled
Voltage Vcon controls the size of tail current source.Meanwhile, the delay of each grade of difference Delay Element is adjusted, so as to adjust oscillator
Frequency size.Also, the use particular design of the differential delay component of the present invention, such as Fig. 3 adds additional transistor M5 and crystalline substance
Body pipe M6, Vdd is pulled to by each output node（The operating voltage of device inside）.So, even if tail current source has big change,
Also the output voltage swing of relative constancy can be produced.Furthermore output signal more increases amplitude after the amplification of difference amplifier,
So cause output waveform to insensitive for noise.
From the point of view of further, in order to effectively perform differential amplification, the differential amplifying device of use includes to be connect using current mirror
Two main transistors of method connection.Meanwhile, independent connection has associated transistor on main transistor.Also, on differential amplifying device
It is provided with unique output port, two associated transistors and is provided with input port, constitutes double-width grinding Single-end output construction.Tool
For body, main transistor is P-type transistor, and associated transistor is N-type transistor, and two main transistors are matched somebody with somebody using identical breadth length ratio
Put, two associated transistors are configured using identical breadth length ratio.From the point of view of Fig. 2,4, by out1, out2 is amplified output.It is brilliant
Body pipe PM0, PM1, PM2, PM3 are P-type transistor, and transistor NM0, NM1 are N-type transistor.Meanwhile, PM2 and PM3 host crystals
Pipe.Also, transistor PM0 and PM1, PM2 and PM3, NM0 and NM1, are configured using identical breadth length ratio.
It is can be seen that by above-mentioned character express using after the present invention, eliminate traditional endless oscillation device two defeated
The problem of going out between signal in the presence of delay, by cross-linked method, two-way output signal is synchronized so that their frequencies
Rate is equal, opposite in phase.Also, Single-end output is converted into by the difference amplifier of double-width grinding, finally causes output signal
Reach dutycycle in a balanced way.
Certainly, it the above is only the concrete application example of the present invention, protection scope of the present invention be not limited in any way.Remove
Outside above-described embodiment, the present invention can also have other embodiment.All use equivalent substitutions or the technical side of equivalent transformation formation
Case, all falls within scope of the present invention.
Claims (4)
1. producing the VCO equipment of balanced duty cycle signals, include apparatus body, it is characterised in that：In described apparatus body
Balanced configuration has at least two identical ring oscillation devices, and described ring oscillation device is provided with independent signal output part
Mouthful, described ring oscillation device is constituted using level Four differential delay component, and two described ring oscillation devices join end to end,
Ring oscillation device one-level therein uses non-return connection, controls two ring oscillations to fill simultaneously using control voltage Vcon
PMOS device is respectively connected with the frequency of oscillation put, described ring oscillation device, described PMOS device intersects each other
It is of coupled connections, the grid end ground connection of the PMOS device, described PMOS device is connected with the input of differential amplifying device jointly,
The output end of the differential amplifying device is connected with the input of anti-phase device, described anti-phase device and is provided with output voltage
Port.
2. the VCO equipment according to claim 1 for producing balanced duty cycle signals, it is characterised in that：Described difference is prolonged
Slow component is made up of at least six transistors, is driven by input, and each output node is pulled to by two extra PMOS devices
Vdd, has big change also to produce the output voltage swing of relative constancy, every one-level delay size of differential delay component even if tail current
Determined by tail current source, control voltage Vcon controls the size of tail current source, adjust the delay of each grade of difference Delay Element, from
And adjust the frequency size of oscillator.
3. the VCO equipment according to claim 1 for producing balanced duty cycle signals, it is characterised in that：Described difference is put
Big device, which includes to be independently connected on two main transistors connected using current mirror, the main transistor, mitochondrial derivative
It is provided with pipe, the differential amplifying device on unique output port, two described associated transistors and is provided with input port,
Constitute double-width grinding Single-end output construction.
4. the VCO equipment according to claim 3 for producing balanced duty cycle signals, it is characterised in that：Described host crystal
Manage as P-type transistor, described associated transistor is N-type transistor, and two described main transistors are matched somebody with somebody using identical breadth length ratio
Put, two described associated transistors are configured using identical breadth length ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310377830.1A CN104426540B (en) | 2013-08-27 | 2013-08-27 | Produce the VCO equipment of balanced duty cycle signals |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310377830.1A CN104426540B (en) | 2013-08-27 | 2013-08-27 | Produce the VCO equipment of balanced duty cycle signals |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104426540A CN104426540A (en) | 2015-03-18 |
| CN104426540B true CN104426540B (en) | 2017-08-11 |
Family
ID=52974616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310377830.1A Active CN104426540B (en) | 2013-08-27 | 2013-08-27 | Produce the VCO equipment of balanced duty cycle signals |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104426540B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107863950B (en) * | 2017-12-11 | 2023-10-27 | 许昌学院 | Dual-output frequency-adjustable clock signal generator |
| CN115389857B (en) * | 2022-10-27 | 2023-01-31 | 上海合见工业软件集团有限公司 | Signal cable delay detection system based on symmetrical circuit |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1141070A (en) * | 1997-07-23 | 1999-02-12 | Fujitsu Ltd | Digital control oscillation circuit |
| EP1421689B8 (en) * | 2001-08-16 | 2007-11-28 | Nxp B.V. | Differential ring oscillator stage |
| TWI254506B (en) * | 2003-09-16 | 2006-05-01 | Samsung Electronics Co Ltd | Ring oscillator, memory system comprising the same, and method for generating oscillating signals |
| US20060001496A1 (en) * | 2004-07-02 | 2006-01-05 | Abrosimov Igor A | Array oscillator and polyphase clock generator |
| JP2009194560A (en) * | 2008-02-13 | 2009-08-27 | Sony Corp | Frequency dividing circuit |
| US7852161B2 (en) * | 2009-01-14 | 2010-12-14 | Advanced Micro Devices, Inc. | Complementary ring oscillator with capacitive coupling |
-
2013
- 2013-08-27 CN CN201310377830.1A patent/CN104426540B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104426540A (en) | 2015-03-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103166604B (en) | A kind of low-power consumption sheet internal clock produces circuit | |
| CN103346784B (en) | A kind of matching type charge pump circuit for phase-locked loop | |
| CN101102110B (en) | Differential circuit delay unit for high-speed voltage control oscillator | |
| TW200843356A (en) | Frequency synthesizer | |
| CN106664058A (en) | Differential crystal oscillator circuit | |
| CN104201880B (en) | The low current mismatch charge pump circuit of anti-process fluctuation under phaselocked loop low-voltage | |
| CN104270147B (en) | Ring oscillator | |
| CN104821825A (en) | Wide tuning range ring voltage-controlled oscillator | |
| CN201039084Y (en) | Low-amplitude error and low-phase noise RF voltage controlled surge based on capacitance compensation | |
| CN104426540B (en) | Produce the VCO equipment of balanced duty cycle signals | |
| CN104753498A (en) | Wideband voltage-controlled oscillator circuit with low phase noise and low power consumption | |
| TWI381642B (en) | Signal source device and a signal source device for generating an output signal | |
| CN106506001A (en) | A kind of high-performance VCO circuit for being applied to PLL | |
| CN102411699A (en) | Adaptive frequency tracking system used in passive sensing electronic tag reader | |
| US20120019289A1 (en) | Injection-locked frequency divider | |
| CN107565934A (en) | Annular voltage controlled oscillator and phaselocked loop | |
| CN106444344A (en) | High-stability clock generation circuit based on automatic biasing frequency locking ring | |
| CN107124181B (en) | Injection locking frequency divider circuit with wide locking range | |
| CN204013481U (en) | Realize the circuit structure that low-voltage crystal oscillator drives | |
| CN101521498A (en) | Voltage controlled oscillator | |
| CN106452364B (en) | A kind of broad tuning range eight-phase voltage controlled oscillator | |
| CN103825610B (en) | Dividing two frequency divider circuit based on current mirror switch logic | |
| CN107332523A (en) | A kind of power amplifier for suppressing backlash | |
| CN101640531A (en) | Current mode logic latch | |
| CN111277222A (en) | Current multiplexing voltage-controlled oscillator based on grid-source transformer feedback |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |