CN208079046U - The low mismatch charge pump circuit of wide dynamic range applied to phaselocked loop - Google Patents
The low mismatch charge pump circuit of wide dynamic range applied to phaselocked loop Download PDFInfo
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- CN208079046U CN208079046U CN201821259187.7U CN201821259187U CN208079046U CN 208079046 U CN208079046 U CN 208079046U CN 201821259187 U CN201821259187 U CN 201821259187U CN 208079046 U CN208079046 U CN 208079046U
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Abstract
The utility model discloses a kind of low mismatch charge pump circuit of the wide dynamic range applied to phaselocked loop, including biasing module, current mirror module and charge and discharge matching module.Biasing module is for generating constant current and being output to current mirror module.Current mirror module is used to provide bias voltage to charging control unit, charhing unit, discharge cell, control of discharge unit in charge and discharge matching module.Charge-discharge control unit makes charging and discharging currents match for detecting charge pump output voltage and adjusting charging and discharging currents.Charge/discharge unit is used for charge pump output loading charge or discharge.Output voltage is fed back to charge-discharge control unit and charge pump charging current and discharge current in very wide output voltage range is matched by the charge pump circuit of the utility model；Charge pump circuit is not necessarily to additional operational amplification circuit, and circuit structure is simple, and stability is good, low in energy consumption, is easily integrated, and is suitable for High-Performance Phase-Locked circuit.
Description
Technical field
The utility model is related to technical field of integrated circuits, and in particular to a kind of wide dynamic range applied to phaselocked loop is low
Mismatch charge pump circuit.
Background technology
Phaselocked loop (Phase-locked loops, PLL) is a kind of frequency and phase realized using feedback control principle
Simultaneous techniques, effect be by the clock of circuit output and its outside reference clock holding it is synchronous.When the frequency of reference clock
When rate or phase change, phaselocked loop can detect this variation, and adjust output by its internal reponse system
Frequency, until the two re-synchronization, this synchronization is also known as " locking phase ".Phaselocked loop has application in various fields, such as wireless communication,
DTV, broadcast etc..Specifically application range includes but not limited to：Wireless communication system transceiver module (Transceiver),
Data and clock recovery circuitry (Clock and Data Recovery-CDR), frequency comprehensive circuit (Frequency
Synthesizer), frequency hopping communications (Frequency-hopping spread spectrum-FHSS), digital television receiver
Deng.
Phase-locked loop circuit is usually by phase frequency detector (PFD) (or phase discriminator:PD), low-pass filter (LPF), voltage controlled oscillation
Device (VCO), backfeed loop (usually being realized by a frequency divider (Frequency divider)) are constituted.Phase frequency detector pair
The reference signal of input and the signal of backfeed loop export a signal for representing the two difference into the comparison of line frequency and phase
To low-pass filter, low-pass filter filters out the radio-frequency component in input signal, retains direct current component and send to voltage controlled oscillator,
The output frequency of voltage controlled oscillator is controlled by input voltage, and the signal that voltage controlled oscillator exports is returned to frequency discrimination by backfeed loop
Phase discriminator, and then realize frequency synthesis function.Charge pump circuit plays very important effect in charge pump phase lock loop, master
It is the voltage signal of simulation to be converted to by low-pass filter, the letter from phase frequency detector pulse digital signal to want function
The frequency of oscillation of number control voltage controlled oscillator.Therefore, the performance of charge pump circuit has the characteristic of phaselocked loop very important
It influences.
Traditional charge pump circuit is in order to realize the matching precision of higher charging current and discharge current, generally use fortune
The voltage that amplifier circuit comes clamp current mirror and output end is calculated, this not only increases the complexity of circuit, also adds circuit
Whole power consumption, area and stability problem.In order to meet phaselocked loop there is wider reference frequency output, generally use to improve
The tuning sensitivity of voltage controlled oscillator and the method for the voltage dynamic range for widening charge pump circuit are realized, but improve voltage-controlled shake
Larger noise can be introduced by swinging the tuning sensitivity of device, to ensure the noise characteristic of phaselocked loop, can improve charge pump tuning electricity
The dynamic range of pressure, this requires operational amplifiers can realize rail-to-rail input-output characteristic, further increases charge pump
The design difficulty of circuit.
Utility model content
The utility model provides a kind of wide dynamic range applied to phaselocked loop low mismatch charge pump circuit, realizes width
The charge pump circuit of the low mismatch of dynamic output range, can be directly applied for the application of phase-locked loop circuit.
To solve the above problems, the utility model is achieved through the following technical solutions：
The low mismatch charge pump circuit of wide dynamic range applied to phaselocked loop, by biasing module, current mirror module and charge and discharge
Electric matching module composition；The biasing module comes bias current mirror module and charge and discharge matching module for generating bias current；
The current mirror module is provided charging current and electric discharge electricity in biasing and mirror image generation charge and discharge matching module by biasing module
Stream；The charge and discharge matching module includes charging control unit, charhing unit, discharge cell and control of discharge unit；Charging control
Unit processed is used to detect the output voltage of charge pump, and according to the output voltage control charhing unit, to realize charging current
Control；Control of discharge unit is used to detect the output voltage of charge pump, and according to the output voltage control discharge cell, to realize
The control of discharge current；Charhing unit charges to load；Discharge cell discharges to load.
Charging control unit is made of metal-oxide-semiconductor M12, M13, M15, M23, M24, M27 and M29；Wherein metal-oxide-semiconductor M13, M15,
M24, M27 are PMOS tube, and metal-oxide-semiconductor M12, M23, M29 are NMOS tube；The drain electrode of NMOS tube M12 and the source electrode of PMOS tube M13 with
Power vd D connections；The grid connection positive charge signal UP of NMOS tube M12；The leakage of the source electrode and PMOS tube M13 of NMOS tube M12
After the connection of pole, then it connect with the grid of PMOS tube M15；The grid of PMOS tube M13 is connect with reverse charging signal UPB；NMOS tube
M12 and PMOS tube M13 constitute transmission gate, are turned on or off by charging signals UP and its reverse signal UPB controls；PMOS tube M15
Drain electrode connect with charhing unit；After the source electrode of NMOS tube M23 is connect with the drain electrode of PMOS tube M24, then the grid with PMOS tube M15
Pole connects；The grid connection reverse charging signal UPB of NMOS tube M23；The drain electrode of NMOS tube M23 connects with the source electrode of PMOS tube M24
After connecing, then it connect with the drain electrode of PMOS tube M27；The grid connection positive charge signal UP of PMOS tube M24；NMOS tube M23 and
PMOS tube M24 constitutes transmission gate, is turned on or off by charging signals UP and its reverse signal UPB controls；The source electrode of PMOS tube M27
Connect power vd D；The drain electrode of PMOS tube M27 is connect with the drain electrode of NMOS tube M29；The grid of PMOS tube M27 and the M33 of NMOS tube
Grid connection after, reconnect charge pump outputs Vctrl；The grid of NMOS tube M29 connects current mirror module；NMOS tube M29
Source electrode connection ground terminal VSS.
Charhing unit is made of metal-oxide-semiconductor M14, M16 and M17；Wherein metal-oxide-semiconductor M14, M16, M17 is PMOS tube；PMOS tube
The source electrode connection power vd D of M14；The grid connection ground terminal VSS of PMOS tube M14；The drain electrode of PMOS tube M14 is with PMOS tube M16's
Source electrode connects；After the grid of PMOS tube M16 is connect with the grid of PMOS tube M17, then it connect with the drain electrode of PMOS tube M16；PMOS
The drain electrode of pipe M16 connects current mirror module；The source electrode of PMOS tube M17 connects charging control unit；The drain electrode of PMOS tube M17 connects
Charge pump outputs Vctrl.
Control of discharge unit is made of metal-oxide-semiconductor M20, M21, M22, M25, M26, M31 and M33；Wherein metal-oxide-semiconductor M22, M25,
M31 is PMOS tube, and metal-oxide-semiconductor M20, M21, M26, M33 are NMOS tube；The drain electrode of PMOS tube M22 and the source electrode of NMOS tube M21 with
Ground terminal VSS connections；The positive discharge signal DN of grid connection of PMOS tube M22；The leakage of the source electrode and NMOS tube M21 of PMOS tube M22
After the connection of pole, then it connect with the grid of NMOS tube M20；The grid of NMOS tube M21 is connect with back discharge signal DNB；NMOS tube
M21 and PMOS tube M22 constitute transmission gate, are turned on or off by discharge signal DN and its reverse signal DNB controls；NMOS tube M20
Drain electrode connect with discharge cell；After the source electrode of PMOS tube M25 is connect with the drain electrode of NMOS tube M26, then the grid with NMOS tube M20
Pole connects；The grid connection back discharge signal DNB of PMOS tube M25；The drain electrode of PMOS tube M25 connects with the source electrode of NMOS tube M26
After connecing, then it connect with the drain electrode of NMOS tube M33；The positive discharge signal DN of grid connection of NMOS tube M26；NMOS tube M26 and
PMOS tube M25 constitutes transmission gate, is turned on or off by discharge signal DN and its reverse signal DNB controls；The source electrode of NMOS tube M33
Connect ground terminal VSS；The drain electrode of NMOS tube M33 is connect with the drain electrode of PMOS tube M31；The grid of PMOS tube M27 and the M33 of NMOS tube
Grid connection after, reconnect charge pump outputs Vctrl；The grid of PMOS tube M31 connects current mirror module；NMOS tube M31
Source electrode connection power vd D.
Discharge cell includes metal-oxide-semiconductor M9, M10 and M18；Wherein metal-oxide-semiconductor M9, M10, M18 is NMOS tube；NMOS tube M10's
Source electrode connects ground terminal VSS；The grid connection power vd D of NMOS tube M10；The drain electrode of NMOS tube M10 connects with the source electrode of NMOS tube M9
It connects；After the grid of NMOS tube M9 is connect with the grid of NMOS tube M18, then it connect with the drain electrode of NMOS tube M9；The leakage of NMOS tube M9
Pole connects current mirror module；The source electrode of NMOS tube M18 connects control of discharge unit；The drain electrode connection charge pump of NMOS tube M18 is defeated
Outlet Vctrl.
Biasing module is made of metal-oxide-semiconductor M1, M2, M3, M4, M5, M6 and resistance R1；Wherein metal-oxide-semiconductor M1, metal-oxide-semiconductor M2 are
PMOS tube, metal-oxide-semiconductor M3, metal-oxide-semiconductor M4, metal-oxide-semiconductor M5, metal-oxide-semiconductor M6 are NMOS tube；The source electrode of PMOS tube M1, M2 connects with power vd D
It connects；It is defeated with current mirror module after the grid of PMOS tube M1 and PMOS tube M2 are connected with the drain electrode of PMOS tube M1 and PMOS tube M3
Enter end connection；After the drain electrode of PMOS tube M2 is connect with the drain electrode of NMOS tube M4, then with the grid of NMOS tube M3 and NMOS tube M4 connect
It connects；The source electrode of NMOS tube M3 is connect with the drain electrode of NMOS tube M5；After the source electrode of NMOS tube M4 is connect with the drain electrode of NMOS tube M6, then
It is connect with the grid of NMOS tube M6 and NMOS tube M5；The source electrode connection ground terminal VSS of NMOS tube M6；The source electrode of NMOS tube M5 passes through electricity
Resistance R1 is connect with ground terminal VSS.
Current mirror module is made of metal-oxide-semiconductor M7, M8, M11, M19, M28, M30, M32, M34, M35 and M36；Wherein metal-oxide-semiconductor
M7, M8, M28, M32, M35 are PMOS tube, and metal-oxide-semiconductor M11, M19, M30, M34, M36 are NMOS tube；PMOS tube M7, M8, M28,
The source electrode of M35 is connect with power vd D；After the grid of PMOS tube M7, M8, M28, M35 are connected, it is connect with biasing module；PMOS
The drain electrode of pipe M7 is connect with charge and discharge matching module, and constant-current source is provided for the discharge cell in charge and discharge matching module；PMOS tube
After the drain electrode of M8 is connect with the drain electrode of NMOS tube M11, then it connect with the grid of NMOS tube M11；NMOS tube M11, M19, M34, M36
Source electrode connect with ground terminal VSS；The grid of NMOS tube M19 is connect with the grid of NMOS tube M11；The drain electrode of NMOS tube M19 with
Charge and discharge matching module connects, and constant-current source is provided for the charhing unit in charge and discharge matching module；The drain electrode of PMOS tube M28 with
After the drain electrode connection of NMOS tube M30, then it connect with the grid of NMOS tube M30；The grid of NMOS tube M30 and charge and discharge matching module
Connection, bias voltage is provided for the charging control unit in charge and discharge matching module；The source electrode of NMOS tube M30 connects with ground terminal VSS
It connects；After the drain electrode of PMOS tube M35 is connect with the drain electrode of NMOS tube M36, then it connect with the grid of NMOS tube M36；NMOS tube M34's
It drains after being connect with the drain electrode of PMOS tube M32, then connect with the grid of PMOS tube M32；The grid of PMOS tube M32 and charge and discharge
It is connected with module, bias voltage is provided for the control of discharge unit in charge and discharge matching module；The source electrode and power supply of PMOS tube M32
VDD connections.
Compared with prior art, the utility model has following features：
1, the utility model by output voltage by feeding back to charge-discharge control unit so that charge pump is in very wide voltage
Charging current and discharge current matching in output area；
2, current mirror module and charge/discharge unit effectively reduce the current mismatch that channel-length modulation is brought so that
Charging current and discharge current matching precision are high, while having certain flatness；
3, charge pump circuit is not necessarily to additional operational amplification circuit, and circuit structure is simple, and stability is good, low in energy consumption, is easy to
It is integrated.
Description of the drawings
Fig. 1 is the structure diagram of the utility model charge pump circuit.
Fig. 2 is the circuit diagram of the utility model charge pump circuit.
Fig. 3 is the charging current of the utility model charge pump and the mismatch analogous diagram of discharge current.
Fig. 4 is the transient response figure that the utility model is applied to phaselocked loop.
Specific implementation mode
To make the purpose of this utility model, technical solution and advantage be more clearly understood, below in conjunction with specific example, and join
According to attached drawing, the utility model is further described.
A kind of low mismatch charge pump circuit of wide dynamic range applied to phaselocked loop, as illustrated in fig. 1 and 2, by biasing module,
Current mirror module and charge and discharge matching module composition.
The biasing module comes bias current mirror module and charge and discharge matching module for generating bias current.Biasing module
It is made of metal-oxide-semiconductor M1, M2, M3, M4, M5, M6 and resistance R1.Wherein metal-oxide-semiconductor M1, metal-oxide-semiconductor M2 are PMOS tube；Metal-oxide-semiconductor M3, MOS
Pipe M4, metal-oxide-semiconductor M5, metal-oxide-semiconductor M6 are NMOS tube.The source electrode of PMOS tube M1, M2 is connect with power vd D.The grid of PMOS tube M1
It is connect again with the drain electrode of PMOS tube M1 and PMOS tube M3 after being connect with the grid of PMOS tube M2.The drain electrode of PMOS tube M1 and current mirror
Module connects, and bias voltage is provided for current mirror module.The drain electrode of PMOS tube M2 connect with the drain electrode of NMOS tube M4 after again with
NMOS tube M3 is connected with the grid of NMOS tube M4.The source electrode of NMOS tube M3 is connect with the drain electrode of NMOS tube M5.The source of NMOS tube M4
It is connect again with the grid of NMOS tube M6 and NMOS tube M5 after pole and the drain electrode connection of NMOS tube M6.The source electrode connection ground of NMOS tube M6
Hold VSS.The source electrode of NMOS tube M5 is connect by resistance R1 with ground terminal VSS, can adjust branch current by resistance R1.
The current mirror module is provided the charging current in biasing and mirror image generation charge and discharge matching module by biasing module
And discharge current.Current mirror module is made of metal-oxide-semiconductor M7, M8, M11, M19, M28, M30, M32, M34, M35, M36.Wherein MOS
Pipe M7, M8, M28, M32, M35 are PMOS tube, and metal-oxide-semiconductor M11, M19, M30, M34, M36 are NMOS tube.PMOS tube M7, M8, M28,
The source electrode of M35 is connect with power vd D.The grid of PMOS tube M7, M8, M28, M35 are connect with biasing module, are biased from prime
Module replica current in proportion.The drain electrode of PMOS tube M7 is connect with charge and discharge matching module, for putting in charge and discharge matching module
Electric unit provides constant-current source.Connect again with the grid of NMOS tube M11 after the drain electrode of PMOS tube M8 and the drain electrode connection of NMOS tube M11
It connects.The source electrode of NMOS tube M11, M19, M34, M36 are connect with ground terminal VSS.The grid of the grid and NMOS tube M11 of NMOS tube M19
Pole connects.The drain electrode of NMOS tube M19 is connect with charge and discharge matching module, and perseverance is provided for the charhing unit in charge and discharge matching module
Stream source.It is connect again with the grid of NMOS tube M30 after the drain electrode of PMOS tube M28 and the drain electrode connection of NMOS tube M30.NMOS tube M30
Grid connect with charge and discharge matching module, provide suitable biased electrical for the charging control unit in charge and discharge matching module
Pressure.The source electrode of NMOS tube M30 is connect with ground terminal VSS.The drain electrode of PMOS tube M35 connect with the drain electrode of NMOS tube M36 after again with
The grid of NMOS tube M36 connects.Grid with PMOS tube M32 again after the drain electrode of NMOS tube M34 and the drain electrode of PMOS tube M32 connect
Connection.The grid of PMOS tube M32 is connect with charge and discharge matching module, is provided for the control of discharge unit in charge and discharge matching module
Suitable bias voltage.The source electrode of PMOS tube M32 is connect with power vd D.
The charge and discharge matching module includes charging control unit, charhing unit, discharge cell and control of discharge unit.It fills
Electric control unit is used to detect the output voltage of charge pump, and according to the output voltage control charhing unit, to realize charging electricity
The control of stream.Control of discharge unit is used to detect the output voltage of charge pump, and according to the output voltage control discharge cell, with
Realize the control of discharge current.Charhing unit charges to load.Discharge cell discharges to load.
Charging control unit is made of metal-oxide-semiconductor M12, M13, M15, M23, M24, M27, M29.Wherein metal-oxide-semiconductor M13, M15,
M24, M27 are PMOS tube, and metal-oxide-semiconductor M12, M23, M29 are NMOS tube.The drain electrode of NMOS tube M12 and the source electrode of PMOS tube M13 with
Power vd D connections.The grid connection charging signals UP of NMOS tube M12.The source electrode of NMOS tube M12 connects with the drain electrode of PMOS tube M13
It is connect again with the grid of PMOS tube M15 after connecing, the grid of PMOS tube M13 is connect with the reverse signal UPB of charging signals UP.NMOS
Pipe M12 and PMOS tube M13 constitute transmission gate, are turned on or off by charging signals UP and its reverse signal UPB controls.PMOS tube
The drain electrode of M15 is connect with charhing unit.Again with PMOS tube M15's after the drain electrode connection of the source electrode and PMOS tube M24 of NMOS tube M23
Grid connects.The reverse signal UPB of the grid connection charging signals UP of NMOS tube M23.The drain electrode of NMOS tube M23 and PMOS tube
It is connect again with the drain electrode of PMOS tube M27 after the source electrode connection of M24.The grid of PMOS tube M24 connects charging signals UP, NMOS tube
M23 and PMOS tube M24 constitute transmission gate, are turned on or off by charging signals UP and its reverse signal UPB controls.PMOS tube M27
Source electrode connection power vd D.The drain electrode of PMOS tube M27 is connect with the drain electrode of NMOS tube M29.The grid and NMOS of PMOS tube M27
Reconnect output Vctrl after the grid connection of the M33 of pipe, by charge pump output voltage Vctrl is fed back to the grid of M15 into
And adjust charging current.The grid of NMOS tube M29 connects current mirror module, and bias voltage is provided by current mirror module.NMOS tube
The source electrode connection ground terminal VSS of M29.As UP=1 (UPB=0), it is made of M23, M24 the transmission gate conducting that M12, M13 are constituted
Transmission gate disconnect, the grid of PMOS tube M15 is pulled to high potential VDD, causes PMOS tube M15 to be in cut-off state, at this point, electric
Lotus pump electric discharge.As UP=0 (when UPB=1), is disconnected by the transmission gate that M12, M13 are constituted, led by the transmission gate that M23, M24 are constituted
Logical, charge pump outputs Vctrl controls M15 grid voltages by feedback unit, and then adjusts charging current.
Charhing unit is made of metal-oxide-semiconductor M14, M16, M17, wherein metal-oxide-semiconductor M14, M16, M17 are PMOS tube.PMOS tube
The source electrode connection power vd D of M14.The grid connection ground terminal VSS of PMOS tube M14.The drain electrode of PMOS tube M14 is with PMOS tube M16's
Source electrode connects.The grid of PMOS tube M16 is connect with the drain electrode of PMOS tube M16 again after being connect with the grid of PMOS tube M17, by constant current
Source copies to charging paths.The drain electrode of PMOS tube M16 connects current mirror module, and mirror current source is provided by current mirror module.
The source electrode of PMOS tube M17 connects charging control unit.The drain electrode connection output end Vctrl of PMOS tube M17.
Discharge cell includes metal-oxide-semiconductor M9, M10, M18, wherein metal-oxide-semiconductor M9, M10, M18 are NMOS tube.NMOS tube M10's
Source electrode connects ground terminal VSS.The grid connection power vd D of NMOS tube M10.The drain electrode of NMOS tube M10 connects with the source electrode of NMOS tube M9
It connects.The grid of NMOS tube M9 is connect with the drain electrode of NMOS tube M9 again after being connect with the grid of NMOS tube M18, and constant-current source is copied to
Discharge paths.The drain electrode of NMOS tube M9 connects current mirror module, and mirror current source is provided by current mirror module.NMOS tube M18's
Source electrode connects control of discharge unit.The drain electrode connection output end Vctrl of NMOS tube M18.
Control of discharge unit is made of metal-oxide-semiconductor M21, M22, M20, M25, M26, M31, M33, wherein metal-oxide-semiconductor M22, M25,
M31 is PMOS tube, and metal-oxide-semiconductor M21, M20, M26, M33 are NMOS tube.The drain electrode of PMOS tube M22 and the source electrode of NMOS tube M21 with
Ground terminal VSS connections.The grid connection discharge signal DN of PMOS tube M22.The source electrode of PMOS tube M22 connects with the drain electrode of NMOS tube M21
It is connect again with the grid of NMOS tube M20 after connecing.The grid of NMOS tube M21 is connect with the reverse signal DNB of discharge signal DN.NMOS
Pipe M21 and PMOS tube M22 constitute transmission gate, are turned on or off by discharge signal DN and its reverse signal DNB controls.NMOS tube
The drain electrode of M20 is connect with discharge cell.Again with NMOS tube M20's after the drain electrode connection of the source electrode and NMOS tube M26 of PMOS tube M25
Grid connects.The reverse signal DNB of the grid connection discharge signal DN of PMOS tube M25.The drain electrode of PMOS tube M25 and NMOS tube
It is connect again with the drain electrode of NMOS tube M33 after the source electrode connection of M26.The grid connection discharge signal DN of NMOS tube M26.NMOS tube
M26 and PMOS tube M25 constitute transmission gate, are turned on or off by discharge signal DN and its reverse signal DNB controls.NMOS tube M33
Source electrode connection ground terminal VSS.The drain electrode of NMOS tube M33 is connect with the drain electrode of PMOS tube M31.The grid and NMOS of PMOS tube M27
Output Vctrl is reconnected after the grid connection of the M33 of pipe.By charge pump output voltage Vctrl is fed back to the grid of M20 into
And adjust discharge current.The grid of PMOS tube M31 connects current mirror module.Bias voltage is provided by current mirror module.NMOS tube
The source electrode connection power vd D of M31.As DN=1 (DNB=0), disconnected by the transmission gate that M21, M22 are constituted, by M25, M26 structure
At transmission gate conducting, charge pump outputs voltage Vctrl by feedback unit control M20 grid voltages, and then adjust electric discharge
Electric current.As DN=0 (when DNB=1), the transmission gate conducting being made of M21, M22 is disconnected by the transmission gate that M21, M22 are constituted,
The grid of NMOS tube M20 is pulled to low potential VSS, and NMOS tube M20 is caused to be in cut-off state, at this point, charge pump charges.
The utility model can using charge pump output voltage to the feedback effect of charge/discharge unit using CMOS technology
Realize charging and discharging currents matching within the scope of wide dynamic output voltage, i.e., by feedback so that the matching of charging current and discharge current
Range broadens.Such as the mismatch analogous diagram of charging current and discharge current that Fig. 3 is charge pump circuit, used from the figure 3, it may be seen that working as
TSMC 0.18um techniques, and supply voltage be 1.8V when, charge pump output voltage ranging from 0.08V~1.75V, charging current
It is less than 4% with the mismatch error of discharge current.As Fig. 4 be transient response figure of the charge pump applications in phase-locked loop circuit (wherein
Voltage controlled oscillator and frequency divider are ideal model), known by Fig. 4, which can realize normal charging/discharging function.This
Outside, the utility model proposes charge pump be not necessarily to additional operational amplifier, will not be by the bandwidth and stabilization of operational amplifier
Property influence, and circuit structure is simple, is easily integrated, and is suitable for High-Performance Phase-Locked circuit.
It should be noted that although the above embodiment described in the utility model is illustrative, this is not to this
The limitation of utility model, therefore the utility model is not limited in above-mentioned specific implementation mode.The utility model is not being departed from
In the case of principle, the other embodiment that every those skilled in the art obtain under the enlightenment of the utility model is accordingly to be regarded as
Within the protection of the utility model.
Claims (7)
1. the low mismatch charge pump circuit of wide dynamic range applied to phaselocked loop, characterized in that by biasing module, current mirror module
It is formed with charge and discharge matching module；
The biasing module comes bias current mirror module and charge and discharge matching module for generating bias current；
The current mirror module is provided the charging current in biasing and mirror image generation charge and discharge matching module by biasing module and is put
Electric current；
The charge and discharge matching module includes charging control unit, charhing unit, discharge cell and control of discharge unit；Charging control
Unit processed is used to detect the output voltage of charge pump, and according to the output voltage control charhing unit, to realize charging current
Control；Control of discharge unit is used to detect the output voltage of charge pump, and according to the output voltage control discharge cell, to realize
The control of discharge current；Charhing unit charges to load；Discharge cell discharges to load.
2. the low mismatch charge pump circuit of the wide dynamic range according to claim 1 applied to phaselocked loop, characterized in that
Charging control unit is made of metal-oxide-semiconductor M12, M13, M15, M23, M24, M27 and M29；Wherein metal-oxide-semiconductor M13, M15, M24,
M27 is PMOS tube, and metal-oxide-semiconductor M12, M23, M29 are NMOS tube；
The drain electrode of NMOS tube M12 and the source electrode of PMOS tube M13 are connect with power vd D；The grid connection forward direction of NMOS tube M12 is filled
Electric signal UP；After the source electrode of NMOS tube M12 is connect with the drain electrode of PMOS tube M13, then it connect with the grid of PMOS tube M15；PMOS
The grid of pipe M13 is connect with reverse charging signal UPB；NMOS tube M12 and PMOS tube M13 constitute transmission gate, by charging signals UP
And its reverse signal UPB controls are turned on or off；The drain electrode of PMOS tube M15 is connect with charhing unit；The source electrode of NMOS tube M23 with
After the drain electrode connection of PMOS tube M24, then it connect with the grid of PMOS tube M15；The grid of NMOS tube M23 connects reverse charging signal
UPB；After the drain electrode of NMOS tube M23 is connect with the source electrode of PMOS tube M24, then it connect with the drain electrode of PMOS tube M27；PMOS tube M24
Grid connection positive charge signal UP；NMOS tube M23 and PMOS tube M24 constitute transmission gate, by charging signals UP and its reversely
Signal UPB controls are turned on or off；The source electrode connection power vd D of PMOS tube M27；The drain electrode of PMOS tube M27 is with NMOS tube M29's
Drain electrode connection；After the connection of the grid of the grid of PMOS tube M27 and the M33 of NMOS tube, charge pump outputs Vctrl is reconnected；
The grid of NMOS tube M29 connects current mirror module；The source electrode connection ground terminal VSS of NMOS tube M29.
3. the low mismatch charge pump circuit of the wide dynamic range according to claim 1 applied to phaselocked loop, characterized in that
Charhing unit is made of metal-oxide-semiconductor M14, M16 and M17；Wherein metal-oxide-semiconductor M14, M16, M17 is PMOS tube；
The source electrode connection power vd D of PMOS tube M14；The grid connection ground terminal VSS of PMOS tube M14；The drain electrode of PMOS tube M14 with
The source electrode of PMOS tube M16 connects；After the grid of PMOS tube M16 is connect with the grid of PMOS tube M17, then the leakage with PMOS tube M16
Pole connects；The drain electrode of PMOS tube M16 connects current mirror module；The source electrode of PMOS tube M17 connects charging control unit；PMOS tube
The drain electrode connection charge pump outputs Vctrl of M17.
4. the low mismatch charge pump circuit of the wide dynamic range according to claim 1 applied to phaselocked loop, characterized in that
Control of discharge unit is made of metal-oxide-semiconductor M20, M21, M22, M25, M26, M31 and M33；Wherein metal-oxide-semiconductor M22, M25, M31
For PMOS tube, metal-oxide-semiconductor M20, M21, M26, M33 are NMOS tube；
The drain electrode of PMOS tube M22 and the source electrode of NMOS tube M21 are connect with ground terminal VSS；The grid connection forward direction of PMOS tube M22 is put
Electric signal DN；After the source electrode of PMOS tube M22 is connect with the drain electrode of NMOS tube M21, then it connect with the grid of NMOS tube M20；NMOS
The grid of pipe M21 is connect with back discharge signal DNB；NMOS tube M21 and PMOS tube M22 constitute transmission gate, by discharge signal DN
And its reverse signal DNB controls are turned on or off；The drain electrode of NMOS tube M20 is connect with discharge cell；The source electrode of PMOS tube M25 with
After the drain electrode connection of NMOS tube M26, then it connect with the grid of NMOS tube M20；The grid of PMOS tube M25 connects back discharge signal
DNB；After the drain electrode of PMOS tube M25 is connect with the source electrode of NMOS tube M26, then it connect with the drain electrode of NMOS tube M33；NMOS tube M26
The positive discharge signal DN of grid connection；NMOS tube M26 and PMOS tube M25 constitute transmission gate, by discharge signal DN and its reversely
Signal DNB controls are turned on or off；The source electrode connection ground terminal VSS of NMOS tube M33；The drain electrode of NMOS tube M33 is with PMOS tube M31's
Drain electrode connection；After the connection of the grid of the grid of PMOS tube M27 and the M33 of NMOS tube, charge pump outputs Vctrl is reconnected；
The grid of PMOS tube M31 connects current mirror module；The source electrode connection power vd D of NMOS tube M31.
5. the low mismatch charge pump circuit of the wide dynamic range according to claim 1 applied to phaselocked loop, characterized in that
Discharge cell includes metal-oxide-semiconductor M9, M10 and M18；Wherein metal-oxide-semiconductor M9, M10, M18 is NMOS tube；
The source electrode connection ground terminal VSS of NMOS tube M10；The grid connection power vd D of NMOS tube M10；The drain electrode of NMOS tube M10 with
The source electrode of NMOS tube M9 connects；After the grid of NMOS tube M9 is connect with the grid of NMOS tube M18, then the drain electrode company with NMOS tube M9
It connects；The drain electrode of NMOS tube M9 connects current mirror module；The source electrode of NMOS tube M18 connects control of discharge unit；The leakage of NMOS tube M18
Pole connects charge pump outputs Vctrl.
6. the low mismatch charge pump circuit of the wide dynamic range according to claim 1 applied to phaselocked loop, characterized in that
Biasing module is made of metal-oxide-semiconductor M1, M2, M3, M4, M5, M6 and resistance R1；Wherein metal-oxide-semiconductor M1, metal-oxide-semiconductor M2 are PMOS tube,
Metal-oxide-semiconductor M3, metal-oxide-semiconductor M4, metal-oxide-semiconductor M5, metal-oxide-semiconductor M6 are NMOS tube；
The source electrode of PMOS tube M1, M2 is connect with power vd D；The grid of PMOS tube M1 and PMOS tube M2 and PMOS tube M1 and PMOS
After the drain electrode of pipe M3 is connected, it is connect with the input terminal of current mirror module；The drain electrode of PMOS tube M2 is connect with the drain electrode of NMOS tube M4
Afterwards, then with the grid of NMOS tube M3 and NMOS tube M4 it connect；The source electrode of NMOS tube M3 is connect with the drain electrode of NMOS tube M5；NMOS tube
After the source electrode of M4 is connect with the drain electrode of NMOS tube M6, then it connect with the grid of NMOS tube M6 and NMOS tube M5；The source of NMOS tube M6
Pole connects ground terminal VSS；The source electrode of NMOS tube M5 is connect by resistance R1 with ground terminal VSS.
7. the low mismatch charge pump circuit of the wide dynamic range according to claim 1 applied to phaselocked loop, characterized in that
Current mirror module is made of metal-oxide-semiconductor M7, M8, M11, M19, M28, M30, M32, M34, M35 and M36；Wherein metal-oxide-semiconductor M7,
M8, M28, M32, M35 are PMOS tube, and metal-oxide-semiconductor M11, M19, M30, M34, M36 are NMOS tube；
The source electrode of PMOS tube M7, M8, M28, M35 are connect with power vd D；After the grid of PMOS tube M7, M8, M28, M35 are connected,
It is connect with biasing module；The drain electrode of PMOS tube M7 is connect with charge and discharge matching module, is the electric discharge list in charge and discharge matching module
Member provides constant-current source；After the drain electrode of PMOS tube M8 is connect with the drain electrode of NMOS tube M11, then it connect with the grid of NMOS tube M11；
The source electrode of NMOS tube M11, M19, M34, M36 are connect with ground terminal VSS；The grid of NMOS tube M19 connects with the grid of NMOS tube M11
It connects；The drain electrode of NMOS tube M19 is connect with charge and discharge matching module, and constant current is provided for the charhing unit in charge and discharge matching module
Source；After the drain electrode of PMOS tube M28 is connect with the drain electrode of NMOS tube M30, then it connect with the grid of NMOS tube M30；NMOS tube M30's
Grid is connect with charge and discharge matching module, and bias voltage is provided for the charging control unit in charge and discharge matching module；NMOS tube
The source electrode of M30 is connect with ground terminal VSS；After the drain electrode of PMOS tube M35 is connect with the drain electrode of NMOS tube M36, then with NMOS tube M36's
Grid connects；After the drain electrode of NMOS tube M34 is connect with the drain electrode of PMOS tube M32, then it connect with the grid of PMOS tube M32；PMOS
The grid of pipe M32 is connect with charge and discharge matching module, and bias voltage is provided for the control of discharge unit in charge and discharge matching module；
The source electrode of PMOS tube M32 is connect with power vd D.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821259187.7U CN208079046U (en) | 2018-08-06 | 2018-08-06 | The low mismatch charge pump circuit of wide dynamic range applied to phaselocked loop |
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| CN201821259187.7U CN208079046U (en) | 2018-08-06 | 2018-08-06 | The low mismatch charge pump circuit of wide dynamic range applied to phaselocked loop |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108712170A (en) * | 2018-08-06 | 2018-10-26 | 桂林电子科技大学 | The low mismatch charge pump circuit of wide dynamic range applied to phaselocked loop |
| CN114756081A (en) * | 2022-05-26 | 2022-07-15 | 中国人民解放军国防科技大学 | NMOS isolation type low dropout linear regulator in self-synchronizing system |
-
2018
- 2018-08-06 CN CN201821259187.7U patent/CN208079046U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108712170A (en) * | 2018-08-06 | 2018-10-26 | 桂林电子科技大学 | The low mismatch charge pump circuit of wide dynamic range applied to phaselocked loop |
| CN108712170B (en) * | 2018-08-06 | 2024-01-26 | 桂林电子科技大学 | Wide dynamic range low mismatch charge pump circuit applied to phase-locked loop |
| CN114756081A (en) * | 2022-05-26 | 2022-07-15 | 中国人民解放军国防科技大学 | NMOS isolation type low dropout linear regulator in self-synchronizing system |
| CN114756081B (en) * | 2022-05-26 | 2024-03-19 | 中国人民解放军国防科技大学 | NMOS isolation type low dropout linear voltage regulator in self-synchronizing system |
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