CN113707194A - Termination voltage regulation device with transient response enhancement - Google Patents
Termination voltage regulation device with transient response enhancement Download PDFInfo
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C5/00—Details of stores covered by group G11C11/00
- G11C5/14—Power supply arrangements, e.g. power down, chip selection or deselection, layout of wirings or power grids, or multiple supply levels
- G11C5/147—Voltage reference generators, voltage or current regulators; Internally lowered supply levels; Compensation for voltage drops
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/10—Regulating voltage or current
- G05F1/46—Regulating voltage or current wherein the variable actually regulated by the final control device is dc
- G05F1/56—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices
- G05F1/565—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor
- G05F1/569—Regulating voltage or current wherein the variable actually regulated by the final control device is dc using semiconductor devices in series with the load as final control devices sensing a condition of the system or its load in addition to means responsive to deviations in the output of the system, e.g. current, voltage, power factor for protection
Abstract
The invention discloses a termination voltage regulating device with transient response enhancement, which comprises a termination voltage regulator and a transient response enhancer. The termination voltage regulator provides a termination voltage at a termination voltage terminal and includes first and second switching units. The transient response enhancer is coupled to the terminal voltage regulator and is used for enhancing the transient response of the terminal voltage regulator. The transient response enhancer includes a first enhancement circuit for sensing a first signal associated with the first switching unit and for causing the first control terminal of the first switching unit to be at a first voltage in response to the first signal in a draw mode; and a second boost circuit for sensing a second signal associated with the second switching cell and for causing the second control terminal of the second switching cell to be at a second voltage in response to the second signal in the providing mode.
Description
Technical Field
The present invention relates to a termination voltage regulator, and more particularly, to a termination voltage regulator with transient response enhancement.
Background
Termination voltage regulators are specifically designed for termination (termination) of buses, such as memory buses used for double data rate memory technology. A termination voltage regulator is required to provide the termination voltage and to provide and draw current. The transient response may be affected by the operating speed of the termination voltage regulator. If the transient response overshoot and undershoot cannot be reduced within the respective tolerance ranges, the computing system with memory may be unstable or fail in the worst case.
Therefore, in order to improve the transient response of the end voltage regulator, the operating speed of the regulator is to be improved.
Disclosure of Invention
It is an object of the present invention to provide a termination voltage regulation device with transient response enhancement.
To achieve at least the above objects, the present disclosure provides a termination voltage regulator with transient response enhancement, which includes a termination voltage regulator and a transient response enhancer. The termination voltage regulator is used for providing a termination voltage at a termination voltage terminal and comprises a first switch unit and a second switch unit which are coupled to the termination voltage terminal. The transient response enhancer is coupled to the termination voltage regulator for enhancing a transient response of the termination voltage regulator, the transient response enhancer including a first enhancing circuit and a second enhancing circuit. The first boost circuit is coupled to at least the first switch unit for sensing a first signal associated with the first switch unit, wherein in a draw mode, the first boost circuit causes the first control terminal of the first switch unit to be at a first voltage in response to the first signal when the second switch unit is operable to draw current from the termination voltage terminal. A second boost circuit coupled to at least the second switch unit for sensing a second signal associated with the second switch unit, wherein in a supply mode, the second boost circuit causes the second control terminal of the second switch unit to be at a second voltage in response to the second signal when the first switch unit is operable to supply current to the termination voltage terminal.
Optionally, wherein the first boost circuit has a first sense terminal coupled to the first terminal of the first switch unit and has a first feedback terminal coupled to the first control terminal of the first switch unit.
Optionally, wherein the termination voltage regulator further comprises: a control unit coupled to the first control terminal and the second control terminal for selectively turning on the first switching unit and the second switching unit based on the termination voltage and a termination reference voltage.
Optionally, wherein the first feedback terminal is connected to a first control terminal of the first switching unit; in the draw mode, the control unit turns on the second switch unit to draw current from the termination voltage terminal, and the first boost circuit causes the first control terminal to be at the first voltage through the first feedback terminal.
Optionally, wherein the first feedback terminal is connected to the control unit; in the draw mode, the control unit turns on the second switching unit to draw current from the termination voltage terminal, and the first boost circuit causes the control unit to provide the first voltage through the first feedback terminal to bring the first control terminal to the first voltage.
Optionally, wherein the first boost circuit comprises: a first sensing unit having a sensing control terminal coupled to the first feedback terminal, a first terminal coupled to the first sensing terminal, and a second terminal for receiving a first bias signal, wherein the first sensing unit is for sensing the first signal, which is representative of a current of the first switching unit; a first feedback unit coupled to the first feedback terminal and the second terminal of the first sensing unit for feeding back a signal to the first control terminal; and a first compensation unit coupled to the first feedback terminal and the second terminal of the first sensing unit for stabilizing a circuit.
Optionally, wherein the second boost circuit has a second sense terminal coupled to the first terminal of the second switch unit, and a second feedback terminal coupled to the second control terminal of the second switch unit.
Optionally, the termination voltage regulator further includes a control unit coupled to the first control terminal and the second control terminal for selectively turning on the first switch unit and the second switch unit based on the termination voltage and a termination reference voltage.
Optionally, wherein the second feedback terminal is connected to a second control terminal of the second switching unit; in the supply mode, the control unit turns on the first switching unit to supply a current to the termination voltage terminal, and the second boost circuit makes the second control terminal at the second voltage through the second feedback terminal.
Optionally, wherein the second feedback terminal is connected to the control unit; in the supply mode, the control unit turns on the first switching unit to supply a current to the termination voltage terminal, and the second boost circuit causes the control unit to supply the second voltage through the second feedback terminal to bring the second control terminal to the second voltage.
Optionally, wherein the second boost circuit comprises: a second sensing unit having a sensing control terminal coupled to the second feedback terminal, a first terminal coupled to the second sensing terminal, and a second terminal for receiving a second bias signal, wherein the second sensing unit is for sensing the second signal, which is representative of a current of the second switching unit; a second feedback unit coupled to the second feedback terminal and the second terminal of the second sensing unit, for feeding back a signal to the second control terminal; and
a second compensation unit coupled to the second feedback terminal and the second terminal of the second sensing unit for stabilizing a circuit.
For a better understanding of the nature and technical content of the present invention, reference should be made to the following detailed description of the invention and the accompanying drawings, which are provided for illustration purposes only and are not intended to limit the scope of the invention.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive labor.
FIG. 1 is a schematic diagram illustrating a termination voltage regulation device with transient response enhancement according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an embodiment of a termination voltage adjustment device based on FIG. 1;
FIG. 3 is a schematic diagram illustrating an embodiment of a first boost circuit;
FIG. 4 is a schematic diagram illustrating an embodiment of a second boost circuit;
fig. 5 is a schematic diagram of another embodiment of the termination voltage adjustment device based on fig. 1.
Description of reference numerals:
10-terminal voltage regulating device
11 terminal connection voltage regulator
21 transient response enhancer
110 first switch unit
120 second switch unit
130 control unit
131 comparator
132 comparator
210 first boost circuit
211 first sensing unit
212 first feedback unit
213 first compensation unit
220 second boost circuit
221 second sensing unit
222 second feedback unit
223 second compensation unit
10A termination voltage regulator
10B termination voltage regulator
110A first switch unit
110B first switch unit
11A terminal is connected with a voltage regulator
11B terminal is connected with a voltage regulator
120A second switch unit
120B second switch unit
130A control unit
130B control unit
210A first boost circuit
210B first boost circuit
21A transient response enhancer
21B transient response enhancer
220A second enhancement circuit
220B second enhancement circuit
CP1Capacitor with a capacitor element
CP2Capacitor with a capacitor element
IREF1Bias current
IREF2Bias current
ITTTerminating current
M1 transistor
M2 transistor
M3 transistor
M4 transistor
M5 transistor
M6 transistor
NC1First control terminal
NC2Second control terminal
NFB1First feedback terminal
NFB2Second feedback terminal
NS1First sensing terminal
NS2Second sensing terminal
NTTTerminated voltage terminal
RP1Resistor with a resistor element
RP2Resistor with a resistor element
VINPInput power supply voltage
VTTTerminating voltage
VTT_REFTerminating a reference voltage
Detailed Description
For the purpose of promoting an understanding of the objects, features and effects of the invention, embodiments and drawings are provided for a detailed description of the present disclosure.
Referring to fig. 1, a schematic diagram illustrates a termination voltage regulator 10 with transient response enhancement according to various embodiments of the present invention. As shown in fig. 1, the termination voltage regulating device 10 includes a termination voltage regulator 11 and a transient response enhancer 21 coupled to the termination voltage regulator 11. The termination voltage adjustment device 10 may be used to connect to a memory device (not shown), such as a double data rate memory for memory bus termination, to provide and draw current through transient response enhancement.
The terminating voltage regulator 11 is used for terminating a voltage terminal NTTIs provided with a termination voltage VTTAnd the termination voltage regulator 11 includes a first switching unit 110 and a second switching unit 120. The first switch unit 110 is coupled to the termination voltage terminal NTTAnd has a first control terminal NC1. The second switch unit 120 is coupled to the termination voltage terminal NTTAnd has a second control terminal NC2. For example, the first switch unit 110 and the second switch unit 120 are coupled to the input power voltage VINPAnd ground (or other supply voltage) and is configured to operate in a switching manner to provide a termination voltage VTTAnd can terminate the voltage terminal N atTTProvide and draw current.A termination current I when the termination voltage regulator 11 supplies a currentTTFrom the terminating voltage terminal NTTOutflow (i.e., I)TT>0) To a connected load (not shown), such as a termination resistor for memory bus termination; when the termination voltage regulator 11 draws current, the termination current ITTTerminating the voltage terminal N from the load current inletTT(i.e., I)TT<0). For example, the first and second switching units 110 and 120 may be configured to respond to a signal at the first control terminal NC1And a second control terminal NC2May be switched by the control unit 130 based on the termination voltage VTTAnd a terminal connected to a reference voltage VTT_REFAnd is produced. Of course, the implementation of the present invention is not limited to the above examples.
The transient response enhancer 21 serves to enhance the transient response of the terminating voltage regulator 11. The transient response modifier 21 includes a first boost circuit 210 and a second boost circuit 220.
The first boost circuit 210 is coupled to at least the termination voltage regulator 11 and is configured to sense a first signal (e.g., voltage or current) associated with the first switching unit 110. In the drawing mode (sinking mode) of the termination voltage adjusting device 10, the second switching unit 120 is operable to switch from the termination voltage terminal NTTWhen drawing current, the first boost circuit 210 makes the first control terminal N in response to the first signalC1At a first voltage.
The second boost circuit 220 is coupled to at least the termination voltage regulator 11 and is configured to sense a second signal (e.g., voltage or current) associated with the second switching unit 120. In the supply mode (sourcing mode) of the termination voltage adjusting device 10, when the first switching unit 110 is operable to supply a current to the termination voltage terminal NTTThe second boost circuit 220 makes the second control terminal N in response to the second signalC2At a second voltage.
In this manner, when the termination voltage regulating device 10 needs to change its operation mode from the drawing mode to the supply mode, the first switching unit 110 can operate faster to supply current,because in the draw mode, the first control terminal N of the first switching unit 110 is connected through the first boost circuit 210C1Is preset to a first voltage. Therefore, during the transition from the draw mode to the supply mode, the termination voltage V of the termination voltage regulator 11 can be effectively reducedTTUndershoots the voltage of (c).
Conversely, when the termination voltage regulating device 10 needs to change its operation mode from the supply mode to the draw mode, the second switching unit 120 is able to draw current faster because the second control terminal N of the second switching unit 120 is changed by the second boost circuit 220 in the supply modeC2Is preset to the second voltage. Therefore, during the transition from the supply mode to the draw mode, the termination voltage V of the termination voltage regulator 11 can be effectively reducedTTVoltage overshoot.
To implement the termination voltage regulating device 10 with transient response enhancement, the first boost circuit 210 or the second boost circuit 220 of the transient response enhancer 21 may be configured to cause the control terminal (e.g., N) of the respective switching unit (e.g., 110, 120) to be switched to the supply mode or from the supply mode to the draw mode, as indicated above, before switching from the draw mode to the supply mode or vice versaC1、NC2) Can be implemented by any suitable circuitry that is preset to a particular voltage in either the supply mode or the draw mode, wherein the termination voltage regulator 11 can be any active termination voltage regulator that includes at least two transistors for providing the termination voltage VTTAnd a switching unit that supplies and draws current.
Various embodiments based on the structure and function of the termination voltage adjustment device 10 are provided below.
Referring to fig. 2, a termination voltage regulation device 10A is shown according to an embodiment of termination voltage regulation device 10 of fig. 1. As shown in fig. 2, the termination voltage regulator 10A includes a termination voltage regulator 11A and a transient response enhancer 21A.
The termination voltage regulator 11A includes a first switching unit 110A and a second switching unit 120A. For example, as shown in fig. 2, a first switch unit 110A and a second switch unit 120A are transistors M1 and M2 (e.g., NMOS and/or PMOS), respectively. In one example, the termination voltage regulator 11A further includes a control unit 130A coupled to the first control terminal NC1And a second control terminal NC2For based on the terminating voltage VTTAnd a terminal connected to a reference voltage VTT_REFThe first and second switching units 110A and 120A are selectively turned on. The control unit 130A, for example, may include comparators 131 and 132, or an error amplifier or other suitable circuit, for providing an output voltage for selectively enabling the first switching unit 110A and the second switching unit 120A. Of course, the implementation of the present invention is not limited to the above examples.
The transient response enhancer 21A serves to enhance the transient response of the termination voltage regulator 11A. Transient response enhancer 21A includes a first enhancing circuit 210A and a second enhancing circuit 220A. Specifically, in one example, the first boost circuit 210A has a first sense terminal NS1And a first feedback terminal NFB1. First sensing terminal NS1Is coupled or connected to a first terminal of the first switching unit 110A, for example, the source terminal of the transistor M1. First feedback terminal NFB1Is coupled or connected to the first control terminal N of the first switch unit 110AC1E.g., the gate terminal of transistor M1.
In an example, the second boost circuit 220A has a second sense terminal NS2And a second feedback terminal NFB2. Second sensing terminal NS2Is coupled or connected to a first terminal of the second switching unit 120A, for example, the source terminal of the transistor M1. Second feedback terminal NFB2Is coupled or connected to the second control terminal N of the second switch unit 120AC2E.g., the gate terminal of transistor M2.
In an embodiment, in the drawing mode, the control unit 130A turns on the second switching unit 120A to terminate the voltage terminal N from the termination voltage terminal NTTDraws current and the first boost circuit 210A causes the first control terminal NC1Through the first feedback terminal NFB1But at a first voltage.
In one embodiment, in the providing mode, the control unit 130A is turned onA first switch unit 110A for supplying power to the termination voltage terminal NTTAnd the second boost circuit 220A enables the second control terminal NC2Through the second feedback terminal NFB2At a second voltage.
Referring to fig. 3 and 4, embodiments of a first boost circuit 210A and a second boost circuit 220A are shown, respectively.
In the embodiment shown in fig. 3, the first boost circuit 210A includes a first sensing unit 211, a first feedback unit 212 and a first compensation unit 213.
The first sensing unit 211 is used for sensing a first signal, which is indicative of a current of the first switching unit 110, for example, a source current of the transistor M1. The first sensing unit 211 is, for example, a switching unit including a transistor M3 (e.g., an NMOS or PMOS or other transistor). The first sensing unit 211 has: a sense control terminal, such as the gate terminal of transistor M3, is coupled to the first feedback terminal NFB1(ii) a A first terminal, such as the source terminal of transistor M3, is coupled to the first sense terminal NS1(ii) a And a second terminal, e.g., the drain terminal of transistor M3, for receiving a first bias signal, e.g., a bias current I from a current sourceREF1。
Further, in some examples, the first sensing unit 211 may be implemented according to the following relation: MS (Mass Spectrometry)1＝Nb1*MS3And I1≤Nb1*IREF1Wherein MS is1One size, MS, of the transistor M1 is shown3Represents a size, Nb, of the transistor M31Is a value according to the design or requirements for the current magnitude of transistor M1. Of course, implementations of the present invention are not limited to these examples.
A first feedback unit 212 coupled to the first feedback terminal NFB1And a second terminal of the first sensing unit 211, and for feeding back a signal to the first control terminal NC1. For example, the first feedback unit 212 includes a transistor M5 (e.g., an NMOS or PMOS or other transistor).
A first compensation unit 213 coupled to the first feedback terminal NFB1And a second terminal of the first sensing unit 211For circuit stabilization. For example, the first compensation unit 213 includes a capacitor CP1And a resistance RP1。
In the embodiment shown in fig. 4, the second boost circuit 220A includes a second sensing unit 221, a second feedback unit 222 and a second compensation unit 223.
The second sensing unit 221 is used for sensing a second signal, which is indicative of a current of the second switching unit 120, for example, a source current of the transistor M2. The second sensing unit 221 is, for example, a switching unit including a transistor M4 (e.g., an NMOS or PMOS or other transistor). The second sensing unit 221 has: a sense control terminal, such as the gate terminal of transistor M4, is coupled to the second feedback terminal NFB2(ii) a A first terminal, such as the source terminal of transistor M4, is coupled to the second sensing terminal NS2(ii) a And a second terminal, e.g., the drain terminal of transistor M4, for receiving a second bias signal, e.g., bias current I from a current sourceREF2。
Additionally, in some examples, the second sensing unit 221 may be implemented according to the following relationship: MS (Mass Spectrometry)2＝Nb2*MS4And I2≤Nb2*IREF2Wherein MS is2One size, MS, of the transistor M2 is shown4Represents a size, Nb, of the transistor M42Is a value according to the design or requirements for the current magnitude of transistor M1.
A second feedback unit 222 coupled to the second feedback terminal NFB2And a second terminal of the second sensing unit 221 for feeding back a signal to the second control terminal NC2. For example, the second feedback unit 222 includes a transistor M6 (e.g., an NMOS or PMOS or other transistor).
A second compensation unit 223 coupled to the second feedback terminal NFB2And a second terminal of the second sensing unit 221 for circuit stabilization. For example, the second compensation unit 223 includes a capacitor CP2And a resistance RP2。
In the following, the circuit operation of the first enhancement circuit 210A and the second enhancement circuit 220A is described. For the sake of brevity, the providing mode is first described. Of course, implementations of the present invention are not limited to these examples.
Referring to FIGS. 2 and 4, in one embodiment, in the providing mode (i.e., I)TT>0) Control unit 130A, based on the termination voltage VTTAnd terminating reference voltage VTT_REFAnd, it is determined to turn on the first switching unit 110A to supply the current to the termination voltage terminal NTT. Meanwhile, as shown below, the second boost circuit 220A causes the second control terminal N to be turned onC2Through the second feedback terminal NFB2At a second voltage. First, referring to FIG. 4, since the source of the transistor M2 is connected to ground, the second control terminal NC2With a low voltage of about zero. Then, since the transistor M6 is turned on and a loop is formed inside the second boost circuit 220A, it is connected to the second control terminal NC2Is increased by the second feedback unit 222. Since the second compensating unit 223 is composed of VG2Representative second control terminal NC2Will increase to the second voltage in a stable manner (e.g., a value greater than zero, such as 0.6V or other value). For example, the second voltage may be implemented to satisfy the following relation VGS2-Vt＝VG2-VtNot less than 0 such that VG2≥VtAnd I1＝ITT+I2In which V isGS2Represents the voltage between the gate terminal and the source terminal of the transistor M2, and VtRepresenting the threshold voltage of the corresponding transistor. Thus, in the providing mode (i.e., I)TT>0) From VG2Represented at the second control terminal NC2Will increase to a second voltage.
As such, when the termination voltage adjusting device 10A needs to change its operation mode from the supply mode to the draw mode, since the second control terminal N of the second switching unit 120 is changed by the second boost circuit 220AC2Preset to the second voltage, the second switching unit 120A can operate faster to draw current. Therefore, during the transition from the supply mode to the draw mode, the termination voltage V of the termination voltage regulator 11A can be effectively reducedTTVoltage overshoot.
Referring to FIGS. 2 and 3, inIn an embodiment, in the draw mode (i.e., I)TT<0) The control unit 130A is based on the termination voltage VTTAnd terminating reference voltage VTT_REFAnd, the second switching unit 120A is surely turned on to terminate the voltage terminal N from the terminalTTDrawing a current. Meanwhile, as described below, the first boost circuit 210A passes through the first feedback terminal NFB1Make the first control terminal NC1At a first voltage. First, referring to fig. 3, a first control terminal NC1With a low voltage of about zero. Then, since the transistor M5 is turned on and a loop is formed inside the first boost circuit 210A, it is at the first control terminal NC1Is increased by the first feedback unit 212. Since the first compensation unit 213 is composed of VG1Representative first control terminal NC1Will increase to the first voltage in a stable manner (e.g., a value greater than zero, such as 1V, 1.1V, 1.2V, 1.3V, 1.8V, or other values). For example, the first voltage may be implemented to satisfy the following relation VGS1-Vt＝VG1-VTT-VtNot less than 0 such that VG1≥VTT+VtAnd I2＝ITT+I1In which V isGS1Representing the voltage between the gate terminal and the source terminal of transistor M1. Thus, in the draw mode (i.e., I)TT<0) First control terminal NC1Will increase to the first voltage.
As such, when the termination voltage regulating device 10A needs to change its operation mode from the drawing mode to the providing mode, because in the drawing mode, the first control terminal N of the first switch unit 110A has been changed by the first boost circuit 210AC1Preset to the first voltage, the first switching unit 110A can operate more quickly to supply current. Therefore, during the transition from the drawing mode to the supply mode, the termination voltage V of the termination voltage regulator 11A can be effectively reducedTTUndershoots the voltage of (c).
In the embodiments described above in connection with fig. 2 to 4, the termination voltage adjusting device 10A is exemplified according to the configuration shown in fig. 2. However, the implementation of the present invention is not limited to the above examples.
Referring to fig. 5, a termination voltage regulation device 10B is shown according to another embodiment of the termination voltage regulation device 10 of fig. 1. As shown in fig. 5, the termination voltage regulator 10B includes a termination voltage regulator 11B and a transient response enhancer 21B. For example, termination voltage regulator 11B is implemented based on termination voltage regulator 11A shown in fig. 2, and transient response enhancer 21B may be implemented based on transient response enhancer 21A as shown in fig. 2.
As in the embodiment shown in fig. 5, termination voltage adjustment device 10B differs from termination voltage adjustment device 10A in that transient response enhancer 21B indirectly enables the corresponding switching unit (e.g., N) through control unit 130BC1、NC2) Is set to a particular voltage in either the supply mode or the drain mode (e.g., 110B, 120B).
In one example, the first feedback terminal NFB1 A control unit 130B connected to the termination voltage regulator 11B; and in the drawing mode, when the control unit 130B turns on the second switching unit 120B to terminate the voltage terminal N from the terminalTTWhile drawing current, the first boost circuit 210B of the transient response booster 21B passes through the first feedback terminal NFB1The control unit 130B is enabled to provide a first voltage to enable the first control terminal NC1At a first voltage.
In one example, the second feedback terminal NFB2Is connected to the control unit 130B; in the supply mode, the control unit 130B turns on the first switching unit 110B to supply a current to the termination voltage terminal NTTAnd the second boost circuit 220B is connected to the second feedback terminal NFB2Make the control unit 130B provide the second current to make the second control terminal NC2At a second voltage.
For example, the transient response enhancer 21B may be implemented by the first feedback terminal NFB1Or the second feedback terminal NFB2The feedback signal is sent to a control unit 130B configured to receive the feedback signal. In response to the received feedback signal, the control unit 130B pre-asserts the control terminal (e.g., N) of the respective switch unit (e.g., 110B or 120B) before switching the mode from the supply mode to the drain mode or vice versaC1Or NC2)Configured to a particular voltage in the supply mode or the draw mode, the above example may be implemented similarly to or based on any of the foregoing examples of termination voltage adjustment devices (e.g., 10 or 10A) or modified where appropriate. For example, the control unit 130B has an output circuit stage including comparators 131 and 132 (or differential amplifiers or other suitable circuits) configured to be responsive to the feedback signal. For the sake of brevity, the operation of terminating voltage regulating device 10B may be similarly derived and therefore will not be repeated.
In further embodiments, the termination voltage adjustment device (e.g., 10A, or 10B) may be configured to provide a termination voltage of 0.6V, 0.75V, 0.9V, or 1.25V to meet the requirements of a Double Data Rate (DDR) memory standard (e.g., DDR1, DDR2, DDR3, DDR4, or others). Of course, the implementation of the present invention is not limited to the above examples.
Although the present invention has been described in terms of specific embodiments, numerous modifications, combinations, and variations could be made thereto by those of ordinary skill in the art without departing from the scope and spirit of the invention as set forth in the claims.
It should be noted that the above-mentioned embodiments are merely illustrative for convenience of description, and the invention is not limited thereto, and those skilled in the art will appreciate that various modifications and changes can be made without departing from the spirit of the invention.
Claims (11)
1. A termination voltage adjustment device having transient response enhancement, the termination voltage adjustment device comprising:
a termination voltage regulator for providing a termination voltage on a termination voltage terminal, the termination voltage regulator comprising a first switching unit and a second switching unit coupled to the termination voltage terminal; and
a transient response enhancer coupled to the termination voltage regulator for enhancing a transient response of the termination voltage regulator, the transient response enhancer comprising;
a first boost circuit coupled to at least the first switch unit for sensing a first signal associated with the first switch unit, wherein in a draw mode, the first boost circuit causes a first control terminal of the first switch unit to be at a first voltage in response to the first signal when the second switch unit is operable to draw current from the termination voltage terminal; and
a second boost circuit coupled to at least the second switch unit for sensing a second signal associated with the second switch unit, wherein in a supply mode, the second boost circuit causes a second control terminal of the second switch unit to be at a second voltage in response to the second signal when the first switch unit is operable to supply current to the termination voltage terminal.
2. The termination voltage adjustment device of claim 1, wherein the first boost circuit has a first sense terminal coupled to the first terminal of the first switch unit and has a first feedback terminal coupled to the first control terminal of the first switch unit.
3. The termination voltage adjustment device of claim 2, wherein the termination voltage regulator further comprises: a control unit coupled to the first control terminal and the second control terminal for selectively turning on the first switching unit and the second switching unit based on the termination voltage and a termination reference voltage.
4. A termination voltage regulation device according to claim 3, characterized in that the first feedback terminal is connected to a first control terminal of the first switching unit; in the draw mode, the control unit turns on the second switch unit to draw current from the termination voltage terminal, and the first boost circuit causes the first control terminal to be at the first voltage through the first feedback terminal.
5. A termination voltage regulation device according to claim 3, characterized in that the first feedback terminal is connected to the control unit; in the draw mode, the control unit turns on the second switching unit to draw current from the termination voltage terminal, and the first boost circuit causes the control unit to provide the first voltage through the first feedback terminal to bring the first control terminal to the first voltage.
6. The termination voltage adjustment device of claim 2, wherein the first boost circuit comprises:
a first sensing unit having a sensing control terminal coupled to the first feedback terminal, a first terminal coupled to the first sensing terminal, and a second terminal for receiving a first bias signal, wherein the first sensing unit is for sensing the first signal, which is representative of a current of the first switching unit;
a first feedback unit coupled to the first feedback terminal and the second terminal of the first sensing unit for feeding back a signal to the first control terminal; and
a first compensation unit coupled to the first feedback terminal and the second terminal of the first sensing unit for stabilizing a circuit.
7. The termination voltage adjustment device of claim 1, wherein the second boost circuit has a second sense terminal coupled to the first terminal of the second switching unit, and a second feedback terminal coupled to the second control terminal of the second switching unit.
8. The termination voltage adjustment device of claim 7, further comprising a control unit coupled to the first control terminal and the second control terminal for selectively turning on the first switching unit and the second switching unit based on the termination voltage and a termination reference voltage.
9. The termination voltage adjustment device of claim 8, wherein the second feedback terminal is connected to a second control terminal of the second switching unit; in the supply mode, the control unit turns on the first switching unit to supply a current to the termination voltage terminal, and the second boost circuit makes the second control terminal at the second voltage through the second feedback terminal.
10. The termination voltage adjustment device of claim 8, wherein the second feedback terminal is connected to the control unit; in the supply mode, the control unit turns on the first switching unit to supply a current to the termination voltage terminal, and the second boost circuit causes the control unit to supply the second voltage through the second feedback terminal to bring the second control terminal to the second voltage.
11. The termination voltage adjustment device of claim 7, wherein the second boost circuit comprises:
a second sensing unit having a sensing control terminal coupled to the second feedback terminal, a first terminal coupled to the second sensing terminal, and a second terminal for receiving a second bias signal, wherein the second sensing unit is for sensing the second signal, which is representative of a current of the second switching unit;
a second feedback unit coupled to the second feedback terminal and the second terminal of the second sensing unit, for feeding back a signal to the second control terminal; and
a second compensation unit coupled to the second feedback terminal and the second terminal of the second sensing unit for stabilizing a circuit.
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| CN202010435390.0A CN113707194A (en) | 2020-05-21 | 2020-05-21 | Termination voltage regulation device with transient response enhancement |
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| CN202010435390.0A CN113707194A (en) | 2020-05-21 | 2020-05-21 | Termination voltage regulation device with transient response enhancement |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101192070A (en) * | 2006-11-24 | 2008-06-04 | 北京中电华大电子设计有限责任公司 | Power-on protection method and circuit for voltage regulator |
| CN101893908A (en) * | 2010-07-08 | 2010-11-24 | 西安启芯微电子有限公司 | Filling in/pulling out current rapid response linear voltage regulator and regulating method |
| CN102570889A (en) * | 2011-01-04 | 2012-07-11 | 西华大学 | Three-phase four-leg inverter and control method thereof |
| US20130154592A1 (en) * | 2011-12-19 | 2013-06-20 | O2Micro Inc. | Circuit and method for providing a reference signal |
| CN103760943A (en) * | 2014-01-13 | 2014-04-30 | 合肥工业大学 | Slew rate enhancement circuit applicable to LDO regulators (low dropout regulators) |
| CN104199504A (en) * | 2014-09-28 | 2014-12-10 | 苏州晶为微电子有限公司 | Fast transient response low-dropout linear regulator |
| KR20150077340A (en) * | 2013-12-27 | 2015-07-07 | 세이코 인스트루 가부시키가이샤 | Voltage regulator and electronic apparatus |
| TWI671983B (en) * | 2018-08-08 | 2019-09-11 | 華邦電子股份有限公司 | Voltage regulator and dynamic bleeder current circuit |
-
2020
- 2020-05-21 CN CN202010435390.0A patent/CN113707194A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101192070A (en) * | 2006-11-24 | 2008-06-04 | 北京中电华大电子设计有限责任公司 | Power-on protection method and circuit for voltage regulator |
| CN101893908A (en) * | 2010-07-08 | 2010-11-24 | 西安启芯微电子有限公司 | Filling in/pulling out current rapid response linear voltage regulator and regulating method |
| CN102570889A (en) * | 2011-01-04 | 2012-07-11 | 西华大学 | Three-phase four-leg inverter and control method thereof |
| US20130154592A1 (en) * | 2011-12-19 | 2013-06-20 | O2Micro Inc. | Circuit and method for providing a reference signal |
| KR20150077340A (en) * | 2013-12-27 | 2015-07-07 | 세이코 인스트루 가부시키가이샤 | Voltage regulator and electronic apparatus |
| CN103760943A (en) * | 2014-01-13 | 2014-04-30 | 合肥工业大学 | Slew rate enhancement circuit applicable to LDO regulators (low dropout regulators) |
| CN104199504A (en) * | 2014-09-28 | 2014-12-10 | 苏州晶为微电子有限公司 | Fast transient response low-dropout linear regulator |
| TWI671983B (en) * | 2018-08-08 | 2019-09-11 | 華邦電子股份有限公司 | Voltage regulator and dynamic bleeder current circuit |
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