CN117792399B - Current rudder converter - Google Patents
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Abstract
The application relates to the technical field of integrated circuits, and provides a current steering converter which is controlled by N-bit binary codes, wherein the current steering converter comprises: a first current source group and a second current source group, the first current source group comprising: the unit current source and 10a+1 current source, 1 is less than or equal to a is less than or equal to N-1, a is a positive integer, the current value of the unit current source is I ref, the current value of the 10a+1 current source is 2 a‑1Iref, and the first current source group comprises: the 10a+2 current source, the 10a+2 current source has a current value of 2 a‑1Iref, and the unit current source, the 10a+1 current source and the 10a+2 current source are connected with the output end of the current steering converter through independent switches. The switch is controlled by switch information on a binary node tree, the binary node tree comprises a plurality of distribution paths, each distribution path comprises N nodes, and when the node is jumped from the binary node tree, only one of the switches corresponding to the unit current source, the 10a+1 current source and the 10a+2 current source is turned on or off.
Description
Technical Field
The application relates to the technical field of integrated circuits, in particular to a current rudder converter.
Background
Currently, in integrated circuit designs, digital signals are converted to analog signals by a converter (Digital to Analog Converter, DAC). DACs are an indispensable bridge connecting digital and analog circuits and have many applications in the display field and the signal transmission field. For a current steering converter controlled by a binary code, each bit of code value of the binary code controls a switch of an independent current source, when the code value is 1, the corresponding switch is closed, and when the code value is 0, the corresponding switch is opened. The response of the current steering converter is equal to the algebraic sum of the responses of the individual current sources on the individual branches, so that the jitter of the signal output by the current steering converter can be very large when more than two code values in the binary code are flipped. Thus, in the case where the load is a motor, chatter of the motor is caused; in the case of a load being a comparator, this results in a short pulse that should not occur in the comparator; there are also many cases where there are deviations or even erroneous results due to strong signal jitter.
Disclosure of Invention
The application provides a current steering converter, which is used for reducing jitter of an output signal of the current steering converter so as to improve the reliability of the current steering converter.
In a first aspect, an embodiment of the present application provides a current steering converter, which is controlled by an N-bit binary code, the current steering converter including: a first current source group and a second current source group, the first current source group comprising: a unit current source and a 10a+1 current source, wherein a is more than or equal to 1 and less than or equal to N-1, a is a positive integer, and the current value of the unit current source isThe current value of the 10a+1 current source is/>The second current source group includes: 10a+2 current source, the 10a+2 current source has a current value of/>The unit current source, the 10a+1 current source and the 10a+2 current source are connected with the output end of the current rudder converter through independent switches;
All the switches are turned on or off according to switch information on a binary node tree, the binary node tree comprises a plurality of distribution paths, each distribution path comprises N nodes, the nodes of each distribution path are respectively distributed from the 1 st level to the N th level, the nodes distributed on the 1 st level are root nodes of the binary node tree, each node corresponds to one piece of switch information, the switch information is generated according to N binary codes, when all the switches execute the switch information of the root nodes, all the switches corresponding to the unit current sources and the 10a+1 current sources are turned on, all the switches corresponding to the 10a+2 current sources are turned off, and when all the switches jump from executing the switch information corresponding to the a node on the distribution path to executing the switch information corresponding to the a+1 node, the current value in the second current source group is turned on Or, closing the current value in the first current source group to be/>A switch corresponding to the current source of (a).
The current rudder converter provided by the embodiment of the application is provided with a first current source group and a second current source group, wherein the first current source group comprises a unit current source and a 10a+1 current source, the second current source group comprises a 10a+2 current source, a is not less than 1 and not more than N-1, a is a positive integer, N is the bit number of a binary code, and current values corresponding to the 10a+1 current source and the 10a+2 current source are. All switches are turned on or turned off according to the switch information on the binary node tree, the binary node tree comprises a plurality of distribution paths, each distribution path comprises N nodes, and the nodes of each distribution path are respectively distributed in the 1 st stage to the N th stage. All switches jump from the switch information corresponding to the node of the a-th stage on the execution distribution path to the switch information corresponding to the node of the a+1-th stage, and the current value in the second current source group is started to be/>Or, turning off the current value in the first current source group to be/>A switch corresponding to the current source of (a). Therefore, when the current rudder converter outputs the target electric signal according to the changed binary code, the current rudder converter changes the current electric signal into the target electric signal by sequentially opening or closing the corresponding switches of the related current sources, and only one switch can be opened or closed at a time, so that the strong jitter of the output electric signal in the changing process is avoided, and the reliability of the current rudder converter is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic circuit diagram of a current steering converter according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a first binary node tree according to an embodiment of the present application;
fig. 3 is a schematic diagram illustrating a change of an output electrical signal of a first conventional current steering converter according to an embodiment of the present application;
fig. 4 is a schematic diagram illustrating a variation of an output electrical signal of the first current steering converter 100 according to an embodiment of the present application;
FIG. 5 is a schematic diagram of a second binary node tree according to an embodiment of the present application;
Fig. 6 is a schematic diagram illustrating a change in an output electrical signal of a second conventional current steering converter according to an embodiment of the present application;
fig. 7 is a schematic diagram illustrating a variation of an output electrical signal of the second current steering converter 100 according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The flow diagrams depicted in the figures are merely illustrative and not necessarily all of the elements and operations/steps are included or performed in the order described. For example, some operations/steps may be further divided, combined, or partially combined, so that the order of actual execution may be changed according to actual situations.
It is also to be understood that the terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this specification and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be further understood that the term "and/or" as used in the present specification and the appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.
The current steering converter provided by the embodiment of the application is controlled by an N-bit binary code, and comprises: a first current source group and a second current source group. The first current source group includes: a unit current source and a 10a+1 current source, wherein a is more than or equal to 1 and less than or equal to N-1, and a is a positive integer. The current value of the unit current source isThe current value of the 10a+1 current source is/>. The second current source group includes: 10a+2 current source, 10a+2 current source has a current value of. The unit current source, the 10a+1 current source and the 10a+2 current source are connected with the output end of the current rudder converter through independent switches.
Wherein all switches are turned on or off according to the switch information on the binary node tree. The binary node tree comprises a plurality of distribution paths, each distribution path comprises N nodes, the nodes of each distribution path are respectively distributed in the 1 st level to the N th level, and the nodes distributed in the 1 st level are root nodes of the binary node tree. Each node corresponds to a piece of switching information which is generated according to N bits of binary codes. When executing the switch information of the root node, all the switches corresponding to the unit current source and the 10a+1 current source are turned on, and all the switches corresponding to the 10a+2 current source are turned off. All switches jump from the switch information corresponding to the node of the a-th stage on the execution distribution path to the switch information corresponding to the node of the a+1-th stage, and the current value in the second current source group is started to beOr, turning off the current value in the first current source group to be/>A switch corresponding to the current source of (a).
In an exemplary conventional current steering converter, only one group of current sources with current values increased by double is arranged, and the current steering converter provided by the embodiment of the application further comprises: a first current source group and a second current source group. The first current source group includes: the second current source group comprises 10a+2 current sources, wherein the 10a+1 current sources and 10a+2 current sources have the same quantity. The number of current sources included in the 10a+1 th current source and the 10a+2 th current source is set according to the binary code of N bits.
In some embodiments, a 3-bit binary code, the 10a+1 current source includes: the 11 th and 21 st current sources, 10a+2 th current sources include: 12 th current source and 22 nd current source. The 11 th current source has a current value ofThe current value of the 21 st current source is/>The current value of the 12 th current source is/>The current value of the 22 nd current source is/>。
Illustratively, the binary code includes a code value of N bits, for example, a 4-bit binary code of "1100", and the current steering converter reads the code value of the binary code from a low bit to a high bit and controls the corresponding current source to be turned on or off to output a target electrical signal corresponding to the code value of the binary code.
In a conventional current converter, the code value of each binary code controls one current source, for example, "1" controls the switching on of the corresponding current source and "0" controls the switching on of the corresponding current source. In the current converter provided by the embodiment of the application, the current corresponding to the control code (the binary code of N bits) is output through the unit current source and the two groups of current sources with the current values multiplied and increased, so that the current converter cannot be controlled according to the control mode of the conventional current source and needs to be controlled according to the switch information on the binary node tree constructed in advance.
In the embodiment of the application, a binary node tree is constructed according to all code values of preset binary codes. The code value of each binary code corresponds to a node on the binary node tree, and the code value of each binary code is converted into a piece of switch information.
The code value of the binary code corresponding to the root node is the median of all non-zero code values of the binary code, for example, 4-bit binary codes, from "0001" to "1111", and the median of the non-zero code value is "1000", and then the code value corresponding to the root node of the binary node tree is "1000".
The binary node tree comprises a plurality of distribution paths, the starting point of each distribution path is the root node of the binary node tree, the root nodes are distributed at the 1 st level, and the 1 st level node only has the root node. In addition to the root node, each distribution path also comprises N-1 nodes, which are respectively distributed in the 2 nd level to the N th level. The nodes on one distribution path are partially identical to the nodes of other distribution paths, for example, the starting points are all root nodes, and the partial nodes are not identical, for example, the nodes of the 1 st level to the 3 rd level are identical, and the nodes of the 4 th level are not identical.
In building a binary node tree, a splitting method is used to build, where one node of the upper level is split into two nodes at the lower level, for example, the 1 st level includes 1 root node, and the second level includes 2 nodes. The code value corresponding to one node of the a-th level and the code values of two nodes of the a+1-th level have the following splitting strategies: decimal number addition operation item corresponding to code value corresponding to one node of the previous stageA decimal number corresponding to the code value of one node of the next stage; decimal number subtracting operation item/>, corresponding to code value corresponding to one node of the previous stageEqual to the decimal number corresponding to the code value of another node of the next stage. For example, n=4, a=1, the code value of the root node of the 1 st level is "1000", the corresponding decimal number is 8, and the operation term isThe code values of the nodes of the 2 nd level are '1100' and '0100', and the corresponding decimal numbers are 12 and 4 respectively. According to the splitting strategy, the splitting is carried out downwards step by step, the splitting is stopped at the Nth stage, and the splitting paths are recorded during the splitting, so as to construct the distribution paths. After splitting is completed, the nodes of the binary node tree comprise all code values corresponding to the N-bit binary codes.
It should be noted that when all code values of the binary code are 0, for example, "0000", all switches of the current steering converter are in the off state.
When the binary node tree constructed by the splitting strategy jumps from one node to the next node, the conversion of the code value is converted into an operation item, and the conversion of the code value can be expressed on the current rudder converter only by opening or closing the switch of a corresponding current source each time according to the current value corresponding to the operation item. Specifically, when all the switches jump from executing the switch information corresponding to the node of the a-th stage on the distribution path to executing the switch information corresponding to the node of the a+1th stage, the current value in the second current source group is turned on to beOr, closing the current value in the first current source group to be/>A switch corresponding to the current source of (a).
Therefore, when the current rudder converter outputs the target electric signal according to the changed binary code, the current rudder converter changes the current electric signal into the target electric signal by sequentially opening or closing the corresponding switches of the related current sources, and only one switch can be opened or closed at a time, so that the strong jitter of the output electric signal in the changing process is avoided, and the reliability of the current rudder converter is improved.
In order to more clearly describe the technical scheme of the present application, the technical scheme of the present application will be described through a specific embodiment, and it should be noted that the specific embodiment is used for expanding the technical scheme of the present application, and is not limited to the present application.
In some embodiments, as shown in fig. 1, an embodiment of the present application provides a circuit schematic of a current steering converter. As shown in fig. 1, the current steering converter 100 includes a first current source group 11, a second current source group 12, and an output resistor R. The first current source group 11 includes: unit current source11 Th Current Source/>21 St current source/>And 31 st current source/>. The second current source group 12 includes: 12 th Current Source/>22 Nd Current Source/>And 32 nd Current Source/>. Unit current source/>11 Th Current Source/>21 St current source/>And 31 st current source/>12 Th Current Source/>22 Nd Current Source/>And 32 nd Current Source/>The first ends of the switches are respectively connected with the first ends of the corresponding switches, the second ends of the switches are respectively connected with the first ends of the output resistors R, the first ends of the output resistors R are the output ends of the current steering converter 100, and the second ends of the output resistors R are grounded.
11 Th current sourceThe corresponding current value is/>21 St current source/>The corresponding current value is/>31 St Current Source/>The corresponding current value is/>; 12 Th Current Source/>The corresponding current value is/>22 Nd Current Source/>The corresponding current value is/>32 Th Current Source/>The corresponding current value is/>。
The current steering converter 100 as shown in fig. 1 is controlled by a 4-bit binary code, i.e., n=4.
Referring to fig. 2, fig. 2 shows a schematic diagram of a binary node tree according to an embodiment of the present application. The binary node tree as shown in fig. 2 is used to control the current steering converter 100 as shown in fig. 1. As shown in fig. 2, all nodes of the binary node tree are distributed at the 1 st to 4 th levels, respectively. The nodes on the binary node tree respectively correspond to one code value of the binary code, wherein the code value corresponding to the root node is '1000'. The name of the current source included in the switch information of each node is abbreviated, that is, the corresponding switch of the current source is turned on, and the switches of other current sources are turned off, for example, the name of the current source of the root node is abbreviated as follows: "”、“/>”、“/>"And"/>", Then the current steering converter 100 needs to turn on the unit current source/>, when executing the switching information corresponding to the root node11 Th Current Source/>21 St current source/>And 31 st current source/>The corresponding switches are all turned off.
Each distribution path comprises 4 nodes, the nodes of each distribution path are respectively distributed in the 1 st level to the 4 th level, and when all switches execute the switch information of the root node, the unit current source11 Th Current Source/>21 St current source/>And 31 st current source/>The corresponding switches are all turned on, and the 12 th current source/>22 Nd Current Source/>And 32 nd Current Source/>The corresponding switches are all closed.
If a=2, all switches switch from executing the switch information corresponding to the node of the 2 nd level on the distribution path to the switch information corresponding to the node of the 3 rd level, and start the 22 nd current sourceCorresponding switch, or turn off 21 st current sourceAnd a corresponding switch.
In some embodiments, all switches switch from executing switch information corresponding to the node of the N-1 level on the distribution path to switch off the unit current source when executing switch information corresponding to the node of the N-level informationOr, turn on the current value in the second current source group to be/>A switch corresponding to the current source of (a).
Illustratively, on the binary node tree as shown in fig. 2, in the lower right corner, the mid-code value of level 3 is "0010" and the code values of the corresponding two nodes in level 4 are "0011" and "0001", respectively. When the current steering converter 100 executes the switching information of the node corresponding to "0010", the 11 th current source is turned onAnd unit current source/>When the corresponding switch jumps to the switch information of the node corresponding to the execution '0011', the 11 th current source/>, is startedUnit current source/>And a 12 th current sourceA corresponding switch; when the switch information of the node corresponding to the execution 0001 is jumped, only the 11 th current source/>, is startedAnd a corresponding switch.
In some embodiments, when all switches jump from executing the switch information corresponding to the node of the a+1st stage on the distribution path to executing the switch information corresponding to the node of the a-th stage, the current value in the second current source group is turned off to beOr, turning on the current value in the first current source group to be/>A switch corresponding to the current source of (a).
By setting the corresponding relation between the switch information and the nodes, when one node jumps to the other node, the current rudder converter can only switch on or switch off the corresponding switch of one current source, so that the output current value is ensured not to change greatly.
In some embodiments, the current steering converter further comprises a controller for controlling the switching of the first current source group and the switching of the second current source group, the controller further for performing: acquiring an N-bit binary code; when the first code value is detected to be changed into the second code value, determining a first target node corresponding to the first code value on the binary node tree, and determining a second target node corresponding to the second code value on the binary node tree; wherein the first code value is N-bit binary code before modification, and the second code value is N-bit binary code after modification; determining a jump path on the binary node tree according to the first target node, the second target node and the distribution path, wherein the jump path is formed by partial paths or all paths in one or more distribution paths; and controlling all the switches to be opened or closed according to the switch information corresponding to the nodes on the jump path.
For example, as shown in fig. 2, if the first code value before the change is "0001", the second code value after the change is "1111", the controller determines the node corresponding to "0001" as the first target node, and the node corresponding to "1111" as the second target node, and searches for a jump path from the first target node to the second target node along the distribution path. After determining the jump path, the controller jumps successively according to the nodes on the jump path until reaching the second target node.
By the method, the current steering converter orderly turns on or off the switch of the current source according to the nodes on the jump path, so that the output electric signal changes in a gradient manner, the output electric signal does not shake severely, and the reliability of the current steering converter is improved.
In some embodiments, the controller, when configured to perform determining a jump path on the binary node tree according to the first target node, the second target node and the distribution path, is specifically configured to perform: determining a return path according to the first target node, the root node and the distribution path; the starting point of the return path is a first target node, and the end point of the return path is a root node; determining an adjustment path according to the second target node, the root node and the distribution path; the starting point of the adjustment path is a root node, and the end point of the adjustment path is a first target node; and synthesizing a jump path according to the return path and the adjustment path.
Illustratively, as shown in FIG. 2, starting at the first target node "0001", after passing through node "0010" and node "0100", the root node "1000" is reached. The first target node "0001", node "0010", node "0100", root node "1000" and the path between them constitute the return path. Starting from the root node "1000", after passing through the nodes "1100" and "1110", the second target node "1111", the root node "1000", the node "1100", the node "1110", the second target node "1111" and the paths therebetween constitute an adjustment path. The dynamic steps of the switch per jump when the controller controls the switch of the current steering converter 100 as shown in fig. 1 according to the switch information on the adjustment path include: S201-S206.
S201, switching on the unit current source。
S202, switching on the 21 st current source。
S203, switch on the 31 st current source。
S204, switching on the 32 nd current source。
S205, turning on the 22 nd current source。
S206, switching on the 12 th current source。
Referring to fig. 3 and 4, fig. 3 is a schematic diagram showing the variation of the output electrical signal of the first conventional current steering converter, and fig. 4 is a schematic diagram showing the variation of the output electrical signal of the first current steering converter 100. The output electrical signals (output voltages) in fig. 3 and 4 are each output electrical signals generated by the corresponding current steering converter executing a change from the code value "0001" to "1111" of the binary code. As shown in FIG. 3, the output voltage of the conventional current steering converter has a large amplitude of voltage jump in the process of variation, while as shown in FIG. 4, the output voltage of the current steering converter provided by the embodiment of the application is stepped, and the strategy controls the maximum fluctuation of the output voltage to be within the range ofAnd the reliability is higher due to smaller jitter.
By the method, the root node is used as the end point of the return path, and the adjustment path is searched from the root node, so that the method is simple and easy to realize, the calculation pressure of the controller can be reduced, and when the number of current rudder converters is large, the calculation force of the controller is saved considerably.
In some embodiments, the controller, when configured to perform determining a jump path on the binary node tree according to the first target node, the second target node and the distribution path, is specifically configured to perform: determining a shortest path from the first target node to the second target node on the binary node tree according to the first target node, the second target node and the distribution path; the shortest path is determined as the jump path.
Referring to fig. 5, fig. 5 shows a schematic diagram of a second binary node tree according to an embodiment of the present application. As shown in fig. 5, the first code value before the change is "0001", the second code value after the change is "0111", and the controller determines the node corresponding to "0001" as the first target node and the node corresponding to "0111" as the second target node. Through a preset shortest path searching algorithm, from a first target node '0001', through a node '0010', a node '0100' and a node '0110', namely reaching a second target node '0111', only 4 hops are needed to be executed, and the dynamic steps of a switch in each hop include: S301-S304.
S301, switching on unit current source。
S302, switching on the 21 st current source。
S303, switching on the 22 nd current source。
S304, switching on the 12 th current source。
And the root node "1000" is returned first and then the second target node "0111" is adjusted, then 6 hops need to be executed.
Referring to fig. 6 and 7, fig. 6 is a schematic diagram showing the variation of the output electrical signal of the second conventional current steering converter, and fig. 7 is a schematic diagram showing the variation of the output electrical signal of the second current steering converter 100. In fig. 6 and 7, the output electric signals (output voltages) are each output electric signals generated by the corresponding current steering converter executing a change from the code value "0001" of the binary code to "0111". As shown in FIG. 6, the output voltage of the conventional current steering converter has a large amplitude of voltage jump in the process of variation, while as shown in FIG. 7, the output voltage of the current steering converter provided by the embodiment of the application is stepped, and the strategy controls the maximum fluctuation of the output voltage to be within the range ofAnd the reliability is higher due to smaller jitter.
The shortest path is used for executing the jump, the number of times of the jump to be executed is minimum, and the efficiency of signal conversion is higher, so that the sensitivity of the current steering converter can be improved.
While the application has been described with reference to certain preferred embodiments, it will be understood by those skilled in the art that various changes and substitutions of equivalents may be made and equivalents will be apparent to those skilled in the art without departing from the scope of the application. Therefore, the protection scope of the application is subject to the protection scope of the claims.
Claims (8)
1. A current steering converter, wherein the current steering converter is controlled by an N-bit binary code, the current steering converter comprising: a first current source group and a second current source group, the first current source group comprising: a unit current source and a 10a+1 current source, wherein a is more than or equal to 1 and less than or equal to N-1, a is a positive integer, and the current value of the unit current source isThe current value of the 10a+1 current source is/>The second current source group includes: 10a+2 current source, the 10a+2 current source has a current value of/>The unit current source, the 10a+1 current source and the 10a+2 current source are connected with the output end of the current rudder converter through independent switches;
all the switches are turned on or off according to switch information on a binary node tree, the binary node tree comprises a plurality of distribution paths, each distribution path comprises N nodes, the nodes of each distribution path are respectively distributed from the 1 st level to the N th level, the nodes distributed on the 1 st level are root nodes of the binary node tree, each node corresponds to one piece of switch information, the switch information is generated according to N binary codes, when all the switches execute the switch information of the root nodes, all the switches corresponding to the unit current sources and the 10a+1 current sources are turned on, all the switches corresponding to the 10a+2 current sources are turned off, and when all the switches jump from the switch information corresponding to the node executing the a th level on the distribution path to the switch information corresponding to the node executing the a+1 th level, the current value in the second current source group is turned on Or, closing the current value in the first current source group to be/>A switch corresponding to the current source of (a).
2. The current-steering converter of claim 1, further comprising: an output resistor; the unit current source, the 10a+1 current source and the 10a+2 current source are respectively connected with the first ends of the corresponding switches, the second ends of the switches are connected with the first ends of the output resistors, the first ends of the output resistors are the output ends of the current steering converter, and the second ends of the output resistors are grounded.
3. The current-steering converter of claim 2, wherein if N = 4, the first current source group comprises: a unit current source, an 11 th current source, a 21 st current source, and a 31 st current source, the second current source group including: 12 th, 22 nd and 32 nd current sources;
The current value corresponding to the 11 th current source is The current value corresponding to the 21 st current source is/>The 31 st current source has a current value of/>; The current value corresponding to the 12 th current source is/>The current value corresponding to the 22 th current source is/>The current value corresponding to the 32 th current source is/>；
Each distribution path comprises 4 nodes, the nodes of each distribution path are respectively distributed in a1 st level to a4 th level, when all the switches execute the switch information of the root node, all the switches corresponding to the unit current source, the 11 th current source, the 21 st current source and the 31 st current source are turned on, and all the switches corresponding to the 12 th current source, the 22 nd current source and the 32 nd current source are turned off;
if a=2, when all the switches jump from executing the switch information corresponding to the node of the 2 nd level on the distribution path to executing the switch information corresponding to the node of the 3 rd level, the switch corresponding to the 22 nd current source is turned on, or the switch corresponding to the 21 st current source is turned off.
4. The current steering converter according to claim 1, wherein when all the switches jump from executing the switching information corresponding to the node of the N-1 th stage on the distribution path to executing the switching information corresponding to the node of the N-th stage, the switch of the unit current source is turned off, or the current value in the second current source group is turned onA switch corresponding to the current source of (a).
5. The current steering converter of claim 1, wherein when all of the switches jump from executing the switch information corresponding to the node of the a+1th stage to executing the switch information corresponding to the node of the a-th stage on the distribution path, the current value in the second current source group is turned off to beOr, turning on the current value in the first current source group to be/>A switch corresponding to the current source of (a).
6. The current-steering converter of claim 1, further comprising a controller for controlling the switching of the first current source group and the switching of the second current source group, the controller further for performing:
Acquiring the binary code of the N bits;
When the first code value is detected to be changed into the second code value, determining a first target node corresponding to the first code value on the binary node tree, and determining a second target node corresponding to the second code value on the binary node tree; wherein the first code value is the N-bit binary code before modification, and the second code value is the N-bit binary code after modification;
Determining a jump path on the binary node tree according to the first target node, the second target node and the distribution path, wherein the jump path is formed by partial paths or all paths forming one or more distribution paths;
and controlling all the switches to be opened or closed according to the switch information corresponding to the nodes on the jump path.
7. The current steering converter of claim 6, wherein the controller, when configured to execute the determining a jump path on the binary node tree based on the first target node, the second target node, and the distribution path, is specifically configured to execute:
determining a return path according to the first target node, the root node and the distribution path; the starting point of the return path is the first target node, and the end point of the return path is the root node;
Determining an adjustment path according to the second target node, the root node and the distribution path; the starting point of the adjustment path is the root node, and the end point of the adjustment path is the first target node;
And synthesizing the jump path according to the return path and the adjustment path.
8. The current steering converter of claim 6, wherein the controller, when configured to execute the determining a jump path on the binary node tree based on the first target node, the second target node, and the distribution path, is specifically configured to execute:
Determining a shortest path from the first target node to the second target node on the binary node tree according to the first target node, the second target node and the distribution path;
and determining the shortest path as the jump path.
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| CN202410219975.7A CN117792399B (en) | 2024-02-28 | Current rudder converter |
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| CN202410219975.7A CN117792399B (en) | 2024-02-28 | Current rudder converter |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07202698A (en) * | 1993-12-28 | 1995-08-04 | Nec Corp | A/d converter |
| JPH0918342A (en) * | 1995-06-30 | 1997-01-17 | Nec Corp | A/d converter |
| US6266002B1 (en) * | 1999-09-10 | 2001-07-24 | Cirrus Logic, Inc. | 2nd order noise shaping dynamic element matching for multibit data converters |
| US7183962B1 (en) * | 2004-05-17 | 2007-02-27 | Marvell International Ltd. | Low power asynchronous data converter |
| US7916063B1 (en) * | 2009-09-28 | 2011-03-29 | Robert Bosch Gmbh | Charge-sharing digital to analog converter and successive approximation analog to digital converter |
| WO2020190340A1 (en) * | 2019-10-29 | 2020-09-24 | Futurewei Technologies, Inc. | Successive approximation analog to digital converter |
| CN112511160A (en) * | 2019-09-14 | 2021-03-16 | 合肥艾创微电子科技有限公司 | High-speed ADC error calibration circuit |
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07202698A (en) * | 1993-12-28 | 1995-08-04 | Nec Corp | A/d converter |
| JPH0918342A (en) * | 1995-06-30 | 1997-01-17 | Nec Corp | A/d converter |
| US6266002B1 (en) * | 1999-09-10 | 2001-07-24 | Cirrus Logic, Inc. | 2nd order noise shaping dynamic element matching for multibit data converters |
| US7183962B1 (en) * | 2004-05-17 | 2007-02-27 | Marvell International Ltd. | Low power asynchronous data converter |
| US7916063B1 (en) * | 2009-09-28 | 2011-03-29 | Robert Bosch Gmbh | Charge-sharing digital to analog converter and successive approximation analog to digital converter |
| CN112511160A (en) * | 2019-09-14 | 2021-03-16 | 合肥艾创微电子科技有限公司 | High-speed ADC error calibration circuit |
| WO2020190340A1 (en) * | 2019-10-29 | 2020-09-24 | Futurewei Technologies, Inc. | Successive approximation analog to digital converter |
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