Fuse trimming circuit and chip

Abstract

The utility model discloses a fuse trimming circuit and a chip, which solve the problem that NM0 is abnormally conducted due to the fact that a power pin is impacted by abnormal high voltage in the background technology by introducing a current adjusting device. The current control device can accurately output a first current to the fuse wire during circuit trimming, so that the joint of the fuse wire and the switching tube is maintained in a first state, the resistance value of the Poly-Fuse can be accurately adjusted, and when circuit trimming is not carried out, the current control device is switched to output a second current, so that the resistance value of the Poly-Fuse can be accurately adjusted. Therefore, the connection part of the fuse wire and the switch tube is maintained in the second state, and unnecessary circuit conduction is avoided. According to the design, the trimming circuit is effectively protected from being influenced by abnormal voltage, and the accuracy and the stability of the Read Circuit output trimming code are ensured.

Description

Technical Field

[0001] The utility model relates to the field of chip design, in particular to a fuse trimming circuit and a chip. Background Art

[0002] In analog chip design, poly-fuses are often used to generate trimming codes to change circuit parameters to meet design requirements. Figure 1 , Figure 1 In the circuit, the Inner Trim Signal is used to control the on / off state of NM0, thereby adjusting the current passing through the Poly-Fuse, thereby adjusting the resistance of the Poly-Fuse, and causing the Read Circuit to output the trim code 0 or 1.

[0003] Depend on Figure 1 As can be seen, the Poly-Fuse is directly connected to the Vcc pin regardless of its state. During application, the Vcc pin is susceptible to sudden abnormal high voltage surges. This surge may cause NM0 to abnormally conduct, affecting the accuracy of the trimming code output by the Read Circuit. Utility Model Content

[0004] The purpose of the utility model is to provide a fuse trimming circuit and chip, which effectively protect the trimming circuit from abnormal voltage and ensure the accuracy and stability of the trimming code output by the read circuit.

[0005] In one aspect, the present application provides a fuse trimming circuit, comprising a fuse and a switch tube, and further comprising:

[0006] a current regulating device, the current regulating device being connected to the switching tube via the fuse;

[0007] The switch tube is used to be turned on when the circuit is being adjusted, and turned off when the circuit is not being adjusted;

[0008] The current regulating device is configured to output a first current to the fuse when circuit trimming is being performed, so that the connection between the fuse and the switch is in a first state; and output a second current to the fuse when circuit trimming is not being performed, so that the connection between the fuse and the switch is in a second state;

[0009] The first current is greater than the second current.

[0010] In one embodiment, the current regulating device includes:

[0011] A first voltage source, configured to output a first voltage;

[0012] A first intermediate conversion module is provided between the first voltage source and the fuse, and is used to directly provide the first voltage output by the first voltage source to the fuse when circuit trimming is performed, so as to provide the first current to the fuse; when circuit trimming is not performed, convert the first voltage to obtain a second voltage, and provide the second voltage to the fuse to provide the second current to the fuse.

[0013] In one embodiment, the current regulating device includes:

[0014] a first current output device, connected to the switch tube via the fuse, configured to connect the fuse when circuit trimming is performed to provide the fuse with the first current, and disconnect from the fuse when circuit trimming is not performed;

[0015] The second current output device is connected to the switch tube through the fuse, and is used to be disconnected from the fuse when the circuit is being adjusted, and connected to the fuse when the circuit is not being adjusted, so as to provide the second current to the fuse.

[0016] In one embodiment, the first current output device includes a first current source, the second current device includes a second current source, and the fuse trimming circuit further includes a switch circuit;

[0017] The first current source is connected to the fuse through the switch circuit, and the second current source is connected to the fuse through the switch circuit;

[0018] The first current source is used to output the first current, and the second current source is used to output the second current;

[0019] The switching circuit is used to connect the path between the first current source and the fuse and disconnect the path between the second current source and the fuse when circuit trimming is performed, and to disconnect the path between the first current source and the fuse and connect the path between the second current source and the fuse when circuit trimming is not performed.

[0020] In one embodiment, the first current output device includes a first voltage source, the second current device includes a second voltage source, and the fuse trimming circuit further includes a switch circuit;

[0021] The first voltage source is connected to the fuse through the switch circuit, and the second voltage source is connected to the fuse through the switch circuit;

[0022] The first voltage source is used to output a first voltage, and the second current source is used to output a second voltage, and the first voltage is greater than the second voltage;

[0023] The switching circuit is used to connect the path between the first voltage source and the fuse and disconnect the path between the second voltage source and the fuse when circuit trimming is performed, and to disconnect the path between the first voltage source and the fuse and connect the path between the second voltage source and the fuse when circuit trimming is not performed.

[0024] In one embodiment, the second voltage source comprises:

[0025] a second intermediate conversion module, provided between the first voltage source and the switch circuit, for converting the first voltage output by the first voltage source into the second voltage;

[0026] The switching circuit is specifically used to connect the path between the first voltage source and the fuse and disconnect the path between the second intermediate conversion module and the fuse when circuit adjustment is performed, and to disconnect the path between the first voltage source and the fuse and connect the path between the second intermediate conversion module and the fuse when circuit adjustment is not performed.

[0027] In one embodiment, the switch circuit includes a first switch and a second switch;

[0028] When the first current output device includes a first current source and the second current device includes a second current source, the first switch is provided between the first current source and the fuse, and the second switch is provided between the second current source and the fuse;

[0029] When the first current output device includes a first voltage source and the second current device includes a second voltage source, the first switch is provided between the first voltage source and the fuse, and the second switch is provided between the second current source and the fuse;

[0030] The first switch is configured to be turned on when the circuit is being adjusted, and turned off when the circuit is not being adjusted;

[0031] The second switch is configured to be turned off when current adjustment is performed, and turned on when current adjustment is not performed.

[0032] In one embodiment, the first switch and the second switch are interlocked.

[0033] On the other hand, the present application provides a chip including the fuse trimming circuit as described above.

[0034] The present invention provides a fuse trimming circuit and chip. This circuit solves the problem in the background art of abnormal conduction of NM0 due to abnormal high voltage impact on the power pin by introducing a current adjustment device. The current adjustment device can accurately output a first current to the fuse when performing circuit trimming, so that the connection between the fuse and the switch tube is maintained in the first state, ensuring that the resistance value of the Poly-Fuse can be accurately adjusted. When the circuit trimming is not performed, the current adjustment device switches to outputting a second current, ensuring that the connection between the fuse and the switch tube is maintained in the second state, avoiding unnecessary circuit conduction. This design effectively protects the trimming circuit from the influence of abnormal voltage and ensures the accuracy and stability of the trimming code output by the Read Circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0036] Figure 1 A schematic diagram of a fuse trimming circuit in the prior art;

[0037] Figure 2 A schematic diagram of a fuse trimming circuit provided by the present invention;

[0038] Figure 3 A schematic diagram of a specific implementation of a fuse trimming circuit provided by the utility model;

[0039] Figure 4 This is a schematic diagram of a specific implementation of another fuse trimming circuit provided by the present invention. DETAILED DESCRIPTION

[0040] The core of the utility model is to provide a fuse trimming circuit and chip, which effectively protects the trimming circuit from abnormal voltage and ensures the accuracy and stability of the trimming code output by the Read Circuit.

[0041] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0042] On the one hand, if Figure 2 The present application provides a fuse trimming circuit, including a fuse and a switch tube, and also includes: a current adjustment device, the current adjustment device is connected to the switch tube through the fuse; the switch tube is used to be turned on when the circuit is trimmed and turned off when the circuit is not trimmed; the current adjustment device is used to output a first current to the fuse when the circuit is trimmed, so that the connection between the fuse and the switch tube is in a first state; when the circuit is not trimmed, the current adjustment device is used to output a second current to the fuse, so that the connection between the fuse and the switch tube is in a second state; the first current is greater than the second current.

[0043] The fuse trimming circuit provided in this application includes a fuse and a switching transistor, along with a current regulator. This circuit aims to address the voltage overshoot issue commonly seen in analog chip design. In this circuit, the switching transistor controls the on / off state during circuit trimming and remains off when not in trimming mode, ensuring proper circuit operation and accurate trimming.

[0044] The current regulator is connected to the switching transistor via a fuse. Its operating principle is as follows: During circuit trimming, the current regulator is adjusted to output a first current to the fuse. During this step, the magnitude of the first current is precisely controlled, maintaining the connection between the fuse and the switching transistor in a first state (e.g., outputting trim code 0). In this state, the resistance of the fuse is relatively high, such as 500 kΩ, under the influence of the first current.

[0045] When the circuit is not being trimmed, the current adjustment device switches to outputting a second current to the fuse. This second current is typically smaller, maintaining the connection between the fuse and the switch in the second state (e.g., outputting trim code 1). In this state, the resistance of the fuse adjusts to a predetermined value (e.g., 100Ω) under the influence of the second current. This typically ensures normal circuit operation while avoiding unnecessary energy consumption or circuit interference.

[0046] The design principle of this application is that the magnitude of the first current is significantly greater than the second current, ensuring that the fuse can be accurately adjusted to a specific resistance value during trimming and maintain a stable operating state during normal operation. This precise current control mechanism not only improves the accuracy and reliability of circuit trimming, but also effectively prevents abnormal circuit conduction caused by abnormal high voltage shocks, thereby ensuring the performance and reliability of the entire circuit.

[0047] In one embodiment, the current adjustment device includes: a first voltage source for outputting a first voltage; a first intermediate conversion module, arranged between the first voltage source and the fuse, for directly providing the first voltage output by the first voltage source to the fuse when circuit adjustment is performed, so as to provide the fuse with a first current; and when circuit adjustment is not performed, converting the first voltage to obtain a second voltage and providing the second voltage to the fuse to provide the fuse with a second current.

[0048] In this embodiment, the current adjustment device is designed to achieve effective management of the fuse trimming circuit by accurately controlling the output of the voltage. Figure 3 , the current regulating device comprises the following components:

[0049] The first voltage source is responsible for outputting the required first voltage, which is usually a pre-set voltage value and is used to provide the fuse when the circuit is trimmed. The first intermediate conversion module is located between the first voltage source and the fuse. When the circuit is trimmed, the first intermediate conversion module directly transmits the first voltage output by the first voltage source to the fuse to provide the first current to the fuse; when the circuit is not trimmed, the first intermediate conversion module converts the first voltage to generate a second voltage, and provides the second voltage to the fuse to provide the second current. Among them, Figure 3 The control signal in is used to control the first intermediate conversion module.

[0050] The specific operating principle is as follows: when the circuit requires trimming, the current adjustment device provides a specific first voltage to the first intermediate conversion module via a first voltage source. This first voltage is directly transmitted to the fuse, causing it to generate a preset first current, thereby adjusting the fuse's resistance to meet the trimming requirements. When trimming is not in progress, the current adjustment device converts the first voltage via the first intermediate conversion module to generate a smaller second voltage, which is then supplied to the fuse, generating a smaller second current. This design ensures that the fuse's resistance can be effectively adjusted and controlled in different operating modes, thereby achieving precise correction of circuit parameters and stable operation.

[0051] Overall, this current adjustment device effectively solves the problem of the need for precise current control during fuse trimming through reasonable voltage management and conversion mechanisms, while ensuring stable circuit performance and reliability during normal operation.

[0052] In one embodiment, the current adjustment device includes: a first current output device, connected to the switching tube through a fuse, used to connect the fuse when circuit adjustment is performed to provide a first current to the fuse, and disconnected from the fuse when circuit adjustment is not performed; a second current output device, connected to the switching tube through a fuse, used to disconnect from the fuse when circuit adjustment is performed, and connected to the fuse when circuit adjustment is not performed to provide a second current to the fuse.

[0053] In this embodiment, the current adjustment device is designed to control the current of the fuse through two independent current output devices, thereby achieving precise control of circuit trimming. The specific device is as follows:

[0054] The first current output device is connected to the switching tube via a fuse and is used to connect to the fuse during circuit adjustment to provide a first current to the fuse. When the circuit is not being adjusted, the first current output device is disconnected from the fuse and no current is provided to the fuse. The second current output device is connected to the switching tube via a fuse and is used to disconnect from the fuse during circuit adjustment to ensure that no unnecessary current flows through the fuse during circuit adjustment. When the circuit is not being adjusted, the second current output device is connected to the fuse to provide a second current to the fuse.

[0055] The operating principle of these two current output devices is that when adjusting the circuit, one of the devices is selectively connected to the fuse as needed to control the fuse's current output. For example, to increase the fuse resistance, the first current output device is connected, providing a higher first current; to decrease the fuse resistance, the second current output device is connected, providing a lower second current.

[0056] The key advantage of this design is that it controls the fuse's state by switching between different current output devices, thus avoiding the potential for abnormal circuit conduction during the trimming process. By precisely controlling the current input to the fuse, the circuit can accurately adjust its parameters to meet design requirements and maintain stable operation in its untrimmed state.

[0057] In one embodiment, the first current output device includes a first current source, the second current device includes a second current source, and the fuse trimming circuit further includes a switching circuit; the first current source is linked to the fuse through the switching circuit, and the second current source is connected to the fuse through the switching circuit; the first current source is used to output a first current, and the second current source is used to output a second current; the switching circuit is used to connect the path between the first current source and the fuse and disconnect the path between the second current source and the fuse when circuit trimming is performed, and disconnect the path between the first current source and the fuse and connect the path between the second current source and the fuse when circuit trimming is not performed.

[0058] In this embodiment, the fuse trimming circuit achieves precise adjustment of the fuse current by introducing the first current output device and the second current output device in combination with the control of the switch circuit, thereby achieving the purpose of circuit parameter adjustment.

[0059] The switch circuit's primary function is to switch the connection between the first and second current sources and the fuse based on the trimming status. During circuit trimming, the switch circuit connects the first current source to the fuse while disconnecting the second current source from the fuse, ensuring the fuse receives the required first current. When not in trimming mode, the switch circuit reverses its operation, connecting the second current source to the fuse while disconnecting the first current source from the fuse, allowing the fuse to receive the second current.

[0060] This design, through proper current source selection and switch control, precisely adjusts the fuse resistance to meet varying circuit trimming requirements. Furthermore, the switching circuit effectively avoids current confusion or abnormal conduction between trimming and normal operation, ensuring circuit stability and reliability.

[0061] In one embodiment, the first current output device includes a first voltage source, the second current device includes a second voltage source, and the fuse trimming circuit further includes a switching circuit; the first voltage source is linked to the fuse through the switching circuit, and the second voltage source is connected to the fuse through the switching circuit; the first voltage source is used to output a first voltage, and the second current source is used to output a second voltage, and the first voltage is greater than the second voltage; the switching circuit is used to connect the path between the first voltage source and the fuse and disconnect the path between the second voltage source and the fuse when circuit trimming is performed, and disconnect the path between the first voltage source and the fuse and connect the path between the second voltage source and the fuse when circuit trimming is not performed.

[0062] In this embodiment, the fuse trimming circuit is designed with a mechanism for precisely controlling the fuse current to achieve accurate adjustment and optimization of circuit parameters.

[0063] Specifically, the first current output device includes a first voltage source, which is connected to the fuse via a switching circuit. When the circuit is being adjusted, the first voltage source is turned on via the switching circuit, and the first voltage is directly output to the fuse, forming a first current. The output voltage of the first voltage source is designed to be higher than the output voltage of the second current output device, ensuring that sufficient current can be provided to change the resistance value of the fuse during adjustment. The second current output device includes a second voltage source, which is also connected to the fuse via a switching circuit. When the circuit is not being adjusted, the switching circuit switches to the on state, so that the voltage of the second voltage source is output to the fuse, forming a second current. The output voltage of the second voltage source is relatively low, and is used to maintain the current required for the circuit to operate normally, so as to maintain the specific resistance state of the fuse.

[0064] The switching circuit is responsible for switching the connection between different voltage sources and the fuse according to the circuit's operating state. When the circuit is being adjusted, the switching circuit connects the first voltage source to the fuse while disconnecting the second voltage source from the fuse, ensuring that the fuse receives the first voltage and generates the corresponding first current. When the circuit is not being adjusted, the switching circuit reverses its operation, connecting the second voltage source to the fuse while disconnecting the first voltage source from the fuse, ensuring that the fuse receives the second voltage and maintains the second current required for normal operation.

[0065] This design effectively and precisely controls the fuse current, adjusting the fuse resistance to meet circuit design requirements. This approach not only ensures the accuracy and stability of circuit parameters during adjustment, but also protects the circuit from external voltage fluctuations, improving overall circuit reliability and performance.

[0066] In one embodiment, the second voltage source includes: a second intermediate conversion module, arranged between the first voltage source and the switching circuit, for converting the first voltage output by the first voltage source into a second voltage; a switching circuit, specifically used to connect the path between the first voltage source and the fuse and disconnect the path between the second intermediate conversion module and the fuse when circuit trimming is performed, and disconnect the path between the first voltage source and the fuse and connect the path between the second intermediate conversion module and the fuse when circuit trimming is not performed.

[0067] In this embodiment, the second voltage source includes a second intermediate conversion module, which is located between the first voltage source and the switching circuit. The first voltage output by the first voltage source is first converted by the second intermediate conversion module to generate a second voltage. The second voltage is lower than the first voltage and is used to provide a corresponding second current to the fuse when circuit trimming is not performed. When the switching circuit is performing circuit trimming, the switching circuit opens the path between the first voltage source and the fuse, while simultaneously opening the path between the second intermediate conversion module and the fuse, so that the fuse receives the first voltage and generates the corresponding first current. When circuit trimming is not performed, the switching circuit reverses its operation, opening the path between the first voltage source and the fuse, while simultaneously opening the path between the second intermediate conversion module and the fuse, ensuring that the fuse receives the second voltage to maintain the second current required for normal operation.

[0068] The key to this design is the introduction of a second intermediate conversion module, which converts the voltage output by the first voltage source to generate a second voltage suitable for the trimming state, thereby ensuring that the fuse can receive the correct current input in different operating modes.

[0069] In one embodiment, the switch circuit includes a first switch and a second switch. When the first current output device includes a first current source and the second current device includes a second current source, the first switch is disposed between the first current source and a fuse, and the second switch is disposed between the second current source and the fuse. When the first current output device includes a first voltage source and the second current device includes a second voltage source, the first switch is disposed between the first voltage source and the fuse, and the second switch is disposed between the second current source and the fuse. The first switch is configured to be turned on when circuit trimming is being performed and turned off when circuit trimming is not being performed. The second switch is configured to be turned off when current trimming is being performed and turned on when circuit trimming is not being performed. In one embodiment, the first switch and the second switch are interlocked.

[0070] In this embodiment, the fuse trimming circuit uses a switch circuit, which includes a first switch and a second switch, such as Figure 4 , the first switch is K, the second switch is An interlocking mechanism is implemented between the two to ensure that the circuit can correctly adjust the current output in different operating modes. Figure 4 The control signal in is used to control the first switch and the second switch. The first switch and the second switch can be the normally open contact and normally closed contact corresponding to the relay coil.

[0071] Specifically, the first switch is responsible for being turned on when circuit trimming is in progress, allowing the corresponding current source (whether a current source or a voltage source) to output a first current or a first voltage to the fuse, thereby performing a trimming operation. When circuit trimming is not in progress, the first switch is turned off to prevent unnecessary current or voltage from being input into the fuse.

[0072] The second switch is closed during circuit trimming, ensuring that the second current source or second voltage source does not output current or voltage to the fuse during this period. When circuit trimming is not in progress, the second switch is open to ensure that the current or voltage required for normal circuit operation can flow through the fuse.

[0073] This interlocking mechanism effectively ensures circuit stability and reliability in different operating modes, preventing conflicts between current sources or circuit anomalies, thereby ensuring accurate and safe circuit trimming. This interlocking design allows the fuse trimming circuit to operate stably in different operating modes, avoiding conflicts between current sources or circuit anomalies, ensuring accurate and reliable circuit trimming. This mechanism not only improves circuit performance and stability, but also effectively protects the fuse and related circuit components from unnecessary damage or interference.

[0074] In another aspect, a chip includes the fuse trimming circuit as described above.

[0075] For an introduction to the chip, please refer to the above embodiments, and this application will not go into details here.

[0076] It should also be noted that, in this specification, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0077] The above description of the disclosed embodiments will enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fuse trimming circuit, comprising a fuse and a switch tube, characterized in that: Also includes: a current regulating device, the current regulating device being connected to the switching tube via the fuse; The switch tube is used to be turned on when the circuit is being adjusted, and turned off when the circuit is not being adjusted; The current adjustment device is used to output a first current to the fuse when performing circuit adjustment, so that the connection between the fuse and the switch tube is in a first state; outputting a second current to the fuse when the circuit is not adjusted, so that the connection between the fuse and the switch tube is in a second state; The first current is greater than the second current.

2. The fuse trimming circuit according to claim 1, wherein: The current regulating device comprises: A first voltage source, configured to output a first voltage; A first intermediate conversion module is provided between the first voltage source and the fuse, and is used to directly provide the first voltage output by the first voltage source to the fuse when circuit trimming is performed, so as to provide the first current to the fuse; when circuit trimming is not performed, convert the first voltage to obtain a second voltage, and provide the second voltage to the fuse to provide the second current to the fuse.

3. The fuse trimming circuit according to claim 1, wherein: The current regulating device comprises: a first current output device, connected to the switch tube via the fuse, configured to connect the fuse when circuit trimming is performed to provide the fuse with the first current, and disconnect from the fuse when circuit trimming is not performed; The second current output device is connected to the switch tube through the fuse, and is used to be disconnected from the fuse when the circuit is being adjusted, and connected to the fuse when the circuit is not being adjusted, so as to provide the second current to the fuse.

4. The fuse trimming circuit according to claim 3, wherein: The first current output device includes a first current source, the second current device includes a second current source, and the fuse trimming circuit further includes a switch circuit; The first current source is connected to the fuse through the switch circuit, and the second current source is connected to the fuse through the switch circuit; The first current source is used to output the first current, and the second current source is used to output the second current; The switching circuit is used to connect the path between the first current source and the fuse and disconnect the path between the second current source and the fuse when circuit trimming is performed, and to disconnect the path between the first current source and the fuse and connect the path between the second current source and the fuse when circuit trimming is not performed.

5. The fuse trimming circuit according to claim 3, wherein: The first current output device includes a first voltage source, the second current device includes a second voltage source, and the fuse trimming circuit further includes a switch circuit; The first voltage source is connected to the fuse through the switch circuit, and the second voltage source is connected to the fuse through the switch circuit; The first voltage source is used to output a first voltage, and the second current source is used to output a second voltage, and the first voltage is greater than the second voltage; The switching circuit is used to connect the path between the first voltage source and the fuse and disconnect the path between the second voltage source and the fuse when circuit trimming is performed, and to disconnect the path between the first voltage source and the fuse and connect the path between the second voltage source and the fuse when circuit trimming is not performed.

6. The fuse trimming circuit according to claim 5, wherein: The second voltage source comprises: a second intermediate conversion module, provided between the first voltage source and the switch circuit, for converting the first voltage output by the first voltage source into the second voltage; The switching circuit is specifically used to connect the path between the first voltage source and the fuse and disconnect the path between the second intermediate conversion module and the fuse when circuit adjustment is performed, and to disconnect the path between the first voltage source and the fuse and connect the path between the second intermediate conversion module and the fuse when circuit adjustment is not performed.

7. The fuse trimming circuit according to claim 4 or 5, wherein: The switch circuit includes a first switch and a second switch; When the first current output device includes a first current source and the second current device includes a second current source, the first switch is provided between the first current source and the fuse, and the second switch is provided between the second current source and the fuse; When the first current output device includes a first voltage source and the second current device includes a second voltage source, the first switch is provided between the first voltage source and the fuse, and the second switch is provided between the second current source and the fuse; The first switch is configured to be turned on when the circuit is being adjusted, and turned off when the circuit is not being adjusted; The second switch is configured to be turned off when current adjustment is performed, and turned on when current adjustment is not performed.

8. The fuse trimming circuit according to claim 7, wherein: The first switch and the second switch are interlocked.

9. A chip, characterized in that: The invention comprises a fuse trimming circuit as claimed in any one of claims 1 to 8.

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