CN-122001362-A - Driving circuit, circuit board assembly and electronic equipment

CN122001362ACN 122001362 ACN122001362 ACN 122001362ACN-122001362-A

Abstract

The embodiment of the application relates to the technical field of circuits and discloses a driving circuit, a circuit board assembly and electronic equipment, wherein the driving circuit comprises a power supply module, an impedance module and a time delay module, wherein the power supply module is connected to a first end of the impedance module, a second end of the impedance module is grounded, the impedance module comprises N parallel switch branches, the first ends of the N switch branches are jointly used as the first ends of the impedance module, the second ends of the N switch branches are jointly used as the second ends of the impedance module, N is an integer larger than 1, and the time delay module comprises N output ends which are in one-to-one correspondence with the N switch branches. The embodiment of the application ensures that the amplitude, the output impedance and the lifting delay rate of the driving voltage output by the driving circuit can be respectively adjusted, thereby improving the precision of the output signal of the driving circuit.

Inventors

WENG SIYOU
XU CHANGXI

Assignees

宁波奥拉半导体股份有限公司

Dates

Publication Date: 20260508
Application Date: 20241107

Claims (10)

1. The driving circuit is characterized by comprising a power supply module, an impedance module and a time delay module; The power supply module is connected to the first end of the impedance module, and the second end of the impedance module is grounded, the impedance module comprises N parallel switch branches, the first ends of the N switch branches are used as the first ends of the impedance module together, the second ends of the N switch branches are used as the second ends of the impedance module together, N is an integer greater than 1, and the time delay module comprises N output ends which are connected with the N switch branches in a one-to-one correspondence manner; The power supply module is used for outputting variable output voltage, the time delay module is used for generating N time delay signals according to a reference control signal, the generation time of the N time delay signals is different, each time delay signal is output to the corresponding switch branch, each switch branch also receives a control switch control signal, the switch branch is turned on or turned off according to the time delay signals and the switch control signals, and the N switch branches jointly output driving voltage.
2. The driving circuit according to claim 1, wherein the delay module comprises N sub-delay modules, the input ends of the N sub-delay modules are used for acquiring the reference control signals, the output ends of the N sub-delay modules serve as N output ends of the delay module, and delay time of the N sub-delay modules is set according to a preset time interval.
3. The driving circuit according to claim 1, wherein the switching branch circuit comprises a first switching tube, a second switching tube, a first resistor, a second resistor and a logic control unit, wherein a first end of the first resistor is used as a first end of the switching branch circuit, a second end of the first resistor is connected with the first end of the first switching tube, a second end of the first switching tube is connected with the first end of the second switching tube, a second end of the second switching tube is connected with the first end of the second resistor, and a second end of the second resistor is grounded; the first output end of the logic control unit is connected with the control end of the first switching tube, and the second output end of the logic control unit is connected with the control end of the second switching tube; the first input end of the logic control unit is connected with one output end of the time delay module and is used for receiving the time delay signal; And a node between the second end of the first switching tube and the first end of the second switching tube is an output node, and the output nodes of the N switching branches jointly output the driving voltage.
4. The driving circuit of claim 3, wherein the first switching tube is a PMOS tube and the second switching tube is an NMOS tube.
5. The driving circuit according to claim 4, wherein a first output terminal of the logic control unit outputs a first level signal controlling the first switching tube to be turned on, and a second output terminal of the logic control unit outputs a second level signal controlling the second switching tube to be turned off, in a case where the delay signal is high and the switching control signal is high.
6. The drive circuit according to claim 5, wherein the logic control unit comprises an or gate, a not gate, an and gate; The first input end of the OR gate receives the time delay signal, the input end of the NOT gate receives the switch control signal, the output end of the NOT gate is connected with the second input end of the OR gate, and the output end of the OR gate is connected with the control end of the first switch tube as the first output end of the logic control unit; The first input end of the AND gate receives the time delay signal, the second input end of the AND gate receives the switch control signal, and the output end of the AND gate is used as the second output end of the logic control unit and connected with the control end of the second switch tube.
7. The drive circuit of claim 1, wherein the power supply module comprises a variable current source, a variable resistor, an error amplifier; the output end of the variable current source is connected with the first end of the variable resistor, and the second end of the variable resistor is grounded; the output end of the variable current source is also connected with the negative end of the error amplifier, and the output end of the error amplifier is connected with the positive end of the error amplifier.
8. The drive circuit of claim 2, wherein the sub-delay module is an RC delay circuit.
9. A circuit board assembly comprising the drive circuit of any one of claims 1-8.
10. An electronic device comprising the circuit board assembly of claim 9.

Description

Driving circuit, circuit board assembly and electronic equipment Technical Field The embodiment of the application relates to the technical field of circuits, in particular to a driving circuit, a circuit board assembly and electronic equipment. Background Currently, driving circuits are important blocks in integrated circuits that serve to transfer signals from one integrated circuit to other circuit blocks. The potential, impedance and rising and falling edge speed of the driving circuit in the related art are directly set according to the input and output of the driving circuit. However, the circuit system has been developed for many years, and the driving circuit has requirements on signal amplitude, rising and falling edge rate and driving circuit impedance during signal interaction, so that the requirements of the driving circuit on signal amplitude, rising and falling edge rate and driving circuit impedance in the prior art cannot be met by the related art. Disclosure of Invention The embodiment of the application aims to provide a driving circuit, a circuit board assembly and electronic equipment, so that the amplitude, the output impedance and the lifting delay rate of driving voltage output by the driving circuit can be respectively adjusted, and the accuracy of a signal output by the driving circuit is improved. The embodiment of the application provides a driving circuit which comprises a power supply module, an impedance module and a time delay module, wherein the power supply module is connected to a first end of the impedance module, a second end of the impedance module is grounded, the impedance module comprises N parallel switch branches, the first ends of the N switch branches are used as the first ends of the impedance module together, the second ends of the N switch branches are used as the second ends of the impedance module together, N is an integer larger than 1, the time delay module comprises N output ends which are connected with the N switch branches in a one-to-one correspondence manner, the power supply module is used for outputting variable output voltage, the time delay module is used for generating N time delay signals according to a reference control signal, the generation time of the N time delay signals is different, each time delay signal is output to the corresponding switch branch, each switch branch also receives a control switch control signal, the switch branch is turned on or off according to the time delay signals and the switch control signals, and the N switch branches are used for outputting the driving voltage together. The embodiment of the application also provides a circuit board assembly which comprises the driving circuit. The embodiment of the application also provides electronic equipment, which comprises the circuit board assembly. In some embodiments, the delay module includes N sub-delay modules, input ends of the N sub-delay modules are all used for obtaining the reference control signal, output ends of the N sub-delay modules serve as N output ends of the delay module, and delay time of the N sub-delay modules is set according to a preset time interval. In some embodiments, the switch branch comprises a first switch tube, a second switch tube, a first resistor, a second resistor and a logic control unit, wherein the first end of the first resistor is used as the first end of the switch branch, the second end of the first resistor is connected with the first end of the first switch tube, the second end of the first switch tube is connected with the first end of the second switch tube, the second end of the second switch tube is connected with the first end of the second resistor, and the second end of the second resistor is grounded; the first output end of the logic control unit is connected with the control end of the first switching tube, and the second output end of the logic control unit is connected with the control end of the second switching tube; the first input end of the logic control unit is connected with one output end of the time delay module and is used for receiving the time delay signal; And a node between the second end of the first switching tube and the first end of the second switching tube is an output node, and the output nodes of the N switching branches jointly output the driving voltage. In some embodiments, the first switching tube is a PMOS tube and the second switching tube is an NMOS tube. In some embodiments, when the delay signal is at a high level and the switch control signal is at a high level, the first output end of the logic control unit outputs a first level signal for controlling the first switch tube to be turned on, and the second output end of the logic control unit outputs a second level signal for controlling the second switch tube to be turned off. In some embodiments, the logic control unit comprises an or gate, an not gate, an and gate; The first input end of the OR gate receives the time delay signal,