CN-122026686-A - Main board and direct current power supply circuit for medical ultrasonic wave

CN122026686ACN 122026686 ACN122026686 ACN 122026686ACN-122026686-A

Abstract

A main board for medical ultrasonic use and a DC power supply circuit comprise a core circuit, a peripheral circuit and a DC power supply circuit for supplying power, wherein the DC power supply circuit comprises a processor power supply device, a same-frequency and different-phase frequency controller and a plurality of local power supply devices. When the system ready signal indicates a working state, the same-frequency and out-of-phase frequency controller generates a plurality of phase shift frequency signals with the same frequency and different phases according to the core frequency signal. The processor power supply device and the local power supply device respectively generate core conversion power and peripheral conversion power according to the core frequency signal and the phase shift frequency signal. The peripheral conversion power is generated by the phase shift frequency signals with the same frequency and different phases, so that the source of the generated electromagnetic interference frequency is reduced, and the accuracy of ultrasonic imaging is improved.

Inventors

JI ZHONGHE
Lai Chenxian

Assignees

研华股份有限公司

Dates

Publication Date: 20260512
Application Date: 20241203
Priority Date: 20241112

Claims (8)

1. A motherboard for medical ultrasound use, comprising: A core circuit; multiple peripheral circuits A direct current supply circuit electrically connected to the core circuit and the peripheral circuit for supplying power to the core circuit and the peripheral circuit, and comprising: A total power supply device for providing a plurality of direct current power; A processor power supply device for generating a core frequency signal, and generating a core conversion power according to one of the DC power and the core frequency signal to provide to the core circuit, wherein the core frequency signal has a core frequency; A common frequency out-of-phase frequency controller electrically connected with the processor power supply device to receive the core frequency signal and a system ready signal, and generating a plurality of phase shift frequency signals according to the core frequency signal and the system ready signal, wherein the system ready signal is used for indicating one of a non-working state and a working state, and when the system ready signal indicates the working state, the working frequency of the phase shift frequency signals is the same as the core frequency and corresponds to different phases respectively; And the local power supply devices are electrically connected with the same-frequency and out-of-phase frequency controller and the total power supply device, and each local power supply device generates peripheral conversion power according to the corresponding direct-current power and the corresponding phase-shift frequency signal and provides the peripheral conversion power to the corresponding peripheral circuit.
2. The motherboard for medical ultrasound use according to claim 1, wherein the same-frequency and different-frequency controller comprises: A default frequency generator for generating a default frequency signal; A conversion frequency generator electrically connected to the processor power supply device for receiving the core frequency signal and generating a conversion frequency signal according to the core frequency signal, the conversion frequency signal having a working frequency identical to the core frequency of the core frequency signal, and A frequency selecting device electrically connected to the conversion frequency generator and the default frequency generator, and receiving the system ready signal, the default frequency signal from the default frequency generator, and the conversion frequency signal from the conversion frequency generator, and selecting one of the default frequency signal and the conversion frequency signal as an output frequency signal according to the system ready signal, and generating the phase shift frequency signal according to the output frequency signal, When the system ready signal indicates the working state, the frequency selecting device selects the conversion frequency signal as the output frequency signal to generate the phase shift frequency signals with the same working frequency as the core frequency and respectively corresponding to different phases.
3. The motherboard of claim 2, wherein the frequency selection device generates the phase shift frequency signals according to the default frequency signal when the system ready signal indicates the non-operating state, each of the phase shift frequency signals having an operating frequency identical to the default frequency signal.
4. The motherboard for medical ultrasound use according to claim 2, wherein when the system ready signal indicates the non-operating state, the local power supply device generates the peripheral converted power and supplies the peripheral converted power to the peripheral circuit, respectively, according to the phase shift frequency signal derived from the default frequency signal.
5. A dc power supply circuit for medical ultrasound use electrically connecting a core circuit and a plurality of peripheral circuits, comprising: A total power supply device for providing a plurality of direct current power; A processor power supply device for generating a core frequency signal, and generating a core conversion power according to one of the DC power and the core frequency signal to provide to the core circuit, wherein the core frequency signal has a core frequency; A common frequency out-of-phase frequency controller electrically connected with the processor power supply device to receive the core frequency signal and a system ready signal, and generating a plurality of phase shift frequency signals according to the core frequency signal and the system ready signal, wherein the system ready signal is used for indicating one of a non-working state and a working state, and when the system ready signal indicates the working state, the working frequency of the phase shift frequency signals is the same as the core frequency and corresponds to different phases respectively; And the local power supply devices are electrically connected with the same-frequency and out-of-phase frequency controller and the total power supply device, and each local power supply device generates peripheral conversion power according to the corresponding direct-current power and the corresponding phase-shift frequency signal and provides the peripheral conversion power to the corresponding peripheral circuit.
6. The direct current power supply circuit for medical ultrasound according to claim 5, wherein the same-frequency and different-frequency controller comprises: A default frequency generator for generating a default frequency signal; A conversion frequency generator electrically connected to the processor power supply device for receiving the core frequency signal and generating a conversion frequency signal according to the core frequency signal, the conversion frequency signal having a working frequency identical to the core frequency of the core frequency signal, and A frequency selecting device electrically connected to the conversion frequency generator and the default frequency generator, and receiving the system ready signal, the default frequency signal from the default frequency generator, and the conversion frequency signal from the conversion frequency generator, and selecting one of the default frequency signal and the conversion frequency signal as an output frequency signal according to the system ready signal, and generating the phase shift frequency signal according to the output frequency signal, When the system ready signal indicates the working state, the frequency selecting device selects the conversion frequency signal as the output frequency signal to generate the phase shift frequency signals with the same working frequency as the core frequency and respectively corresponding to different phases.
7. The direct current power supply circuit for medical ultrasound according to claim 6, wherein the frequency selection device generates the phase shift frequency signals according to the default frequency signal when the system ready signal indicates the non-operating state, each of the phase shift frequency signals having an operating frequency identical to the default frequency signal.
8. The direct current power supply circuit for medical ultrasound according to claim 6, wherein when the system ready signal indicates the non-operation state, the local power supply device generates the peripheral converted power and supplies the peripheral converted power to the peripheral circuit, respectively, according to the phase shift frequency signal derived from the default frequency signal.

Description

Main board and direct current power supply circuit for medical ultrasonic wave Technical Field The present invention relates to a power management device, and more particularly, to a power management device for a motherboard for medical ultrasound. Background Referring to fig. 1, a conventional motherboard power architecture is used for supplying power to a plurality of peripheral circuits 94 and a processor 95, and includes a power supply device 91, a plurality of power converters 93 and a processor power converter 96, wherein the power supply device 91 is electrically connected to the power converters 93 and the processor power converter 96 and provides a dc power. The processor power converter 96 generates a core power according to the DC power and a pulse modulation signal (602 kHz) and supplies the core power to the processor 95. The power converter 93 corresponds to pulse modulation signals (2.4 MHz, 750kHz, 800kHz, 1 MHz) with different operating frequencies, and the power converter 93 generates a peripheral power source according to the corresponding pulse modulation signals and the dc power source, and provides the peripheral power source to the peripheral circuit 94. However, the use of pulse modulation signals of various frequencies in the medical ultrasound generating system leads to the problem that the pulse modulation signals (and the accompanying harmonics thereof) used by the power converter 93 fall just within the scanning frequency band of the medical ultrasound, which results in interference to the scanning result, even if the processor shields the abnormal signals of 2.4MHz, 750kHz, 800kHz, 1MHz and their respective harmonics by additional calculation, since part of the frequencies are shielded by software due to interference, the numerical calculation results actually received by the ultrasound image for those frequencies are affected, and errors may occur in pathological determination. Regarding the above effects, another conventional motherboard power architecture, as shown in fig. 2, is proposed to use a single-frequency pulse modulation signal to reduce the interference sources in the ultrasonic scanning frequency band, which includes the power supply 91, a frequency generation circuit 92, a plurality of power converters 93, and the processor power converter 96. The connection relationship among the power supply device 91, the power converter 93, the peripheral circuit 94 and the processor 95 is the same as that described above, and the frequency generating circuit 92 is electrically connected to the power converter 93 and generates a plurality of pulse modulation signals with the same frequency and the same phase to the power converter 93. However, the power converter 93 affects the service life of the power supply device 91 due to the problem of excessive instantaneous power load and excessive radiant energy according to the pulse modulation signals with the same phase and the same frequency, and the power supply requirement for the power supply device 91 is increased due to the fact that the power wattage from the power supply device 91 is extracted at the same time, so that the energy is concentrated at the same time point too much, and the EMI performance is also deteriorated. Disclosure of Invention The object of the present invention is to provide a motherboard capable of increasing the accuracy of a medical ultrasonic wave generating system and avoiding an excessive instantaneous power load. The main board for medical ultrasonic use includes a core circuit, a plurality of peripheral circuits, and a DC power supply circuit. The direct current power supply circuit is electrically connected with the core circuit and the peripheral circuit and is used for supplying power to the core circuit and the peripheral circuit, and comprises a total power supply device, a processor power supply device, a same-frequency and different-phase frequency controller and a plurality of local power supply devices. The total power supply device is used for providing a plurality of direct current power. The processor power supply device is used for generating a core frequency signal, and generating core conversion power according to one of the direct current power and the core frequency signal to provide the core power to the core circuit. The core frequency signal has a core frequency. The same-frequency and out-of-phase frequency controller is electrically connected with the processor power supply device to receive the core frequency signal and a system ready signal, and generates a plurality of phase shift frequency signals according to the core frequency signal and the system ready signal. The system ready signal is used for indicating one of a non-working state and a working state. When the system ready signal indicates the working state, the working frequency of the phase shift frequency signal is the same as the core frequency and corresponds to different phases respectively. The local power