A design method of printed circuit board power supply network
A technology for printed circuit boards and power supply networks, used in printed circuits, printed circuit manufacturing, electrical components, etc., to solve problems such as inability to know the gap between reference boards, unreasonable standards, and reduced design margins
Active Publication Date: 2019-01-22
SPREADTRUM COMM (SHANGHAI) CO LTD
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Problems solved by technology
[0004] First, the requirements of the reference board will be very high, and it is impossible to know the gap between the design of the reference board and the actual index, which will undoubtedly reduce the design margin and increase the design difficulty;
[0005] Second, the standard is unreasonable. Compared with the reference board, it is difficult to have a designed frequency impedance curve that is all low. In most cases, some frequency points are high and some frequencies are low, and these designs are also up to standard during testing.
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[0045] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present invention.
[0046] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
[0047] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but not as a limitation of the present invention.
[0048] The present invention is based on the following findings:
[0049] The typical des...
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The invention discloses a design method of a printed circuit board power supply network, which obtains the maximum noise voltage and the maximum transient operating current allowed by the power supply; and obtains the DC target impedance and the AC target impedance according to the obtained maximum noise voltage and maximum transient operating current ;Design the power supply network model according to the obtained DC target impedance and AC target impedance; simulate the design results of the power supply network model to obtain the simulation results; judge whether the DC impedance simulation results and the AC impedance simulation results meet the design requirements, and if so, end ; If not, modify the power supply network model according to the obtained DC impedance simulation results and AC impedance simulation results, and repeat the simulation of the design results of the power supply network model. According to the sensitivity of the power supply with low power consumption and high current to DC noise and AC noise, the DC impedance and AC impedance are simulated respectively, and the frequency range to be realized by AC impedance is limited, which has engineering applicability and realizability.
Description
technical field [0001] The invention relates to the technical field of printed circuit board design, in particular to a design method for a printed circuit board power supply network. Background technique [0002] With the advancement of integrated circuit design technology and processing technology and people's demand for high-performance electronic equipment, circuit system design is developing in the direction of high speed, high current, low voltage, and low power consumption. The reduction of circuit operating voltage will inevitably lead to stricter requirements on power supply voltage noise, and the increase of system processing speed will also lead to the increase of average operating current and transient current and the increase of noise bandwidth. Transient current changes are one of the most fundamental causes of power supply noise. Under the condition that the design capability of the power distribution network (Power Delivery Network, PDN) remains unchanged, th...
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IPC IPC(8): H05K3/00
Inventor 罗雷雨
Owner SPREADTRUM COMM (SHANGHAI) CO LTD