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High Frequency Noise Analysis "Brush Noise Analysis"

High Frequency Noise Analysis "Brush Noise Analysis"

Example of motor brush noise wraparound analysis

An analysis of motor brush noise on the control board was conducted. When an impulse signal simulating brush noise was applied, significant noise was confirmed to be superimposed on the CPU communication signal terminal. It was found that inserting a 0.1μF capacitor at the motor terminal could significantly suppress the noise at the CPU terminal. However, using low-frequency electrolytic capacitors with self-resonance as noise killer capacitors was found to worsen the noise level at the CPU terminal compared to not using a capacitor. 【Features】 ○ The communication signal enters the CPU communication terminal via the path X1→IC3→CPU. ○ Investigate the effects when impulse noise is applied to the motor terminal. ○ Noise analysis requires an analysis of the entire board, including the implemented components. For more details, please contact us or download the catalog.

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High Frequency Noise Analysis "Electrostatic Noise (ESD) Analysis"

High Frequency Noise Analysis "Electrostatic Noise (ESD) Analysis"

Apply ESD noise signals between the absolute ground and the connector FG terminal.

Conducted electrostatic noise analysis on a 6-layer data recorder board. Observed the potential difference between the grounds of a BGA with multiple ground terminals. The difference in noise voltage with and without the bypass capacitors implemented on the board was minimal, showing little effect from the bypass capacitors. This phenomenon can be considered as a difference in common mode current flowing through each ground terminal. To analyze such phenomena, it is necessary to analyze the entire board in its component-mounted state. 【Features】 ○ Electrostatic noise analysis of a 6-layer board (100x50mm) ○ Applied ESD noise signal between absolute ground and connector FG terminal For more details, please contact us or download the catalog.

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High Frequency Noise Analysis "Common Mode Noise Analysis"

High Frequency Noise Analysis "Common Mode Noise Analysis"

Apply two common-mode noises to the power terminal.

Apply common-mode noise signals and examine the characteristics of the common-mode filter. It is easy to confirm which manufacturer's filter is optimal across a wide frequency range. 【Features】 ○ Apply two common-mode noise signals to the power terminals ○ Difference in noise voltage with and without the common-mode filter ○ Current distribution characteristics with and without the filter For more details, please contact us or download the catalog.

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Switching Noise Analysis: "Analysis of Motor Switching Noise"

Switching Noise Analysis: "Analysis of Motor Switching Noise"

Generate switching pulses within the CPU.

Examination of conduction noise during motor switching operation. A control pulse source is set within the CPU. The driver transistor and FET are driven, allowing current to flow to the motor. A noise level of -50dBV can be observed at the power supply terminals with a fundamental wave component. 【Features】 ○ Generation of switching pulses within the CPU ○ Switching of FET (non-linear operation based on SPICE model) For more details, please contact us or download the catalog.

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High Frequency Noise Analysis "RF Noise Analysis"

High Frequency Noise Analysis "RF Noise Analysis"

Analysis of the effects of external high-frequency noise.

By adding a layer on top and creating something equivalent to an antenna, it is possible to simulate external high-frequency noise. Whether the noise resistance has improved after the substrate modification can be estimated without creating the substrate. 【Features】 ○ Total terminal voltage when 900MHz is radiated from the upper antenna ○ It is evident that the induced voltage has decreased in the modified substrate ○ An assessment of quality can be made once the artwork is completed For more details, please contact us or download the catalog.

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Switching Noise Analysis: Conducted Noise Analysis of the DC-DC Converter Section

Switching Noise Analysis: Conducted Noise Analysis of the DC-DC Converter Section

Simulating switching characteristics using a MOSFET switch.

Examining the conducted noise of the DCDC converter during switching operation. Adding a 0.1uF capacitor at the power terminal reduces high-frequency noise, but it has been confirmed that noise increases around 6.7MHz. 【Features】 ○ Simulating switching characteristics using MOSFET switches ○ Nonlinear operation using SPICE models For more details, please contact us or download the catalog.

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Characteristic analysis of printed patterns using a microwave simulator.

Characteristic analysis of printed patterns using a microwave simulator.

Study of power supply impedance using circuit simulator (S-NAP/Pro)

In the design phase of print patterns, using simulators allows for efficient design and makes it easier to grasp essential issues. There are broadly two types of simulators used in microwaves: circuit simulators and electromagnetic field simulators. Circuit simulators are limited to specific circuit models but can perform circuit calculations based on Kirchhoff's laws, enabling very fast simulations. Electromagnetic field simulators, on the other hand, solve Maxwell's equations rigorously and can accurately simulate complex electromagnetic phenomena, but they require significantly more analysis time compared to circuit simulators. However, by appropriately distinguishing between these simulators, it is possible to efficiently identify and address issues. [Features] - Enables efficient design and makes it easier to grasp essential issues. - There are broadly two types of simulators used in microwaves: circuit simulators and electromagnetic field simulators. - By appropriately distinguishing between these simulators, it is possible to efficiently identify and address issues. For more details, please contact us or download the catalog.

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