# jim teune

### Impact of Decoupling Capacitors and Embedded Capacitance on Impedance of Power and Ground Planes: Part II

We investigate two four-layer PCBs with power and ground plane pairs spaced 3 mils and 30 mils apart.

### Impact of Decoupling Capacitors and Embedded Capacitance on Impedance of Power and Ground Planes: Part I

We investigate two four-layer PCBs with power and ground plane pairs spaced 3 mils and 30 mils apart.

### EMC Units in Measurements and Testing

This article reviews the decibel units used in EMC laboratory measurements and testing. We begin by defining a decibel (dB) unit and proceed to the EMC specific units for voltage, current, power, and impedance measurements.

### Impedance of the Four Passive Circuit Components: R, L, C, and a PCB Trace

This article investigates the impedance of the three standard passive circuit components (R, L, and C) as well as the frequency response of a PCB trace.

### S-Parameters Tutorial – Part II: EMC Measurements and Testing

This part II of the s-parameter tutorial presents several examples of the s-parameter use in EMC measurements and testing.

### Impact of a Trace Length on Capacitor Frequency Response

In this article we investigate the frequency behavior of a ceramic capacitor.

### Common-Impedance Coupling Between Circuits

For common-impedance coupling to occur, two circuits must share a current path (with a non-negligible impedance)

### Topology and Characterization of a DC Line Impedance Stabilization Network

This article discusses the topology and characteristics of a dc Line Impedance Stabilization Network (LISN), often referred to as an Artificial Network (AN).

### Alternative Paths of the Return Current

Consider a two-sided PCB with a single trace on top and full copper ground plane on the bottom.

### Spectra of Digital Clock Signals

Reducing the duty cycle (the pulsewidth) reduces the low-frequency spectral content of the waveform, but does not affect the high-frequency content.

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