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.