LTCC (Low Temperature Co-fired Ceramic) The use of LTCC material is gaining importance in applications in the field of communications. This is a multi-layer process used for the production of sophisticated HF components with good performance characteristics. The...
Power FLEX transformers The FLEX transformers (Figure 2.86) are especially well suited for DC-DC converters in the lower power rang. As a result of their winding structure, consisting of six individual windings each with the same number of...
xDSL Digital Subscriber Line transformers The xDSL Digital Subscriber Line transformers (Figure 2.85) are specialized line interface transformers that are designed to optimise the performance of DSL chipsets. With each chipset varying in power drive levels, impedance characteristics...
LAN and LAN RJ45 series Ethernet transformers The LAN Ethernet transformers (Figure 2.82) are not simple transformers, but rather modules in which, depending on the number of ports for which they are suitable, at least two transformers and...
As illustrated with the transformer equivalent circuit, transformers have numerous parasitic properties, which can have a negative effect on the signal. In this chapter it is therefore explained why and where one applies transformers. An additional section deals...
SMD NiZn Ferrite Core Storage Choke SMD storage chokes with highly dynamic and low loss NiZn ferrite cores (such as Würth Elektronik WE-PD series) are suitable as chokes in switching control applications up to a clock frequency of...
2.3 Power Inductors and Calculations Switched-mode power supplies are becoming ever more widespread. The semiconductor manufacturers have made their contribution, offering a wide range these integrated circuits with simplified circuit design. Care must be taken in the selection...
2.2 Current compensated chokes Saturation effects caused by high signal currents, or DC current super imposed on the signal, reduce the effectiveness of the choke. The use of standard inductors in the signal path adversely impairs the useful...
2.1 Coil with ferrite inductors SMD-Multilayer Inductor If the wire windings on the outside of a conventional “coil” are mounted inside the coil body, the so-called multilayer SMD inductor (Figure 2.32) is created. Fig. 2.32: SMD-Multilayer inductor; image...
Successful design of broadband EMC filters necessitates consideration of the actual (broadband) response of all the components used. The correct method can vary widely for different components. The actual terminations of the filter can, under certain circumstances, nullify...
