From Syfer Technology Limited
The challenges facing electronics designers today are ever-increasing. Conflicting requirements conspire to force them to develop new techniques to fulfill their design requirements. The pressure is on for lower cost, smaller size and higher performance levels. Mobile phones and hand-held computer products are typical examples of devices offering greater functionality in ever smaller packages.
These requirements, combined with increasing frequencies, lower signal levels, more densely populated boards and, not least, EMC legislation, have driven the need for new passive components to enable the realisation of the new designs.
As digital and analogue frequencies are constantly increasing, ESL (Equivalent Series Inductance) and ESR (Equivalent Series Resistance) become significant factors in circuit performance. In particular, low ESL and ESR values are required to ensure the proper performance of DSPs (Digital Signal Processors) which may have signal speeds of up to 300 MHZ and above.
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8.7 Bedspring Capacitor Model Figure 8.53 showed the measured impedance and the extracted C( f), ESR( f), and ESL( f) values for a 10- ?F 0508 reverse-geometry MLCC part mounted on a small fixture.
