In this paper, we present the core switching noise analysis of the power distribution system (PDS) for a signal
processor on a card. The SPEED2000 [1], a spice and full-wave based simulation tool is used to study the
frequency and transient responses of the core switching noise. The correlation between the result in frequency
domain and time domain is discussed in detail. The frequency responses of the on-chip switching current and
package current are introduced to illustrate that the noise level caused by the high impedance of the PDSi s also
frequency dependent.
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