Abstract
A new concept of target impedance which directly correlates the I/O buffer output jitter with the power distribution network (PDN) design is proposed. Jitter-ware target impedance is derived from the time domain waveform of power voltage ripple and the maximum allowable jitter assuming the single stage buffer as a RC network, which is then applied to the PDN design given a certain jitter specification. From HSPICE simulation of transient switching current, PDN impedance and power voltage ripple, it is shown that the proposed jitter-aware target impedance successfully correlates power supply induced jitter (PSIJ) and PDN impedance parameters with a simple analytical expression.
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