Digital-Noise Reduction with on-Chip Inductors

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Abstract

Digital-noise reduction with decoupling capacitors in ever faster (lower voltage/impedance) technologies for mixed-signal applications is being gradually rendered ineffective by line resistance to the capacitors. In contrast, blocking inductors show excellent noise reduction in SPICE simulations, the LdI/dt self-perturbance being solved with local auxiliary capacitors. The needed values for both inductances and capacitances are small, allowing their implementation in a multichip module (MCM), or alternative, technologies. Dynamic energy consumption is analyzed in the search for a capactive-inductive energy flow to partly circumvent the αCV2 dissipative mechanism.

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