Method and apparatus for power sequence timing to mitigate supply resonance in power distribution network

摘要

The transient load current of a circuit powered by a power distribution network is increased in a plurality of steps, with the step transition times being adjusted based on the transient noise of the power distribution network. This reduces the resonance noise that would otherwise occur in the supply current of the power distribution network.

主权项

1. A system, comprising:
a first circuit powered by a power distribution network and configured to receive a control signal that is based on communication of one or more output signals outputted by the first circuit, the control signal causing transient load current of the first circuit to increase in magnitude in a plurality of steps at a plurality of step transition times according to the control signal, and the first circuit further configured to generate the one or more output signals, a value of the one or more output signals based on the magnitude of the transient load current; a second circuit configured to communicate with the first circuit to receive the one or more output signals from the first circuit; a noise measurement circuit configured to generate a noise measurement signal indicative of noise in the power distribution network based on the communication of the one or more output signals from the first circuit to the second circuit; and a sequencer circuit configured to receive the noise measurement signal based on the communication of the one or more output signals and generate the control signal causing the transient load current of the first circuit to increase in magnitude.