| 摘要 |
A shunt and shunt control circuit are connected to the wires of an on-chip terminated I/O bus. Each instance monitors the wire that it is connected to. If the wire has been pulled low by any device on the bus, the circuit does nothing. If, however, the wire was not pulled low, then current is shunted from the termination voltage supply to ground. The turn on and turn off rates for this shunt are matched to the ramps of current through the termination impedance of the bus. This makes the variability in current drawn from the termination voltage supply less data dependent.
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