| CPC H03K 19/23 (2013.01) [H03K 19/018521 (2013.01); H03K 19/185 (2013.01)] | 20 Claims |

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1. An apparatus comprising:
a first capacitor to receive a first input, the first capacitor coupled to a node;
a second capacitor to receive a second input, the second capacitor coupled to the node;
a third capacitor to receive a third input, the third capacitor coupled to the node;
an inverter having an input coupled to the node; and
a NOR gate having an input coupled to an output of the inverter.
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