The first non-linear device 204 and the second non-linear device 206 are coupled to a node 212 in the circuit 200. The first non-linear device 204 is coupled (directly or indirectly) to a first line 214. The second non-linear device 206 is coupled to a second line 216. In some embodiments, the first and second non-linear devices 204, 206 each include a plurality of AMNRs coupled as an array between the node 212 and the first or second line 214, 216—for example, two or more AMNRs successively coupled in series between the node 212 and the second line 216. The first line 214 and the second line 216 respectively couple first and second electric signals to the first non-linear device 204 and the second non-linear device 206 from one or more external sources, such as a control system external to the circuit 200.