  We investigate the combined effect of rectification and nonlinear dynamics on
the behavior of several simple nonlinear circuits. We consider the classic
Resistor-Inductor-Diode (RLD) circuit driven by a low frequency source when an
operational amplifier with negative feedback is added to the circuit. Radio
frequency signals are applied to the circuit, causing significant changes in
the onset of period-doubling and chaos. Measurements indicate that this effect
is associated with a DC voltage induced by rectification of the RF signal in
the circuit. The combination of rectification and nonlinear circuit dynamics
produce qualitatively new behavior, which opens up a new channel of RF
interference in circuits.
