An electronic circuit can be coupled to an energy harvesting device. The output of the energy harvesting device can provide a damped oscillating waveform elicited from a transient stimulus applied to the energy harvesting device, such as in response to mechanical shock or mechanical impact excitation. A first switch can be coupled between the energy harvesting device and an inductor and configured to selectively connect the input node to the inductor. A second switch can be coupled between the inductor and an energy storage device, the second switch configured to selectively couple the inductor to the energy storage device. A control circuit can be coupled to the first and second switches, such as configured to operate the first and second switches according to one or more of an over bias flip technique, a half bias flip technique, or a bias flip technique.