Abstract: An apparatus for verifying an osteotomy trajectory includes a straight rod portion extending along a first axis in a first direction, a sliding arm slidably coupled to the straight rod portion and configured to slide along a sliding direction on the straight rod portion along the first axis. The sliding arm may include a sliding portion slidably coupled to the straight rod portion to slide along the sliding direction, a pointing portion including a tip protruded along a second axis in a second direction, the second axis being at least substantially parallel to the first axis, and an extending portion having a first side attached to the sliding portion and a second side attached to the pointing portion. The apparatus further includes a fixed arm coupled to the straight rod portion and configured to mount a drill thereon to point the drill along the second axis toward the tip.

Abstract: An apparatus for verifying an osteotomy trajectory may include a straight rod portion extending along a first axis in a first direction, a sliding arm slidably coupled to the straight rod portion and configured to slide along a sliding direction on the straight rod portion along the first axis. The sliding arm may include a sliding portion slidably coupled to the straight rod portion to slide along the sliding direction, a pointing portion including a tip protruded along a second axis in a second direction, the second axis being at least substantially parallel to the first axis, and an extending portion having a first side attached to the sliding portion and a second side attached to the pointing portion. The apparatus further includes a fixed arm coupled to the straight rod portion and configured to mount a drill thereon to point the drill along the second axis toward the tip.

Abstract: A ZVS boost converter can include a boost inductor coupled to a DC voltage bus, a main switch configured to selectively store energy from the DC voltage bus in the boost inductor and deliver the stored energy to a load, a synchronous rectifier, and a resonant circuit coupled across the main switch. The resonant circuit can allow for zero voltage switching of the main switch and the synchronous rectifier switch. The resonant circuit can be a series resonant RC circuit. The boost converter can be operated in a continuous current mode, with the main switch operated at a constant frequency with a variable duty cycle to maintain output voltage regulation and the synchronous rectifier operated complementarily to the main switch. The duty cycle of the main switch can be controlled using a current window controller. The ZVS boost converter may be incorporated in a power factor corrected AC-DC converter.

Abstract: A ZVS boost converter can include a boost inductor coupled to a DC voltage bus, a main switch configured to selectively store energy from the DC voltage bus in the boost inductor and deliver the stored energy to a load, a synchronous rectifier, and a resonant circuit coupled across the main switch. The resonant circuit can allow for zero voltage switching of the main switch and the synchronous rectifier switch. The resonant circuit can be a series resonant RC circuit. The boost converter can be operated in a continuous current mode, with the main switch operated at a constant frequency with a variable duty cycle to maintain output voltage regulation and the synchronous rectifier operated complementarily to the main switch. The duty cycle of the main switch can be controlled using a current window controller. The ZVS boost converter may be incorporated in a power factor corrected AC-DC converter.