Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Upper trace: Schematic of the external-to-head-unit in an exploded view, displaying the IR photoreceiver and RF inductive power coils, respectively. Lower trace: a photograph of the PCB layout of the unit, where the primary RF coil and the photodiode are “co-centric,” together with the latter’s preamplifier circuit [59].
