Patent ID: 9385790
Filing Date: 2016-07-05
CPC Classification: H04B,H04L

Claim Text:
1. A method of resonant inductive coupled communications, the method comprising: driving a first resonant tank (first tank) for generating induced oscillations with a modulated carrier signal, said first tank tuned to a first resonant frequency and including first antenna coils, so that said first antenna coils transmit a predetermined number of carrier frequency cycles (predetermined number of cycles) for providing data that is first transition coded; said first tank further including: a first capacitor coupled in parallel to said first antenna coils; a first resistor coupled in series between said first antenna coils; and a first switch coupled in series between said first antenna coils; after said predetermined number of cycles, activating said first switch for widening a bandwidth and changing a Q factor of said first tank; responsive to said oscillations in said first tank, beginning induced oscillations in a second resonant tank (second tank), said second tank tuned to a second resonant frequency that is essentially equal said first resonant frequency and including: a second antenna coil that is separated from said first antenna coils by a distance that provides near-field communications; a second capacitor coupled in parallel to said second antenna coil; and a second switch coupled in parallel to said second antenna coil; and responsive to detecting a bit associated with said induced oscillations of said second tank, activating said second switch for widening a bandwidth and changing a Q factor of said second tank, and resetting a receiver sense circuit coupled to receive an output of said second tank.