Patent ID: 7822390
Filing Date: 2010-10-26
Classification: H04B,H04R

Abstract:
1. An inductive antenna circuit, comprising: a first set of terminals; a second set of terminals; a driving unit connected to said first set of terminals and configured to drive said inductive antenna circuit during a transmit mode; an amplifier connected to said second set of terminals and configured to detect and amplify an incoming differential signal during a receiving mode; a first tuning capacitor connected in series to a first terminal of a first inductor wound around a core, the first tuning capacitor further connected to one terminal of the first set of terminals; a second tuning capacitor connected in series to a second terminal of the first inductor, the second tuning capacitor further connected to another terminal of the first set of terminals; a third tuning capacitor connected in series to a first terminal of a second inductor wound around said core, the third tuning capacitor further connected to one terminal of the second set of terminals; and a fourth tuning capacitor connected in series to a second terminal of the second inductor, the fourth tuning capacitor further connected to another terminal of the second set of terminals.