NFC Device Combining Components of Antenna Driver and Shunt Regulator

摘要

Embodiments of the present disclosure can be used to produce smaller, more compact antenna drivers at a reduced cost. Systems and methods for integrating components of an antenna driver with components of a shunt regulator and clamp are provided. By combining these components according to embodiments of the present disclosure, transistor count in an antenna driver can be reduced. This integrated device advantageously allows antenna driver functionality, regulator functionality, and clamp control functionality to be provided at a reduced manufacturing cost and with reduced real estate.

主权项

1. A method for configuring a circuit to a state for creating a magnetic field, the method comprising:
determining that the circuit is to be transitioned from a state for receiving the magnetic field to the state for creating the magnetic field, wherein, in the state for receiving the magnetic field, a first switch, a second switch, and a third switch are open while a fourth switch and a fifth switch are closed; closing the first switch to couple a predriver to a first transistor; closing the second switch to couple the predriver to a second transistor; closing the third switch to couple the predriver to a third transistor; opening the fourth switch to decouple a voltage regulator from the second transistor; and opening the fifth switch to decouple a clamp control from the third transistor.