System and method for automatic filter tuning

A sealed proximity coupling device comprising:

• a receiver sealed in the sealed proximity coupling device;
• a filter, sealed in the sealed proximity coupling device, that filters an input signal for the receiver;
• an input for a first external control signal from an external control circuit outside the sealed proximity coupling device to set a trim code on the sealed proximity coupling device via a performance metric feedback path;
• a first trimming circuit, sealed in the sealed proximity coupling device, that trims a center frequency of the filter, wherein the first trimming circuit is controlled by the trim code;
• a second trimming circuit, sealed in the sealed proximity coupling device, that trims an input signal magnitude for the filter;
• and
• a nonvolatile memory, sealed in the sealed proximity coupling device, that stores the trim code.

A system comprising:

• a filter in a sealed proximity coupling device;
• a first trimming circuit for the filter configured to trim a center frequency of the filter;
• a test device with:
• (i) a holder for a transmitting device;
• and (ii) a motor to transfer the holder from a first physical test condition to a second physical test condition;
• a first control system with a performance metric feedback path which includes an external control circuit outside the sealed proximity coupling device, wherein the first control system is in operative communication with the first trimming circuit, and wherein the first control system provides a trim code to the sealed proximity coupling device;
• a second trimming circuit configured to trim an input signal magnitude of the filter;
• a nonvolatile memory in the sealed proximity coupling device to store the trim code;
• and
• a second control system in operative communication with the motor and the first control system.