Patent ID: 11913988
Assignee: QUALCOMM TECHNOLOGIES, INC.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 14:
15. An apparatus for testing a transducer module having a plurality of transducers, the plurality of transducers having a common-mode terminal, each transducer configured to independently produce corresponding output signal relative to the common-mode terminal in response to a common stimulus, the apparatus comprising:
a test signal generator configured to generate an alternating test signal having a test signal amplitude, the test signal generator having a test signal output terminal configured to provide the test signal from the test signal generator to the common-mode terminal of the transducer module;
a signal processing circuit configured to process transducer output signals from the transducer module, the signal processing circuit having an interface comprising:
a first signal processing input terminal configured to receive a first transducer output;
a second signal processing input terminal configured to receive a second transducer output;
a signal processing circuit output configured to produce a system output signal based on the first transducer output and the second transducer output;
a controller configured to controllably couple the test signal to the common-mode terminal of the transducer module in a test mode; and
an output comparator coupled to receive the system output signal and configured to produce, in the test mode, a comparator output signal indicating that the system output signal indicates a mismatch between the first transducer output and the second transducer output.