A self-test circuit and method for checking the integrity of a signal through a signal path

摘要

Examples provide a self-test circuit. The self-test circuit includes input circuitry; Test circuitry; and a circuit under test coupled between the input and test circuitry and including at least one piezoelectric crystal. The input circuitry is configured to transmit a predefined electrical signal having at least one sinusoidal signal through at least the piezoelectric crystal of the circuit under test to produce an output signal. The test circuitry is configured to analyze the output signal.