Patent ID: 11885874
Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 2:
3. The acoustic distance measuring circuit of claim 1, wherein the sensing circuit comprises:
an in-phase and quadrature (I/Q) digital mixer having a first input coupled to the output of the acoustic transducer, a second input for receiving a mixing signal, and an output for providing an in-phase portion of the chirp signal and a quadrature portion of the chirp signal; and
a digital filter having an input coupled to the output of the I/Q digital mixer, an input for receiving finite impulse response (FIR) filter coefficients, a first output for providing the filtered in-phase portion of the input signal, and a second output for providing the filtered quadrature portion of the input signal.