Patent ID: 11899106
Assignee: SEMICONDUCTOR COMPONENTS INDUSTRIES, LLC
Field: Measurement (Instruments)
Classification: CPC G  B | IPC B  G

Claim 0:
1. An acoustic distance measuring circuit, comprising:
a transmitter having an output adapted to be coupled to an acoustic transducer for providing a selected one of an amplitude-modulation (AM) signal in an AM mode and a chirp signal in a chirp mode;
a receiver having an input adapted to be coupled to said acoustic transducer, and an output for providing a digital received signal; and
a controller operative during a first measurement period to:
place said transmitter into one of said AM mode and said chirp mode using a first channel, selectively detect a first direct echo in said first channel of said digital received signal of said one of said AM signal and said chirp signal, and selectively detect a first indirect echo in a second channel of said digital received signal of another one of said AM signal and said chirp signal.