FLOW SPEED DETECTION CIRCUIT AND ASSOCIATED CHIP AND FLOW METER

The present application discloses a flow speed detection circuit and a related chip and flow meter. Said flow speed detection circuit is coupled to a first transducer and a second transducer that are external to the flow speed detection circuit, wherein the flow speed detection circuit includes: a transmitter, configured to provide a front signal and a main signal to the first transducer, wherein the first transducer transforms the front signal and the main signal into a transduced signal to the second transducer, the second transducer transforms the transduced signal into a receiving front signal and a receiving main signal to a receiver; and the receiver includes: a front signal detection circuit, configured to enable the main signal processing circuit after the receiving front signal; and the main signal processing circuit, configured to determine the flow speed based on the receiving main signal after being enabled.