Patent ID: 7983855

Claim:
Meter electronics ( 20 ) for generating a drive signal for a vibratory flowmeter ( 5 ), comprising: an interface ( 201 ) for receiving a sensor signal ( 210 ) from the vibratory flowmeter ( 5 ); and a processing system ( 203 ) in communication with the interface ( 201 ) and configured to receive the sensor signal ( 210 ), phase-shift the sensor signal ( 210 ) substantially 90 degrees to create a phase-shifted sensor signal, determine a phase shift value (θ) from a frequency response of the vibratory flowmeter ( 5 ), combine the phase shift value (θ) with the sensor signal ( 210 ) and the phase-shifted sensor signal in order to generate a drive signal phase ( 213 ), determine a sensor signal amplitude ( 214 ) from the sensor signal ( 210 ) and the phase-shifted sensor signal, and generate a drive signal amplitude ( 215 ) based on the sensor signal amplitude ( 214 ), wherein the drive signal phase ( 213 ) is substantially identical to a sensor signal phase ( 212 ).