MUT circuit with an electrically controllable membrane

摘要

A micromachined ultrasonic transducer (MUT) circuit, which has a MUT with a MUT membrane that can vibrate back and forth to transmit an ultrasonic wave, electrically controls the movement of the MUT membrane by controllably transferring energy to the MUT membrane, thereby allowing the MUT membrane to transmit substantially any desired ultrasonic wave.

主权项

1. A micromachined ultrasonic transducer (MUT) circuit comprising:
a membrane; and a transmit circuit connected to the membrane, the transmit circuit configured to output a transmit signal to the membrane to transfer energy to the membrane, the transmit signal having an initial waveform that transfers an initial amount of energy that causes the membrane to first move in a first direction to a first position, and then move in a second direction opposite the first direction from the first position to a second position, the transmit signal having, after the initial waveform, an additional waveform that transfers an additional amount of energy to the membrane, the initial and additional amounts of energy being different, and the transmit signal having, after the additional waveform, a cancellation waveform that transfers a cancellation amount of energy to the membrane, wherein said initial waveform and said additional waveform and said cancellation waveform are voltage waveforms that each begins at a common reference voltage level, and then moves from said common reference voltage level to a another voltage level, and then returns to end at said common reference voltage level.