Patent ID: 8864674

Claim:
A rotational intravascular ultrasound (IVUS) device, comprising: a flexible elongate member; a piezoelectric micromachined ultrasound transducer (PMUT) coupled to a distal portion of the flexible elongate member; an application-specific integrated circuit (ASIC) coupled to the distal portion of the flexible elongate member, wherein the ASIC is electrically coupled to the PMUT and wherein the ASIC includes: a pulser for driving the PMUT, an amplifier for receiving and amplifying signals representative of ultrasound echoes received by the PMUT, a protection circuit configured to protect the amplifier from high voltage transmit pulses from the pulser and allow the amplifier to receive the low amplitude echo signals from the PMUT, and timing and control circuitry for coordinating operation of the pulser, amplifier, and protection circuit; and a four-lead electrical cable, wherein a distal portion of the four-lead electrical cable is electrically coupled to the ASIC; wherein the four-lead electrical cable is arranged to include two pairs of balanced signal leads.