Protection circuits for ultrasound applications.
A simple input protection circuit for ultrasound pulse-echo applications is described. Its performance is analyzed with regard to other widely used arrangements. Besides the primary function of showing high impedance during the transducer excitation time and a low impedance path to the amplifier in reception, issues of harmonic distortion, insertion losses, bandwidth, power dissipation, transient response, and noise are addressed. It is shown that the proposed circuit has many advantages, operating without any control signals or bias voltages. It is small and can be considered a good general-purpose protection circuit alternative.
J
J
Camacho
C
C
Fritsch
D000669:Amplifiers, Electronic; D017076:Computer-Aided Design; D004581:Electronics / Q000295:instrumentation*; D004867:Equipment Design; D004868:Equipment Failure; D019544:Equipment Failure Analysis / Q000295:instrumentation* / Q000379:methods; D014463:Ultrasonography / Q000295:instrumentation*