A low-cost gate for ultrasound pulse-echo studies.
Selective gating of ultrasounds echoes usually requires an expensive piece of electronics, a stepless gate. This note presents a simple circuit utilizing low-cost components which is easily built, and gives satisfactory performance as a gate for the study of individual ultrasound echoes. The gate has been measured to have a transmission loss of - 2 dB and an isolation of - 50dB.
D014465:Ultrasonics / Q000295:instrumentation*