公开(公告)号：US3445750A

公开(公告)日：1969-05-20

申请号：US3445750D

申请日：1966-10-17

Applicant: UTHE TECHNOLOGY

Inventor： UTHE PAUL M JR ,  WRIGHT LOREN G ,  GREENAN RICHARD E

IPC: B06B1/02 ,  H03F1/34 ,  G05F1/44

CPC classification number: H03F1/34 ,  B06B1/0253 ,  Y10T307/461

公开(公告)号：US3636456A

公开(公告)日：1972-01-18

申请号：US3636456D

申请日：1969-12-29

Applicant: UTHE TECHNOLOGY

Inventor： WRIGHT LOREN G

IPC: B06B1/02 ,  H03K5/08 ,  G01R27/00

CPC classification number: B06B1/0253 ,  B06B2201/72

Abstract: A circuit is connected to an ultrasonic transducer being fed by a constant current or constant voltage power supply. By rectifying, differentiating, and amplifying the transducer coil voltage an output signal that is a function of the transducer and load impedance is provided that can be displayed so as to determine the operating condition of the ultrasonic apparatus.