Input circuit in ultrasonic apparatus

Details Input circuit in ultrasonic apparatus Input circuit in ultrasonic apparatus

1986-02-10

1987-07-14

Budd, Mark O.

Electrical generator or motor structure

Non-dynamoelectric

Piezoelectric elements and devices

H01L 4108

Patent

active

046804986

ABSTRACT:
An input circuit in which an input impedance of a reception amplifier connected to a piezoelectric transducer is selected to be lower than an impedance composed of an inter-electrode capacitance of the piezoelectric transducer, an equivalent capacitance of a cable used to connect the piezoelectric transducer to the reception amplifier, etc., that is, the parallel impedance of those elements connected in parallel to the reception amplifier so that the reception amplifier is used as an amplifier of the current detection type.

REFERENCES:
patent: Re28596 (1975-10-01), Siegel
patent: 3389276 (1968-06-01), Gradin et al.
patent: 3390286 (1968-06-01), Gradin et al.
patent: 3400284 (1968-09-01), Elazar
patent: 3903733 (1975-09-01), Murayama et al.
patent: 3980905 (1976-09-01), Miller
patent: 3984704 (1976-10-01), Lakestani
patent: 4156157 (1979-05-01), Mabille
patent: 4156823 (1979-05-01), Suzuki

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