US4156823A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for damping an ultrasonic transducer
Assignee: Individual
•
Filing: 1978-02-27
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Granted: 1979-05-29
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Expires: 1998-02-27
Abstract
Abstract In an ultrasonic wave generator or receiver using an ultrasonic wave transducer, a negative immittance converter is inserted in a circuit of the generator or receiver in order to cancel components which impede the damping characteristics of the ultrasonic transducer.
Inventors
- 👤 Hideyuki Suzuki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:13
CPC Classifications
G; G10; G10K; G10K11/00; G10K11/002; B; B06; B06B; B06B1/00; B06B1/02; B06B1/0207; B06B1/0215; H; H03; H03H; H03H11/00; H03H11/02; H03H11/40; H03H11/44; H10; H10N; H10N30/00; H10N30/80; H10N30/802; B06B2201/00; B06B2201/30
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
91 words
In an ultrasonic wave transmitter comprising a signal generator, an amplifier for amplifying the output of the signal generator, and an ultrasonic transducer driven by the amplifier; a method for damping the ultrasonic transducer by inserting a negative immittance converter between the amplifier and the ultrasonic transducer so as to generate a negative immittance to cancel components which impede the damping characteristics of the ultrasonic transducer including the output impedance of the amplifier, the damping impedance of the ultrasonic transducer and the connecting impedance between the amplifier and the ultrasonic transducer.
Claim 2
Dependent Claim
91 words
In an ultrasonic wave transmitter comprising a signal generator, an amplifier for amplifying the output of the signal generator, and an ultrasonic transducer driven by the amplifier; a method for damping the ultrasonic transducer by inserting a negative immittance converter between the amplifier and the ultrasonic transducer so as to generate a negative immittance to cancel components which impede the damping characteristics of the ultrasonic transducer including the output impedance of the amplifier, the damping impedance of the ultrasonic transducer and the connecting impedance between the amplifier and the ultrasonic transducer.
Claim 3
Dependent Claim
30 words
A method for damping an ultrasonic transducer in an ultrasonic wave transmitter according to claim 1, wherein the negative immittance converter is of an open circuit stable negative immittance converter.
Claim 4
Dependent Claim
86 words
In an ultrasonic wave receiver comprising an ultrasonic transducer and a pre-signal amplifier amplifying the output of the ultrasonic transducer; a method for damping the ultrasonic transducer by inserting a negative immittance converter between the ultrasonic transducer and the amplifier so as to generate a negative immittance to cancel components which impede the damping characteristics of the ultrasonic transducer including the damping impedance of the ultrasonic transducer, the input impedance of the pre-signal amplifier and the connecting impedance between the pre-signal amplifier and the ultrasonic transducer.
Claim 5
Dependent Claim
86 words
In an ultrasonic wave receiver comprising an ultrasonic transducer and a pre-signal amplifier amplifying the output of the ultrasonic transducer; a method for damping the ultrasonic transducer by inserting a negative immittance converter between the ultrasonic transducer and the amplifier so as to generate a negative immittance to cancel components which impede the damping characteristics of the ultrasonic transducer including the damping impedance of the ultrasonic transducer, the input impedance of the pre-signal amplifier and the connecting impedance between the pre-signal amplifier and the ultrasonic transducer.
Claim 6
Dependent Claim
30 words
A method for damping an ultrasonic transducer in an ultrasonic wave receiver according to claim 3, wherein the negative immittance converter is of a short circuit stable negative immittance converter.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-05-28 | 1982-11-27 | 1983-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-05-28 | 1986-11-27 | 1987-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-05-28 | 1990-11-27 | 1991-05-29 | $7700.00 | Window Closed / Lapsed |