Patent US3980905A successfully refreshed from Google Patents.
US3980905A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for tuning a broad bandwidth transducer array
Assignee: United States Department of the Navy
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Filing: 1973-10-19
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Granted: 1976-09-14
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Expires: 1993-10-19
Abstract
Abstract A fixed electrical network, in conjunction with an amplifier having varia output impedance, is used to provide each of the transducer elements of an array with a reactance which acts as a large shunt reactance when the amplifier acts as a constant current source, but which acts as a smaller series reactance when the amplifier acts as a constant voltage source. Consequently, the usable bandwidth of the array is greatly increased, without degrading its performance.
Inventors
- 👤 Harry B. Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 00:27
CPC Classifications
B; B06; B06B; B06B1/00; B06B1/02; B06B1/0207; B06B1/0223
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
148 words
A tuning and driving apparatus comprising: a piezoelectric electroacoustic transducer element having a first terminal and a second terminal; a passive half-Tee network including a first inductor having a first terminal and a second terminal and a second inductor having a first terminal and a second terminal, with the second terminal of said first inductor being connected to the first terminal of said second inductor and to the first terminal of said transducer element, and the second terminal of said second inductor being connected to the second terminal of said transducer element; and an amplifier having frequency dependent variable output impedance and having a first output terminal and a second output terminal, with the first output terminal of said amplifier being connected to the first terminal of said first inductor and the second output terminal of said amplifier being connected to the second terminal of said second inductor.
Claim 2
Dependent Claim
148 words
A tuning and driving apparatus comprising: a piezoelectric electroacoustic transducer element having a first terminal and a second terminal; a passive half-Tee network including a first inductor having a first terminal and a second terminal and a second inductor having a first terminal and a second terminal, with the second terminal of said first inductor being connected to the first terminal of said second inductor and to the first terminal of said transducer element, and the second terminal of said second inductor being connected to the second terminal of said transducer element; and an amplifier having frequency dependent variable output impedance and having a first output terminal and a second output terminal, with the first output terminal of said amplifier being connected to the first terminal of said first inductor and the second output terminal of said amplifier being connected to the second terminal of said second inductor.
Claim 3
Dependent Claim
164 words
A tuning and driving apparatus comprising: a piezoelectric electroacoustic transducer element having a first terminal and a second terminal; a passive half-Pi network including a first inductor having a first terminal and a second terminal and a second inductor having a first terminal and a second terminal, with the first terminal of said first inductor being connected to the first terminal of said second inductor forming a junction point, the second terminal of said first inductor being connected to the second terminal of said transducer element and the second terminal of said second inductor being connected to the first terminal of said transducer element; and a frequency dependent variable output impedance amplifier having a first output terminal and a second output terminal, with the first output terminal of said amplifier being connected to the junction point of the first terminals of said first and second inductors, and the second output terminal of said amplifier being connected to the second terminal of said first inductor.
Claim 4
Dependent Claim
164 words
A tuning and driving apparatus comprising: a piezoelectric electroacoustic transducer element having a first terminal and a second terminal; a passive half-Pi network including a first inductor having a first terminal and a second terminal and a second inductor having a first terminal and a second terminal, with the first terminal of said first inductor being connected to the first terminal of said second inductor forming a junction point, the second terminal of said first inductor being connected to the second terminal of said transducer element and the second terminal of said second inductor being connected to the first terminal of said transducer element; and a frequency dependent variable output impedance amplifier having a first output terminal and a second output terminal, with the first output terminal of said amplifier being connected to the junction point of the first terminals of said first and second inductors, and the second output terminal of said amplifier being connected to the second terminal of said first inductor.
Claim 5
Dependent Claim
146 words
A tuning and driving apparatus comprising: a magnetostrictive electroacoustic transducer element having a first terminal and a second terminal; a passive half-Tee network including a first capacitor having a first terminal and a second terminal and a second capacitor having a first terminal and a second terminal, with the second terminal of said first capacitor being connected to the first terminal of said second capacitor and to the first terminal of said transducer element, and the second terminal of said second capacitor being connected to the second terminal of said transducer element; and a frequency dependent variable output impedance amplifier having a first output terminal and a second output terminal, with the first output terminal of said amplifier being connected to the first terminal of said first capacitor and the second output terminal of said amplifier being connected to the second terminal of said second capacitor.
Claim 6
Dependent Claim
146 words
A tuning and driving apparatus comprising: a magnetostrictive electroacoustic transducer element having a first terminal and a second terminal; a passive half-Tee network including a first capacitor having a first terminal and a second terminal and a second capacitor having a first terminal and a second terminal, with the second terminal of said first capacitor being connected to the first terminal of said second capacitor and to the first terminal of said transducer element, and the second terminal of said second capacitor being connected to the second terminal of said transducer element; and a frequency dependent variable output impedance amplifier having a first output terminal and a second output terminal, with the first output terminal of said amplifier being connected to the first terminal of said first capacitor and the second output terminal of said amplifier being connected to the second terminal of said second capacitor.
Claim 7
Dependent Claim
165 words
A tuning and driving apparatus comprising: a magnetostrictive electroacoustic transducer element having a first terminal and a second terminal; a passive half-Pi network including a first capacitor having a first terminal and a second terminal and a second capacitor having a first terminal and a second terminal, with the first terminal of said first capacitor being connected to the first terminal of said second capacitor forming a junction point, the second terminal of said first capacitor being connected to the second terminal of said transducer element and the second terminal of said second capacitor being connected to the first terminal of said transducer element; and an amplifier having frequency dependent variable output impedance having a first output terminal and a second output terminal, with the first output terminal of said amplifier being connected to the junction point of the first terminals of said first and second capacitors, and the second output terminal of said amplifier being connected to the second terminal of said first capacitor.
Claim 8
Dependent Claim
165 words
A tuning and driving apparatus comprising: a magnetostrictive electroacoustic transducer element having a first terminal and a second terminal; a passive half-Pi network including a first capacitor having a first terminal and a second terminal and a second capacitor having a first terminal and a second terminal, with the first terminal of said first capacitor being connected to the first terminal of said second capacitor forming a junction point, the second terminal of said first capacitor being connected to the second terminal of said transducer element and the second terminal of said second capacitor being connected to the first terminal of said transducer element; and an amplifier having frequency dependent variable output impedance having a first output terminal and a second output terminal, with the first output terminal of said amplifier being connected to the junction point of the first terminals of said first and second capacitors, and the second output terminal of said amplifier being connected to the second terminal of said first capacitor.
Claim 9
Dependent Claim
148 words
A tuning and receiving apparatus comprising: a piezoelectric electroacoustic transducer element having a first terminal and a second terminal; a passive half-Tee network including a first inductor having a first terminal and a second terminal and a second inductor having a first terminal and a second terminal, with the second terminal of said first inductor being connected to the first terminal of said second inductor and to the first terminal of said transducer element, and the second terminal of said second inductor being connected to the second terminal of said transducer element; and an amplifier having frequency dependent variable input impedance and having a first input terminal and a second input terminal, with the first input terminal of said amplifier being connected to the first terminal of said first inductor and the second input terminal of said amplifier being connected to the second terminal of said second inductor.
Claim 10
Dependent Claim
148 words
A tuning and receiving apparatus comprising: a piezoelectric electroacoustic transducer element having a first terminal and a second terminal; a passive half-Tee network including a first inductor having a first terminal and a second terminal and a second inductor having a first terminal and a second terminal, with the second terminal of said first inductor being connected to the first terminal of said second inductor and to the first terminal of said transducer element, and the second terminal of said second inductor being connected to the second terminal of said transducer element; and an amplifier having frequency dependent variable input impedance and having a first input terminal and a second input terminal, with the first input terminal of said amplifier being connected to the first terminal of said first inductor and the second input terminal of said amplifier being connected to the second terminal of said second inductor.
Claim 11
Dependent Claim
164 words
A tuning and receiving apparatus comprising: a piezoelectric electroacoustic transducer element having a first terminal and a second terminal; a passive half-Pi network including a first inductor having a first terminal and a second terminal and a second inductor having a first terminal and a second terminal, with the first terminal of said first inductor being connected to the first terminal of said second inductor forming a junction point, the second terminal of said first inductor being connected to the second terminal of said transducer element and the second terminal of said second inductor being connected to the first terminal of said transducer element; and a frequency dependent variable input impedance amplifier having a first input terminal and a second input terminal, with the first input terminal of said amplifier being connected to the junction point of the first terminals of said first and second inductors, and the second input terminal of said amplifier being connected to the second terminal of said first inductor.
Claim 12
Dependent Claim
164 words
A tuning and receiving apparatus comprising: a piezoelectric electroacoustic transducer element having a first terminal and a second terminal; a passive half-Pi network including a first inductor having a first terminal and a second terminal and a second inductor having a first terminal and a second terminal, with the first terminal of said first inductor being connected to the first terminal of said second inductor forming a junction point, the second terminal of said first inductor being connected to the second terminal of said transducer element and the second terminal of said second inductor being connected to the first terminal of said transducer element; and a frequency dependent variable input impedance amplifier having a first input terminal and a second input terminal, with the first input terminal of said amplifier being connected to the junction point of the first terminals of said first and second inductors, and the second input terminal of said amplifier being connected to the second terminal of said first inductor.
Claim 13
Dependent Claim
146 words
A tuning and receiving apparatus comprising: a magnetostrictive electroacoustic transducer element having a first terminal and a second terminal; a passive half-Tee network including a first capacitor having a first terminal and a second terminal and a second capacitor having a first terminal and a second terminal, with the second terminal of said first capacitor being connected to the first terminal of said second capacitor and to the first terminal of said transducer element, and the second terminal of said second capacitor being connected to the second terminal of said transducer element; and a frequency dependent variable input impedance amplifier having a first input terminal and a second input terminal, with the first input terminal of said amplifier being connected to the first terminal of said first capacitor and the second input terminal of said amplifier being connected to the second terminal of said second capacitor.
Claim 14
Dependent Claim
146 words
A tuning and receiving apparatus comprising: a magnetostrictive electroacoustic transducer element having a first terminal and a second terminal; a passive half-Tee network including a first capacitor having a first terminal and a second terminal and a second capacitor having a first terminal and a second terminal, with the second terminal of said first capacitor being connected to the first terminal of said second capacitor and to the first terminal of said transducer element, and the second terminal of said second capacitor being connected to the second terminal of said transducer element; and a frequency dependent variable input impedance amplifier having a first input terminal and a second input terminal, with the first input terminal of said amplifier being connected to the first terminal of said first capacitor and the second input terminal of said amplifier being connected to the second terminal of said second capacitor.
Claim 15
Dependent Claim
165 words
A tuning and receiving apparatus comprising: a magnetostrictive electroacoustic transducer element having a first terminal and a second terminal; a passive half-Pi network including a first capacitor having a first terminal and a second terminal and a second capacitor having a first terminal and a second terminal, with the first terminal of said first capacitor being connected to the first terminal of said second capacitor forming a junction point, the second terminal of said first capacitor being connected to the second terminal of said transducer element and the second terminal of said second capacitor being connected to the first terminal of said transducer element; and an amplifier having frequency dependent variable input impedance having a first output terminal and a second input terminal, with the first input terminal of said amplifier being connected to the junction point of the first terminals of said first and second capacitors, and the second input terminal of said amplifier being connected to the second terminal of said first capacitor.
Claim 16
Dependent Claim
165 words
A tuning and receiving apparatus comprising: a magnetostrictive electroacoustic transducer element having a first terminal and a second terminal; a passive half-Pi network including a first capacitor having a first terminal and a second terminal and a second capacitor having a first terminal and a second terminal, with the first terminal of said first capacitor being connected to the first terminal of said second capacitor forming a junction point, the second terminal of said first capacitor being connected to the second terminal of said transducer element and the second terminal of said second capacitor being connected to the first terminal of said transducer element; and an amplifier having frequency dependent variable input impedance having a first output terminal and a second input terminal, with the first input terminal of said amplifier being connected to the junction point of the first terminals of said first and second capacitors, and the second input terminal of said amplifier being connected to the second terminal of said first capacitor.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-14 | 1980-03-15 | 1980-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-14 | 1984-03-15 | 1984-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-14 | 1988-03-15 | 1988-09-14 | $7700.00 | Window Closed / Lapsed |