Driving frequency controlling method for an ultrasonic transducer driving apparatus
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Dec 31, 1985
Grant Date -
N/A
app pub date -
Jun 13, 1983
filing date -
Jul 21, 1982
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for flating the phase characteristic of a differential detection signal in one higher and lower regions thereof relative to its resonance frequency by controlling a differential characteristic. A searching, over a range, which is wider than the width of the flat region, is accomplished prior to phase characteristic being effected thereby discriminating a fundamental resonance frequency. After this discrimination of the fundamental resonance frequency, automatic tracking is effected under stable corrected phase characteristics for the fundamental resonant frequency whereby high electro-mechanical conversion efficiency can be maintained.
First Claim
Other Claims data not available
Family
| Country | kind | publication No. | Filing Date |
|---|---|---|---|
| JP | A | JPS5916572 | Jul 21, 1982 |
| DE | C2 | DE3321531 | Jun 15, 1983 |
| GB | B | GB2124442 | Jun 15, 1983 |
International Classification(s)
- 1983 Application Filing Year
- H03B Class
- 80 Applications Filed
- 1 Patents Issued To-Date
- 1.25 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 53 Citation Count
- H03B Class
- 0 % this patent is cited more than
- 40 Age