US3596193A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sweep oscillator with intensity frequency marker
Assignee: Anritsu Co
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Filing: 1968-03-27
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Granted: 1971-07-27
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Expires: 1988-03-27
Abstract
Abstract A sweep oscillator for use in conjunction with a cathode-ray oscilloscope provides an oscilloscope trace of a frequency response characteristic of a network under test. An intensified marker portion for identifying the frequency of a particular point on the trace is provided by slowing the electron beam at that point by modifying the sweep rate of the oscillator. A comparator compares the sweep voltage to a preset DC voltage and operates on the sweep voltage to reduce its rate or slope at the marker spot desired. The voltage output of the comparator is shaped to cause the length of the marker on the trace to remain at a constant percentage of the total sweep time.
Inventors
- 👤 Duane Edmond Dunwoodie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:55
CPC Classifications
H; H03; H03B; H03B23/00; G; G01; G01R; G01R13/00; G01R13/20; G01R13/22; G01R13/30; G01R13/32; H03B2200/00; H03B2200/006; H03B2200/0092
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
79 words
A sweep oscillator having a predetermined signal frequency range comprising: voltage controlled oscillator means; means for sweeping said oscillator means through said predetermined frequency range, said sweeping means producing a substantially linear sweep voltage; means coupled to said sweep means for slowing said sweep of said oscillator means including comparator means responsive to a reference voltage of predetermined magnitude and said linear sweep voltage equaling said reference voltage magnitude for slowing said sweep for a portion of said range.
Claim 2
Dependent Claim
79 words
A sweep oscillator having a predetermined signal frequency range comprising: voltage controlled oscillator means; means for sweeping said oscillator means through said predetermined frequency range, said sweeping means producing a substantially linear sweep voltage; means coupled to said sweep means for slowing said sweep of said oscillator means including comparator means responsive to a reference voltage of predetermined magnitude and said linear sweep voltage equaling said reference voltage magnitude for slowing said sweep for a portion of said range.
Claim 3
Dependent Claim
39 words
A sweep oscillator as in claim 1 in which said sweep slowing means is responsive to the rate of said sweep voltage for maintaining a constant ratio between the time duration of said portion and the total sweep time.
Claim 4
Dependent Claim
15 words
A sweep oscillator as in claim 2 in which said ratio is one to 20,
Claim 5
Dependent Claim
82 words
A sweep oscillator having a predetermined signal frequency range comprising: voltage controlled oscillator means; means for sweeping said oscillator means through said predetermined frequency range; means coupled to said sweeping means for slowing said sweep of said oscillator means including mixer means responsive to a reference signal source of predetermined frequency and the output signal of said voltage controlled oscillator means for slowing said sweep of a portion of said range when said frequency of said output signal equals said predetermined frequency.
Claim 6
Dependent Claim
82 words
A sweep oscillator having a predetermined signal frequency range comprising: voltage controlled oscillator means; means for sweeping said oscillator means through said predetermined frequency range; means coupled to said sweeping means for slowing said sweep of said oscillator means including mixer means responsive to a reference signal source of predetermined frequency and the output signal of said voltage controlled oscillator means for slowing said sweep of a portion of said range when said frequency of said output signal equals said predetermined frequency.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |