US3568086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oscillator system
Assignee: EG&G International Inc
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Filing: 1969-05-29
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Granted: 1971-03-02
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Expires: 1989-05-29
Abstract
Abstract An oscillator system embodying a zero-crossing detector and a ramp generator, the combination connected to provide either a frequency or a period measurement that varies substantially proportionally with the setting of a sensor or other attenuating device.
Inventors
- 👤 Kenneth E Perry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:15
CPC Classifications
H; H03; H03K; H03K4/00; H03K4/06; H03K3/00; H03K3/02; H03K3/023; H03K3/0231; H03K4/066
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
118 words
An oscillator system having, in combinatiOn: zero-crossing detector means having an input and an output interconnected by a positive feedback path; ramp generator means having an input and an output, the input connected to the output of the zero-crossing detector means and the output thereof connected, by means of a negative feedback path, to the input of the zero-crossing detector means; and signal attentuating terminal means connected across the output of the zero-crossing detector for selectively connecting the output thereof to the input of the ramp generator means and to the input of the zero-crossing detector means, whereby variations in the signal attenuating means causes the oscillator frequency and period respectively to vary substantially proportionately with such variations.
Claim 2
Dependent Claim
118 words
An oscillator system having, in combinatiOn: zero-crossing detector means having an input and an output interconnected by a positive feedback path; ramp generator means having an input and an output, the input connected to the output of the zero-crossing detector means and the output thereof connected, by means of a negative feedback path, to the input of the zero-crossing detector means; and signal attentuating terminal means connected across the output of the zero-crossing detector for selectively connecting the output thereof to the input of the ramp generator means and to the input of the zero-crossing detector means, whereby variations in the signal attenuating means causes the oscillator frequency and period respectively to vary substantially proportionately with such variations.
Claim 3
Dependent Claim
17 words
An oscillator system as claimed in claim 1 wherein the signal-attenuating means comprises an electrical sensor device.
Claim 4
Dependent Claim
27 words
The oscillator system as claimed in claim 2, further comprising a single frequency determining element connected from the output to the input of the ramp generator means.
Claim 5
Dependent Claim
19 words
The oscillator system as claimed in claim 3 wherein the single frequency determining element is an energy storage device.
Claim 6
Dependent Claim
61 words
An oscillator system as claimed in claim 4 wherein: the positive feedback path, the negative feedback path and the zero-crossing detector means output-to-ramp generator means input connection each contains a series connected reference, standard impedance; and the frequency and period of the oscillator being determined by the values of the reference impedances, energy storage device and signal attenuating means substantially exclusively.
Claim 7
Dependent Claim
52 words
The oscillator system as claimed in claim 5 further comprising: a unity gain amplifier means having an input and an output; the input thereof connected to the signal attenuating means; and the output thereof selectively connected between the input of the ramp generator means and the input to the zero-crossing detector means.
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) | 1974-03-01 | 1974-08-31 | 1975-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-01 | 1978-08-31 | 1979-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-01 | 1982-08-31 | 1983-03-02 | $7700.00 | Window Closed / Lapsed |