US4291343A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency-ratio apparatus
Assignee: Individual
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Filing: 1979-03-05
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Granted: 1981-09-22
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Expires: 1999-03-05
Abstract
Abstract An apparatus for producing a signal which varies as the ratio of the frequency of a first stream to a second stream. In a preferred embodiment of the apparatus, the first stream is transformed into a first signal of value proportional to the frequency of the first stream, and the second stream is transformed into a second signal that has a value proportional to the product of the second stream frequency times a feedback value. The feedback value is derived from a combination of the first and second signals.
Inventors
- 👤 Herbert S. Riddle, Jr.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:30
CPC Classifications
G; G11; G11B; G11B23/00; G11B23/0007; G11B20/00; G11B20/02; G11B20/06; G11B20/22
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
155 words
Apparatus for producing a signal which varies as the ratio of the frequency of a first, frequency stream to the frequency of a second, frequency stream, the apparatus comprising: (a) a first-stream frequency-discriminating means which transforms said first, frequency stream into a third signal of value proportional to the frequency of said first stream, (b) a second-stream frequency-discriminating means which multiplies said second, frequency stream by a feedback value to form a fourth signal of value proportional to the product of said second-stream frequency times said feedback value, (c) a combining means which combines the third and fourth signals and generates an output value proportional to the feedback value, and (d) a feedback loop which returns said feedback value to the second-stream frequency-discriminating means, whereby the feedback loop in said apparatus causes the output value to vary in a manner which is proportional to the ratio of the first-stream frequency divided by the second-stream frequency.
Claim 2
Dependent Claim
155 words
Apparatus for producing a signal which varies as the ratio of the frequency of a first, frequency stream to the frequency of a second, frequency stream, the apparatus comprising: (a) a first-stream frequency-discriminating means which transforms said first, frequency stream into a third signal of value proportional to the frequency of said first stream, (b) a second-stream frequency-discriminating means which multiplies said second, frequency stream by a feedback value to form a fourth signal of value proportional to the product of said second-stream frequency times said feedback value, (c) a combining means which combines the third and fourth signals and generates an output value proportional to the feedback value, and (d) a feedback loop which returns said feedback value to the second-stream frequency-discriminating means, whereby the feedback loop in said apparatus causes the output value to vary in a manner which is proportional to the ratio of the first-stream frequency divided by the second-stream frequency.
Claim 3
Dependent Claim
167 words
Apparatus for producing a signal which varies as the ratio of the frequency of a first stream to a second stream, the apparatus comprising: (a) a first stream frequency-discriminating means which transforms the first stream into a first signal of value proportional to the frequency of the first stream; (b) a second stream frequency-discriminating means which effectively performs both frequency discrimination and multiplication, and which essentially multiplies the incompletely demodulated second stream by a feedback value to form a second signal of value proportional to the product of the second stream frequency times the feedback value; (c) a combining means which combines the first and second signals and generates an output value proportional to the feedback value; and (d) a feedback loop which returns the feedback value to the second stream frequency-discriminating means, so that the feedback loop in the apparatus causes the output value to vary in a manner which is proportional to the ratio of the first stream frequency divided by the second stream frequency.
Claim 4
Dependent Claim
167 words
Apparatus for producing a signal which varies as the ratio of the frequency of a first stream to a second stream, the apparatus comprising: (a) a first stream frequency-discriminating means which transforms the first stream into a first signal of value proportional to the frequency of the first stream; (b) a second stream frequency-discriminating means which effectively performs both frequency discrimination and multiplication, and which essentially multiplies the incompletely demodulated second stream by a feedback value to form a second signal of value proportional to the product of the second stream frequency times the feedback value; (c) a combining means which combines the first and second signals and generates an output value proportional to the feedback value; and (d) a feedback loop which returns the feedback value to the second stream frequency-discriminating means, so that the feedback loop in the apparatus causes the output value to vary in a manner which is proportional to the ratio of the first stream frequency divided by the second stream frequency.
Claim 5
Dependent Claim
58 words
The apparatus of claim 2, wherein, in the second stream frequency-discriminating means, the discrimination is accomplished by switching an input signal to the reference stream frequency discriminating means at a rate proportional to reference stream frequency, and the multiplication is accomplished by varying the amplitude of the input signal in accordance with the amplitude of the feedback value.
Claim 6
Independent Claim
144 words
A method of producing a signal which varies as the ratio of the frequency of a first stream to a second stream, the method comprising: (a) accomplishing frequency-discrimination of the first stream, by transforming the first stream into a first signal of value proportional to the frequency of the first stream; (b) accomplishing frequency-discrimination and multiplication of the second stream, by transforming the second stream into a second signal of value proportional to the product of the second stream frequency times a feedback value; (c) combining the first and second signals to produce an output value proportional to the feedback value; and (d) returning the feedback value to step (b), so that the feedback loop in the method causes the output value to vary in a manner which is proportional to the ratio of the first stream frequency divided by the second stream frequency.
Claim 7
Independent Claim
144 words
A method of producing a signal which varies as the ratio of the frequency of a first stream to a second stream, the method comprising: (a) accomplishing frequency-discrimination of the first stream, by transforming the first stream into a first signal of value proportional to the frequency of the first stream; (b) accomplishing frequency-discrimination and multiplication of the second stream, by transforming the second stream into a second signal of value proportional to the product of the second stream frequency times a feedback value; (c) combining the first and second signals to produce an output value proportional to the feedback value; and (d) returning the feedback value to step (b), so that the feedback loop in the method causes the output value to vary in a manner which is proportional to the ratio of the first stream frequency divided by the second stream frequency.
Claim 8
Dependent Claim
51 words
The method of claim 4, wherein step (b) includes substeps as follows: (1) switching an input signal at a rate proportional to the reference stream frequency, thereby accomplishing frequency discrimination; and (2) varying the amplitude of the input signal in accordance with the amplitude of the feedback value, thereby accomplishing multiplication.
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) | 1984-09-21 | 1985-03-23 | 1985-09-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-09-21 | 1989-03-23 | 1989-09-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-09-21 | 1993-03-23 | 1993-09-22 | $7700.00 | Window Closed / Lapsed |