US3831015A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for generating a multiplicity of frequencies from a single reference frequency
Assignee: Intel Corp
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Filing: 1972-06-08
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Granted: 1974-08-20
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Expires: 1992-06-08
Abstract
Abstract A digital system which enables the generation of frequencies, including frequencies which are not submultiples of a reference frequency is disclosed. A predetermined number K is periodically added at the rate of fc to the contents of an N bit register which is permitted to overflow when its content exceeds its capacity. Any frequency equal to Kfc/2N may be generated by the system.
Inventors
- 👤 M Hoff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 00:16
CPC Classifications
G; G06; G06F; G06F7/00; G06F7/60; G06F7/68; H; H03; H03K; H03K4/00; H03K4/06; H03K4/08
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
125 words
A frequency generator for generating a plurality of different frequencies comprising: digital means or sequentially providing P number of predetermined digital numbers; addition means for adding two digital numbers, said addition means being coupled to said digital means; storage means for storing at least P number of digital words, said storage means being coupled to said addition means such that each of said P words in said storage means is added to one of said predetermined digital numbers such that the most significant bits resulting from said addition which exceed a predetermined number of bits are deleted and the remaining bits stored in said storage means; and, timing means for controlling said additions; whereby P number of different frequencies may be generated by said generator.
Claim 2
Dependent Claim
125 words
A frequency generator for generating a plurality of different frequencies comprising: digital means or sequentially providing P number of predetermined digital numbers; addition means for adding two digital numbers, said addition means being coupled to said digital means; storage means for storing at least P number of digital words, said storage means being coupled to said addition means such that each of said P words in said storage means is added to one of said predetermined digital numbers such that the most significant bits resulting from said addition which exceed a predetermined number of bits are deleted and the remaining bits stored in said storage means; and, timing means for controlling said additions; whereby P number of different frequencies may be generated by said generator.
Claim 3
Dependent Claim
28 words
The generator defined by claim 1 including a read-only-memory such that the results of said additions are used as addresses for locating values which correspond to known functions.
Claim 4
Dependent Claim
14 words
The generator defined by claim 2 wherein said known function is a sine function.
Claim 5
Dependent Claim
18 words
The generator defined by claim 2 wherein the output from said read-only-memory is coupled to a digital-to-analog converter.
Claim 6
Dependent Claim
14 words
The generator defined by claim 1 wherein said storage means comprises a shift register.
Claim 7
Dependent Claim
14 words
The generator defined by claim 5 wherein said digital means comprises a shift register.
References Cited (Backward Citations)
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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) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |