US5570066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of programming a frequency synthesizer
Assignee: Quarterhill Inc
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Filing: 1994-08-30
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Granted: 1996-10-29
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Expires: 2014-08-30
Abstract
Abstract In order to program the output frequency of a synthesizer such as that of a two-way radio, first the reference oscillator is warped or tuned substantially to one limit of its tuning range. The "N" divisor of the synthesizer dividor is then selected to produce a loop output close to the desired loop output frequency. The reference oscillator is then tuned to provide the desired loop output frequency.
Inventors
- 👤 John E. Eberhardt
- 👤 Ronald L. Bane
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:06
CPC Classifications
H; H03; H03L; H03L7/00; H03L7/06; H03L7/16; H03L7/18; H03L7/183; H03J; H03J1/00; H03J1/0008; H03L7/197
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
71 words
A method of tuning a voltage control oscillator of a frequency synthesizer to a desired frequency, comprising the steps of: coarse tuning the frequency synthesizer by adjusting a divisor of a loop divider until its output frequency is close to the desired frequency; then adjusting a crystal reference oscillator to produce the desired frequency; providing a memory with an associated microprocessor; and storing the coarse and desired frequencies in said memory.
Claim 2
Independent Claim
71 words
A method of tuning a voltage control oscillator of a frequency synthesizer to a desired frequency, comprising the steps of: coarse tuning the frequency synthesizer by adjusting a divisor of a loop divider until its output frequency is close to the desired frequency; then adjusting a crystal reference oscillator to produce the desired frequency; providing a memory with an associated microprocessor; and storing the coarse and desired frequencies in said memory.
Claim 3
Independent Claim
57 words
A method of programming an output frequency of a synthesized radio comprising the steps of: coarse tuning the synthesized radio by changing a divisor of a loop divider; fine tuning the synthesized radio by warping a loop reference oscillator; providing a memory with an associated microprocessor; and storing the coarse and fine tuning values in said memory.
Claim 4
Independent Claim
57 words
A method of programming an output frequency of a synthesized radio comprising the steps of: coarse tuning the synthesized radio by changing a divisor of a loop divider; fine tuning the synthesized radio by warping a loop reference oscillator; providing a memory with an associated microprocessor; and storing the coarse and fine tuning values in said memory.
Claim 5
Dependent Claim
54 words
A method of programming the operating frequency of the synthesized radio as defined in claim 2, comprising the further steps of: repeating the steps of claim 2 to coarse and fine tune the synthesized radio for at least a second frequency; and and storing the coarse and fine tuning values for the second frequency.
Claim 6
Independent Claim
88 words
A method of programming a synthesizer comprising the steps of: operating a controller to provide "N" values to a divide-by-N divider; selecting a value of "N" that approximately provides a desired output frequency; operating the controller to provide digital values corresponding to analog voltage values; applying the analog voltage values to a tunable loop reference oscillator to warp the oscillator frequency; selecting a digital value that corresponds to desired loop output frequency; providing a with an associated microprocessor; and storing the approximate and desired frequencies in said memory.
Claim 7
Independent Claim
88 words
A method of programming a synthesizer comprising the steps of: operating a controller to provide "N" values to a divide-by-N divider; selecting a value of "N" that approximately provides a desired output frequency; operating the controller to provide digital values corresponding to analog voltage values; applying the analog voltage values to a tunable loop reference oscillator to warp the oscillator frequency; selecting a digital value that corresponds to desired loop output frequency; providing a with an associated microprocessor; and storing the approximate and desired frequencies in said memory.
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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) | 1999-10-29 | 2000-04-29 | 2000-10-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-10-29 | 2004-04-29 | 2004-10-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-10-29 | 2008-04-29 | 2008-10-29 | $7700.00 | Window Closed / Lapsed |