Patent US5570066A successfully refreshed from Google Patents.
US5570066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of programming a frequency synthesizer
Assignee: Quarterhill Inc
•
Filing: 1994-08-30
•
Granted: 1996-10-29
•
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 15:38
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.
References Cited (Backward Citations)
US4320357A
Cited
US4290029A
Cited
US4442413A
Cited
US4485404A
Cited
US4568888A
Cited
US4940950A
Cited
US5152005A
Cited
US4993048A
Cited
US5319681A
Cited
US5301366A
Cited
US5420545A
Cited
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 |