US4190807A
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Sampled error phaselock or frequencylock systems
Assignee: Boeing North American Inc
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Filing: 1978-07-03
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Granted: 1980-02-26
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Expires: 1998-07-03
Abstract
Abstract Phaselock or frequencylock systems employ sampling means and memory means to effect control. Adjustments in phase or frequency are made according to stored signals and the stored signals are updated in accordance with samples of an error indicative signal.
Inventors
- 👤 Robert J. Weber
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:52
CPC Classifications
H; H03; H03C; H03C1/00; H03C1/02; H03C1/04; H03L; H03L7/00; H03L7/06; H03L7/08; H03L7/081; H03L7/0812; H03L7/0814
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
235 words
The phaselock system comprising: first means for providing a first carrier signal; second means for supplying a second carrier signal in the form of a train of pulses of carrier signal; controllable third means for effecting chanbge in the phase of said second carrier in accordance with a signal σ c ; fourth means, including phase detector means, for providing a signal indicative of difference between (η l (t)+μ) and η 2 (t) where η 1 (t) and η 2 (t) are the phases of said first and second carrier signals respectively, and μ is a constant phase angle; fifth means for storing all at one time, and serially outputting at each pulse occurrence, 1st through Uth individual control signals each of which comprises a component of σ c , U being a predetermined integer ≧2; and sixth means for (a) effecting 1st through Uth successive intervals during each of the pulses of the pulse train, said 1st through Uth intervals corresponding, respectively, to said 1st through Uth control signals, (b) sampling the difference indicative signal during at least one of these U intervals of a train pulse P j , and (c) updating the appropriate one of the U control signals in accordance with the sample such that the updated control signal effects, only at pulses succeeding P j , a change in η 2 (t) which brings it nearer to (η 1 (t)+μ).
Claim 2
Dependent Claim
235 words
The phaselock system comprising: first means for providing a first carrier signal; second means for supplying a second carrier signal in the form of a train of pulses of carrier signal; controllable third means for effecting chanbge in the phase of said second carrier in accordance with a signal σ c ; fourth means, including phase detector means, for providing a signal indicative of difference between (η l (t)+μ) and η 2 (t) where η 1 (t) and η 2 (t) are the phases of said first and second carrier signals respectively, and μ is a constant phase angle; fifth means for storing all at one time, and serially outputting at each pulse occurrence, 1st through Uth individual control signals each of which comprises a component of σ c , U being a predetermined integer ≧2; and sixth means for (a) effecting 1st through Uth successive intervals during each of the pulses of the pulse train, said 1st through Uth intervals corresponding, respectively, to said 1st through Uth control signals, (b) sampling the difference indicative signal during at least one of these U intervals of a train pulse P j , and (c) updating the appropriate one of the U control signals in accordance with the sample such that the updated control signal effects, only at pulses succeeding P j , a change in η 2 (t) which brings it nearer to (η 1 (t)+μ).
Claim 3
Dependent Claim
40 words
The system as defined in claim 1 wherein said sixth means samples the difference indicative signal during each of a plurality of said U intervals of pulse P j and updates each of a plurality of said U control signals.
Claim 4
Dependent Claim
17 words
The system as defined in claim 1 wherein each of said control signals comprises a digital word.
Claim 5
Dependent Claim
184 words
The phaselock system comprising: first means for providing a first carrier signal having phase φ 1 (t); angularly modulatable second means for providing a second carrier signal whose phase φ 2 (t) is to eventually follow φ 3 (t) where φ 3 (t)=φ 1 (t)+θ(t) and θ(t) is a prescribed function of time; third means, including phase detector means, for providing a signal indicative of difference between φ 2 (t) and φ 3 (t); fourth means for storing all at one time, and serially outputting, 1st through Uth individual control signals for producing adjustment of said angularly modulatable means and thus of φ 2 (t), U being a predetermined integer ≧2, and the serial outputting of 1st through Uth control signals reoccurring at predetermined times; and fifth means for sampling the difference indicative signal during at least one control signal adjustment of φ 2 (t) and updating this control signal in accordance with the sample such that the updated control signal, at reoccurrence of the fourth means serial outputting, effects an adjustment of φ 2 (t) which brings it nearer to φ 3 (t).
Claim 6
Dependent Claim
184 words
The phaselock system comprising: first means for providing a first carrier signal having phase φ 1 (t); angularly modulatable second means for providing a second carrier signal whose phase φ 2 (t) is to eventually follow φ 3 (t) where φ 3 (t)=φ 1 (t)+θ(t) and θ(t) is a prescribed function of time; third means, including phase detector means, for providing a signal indicative of difference between φ 2 (t) and φ 3 (t); fourth means for storing all at one time, and serially outputting, 1st through Uth individual control signals for producing adjustment of said angularly modulatable means and thus of φ 2 (t), U being a predetermined integer ≧2, and the serial outputting of 1st through Uth control signals reoccurring at predetermined times; and fifth means for sampling the difference indicative signal during at least one control signal adjustment of φ 2 (t) and updating this control signal in accordance with the sample such that the updated control signal, at reoccurrence of the fourth means serial outputting, effects an adjustment of φ 2 (t) which brings it nearer to φ 3 (t).
Claim 7
Dependent Claim
45 words
The system as defined in claim 4 wherein a predetermined one of φ 1 (t) or φ 2 (t) is essentially equal to (ω c t+ε) where (ω c /2π) is the frequency of the corresponding carrier signal and γ is a constant phase angle.
Claim 8
Dependent Claim
21 words
The system as defined in claim 5 where φ(t) is essentially equal to ρ where ρ is a constant phase angle.
Claim 9
Dependent Claim
21 words
The system as defined in claim 4 where φ(t) is essentially equal to ρ where ρ is a constant phase angle.
Claim 10
Dependent Claim
30 words
The system as defined in claim 4 wherein said second means includes means for providing said second carrier signal in the form of a train of pulses of carrier signal.
Claim 11
Dependent Claim
37 words
The system as defined in claim 8 wherein φ 1 (t) is essentially equal to (ω c t+γ) where (ω c /2π) is the frequency of said first carrier signal and γ is a constant phase angle.
Claim 12
Dependent Claim
21 words
The system as defined in claim 9 wherein θ(t) is essentially equal to ρ where ρ is a constant phase angle.
Claim 13
Dependent Claim
54 words
The system as defined in claim 10 wherein said fifth means comprises means for sampling the difference indicative signal during each of a plurality of the U control signal adjustments of φ 2 (t) and updating a plurality of corresponding control signals each in accordance with a different and appropriate one of the samples.
Claim 14
Dependent Claim
50 words
The system as defined in claim 10 wherein said fifth means comprises means for sampling the difference indicative signal during each of the U control signal adjustments of φ 2 (t) and updating each of the corresponding control signals in accordance with a different and appropriate one of the samples.
Claim 15
Dependent Claim
17 words
The system as defined in claim 4 wherein each of said control signals comprises a digital word.
Claim 16
Independent Claim
159 words
The system comprising: angularly modulatable means for providing a carrier signal whose phase φ a (t) is to eventually follow φ b (t) where φ b (t) is a prescribed function of time, means for providing a signal which is a function of difference between φ a (t) and φ b (t), and means for (i) storing all at one time, and serially outputting, 1st through Uth individual control signals for producing adjustment of said angularly modulatable means and thus of φ a (t), U being a predetermined integer ≧2, and the serial outputting of 1st through Uth control signals reoccurring at predetermined times, (ii) sampling the difference indicative signal during at least one control signal adjustment of φ a (t), and (iii) updating this control signal in accordance with the sample such that the updated control signal, at reoccurrence of the serial outputting, effects an adjustment of φ a (t) which brings it nearer to φ b (t).
Claim 17
Independent Claim
159 words
The system comprising: angularly modulatable means for providing a carrier signal whose phase φ a (t) is to eventually follow φ b (t) where φ b (t) is a prescribed function of time, means for providing a signal which is a function of difference between φ a (t) and φ b (t), and means for (i) storing all at one time, and serially outputting, 1st through Uth individual control signals for producing adjustment of said angularly modulatable means and thus of φ a (t), U being a predetermined integer ≧2, and the serial outputting of 1st through Uth control signals reoccurring at predetermined times, (ii) sampling the difference indicative signal during at least one control signal adjustment of φ a (t), and (iii) updating this control signal in accordance with the sample such that the updated control signal, at reoccurrence of the serial outputting, effects an adjustment of φ a (t) which brings it nearer to φ b (t).
Claim 18
Independent Claim
165 words
The system comprising: angularly modulatable means for providing a carrier signal having frequency ω x (t) which is to eventually follow ω y (t) where ω y (t) is a prescribed function of time, means for providing a signal which is a function of difference between ω x (t) and ω y (t), and means for (i) storing all at one time, and serially outputting, 1st through Uth individual control signals for producing adjustment of said angularly modulatable means and thus of said carrier signal, U being a predetermined integer ≧2, and the serial outputting of 1st through Uth control signals reoccurring at predetermined times, (ii) sampling the frequency difference dependent signal during at least one control signal adjustment of the carrier, and (iii) updating this control signal in accordance with the sample such that the updated control signal, at reoccurrence of the serial outputting, effects an adjustment of the carrier so as to reduce the difference between ω x (t) and ω y (t).
Claim 19
Independent Claim
165 words
The system comprising: angularly modulatable means for providing a carrier signal having frequency ω x (t) which is to eventually follow ω y (t) where ω y (t) is a prescribed function of time, means for providing a signal which is a function of difference between ω x (t) and ω y (t), and means for (i) storing all at one time, and serially outputting, 1st through Uth individual control signals for producing adjustment of said angularly modulatable means and thus of said carrier signal, U being a predetermined integer ≧2, and the serial outputting of 1st through Uth control signals reoccurring at predetermined times, (ii) sampling the frequency difference dependent signal during at least one control signal adjustment of the carrier, and (iii) updating this control signal in accordance with the sample such that the updated control signal, at reoccurrence of the serial outputting, effects an adjustment of the carrier so as to reduce the difference between ω x (t) and ω y (t).
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) | 1983-02-25 | 1983-08-27 | 1984-02-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-02-25 | 1987-08-27 | 1988-02-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-02-25 | 1991-08-27 | 1992-02-26 | $7700.00 | Window Closed / Lapsed |