Patent US3753143A successfully refreshed from Google Patents.
US3753143A
Expired / Lapsed
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Phase locked oscillator for integer pulse rates
Assignee: Bull HN Information Systems Italia SpA
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Filing: 1971-08-05
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Granted: 1973-08-14
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Expires: 1991-08-05
Abstract
Abstract A phase locked oscillator for locking to a train of pulse signals where the pulse repetition rates are integer multiples of each other. The input pulse signals are directed to a bandpass circuit, a tuned amplifier, the center frequency of which is selected to be the same as the reference frequency of a phase detector. The output signal of the bandpass circuit is a sinusoidal signal directed to the gated or multiplier phase detector. A square wave voltage controlled oscillator has a portion of its output signal fed back to the phase detector. The output of the phase detector controls the frequency of the voltage controlled oscillator. In the phase locked loop, the square wave voltage controlled oscillator is locked to a reference frequency from the bandpass circuit independent of an integer change in the pulse repetition rate of the input pulse train signals.
Inventors
- 👤 M Aguirre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:06
CPC Classifications
G; G11; G11B; G11B20/00; G11B20/10; G11B20/14; G11B20/1403; G11B20/1407; H; H03; H03L; H03L7/00; H03L7/06; H03L7/08; H03L7/0807
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
132 words
A phase locked oscillator system comprising: an oscillator including frequency controlling means for controlling the frequency of an output signal from said oscillator; a phase detector responsive to the output signal from said oscillator and to a sinusoidal reference signal for providing a control signal functionally related to the phase difference between the oscillator output signal and the sinusoidal reference signal; a bandpass circuit responsive to an input pulse signal repetition rate and integer multiples thereof for providing the sinusoidal reference signal equal in frequency to the highest integer multiple of the input pulse signal repetition rate to said phase detector, wherein said phase detector provides the control signal to said frequency controlling means to lock the frequency of the output signal generated by said oscillator to the sinusoidal refErence signal frequency.
Claim 2
Dependent Claim
132 words
A phase locked oscillator system comprising: an oscillator including frequency controlling means for controlling the frequency of an output signal from said oscillator; a phase detector responsive to the output signal from said oscillator and to a sinusoidal reference signal for providing a control signal functionally related to the phase difference between the oscillator output signal and the sinusoidal reference signal; a bandpass circuit responsive to an input pulse signal repetition rate and integer multiples thereof for providing the sinusoidal reference signal equal in frequency to the highest integer multiple of the input pulse signal repetition rate to said phase detector, wherein said phase detector provides the control signal to said frequency controlling means to lock the frequency of the output signal generated by said oscillator to the sinusoidal refErence signal frequency.
Claim 3
Dependent Claim
18 words
A phase locked oscillator system according to claim 1 wherein said oscillator generates square wave output pulse signals.
Claim 4
Dependent Claim
29 words
The phase locked oscillator system according to claim 1 wherein said bandpass circuit further includes a pulse shaper to reshape the input pulse signals to a uniform pulse width.
Claim 5
Dependent Claim
17 words
The phase locked oscillator system according to claim 3 wherein said pulse shaper comprises a one-shot multivibrator.
Claim 6
Dependent Claim
43 words
The phase locked oscillator system according to claim 4 wherein said bandpass circuit comprises a resonant tuned circuit having a resonant frequency equal to the highest integer multiple of the repetition rate of the input pulse signals as shaped by the pulse shaper.
Claim 7
Dependent Claim
43 words
The phase locked oscillator system according to claim 4 wherein the bandpass circuit comprises a narrow-band tuned amplifier having a resonant frequency equal to the highest integer multiple of the repetition rate of the input pulse signals as shaped by the pulse shaper.
Claim 8
Dependent Claim
138 words
In a phase locked oscillator system including a variable frequency oscillator having frequency controlling means, and a phase detector responsive to an output signal from said variable frequency oscillator and to a sinusoidal reference signal for providing a control signal functionally related to the phase difference between the output signal and the sinusoidal reference signal, said control signal controlling said frequency controlling means, wherein the improvement comprises; a bandpass circuit responsive to an input pulse signal repetition rate and integer multiples thereof, for providing the sinusoidal reference signal equal in frequency to the highest integer multiple of the input pulse signal repetition rate to the phase detector, wherein said phase detector provides the control signal to said frequency controlling means to lock the frequency of the output signal generated by the oscillator to the sinusoidal reference signal frequency.
Claim 9
Dependent Claim
138 words
In a phase locked oscillator system including a variable frequency oscillator having frequency controlling means, and a phase detector responsive to an output signal from said variable frequency oscillator and to a sinusoidal reference signal for providing a control signal functionally related to the phase difference between the output signal and the sinusoidal reference signal, said control signal controlling said frequency controlling means, wherein the improvement comprises; a bandpass circuit responsive to an input pulse signal repetition rate and integer multiples thereof, for providing the sinusoidal reference signal equal in frequency to the highest integer multiple of the input pulse signal repetition rate to the phase detector, wherein said phase detector provides the control signal to said frequency controlling means to lock the frequency of the output signal generated by the oscillator to the sinusoidal reference signal frequency.
Claim 10
Dependent Claim
29 words
The phase locked oscillator system according to claim 7 wherein said bandpass circuit further includes a pulse shaper to reshape the input pulse signals to a uniform pulse width.
Claim 11
Dependent Claim
17 words
The phase locked oscillator system according to claim 8 wherein said pulse shaper comprises a one-shot multivibrator.
Claim 12
Dependent Claim
43 words
The phase locked oscillator system according to claim 9 wherein said bandpass circuit comprises a resonant tuned circuit having a resonant frequency equal to the highest integer multiple of the repetition rate of the input pulse signals as shaped by the pulse shaper.
Claim 13
Dependent Claim
43 words
The phase locked oscillator system according to claim 9 wherein the bandpass circuit comprises a narrow-band tuned amplifier having a resonant frequency equal to the highest integer multiple of the repetition rate of the input pulse signals as shaped by the pulse shaper.
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) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |