US3631340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase angle analyzer
Assignee: Individual
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Filing: 1970-04-21
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Granted: 1971-12-28
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Expires: 1990-04-21
Abstract
Abstract A phase angle analyzer for producing a first output signal having a magnitude proportional to the difference in phase between first and second input signals, and having a polarity depending upon whether the first or second input signal is leading. The input signals are applied to a first channel, and integrated and applied to a second channel. In each channel, the resulting signals are converted to square waves and fed to the inputs of a first differential amplifier. The square waves are also differentiated to produce pulses for controlling a bistable multivibrator. The multivibrator and differential amplifier control a plurality of gates acting as a double-pole, doublethrow switch. The gated outputs from the two channels are logically combined and applied to a further differential amplifier. This amplifier produces at its output a series of pulses, each pulse being proportional in duration to the magnitude of the phase difference between the two input signals. The pulses are positive if the first signal leads the second signal, and are negative if the first signal lags the second signal. The pulses from the further differential amplifier are passed through a filter and applied to a meter to provide a direct reading of the phase relationship between the input signals. The output of the filter is differentiated and applied to a second meter to provide an indication of the rate at which the phase difference between the input signals is changing.
Inventors
- 👤 Joseph G Miller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 00:49
CPC Classifications
G; G01; G01R; G01R25/00
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
224 words
A phase angle analyzer for analyzing the phase relationship between first and second signals, said analyzer comprising: a first channel including, a differential amplifier, having first and second inputs and first and second outputs; a bistable multivibrator having first and second outputs; first means responsive to said first and second signals for applying first and second square waves to the first and second inputs, respectively, of said differential amplifier; second means responsive to said first means for applying switching signals to said bistable multivibrator; first and second channel output leads; first and second gates responsive to the first and second outputs, respectively, of said differential amplifier and the first output of said bistable multivibrator; third and fourth gates responsive to the first and second outputs, respectively, of said differential amplifier and the second output of said bistable multivibrator; a further differential amplifier; means connecting said first and fourth gates to a first input of said further differential amplifier; and, means connecting said second and third gates to a second input of said further differential amplifier, whereby said further differential amplifier produces a sequence of output pulses, each of said pulses being proportional in duration to the magnitude of the difference in phase between said first and second signals, the polarity of said pulses depending upon which of said first and second signals is leading.
Claim 2
Dependent Claim
224 words
A phase angle analyzer for analyzing the phase relationship between first and second signals, said analyzer comprising: a first channel including, a differential amplifier, having first and second inputs and first and second outputs; a bistable multivibrator having first and second outputs; first means responsive to said first and second signals for applying first and second square waves to the first and second inputs, respectively, of said differential amplifier; second means responsive to said first means for applying switching signals to said bistable multivibrator; first and second channel output leads; first and second gates responsive to the first and second outputs, respectively, of said differential amplifier and the first output of said bistable multivibrator; third and fourth gates responsive to the first and second outputs, respectively, of said differential amplifier and the second output of said bistable multivibrator; a further differential amplifier; means connecting said first and fourth gates to a first input of said further differential amplifier; and, means connecting said second and third gates to a second input of said further differential amplifier, whereby said further differential amplifier produces a sequence of output pulses, each of said pulses being proportional in duration to the magnitude of the difference in phase between said first and second signals, the polarity of said pulses depending upon which of said first and second signals is leading.
Claim 3
Dependent Claim
60 words
A phase angle analyzer as claimed in claim 1 and further comprising: a second channel like said first channel; means connecting the first and fourth gates of said second channel to said first input of said further differential amplifier; and, means connecting the second and third gates of said second channel to said second input of said further differential amplifier.
Claim 4
Dependent Claim
77 words
A phase angle analyzer as claimed in claim 2 wherein: said first and second signals are sine waves; said first means of said first channel comprises first and second square wave generator means responsive to said first and second signals, respectively; and, said first means of said second channel comprises first and second integrators responsive to said first and second signals and third and fourth square wave generator means responsive to said first and second integrators, respectively.
Claim 5
Dependent Claim
28 words
A phase angle analyzer as claimed in claim 3 and further comprising filter means responsive to said further differential amplifier for smoothing and purifying the output signal therefrom.
Claim 6
Dependent Claim
40 words
A phase angle analyzer as claimed in claim 4 and further comprising differentiator means responsive to said filter means for producing an output signal proportional to the rate of change of the phase difference between said first and second signals.
Claim 7
Dependent Claim
43 words
A phase angle analyzer as claimed in claim 4 and furtheR comprising a meter connected to the output of said filter means for indicating whether said first signal leads or lags said second signal in phase, and the magnitude of the phase difference.
Claim 8
Dependent Claim
27 words
A phase angle analyzer as claimed in claim 6 wherein said meter comprises an ammeter connected between a reference potential and the output of said filter means.
Claim 9
Dependent Claim
161 words
A phase angle analyzer for analyzing the phase relationship between first and second alternating signals, said analyzer comprising: first and second square wave generator means responsive to said first and second alternating signals for producing first and second trains of square wave pulses alternating between first and second signal levels and having the same phase relationship as said alternating signals; first difference amplifier means having first and second inputs responsive to said first and second square wave generator means for producing at first and second outputs two trains of square wave pulses, the difference between said square wave trains being proportional to the phase difference between said alternating signals; a differential amplifier means having first and second inputs and an output; and, crossover switch means for selectively connecting the first and second outputs of said first difference amplifier to the first and second inputs respectively of said differential amplifier, or to the second and first inputs respectively of said differential amplifier.
Claim 10
Dependent Claim
161 words
A phase angle analyzer for analyzing the phase relationship between first and second alternating signals, said analyzer comprising: first and second square wave generator means responsive to said first and second alternating signals for producing first and second trains of square wave pulses alternating between first and second signal levels and having the same phase relationship as said alternating signals; first difference amplifier means having first and second inputs responsive to said first and second square wave generator means for producing at first and second outputs two trains of square wave pulses, the difference between said square wave trains being proportional to the phase difference between said alternating signals; a differential amplifier means having first and second inputs and an output; and, crossover switch means for selectively connecting the first and second outputs of said first difference amplifier to the first and second inputs respectively of said differential amplifier, or to the second and first inputs respectively of said differential amplifier.
Claim 11
Dependent Claim
155 words
A phase angle analyzer as claimed in claim 8 wherein said crossover switch means comprises: a multivibrator having first and second stable states; differentiator means responsive to said first and second square wave generators for applying switching pulses to said multivibrator; said multivibrator including means responsive to said switching pulses for switching to a first state only in response to a switching pulse of a first level and switching to a second state only in response to a switching pulse; and, gating means responsive to said multivibrator and said first and second outputs of said first difference amplifier means for selectively applying signals to the first and second inputs of said differential amplifier means whereby said differential amplifier means produces at its output a signal having a magnitude proportional to the phase difference between said first and second alternating signals and a polarity dependent upon which if said first and second alternating signals is leading.
Claim 12
Dependent Claim
220 words
A phase angle analyzer as claimed in claim 9 and further comprising: first and second integrators responsive to said first and second alternating signals, respectively; third and fourth square wave generator means responsive to said first and second integrators for producing third and fourth trains of square wave pulses alternating between first and second levels and having the same phase relationship as said alternating signals; second difference amplifier means having first and second inputs responsive to said third and fourth square wave generator means for producing at first and second outputs two trains of square wave pulses, the difference between said square wave trains being proportional to the phase difference between said alternating signals; a second multivibrator having first and second stable states; differentiator means responsive to said third and fourth square wave generators for applying switching pulses to said second multivibrator, said second multivibrator including means responsive to said switching pulses for switching to a first state only in response to a switching pulse of a first level and switching to a second state only in response to switching pulses of a second level; and, gating means responsive to said second multivibrator and the first and second outputs of said second difference amplifier means for selectively applying signals to the first and second inputs of said differential amplifier means.
References Cited (Backward Citations)
US2963648A
Cited
US3519841A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-27 | 1975-06-28 | 1975-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-27 | 1979-06-28 | 1979-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-27 | 1983-06-28 | 1983-12-28 | $7700.00 | Window Closed / Lapsed |