US3728624A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase meter for comparing rectangular waves
Assignee: Nokia Inc
•
Filing: 1972-02-25
•
Granted: 1973-04-17
•
Expires: 1992-02-25
Abstract
Abstract A large-band phase meter operating by the evaluation of displaced rectangular waves being applied to phase measurements, particularly between two waves having the same frequency but different cyclic ratios furnishing measurements independent of the cyclic ratio.
Inventors
- 👤 Y Salle
- 👤 M Pincemin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 00:26
CPC Classifications
H; H03; H03K; H03K5/00; H03K5/22; H03K5/26; G; G01; G01R; G01R25/00
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
149 words
A phase meter for measuring the phase displacement between a rectangular wave A and a rectangular wave B and providing a direct current voltage varying between a positive maximum value for a measured phase displacement of 0* and a negative maximum value for a phase displacement of 360* in accordance with a linear law of variation, comprising four monostable flip-flops, means responsive to the rectangular waves A and B for providing the respective signals A, A, B and B to the input of a respective monostable flip-flop, four validation circuits each having one input connected to the output of a corresponding monostable flipflop and another input receiving the signals B, B, A and A, respectively, and an operational amplifier having a negative input terminal connected to the outputs of two of said validation circuits and a positive input terminal connected to the outputs of the other two validation circuits.
Claim 2
Dependent Claim
149 words
A phase meter for measuring the phase displacement between a rectangular wave A and a rectangular wave B and providing a direct current voltage varying between a positive maximum value for a measured phase displacement of 0* and a negative maximum value for a phase displacement of 360* in accordance with a linear law of variation, comprising four monostable flip-flops, means responsive to the rectangular waves A and B for providing the respective signals A, A, B and B to the input of a respective monostable flip-flop, four validation circuits each having one input connected to the output of a corresponding monostable flipflop and another input receiving the signals B, B, A and A, respectively, and an operational amplifier having a negative input terminal connected to the outputs of two of said validation circuits and a positive input terminal connected to the outputs of the other two validation circuits.
Claim 3
Dependent Claim
84 words
A phase meter as defined in claim 1 wherein said means responsive to the rectangular waves includes a first input terminal connecting said wave A directly to a first one of said monostable flip-flops, a first inverter connecting said first input terminal to a second one of said monostable flip-flops, a second input terminal connecting said wave B directly to a third one of said monostable flip-flops and a second inverter connecting said second input terminal to the fourth one of said monostable flip-flops.
Claim 4
Dependent Claim
101 words
A phase meter as defined in claim 2 wherein each validation circuit includes first, second, and third AND gates each having a pair of inputs, the outputs of said first and second AND gates being connected to the respective inputs of said third AND gate whose output is connected to an input of said second AND gate, the other input of said second AND gate and an input of said firSt AND gate being connected together to form one input of said validation circuit and the other input of said first AND gate forming the other input of said validation circuit.
Claim 5
Dependent Claim
44 words
A phase meter as defined in claim 3 wherein the output of each validation circuit is connected to an input of said operational amplifier through a respective resistor, all of the resistors connected to the inputs of said operational amplifier having an equal value.
Claim 6
Dependent Claim
48 words
A phase meter as defined in claim 4 wherein said operational amplifier includes a feedback resistor connected between its output and its negative input terminal, said feedback resistor having the same value as the resistors connected between said validation circuits and the input terminals of said operational amplifier.
Claim 7
Dependent Claim
101 words
A phase meter as defined in claim 1 wherein each validation circuit includes first, second, and third AND gates each having a pair of inputs, the outputs of said first and second AND gates being connected to the respective inputs of said third AND gate whose output is connected to an input of said second AND gate, the other input of said second AND gate and an input of said first AND gate being connected together to form one input of said validation circuit and the other input of said first AND gate forming the other input of said validation circuit.
Claim 8
Dependent Claim
44 words
A phase meter as defined in claim 1 wherein the output of each validation circuit is connected to an input of said operational amplifier through a respective resistor, all of the resistors connected to the inputs of said operational amplifier having an equal value.
References Cited (Backward Citations)
US3551808A
Cited
US3482132A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-04-16 | 1976-10-16 | 1977-04-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-04-16 | 1980-10-16 | 1981-04-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-04-16 | 1984-10-16 | 1985-04-17 | $7700.00 | Window Closed / Lapsed |