US3675137A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Instantaneous sinusoidal orthogonal converter
Assignee: Individual
•
Filing: 1971-04-05
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Granted: 1972-07-04
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Expires: 1991-04-05
Abstract
Abstract A system for instantaneously providing a predetermined phase shift in a sinusoidal signal, the attenuation of which is substantially constant with changes in the frequency of the applied signal. First, phase displacement between two developed signals is accomplished by supplying an input signal both to: a differentiating network and an integrating network. Next, the phase displaced signals are multiplied to cancel the variations in attenuation providing a signal that is substantially invariable with frequency variations and is phase displaced from the initial input signal. As disclosed, a root circuit may provide a signal that is representative of the square root of the multiplied signal.
Inventors
- 👤 Leon Raphael
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:47
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/20; G06G7/16; G06G7/163; H; H03; H03H; H03H11/00; H03H11/02; H03H11/16; H03H11/18
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
123 words
A phase shift system for providing a predetermined phase shift is an applied signal, substantially independent of frequency, and substantially instantaneously, comprising: phase shift means, including a differentiating phase shift circuit and an integrating phase shift circuit having opposed attenuation characteristics as related to frequency, said phase shift means being connected to receive said applied signal for providing first and second signals derived from said applied signal and each having been phase displaced with opposite polarity by substantially said predetermined phase shift; multiplier means for combining said first and second signals to provide a product signal representative of the product of the values of said first and second signals; and output circuit means connected to provide said product signal from said multiplier means.
Claim 2
Dependent Claim
123 words
A phase shift system for providing a predetermined phase shift is an applied signal, substantially independent of frequency, and substantially instantaneously, comprising: phase shift means, including a differentiating phase shift circuit and an integrating phase shift circuit having opposed attenuation characteristics as related to frequency, said phase shift means being connected to receive said applied signal for providing first and second signals derived from said applied signal and each having been phase displaced with opposite polarity by substantially said predetermined phase shift; multiplier means for combining said first and second signals to provide a product signal representative of the product of the values of said first and second signals; and output circuit means connected to provide said product signal from said multiplier means.
Claim 3
Dependent Claim
21 words
A phase shift system for providing a predetermined phase shift according to claim 1 wherein said predetermined phase shift is 90*.
Claim 4
Dependent Claim
30 words
A phase shift system according to claim 1 wherein said output circuit comprises a root circuit for providing a root signal representative of the square root of said product signal.
Claim 5
Dependent Claim
37 words
A phase shift system according to claim 1 wherein said phase shift means includes a first operational amplifier and an interconnected integrating phase shift circuit and a second operational amplifier and an interconnected differentiating phase shift circuit.
Claim 6
Dependent Claim
85 words
A phase shift system according to claim 1 wherein said multiplier means comprises: a first amplifier connected to receive said first signal; a second amplifier connected to receive said second signal to function as a current source; at leAst one pair of diodes; a full-wave rectifier; a third amplifier; means for connecting said first amplifier through said diodes to provide one input to said third amplifier; and means for connecting said second amplifier through said full-wave rectifier to provide another input to said third amplifier.
Claim 7
Dependent Claim
90 words
A multiplier circuit for providing an output signal representative of the product of first and second input signals comprising: a first amplifier connected to receive said first signal; second amplifier connected to receive said second signal to function as a current source; at least one pair of diodes; a full-wave rectifier; a third amplifier; means for connecting said first amplifier through said diodes to provide one input to said third amplifier; and means for connecting said second amplifier through said full-wave rectifier to provide another input to said third amplifier.
Claim 8
Dependent Claim
90 words
A multiplier circuit for providing an output signal representative of the product of first and second input signals comprising: a first amplifier connected to receive said first signal; second amplifier connected to receive said second signal to function as a current source; at least one pair of diodes; a full-wave rectifier; a third amplifier; means for connecting said first amplifier through said diodes to provide one input to said third amplifier; and means for connecting said second amplifier through said full-wave rectifier to provide another input to said third amplifier.
References Cited (Backward Citations)
US3123769A
Cited
US2448526A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-07-04 | 1976-01-03 | 1976-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-04 | 1980-01-03 | 1980-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-04 | 1984-01-03 | 1984-07-04 | $7700.00 | Window Closed / Lapsed |