US3631233A
Expired / Lapsed
US
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Binary vector rotator and angle-to-binary converter
Assignee: Singer Co
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Filing: 1969-08-08
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Granted: 1971-12-28
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Expires: 1989-08-08
Abstract
Abstract This specification discloses an analogue system comprising an operational amplifier, a plurality of analogue hold amplifiers, which operate to store an applied signal voltage level, a plurality of precision resistors and a programming means which controls successive summing operations in the operational amplifier and the storage of the resulting sums in the analogue hold amplifiers to carry out the desired conversion of the analogue input signals to a desired digital number. Alternatively, the system can be operated to carry out a desired rotation of a vector represented by analogue signals through a digitally represented angle.
Inventors
- 👤 Joseph V Mckenna
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:37
CPC Classifications
G; G06; G06J; G06J1/00; H; H03; H03M; H03M1/00; H03M1/12; H03M1/22
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
138 words
A system for generating a digital number to represent an angle from input analogue signals representing the sine and cosine of said angle comprising arithmetic means for multiplying an analogue signal times 1/(2 cos 45* ) and to find the algebraic sum of and difference between analogue signals, and means to control said arithmetic means to find the difference in magnitude between said input signals representing the sine and cosine of said angle and to multiply said difference times 1/(2 cos 45* ), wherein said system includes polarity detecting means for sensing the polarity of an analogue signal and wherein said control means controls said polarity detecting means to sense the polarity of said input signals, and wherein said control means controls said polarity detector to determine the polarity of the difference in magnitude between said input signals.
Claim 2
Independent Claim
138 words
A system for generating a digital number to represent an angle from input analogue signals representing the sine and cosine of said angle comprising arithmetic means for multiplying an analogue signal times 1/(2 cos 45* ) and to find the algebraic sum of and difference between analogue signals, and means to control said arithmetic means to find the difference in magnitude between said input signals representing the sine and cosine of said angle and to multiply said difference times 1/(2 cos 45* ), wherein said system includes polarity detecting means for sensing the polarity of an analogue signal and wherein said control means controls said polarity detecting means to sense the polarity of said input signals, and wherein said control means controls said polarity detector to determine the polarity of the difference in magnitude between said input signals.
Claim 3
Dependent Claim
104 words
A system as recited in claim 1 wherein said arithmetic means is selectively operable to multiply an analogue signal times 1/2 cos 22.5* , wherein said arithmetic means produces a first computed analogue signal representing the difference in magnitude between said input signals multiplied times 1/2 cos 45*, and wherein said control means controls said arithmetic means to find he difference between said first computed analogue signal and the one of said input signals which is of the opposite polarity from said first computed analogue signal and to multiply the resulting difference times 1/(2 cos 22.5* ) to produce a second computed analogue signal.
Claim 4
Dependent Claim
15 words
A system as recited in claim 2 including means to store said computed analogue signals.
Claim 5
Dependent Claim
88 words
A system as recited in claim 2 wherein said arithmetic means is operable to multiply and analogue signals times 1/(2 cos 11.25* ) and wherein said control means controls said arithmetic means to find the algebraic sum of said second computed analogue signal and the one of the analogue signals algebraically summed to obtain said second computed analogue signal which is of the opposite polarity from he second computed analogue signal and to multiply the resulting difference times 1/(2 11.25* ) to produce a third computed analogue signal.
Claim 6
Dependent Claim
19 words
A system as recited in claim 4 including a plurality of storage means to store said computed analogue signals.
Claim 7
Independent Claim
113 words
A method of determining a digital number representing an angle from input analogue signals representing the sine and cosine of said angle comprising sensing the polarities of said input analogue signals and algebraically combining said signals to produce a computed analogue signal representing the difference in magnitude between said input analogue signals multiplied by 1/(2 cos 45* ), and further comprising algebraically summing said computed analogue signal with the one of said input analogue signals which is of the opposite polarity from said computed analogue signal and multiplying the resulting sum times 1/(2 cos 22.5* ) to produce a second computed analogue signal representing such resulting sum multiplied by 1/(2 cos 22.5* ).
Claim 8
Independent Claim
113 words
A method of determining a digital number representing an angle from input analogue signals representing the sine and cosine of said angle comprising sensing the polarities of said input analogue signals and algebraically combining said signals to produce a computed analogue signal representing the difference in magnitude between said input analogue signals multiplied by 1/(2 cos 45* ), and further comprising algebraically summing said computed analogue signal with the one of said input analogue signals which is of the opposite polarity from said computed analogue signal and multiplying the resulting sum times 1/(2 cos 22.5* ) to produce a second computed analogue signal representing such resulting sum multiplied by 1/(2 cos 22.5* ).
Claim 9
Dependent Claim
25 words
A method as recited in claim 6 further comprising determining the polarity of said first mentioned computed analogue signal and said second computed analogue signal.
Claim 10
Dependent Claim
71 words
A method as recited in claim 6 further comprising algebraically summing said second computed analogue signal with the one of the analogue signals algebraically summed to produce said second computed analogue signal which is of the opposite polarity from said second computed analogue signal and multiplying the resulting sum times 1/(2 cos 11.25* ) to produce a third computed analogue signal representing such resulting sum multiplied by 1/(2 cos 11.25* ).
Claim 11
Dependent Claim
17 words
A method as recited in claim 8 further comprising determining the polarities of said computed analogue signals.
Claim 12
Independent Claim
136 words
A method of determining the sine of the angle displaced a number of degrees represented by an input binary number from an input angle represented by first and second analogue signals representing the sine and cosine of said input angle, respectively, comprising algebraically combining said first and second analogue signals and multiplying the result by 1/(2 cos 45* ) to produce a third analogue signal, algebraically summing said third analogue signal with said first analogue signal and multiplying the resulting sum times 1/(2 cos 22.5* ) to produce a fourth analogue signal if the digit of said input binary number, the order of which represents 45 is zero and algebraically summing said third analogue signal with said second analogue signal and multiplying the resulting sum times 1/(2 cos 22.5* ) if said digit is a one.
Claim 13
Independent Claim
136 words
A method of determining the sine of the angle displaced a number of degrees represented by an input binary number from an input angle represented by first and second analogue signals representing the sine and cosine of said input angle, respectively, comprising algebraically combining said first and second analogue signals and multiplying the result by 1/(2 cos 45* ) to produce a third analogue signal, algebraically summing said third analogue signal with said first analogue signal and multiplying the resulting sum times 1/(2 cos 22.5* ) to produce a fourth analogue signal if the digit of said input binary number, the order of which represents 45 is zero and algebraically summing said third analogue signal with said second analogue signal and multiplying the resulting sum times 1/(2 cos 22.5* ) if said digit is a one.
Claim 14
Dependent Claim
114 words
a method s recited in claim 10 further comprising algebraically summing said fourth signal with said first signal if said first mentioned digit is a zero and a second digit of said input binary number, in order of which represents 22.5* is a zero, with said third signal if said first mentioned digit is zero and said second digit is a one or if said first mentioned digit is a one and said second digit is a zero, and with said second signal if said first mentioned digit is a one and said second digit is a zero; and multiplying the resulting sum by 1/(2 cos 11.25* ) to produce a fifth analogue signal.
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) | 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 |