Patent US3882402A successfully refreshed from Google Patents.
US3882402A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Circuit for transmitting velocity signals derived from position signals
Assignee: Digital Equipment Corp
•
Filing: 1973-02-26
•
Granted: 1975-05-06
•
Expires: 1993-02-26
Abstract
Abstract A rate signal generator for a second order servo-mechanism. A position transducer generates at least two phase-displaced sinusoidal position signals. These signals synchronize a multiphase clock which generates a plurality of mutually exclusive clocking signals, one clocking signal being centered on each zero crossing for a position signal. Gated differentiator circuits are responsive to the clocking signals at respective position signal zero crossings to generate signals representing the derivative of each position signal. A summing circuit combines the individual gated derivative signals and generates a DC rate signal. The magnitude of this rate signal indicates speed; the polarity, direction.
Inventors
- 👤 Dale J Jensen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:02
CPC Classifications
G; G01; G01P; G01P3/00; G01P3/42; G01P3/44; G01P13/00; G01P13/02; G01P13/04; G01P13/045
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
126 words
A velocity signal generator responsive to a plurality of phase displaced cyclical sinusoidal position signals for transmitting a velocity signal, said generator comprising: A. input means for receiving the position signals, B. multi-phase signal means connected to said input means for generating a plurality of mutually exclusive phase signals synchronized to the position signals, one phase signal being associated with each zero crossing for each position signal, C. gated differentiating means connected to receive each position signal for generating a differentiated position signal as an output signal during intervals determined by a corresponding one of the phase signals, the output signals having the same polarity, and D. means for summing the output signals from said gated differentiating means, said summing means thereby transmitting the velocity signal.
Claim 2
Dependent Claim
126 words
A velocity signal generator responsive to a plurality of phase displaced cyclical sinusoidal position signals for transmitting a velocity signal, said generator comprising: A. input means for receiving the position signals, B. multi-phase signal means connected to said input means for generating a plurality of mutually exclusive phase signals synchronized to the position signals, one phase signal being associated with each zero crossing for each position signal, C. gated differentiating means connected to receive each position signal for generating a differentiated position signal as an output signal during intervals determined by a corresponding one of the phase signals, the output signals having the same polarity, and D. means for summing the output signals from said gated differentiating means, said summing means thereby transmitting the velocity signal.
Claim 3
Dependent Claim
61 words
A velocity signal generator as recited in Claim 1 wherein said multi-phase signal means comprises: i. means for combining the position signals to obtain signals representing the sum and difference of the position signals, ii. means responsive to the sum and difference signals for generating binary signals, and iii. a decoder responsive to the binary signals for generating the phase signals.
Claim 4
Dependent Claim
22 words
A velocity signal generator as recited in claim 2 wherein said binary signal generating means comprises a plurality of Schmidt trigger circuits.
Claim 5
Dependent Claim
49 words
A velocity signal generator as recited in claim 1 wherein said differentiating means comprises a pair of differentiating circuits for each position signal, means connecting each position signal to each corresponding differentiating circuit and output means for gating signals from said differentiating circuits in response to the phase signals.
Claim 6
Dependent Claim
85 words
A velocity signal generator as recited in claim 1 wherein A. said differentiating means comprises a first differentiator connected to receive a first position signal and a second differentiator connected to receive a second position signal and inverting and noninverting amplifying means connected to the output of each said differentiators to receive signals therefrom, each of said amplifiers coupling a signal therethrough in response to a gating signal; and B. means for connecting phase signals to said amplifier means to control coupling of signals therethrough.
Claim 7
Dependent Claim
61 words
A velocity signal generator as recited in claim 5 wherein said multi-phase signal means comprises a pair of Schmidt triggers, the outputs of each of said Schmidt trigger circuits being connected to a control input of each of said amplifier means, conduction of the Schmidt triggers thereby controlling the coupling of signals through said amplifier means in a mutually exclusive fashion.
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) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |