US4005284A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Analog signal to duty cycle conversion apparatus
Assignee: Boeing North American Inc
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Filing: 1975-09-22
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Granted: 1977-01-25
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Expires: 1995-09-22
Abstract
Abstract An analog signal to duty cycle converter and/or multiplier utilizing an integrator which integrates a composite of an input voltage and a feedback signal to produce a triangular waveform. The triangular waveform, depending upon the polarity of the input signal and the resultant voltage magnitude of the triangular waveform activates one of two sets of voltage sensitive switches for periodically applying feedback voltages to the integrator. If the feedback voltage sources are allowed to vary in amplitude, this variation affects the current or charge passed in the duty cycle obtained and effectively results in multiplication of the input signal times the feedback voltage source amplitude.
Inventors
- 👤 Melvin H. Rhodes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:22
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/16; G06G7/161
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
301 words
Analog to pulse density converting apparatus comprising, in combination: first switch means including first and second gating means each having an input means, an output means and a control means for controlling a conductive path between said input means and said output means of the gating means; first and second feedback signal source means connected to said input means of said first and second gating means respectively of said first switch means; integrating means, including input means and output means; analog signal supplying means; means connecting said analog signal supplying means and said output means of said first switch means to said input means of said integrating means for supplying two signals thereto to be integrated; voltage sensitive second switch means including input means and first and second output means, said second switch means providing a given polarity output at said first output means thereof when a signal at said input means thereof exceeds a first polarity reference level and the second output means thereof providing an output signal of said given polarity when a signal provided to said input means thereof exceeds a second polarity reference level; means connecting said output means of said integrating means to said input means of said second switch means; and means connecting said first and second output means of said second switch means to said control means of said first and second gating means respectively of said first switch means, the output signal from said first output means of said voltage sensitive switch means being representative in pulse density of the amplitude of positive signals provided by said analog signal supplying means and the output signal at said second output means of said second switch means being representative in pulse density of the amplitude of negative signals supplied by said analog signal supplying means.
Claim 2
Dependent Claim
301 words
Analog to pulse density converting apparatus comprising, in combination: first switch means including first and second gating means each having an input means, an output means and a control means for controlling a conductive path between said input means and said output means of the gating means; first and second feedback signal source means connected to said input means of said first and second gating means respectively of said first switch means; integrating means, including input means and output means; analog signal supplying means; means connecting said analog signal supplying means and said output means of said first switch means to said input means of said integrating means for supplying two signals thereto to be integrated; voltage sensitive second switch means including input means and first and second output means, said second switch means providing a given polarity output at said first output means thereof when a signal at said input means thereof exceeds a first polarity reference level and the second output means thereof providing an output signal of said given polarity when a signal provided to said input means thereof exceeds a second polarity reference level; means connecting said output means of said integrating means to said input means of said second switch means; and means connecting said first and second output means of said second switch means to said control means of said first and second gating means respectively of said first switch means, the output signal from said first output means of said voltage sensitive switch means being representative in pulse density of the amplitude of positive signals provided by said analog signal supplying means and the output signal at said second output means of said second switch means being representative in pulse density of the amplitude of negative signals supplied by said analog signal supplying means.
Claim 3
Dependent Claim
17 words
Apparatus as claimed in claim 1 wherein said second switch means comprise a pair of D-type flip-flops.
Claim 4
Dependent Claim
18 words
Apparatus as claimed in claim 1 wherein said second switch means comprises two pairs of feedback connected inverters.
Claim 5
Dependent Claim
184 words
Multiplying apparatus comprising, in combination: first means for supplying a multiplicand signal; second means for supplying feedback multiplier signals, said second means including first and second control means for supplying respectively positive or negative polarity multiplier signals in response to control signals applied thereto; integrator means connected to said first and second means for receiving multiplier and multiplicand signals; voltage sensitive switching means, including input means and first and second output means, said voltage sensitive switching means providing a control output signal at said first output means in response to a signal exceeding a given amplitude of a first polarity applied to said input means and providing a control output signal at said second output means in response to a signal exceeding a given amplitude of a second polarity applied to said input means; means connecting said integrator means to said input means of said voltage sensitive means for supplying integrated signals thereto; means connecting said first and second output means respectively to said first and second control means; and apparatus output means connected to said second means for supplying apparatus product output signals.
Claim 6
Dependent Claim
184 words
Multiplying apparatus comprising, in combination: first means for supplying a multiplicand signal; second means for supplying feedback multiplier signals, said second means including first and second control means for supplying respectively positive or negative polarity multiplier signals in response to control signals applied thereto; integrator means connected to said first and second means for receiving multiplier and multiplicand signals; voltage sensitive switching means, including input means and first and second output means, said voltage sensitive switching means providing a control output signal at said first output means in response to a signal exceeding a given amplitude of a first polarity applied to said input means and providing a control output signal at said second output means in response to a signal exceeding a given amplitude of a second polarity applied to said input means; means connecting said integrator means to said input means of said voltage sensitive means for supplying integrated signals thereto; means connecting said first and second output means respectively to said first and second control means; and apparatus output means connected to said second means for supplying apparatus product output signals.
Claim 7
Dependent Claim
199 words
Analog to pulse repetition rate converting apparatus comprising, in combination: first and second gating means each having input means, output means and control means for controlling a conductive path between said input means and said output means of said gating means; first and second feedback signal source means connected to said input means of said first and second gating means respectively; integrating means including input means and output means; analog signal supplying means; means connecting said analog signal supplying means and said output means of said first and second gating means respectively to said input means of said integrating means; voltage sensitive switch means including input means and control signal output means, said voltage sensitive switch means providing output control signals when a signal at said input means thereof exceeds a given amplitude; means connecting said output means of said integrating means to said input means of said switch means; and means connecting said output means of said switch means to said control means of said gating means, the output signal from said output means of said voltage sensitive switch means being representative in pulse repetition rate of the amplitude of signals provided by said analog signal supplying means.
Claim 8
Dependent Claim
199 words
Analog to pulse repetition rate converting apparatus comprising, in combination: first and second gating means each having input means, output means and control means for controlling a conductive path between said input means and said output means of said gating means; first and second feedback signal source means connected to said input means of said first and second gating means respectively; integrating means including input means and output means; analog signal supplying means; means connecting said analog signal supplying means and said output means of said first and second gating means respectively to said input means of said integrating means; voltage sensitive switch means including input means and control signal output means, said voltage sensitive switch means providing output control signals when a signal at said input means thereof exceeds a given amplitude; means connecting said output means of said integrating means to said input means of said switch means; and means connecting said output means of said switch means to said control means of said gating means, the output signal from said output means of said voltage sensitive switch means being representative in pulse repetition rate of the amplitude of signals provided by said analog signal supplying means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-01-25 | 1980-07-26 | 1981-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-01-25 | 1984-07-26 | 1985-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-01-25 | 1988-07-26 | 1989-01-25 | $7700.00 | Window Closed / Lapsed |