US3783392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Long period integrator
Assignee: Singer Co
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Filing: 1972-04-07
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Granted: 1974-01-01
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Expires: 1992-04-07
Abstract
Abstract The device of this invention is an integrator which can operate properly in a wide variety of situations, and particularly in those situations where the input to the integrator may be relatively constant for long periods of time. The integrator of this invention provides means for separating the incoming signals into a magnitude indication and a polarity indication. The magnitude indication is used to control the frequency of a voltage controlled oscillator whose output is supplied to the input of a reversible counter. The polarity indication is used to determine the direction in which the counter counts. The contents of the counter at any instant is converted into an analog quantity by a digital-to-analog converter.
Inventors
- 👤 D Drake
- 👤 E Lloyd
- 👤 R Norris
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 08:38
CPC Classifications
G; G06; G06G; G06G7/00; G06G7/12; G06G7/18
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
349 words
A long time period integrator comprising a first input amplifier, a magnitude circuit comprising a second operational amplifier having a resistive feedback path, means for connecting the output of said first amplifier to a first input of said second amplifier, means for connecting the second input of said second operational amplifier to a fixed positive voltage and for maintaining said first input positive, a multivibrator having a bias input connected to the output of said second amplifier, a third operational amplifier having a feedback path containing a first zener diode, means for connecting a first input to said third amplifier to the output of said first amplifier, means for connecting a second input to said third amplifier to ground, a second zener diode connected between the output of said third amplifier and ground, a counter having a plurality of parallel outputs the energization of which designate in combination the value of the contents of said counter, a first counter input for receiving input pulses which said counter counts in a first direction, a second counter input for receiving pulses which said counter counts in a second direction, a first and a second coincidence gate, means for connecting the output of said multivibrator to one input of each of said first and second gates, means for connecting the other input to said first gate directly to the output of said third amplifier, an inverter, means for connecting the input of said inverter to the output of said third amplifier, means for connecting the output of said inverter to the other input of said second gate, means for connecting the output of said first gate to said first counter input, means for connecting the output of said second gate to said second counter input, means connected to the plurality of outputs of said counter for converting the digital output of said counter to a voltage which represents by its amplitude the value of the contents of said counter at any moment, and a fourth operational amplifier having an integrating feedback path and being connected to the output of said conversion means.
Claim 2
Dependent Claim
349 words
A long time period integrator comprising a first input amplifier, a magnitude circuit comprising a second operational amplifier having a resistive feedback path, means for connecting the output of said first amplifier to a first input of said second amplifier, means for connecting the second input of said second operational amplifier to a fixed positive voltage and for maintaining said first input positive, a multivibrator having a bias input connected to the output of said second amplifier, a third operational amplifier having a feedback path containing a first zener diode, means for connecting a first input to said third amplifier to the output of said first amplifier, means for connecting a second input to said third amplifier to ground, a second zener diode connected between the output of said third amplifier and ground, a counter having a plurality of parallel outputs the energization of which designate in combination the value of the contents of said counter, a first counter input for receiving input pulses which said counter counts in a first direction, a second counter input for receiving pulses which said counter counts in a second direction, a first and a second coincidence gate, means for connecting the output of said multivibrator to one input of each of said first and second gates, means for connecting the other input to said first gate directly to the output of said third amplifier, an inverter, means for connecting the input of said inverter to the output of said third amplifier, means for connecting the output of said inverter to the other input of said second gate, means for connecting the output of said first gate to said first counter input, means for connecting the output of said second gate to said second counter input, means connected to the plurality of outputs of said counter for converting the digital output of said counter to a voltage which represents by its amplitude the value of the contents of said counter at any moment, and a fourth operational amplifier having an integrating feedback path and being connected to the output of said conversion means.
Claim 3
Dependent Claim
20 words
The integrator defined in claim 1 wherein said counter comprises a reversible counter which can count selectively upwardly and downwardly.
References Cited (Backward Citations)
US3550108A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-12-31 | 1977-07-02 | 1978-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-31 | 1981-07-02 | 1982-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-31 | 1985-07-02 | 1986-01-01 | $7700.00 | Window Closed / Lapsed |