US3777261A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Calibration apparatus and method for use with sweep rate test measurement equipment
Assignee: SP-MICROWAVE Inc
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Filing: 1971-08-27
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Granted: 1973-12-04
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Expires: 1991-08-27
Abstract
Abstract An apparatus used in conjunction with sweep rate test measurement equipment to normalize output data produced by the test equipment which includes a comparator that is responsive to correction data produced by the test equipment while the test equipment is coupled to a standard device having known parameters. A reference data signal is also applied to the comparator simultaneously with the correction data and the comparator produces difference signals representative of deviations in magnitude between the correction data and the reference data signals which are stored in shift registers at the sweep rate of the test equipment. The test equipment is subsequently coupled to prime equipment having unknown parameters for test measurement and the stored difference signals are combined with the test data from the prime equipment in a divider circuit which produces output test data that is normalized to the known parameters of the standard equipment.
Inventors
- 👤 H Strenglein
- 👤 D Kent
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:22
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/28; G01R31/317; G01R31/3181; G01R31/319; G01R31/31903; G01R31/31908; G01R31/3191
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
236 words
Calibration apparatus for use with sweep rate tesT equipment which provides corrections to test data obtained during measurement of prime equipment in accordance with stored data accumulated during calibration of said test equipment with a standard device comprising comparator means having a first input terminal responsive to signals produced by said sweep rate test equipment and a second input terminal responsive to reference data signals for producing difference output signals during calibration of said test equipment with said standard device, integrator means coupled to said comparator means for integrating said difference output signals and producing said reference data signals in accordance with said integrated difference output signals, storage means coupled to said comparator means for accumulating said difference output signals, control means responsive to said sweep rate of said test equipment for synchronizing the accumulation of said difference signals in said storage means to said sweep rate of said test equipment, combining means having a first input terminal coupled to said integrator means for receiving said reference data signals, and switching means for disconnecting said comparator means from said test equipment, coupling the output of said storage means to the input of said integrator means, and coupling said test equipment to a second input terminal on said combining means during measurement of said prime equipment whereby said combining means normalizes said test data received from said test equipment in accordance with said stored reference data signals.
Claim 2
Dependent Claim
236 words
Calibration apparatus for use with sweep rate tesT equipment which provides corrections to test data obtained during measurement of prime equipment in accordance with stored data accumulated during calibration of said test equipment with a standard device comprising comparator means having a first input terminal responsive to signals produced by said sweep rate test equipment and a second input terminal responsive to reference data signals for producing difference output signals during calibration of said test equipment with said standard device, integrator means coupled to said comparator means for integrating said difference output signals and producing said reference data signals in accordance with said integrated difference output signals, storage means coupled to said comparator means for accumulating said difference output signals, control means responsive to said sweep rate of said test equipment for synchronizing the accumulation of said difference signals in said storage means to said sweep rate of said test equipment, combining means having a first input terminal coupled to said integrator means for receiving said reference data signals, and switching means for disconnecting said comparator means from said test equipment, coupling the output of said storage means to the input of said integrator means, and coupling said test equipment to a second input terminal on said combining means during measurement of said prime equipment whereby said combining means normalizes said test data received from said test equipment in accordance with said stored reference data signals.
Claim 3
Dependent Claim
69 words
Calibration apparatus for use with sweep rate test equipment as described in claim 1 in which said comparator means includes pulse generator means which produce a pulse output signal on a first terminal when said first test data signal is greater than said reference data signal and produce a pulse output signal on a second terminal when said first test data signal is less than said reference data signal.
Claim 4
Dependent Claim
78 words
Calibration apparatus for use with sweep rate test equipment as described in claim 2 in which said integrator means has a first input terminal coupled to said pulse generator means for receiving a pulse signal when said first test data signal is greater than said reference data signal and has a second input terminal coupled to said pulse generator means for receiving a pulse signal when said first test data signal is less than said reference data signal.
Claim 5
Dependent Claim
49 words
Calibration apparatus for use with sweep rate test equipment as described in claim 1 in which said integrator means includes up-down counter circuits coupled to digital-to-analog converter output circuits for providing a reference data signal that may be stopped indefinitely to provide a constant value of reference data signal.
Claim 6
Dependent Claim
27 words
Calibration apparatus for use with sweep rate test equipment as described in claim 1 in which said storage means includes a pair of parallel coupled shift registers.
Claim 7
Dependent Claim
56 words
Calibration apparatus for use with sweep rate test equipment as described in claim 1 in which said control means includes sweep comparator means having a first input terminal coupled to a sweep rate output terminal of said test equipment and a second input terminal responsive to a reference sweep signal for producing a sweep difference signal.
Claim 8
Dependent Claim
47 words
Calibration apparatus for use with sweep rate test equipment as described in claim 6 in which said control means further includes sweep pulse generator means responsive to said sweep difference signal for producing a clock frequency signal when said sweep rate signal exceeds said reference sweep signal.
Claim 9
Dependent Claim
35 words
Calibration apparatus for use with sweep rate test equipment as described in claim 7 in which said control means further includes feedback means responsive to said clock frequency signal for producing said reference sweep signal.
Claim 10
Dependent Claim
46 words
Calibration apparatus for use with sweep rate test equipment as described in claim 7 in which said control means includes logic circuit means which produce an inhibit signal for aPplication to said sweep pulse generator means in response to a specific signal from said storage means.
Claim 11
Dependent Claim
54 words
Calibration apparatus for use with sweep rate test equipment as described in claim 1 in which said combining means includes a divider circuit which normalizes said second test data signals from said test equipment by dividing said second test data signals by said reference data signals at the sweep rate of said test equipment.
Claim 12
Dependent Claim
46 words
Calibration apparatus for use with sweep rate test equipment as described in claim 1 in which said combining means includes an adder circuit for normalizing said second test data signals from said test equipment by adding said reference data signals to said second test data signals.
Claim 13
Dependent Claim
46 words
Calibration apparatus for use with sweep rate test equipment as described in claim 1 in which said combining means includes multiplier circuit means for normalizing said second test data signals from said test equipment by multiplying said second test data signals by said reference data signals.
Claim 14
Independent Claim
203 words
A method for normalizing test data produced by sweep rate test equipment which includes the steps of coupling said sweep rate test equipment to a standard device having known parameters, comparing said test data produced by said test equipment while coupled to said standard device to an initial reference data signal representative of the magnitude of said known parameter in a comparator means to produce an output difference signal, integrating said output difference signal to produce a reference data signal representative of the total deviation in magnitude of said test data signal from said initial reference data signal, continuously feeding back said reference data signal to said comparator means for comparison with said test data input signals, accumulating said difference signals in a storage means at the sweep rate of said sweep rate of said test equipment, coupling said sweep rate test data equipment to an equipment having unknown parameters, integrating the stored difference signals in the same order in which they were accumulated, and combining the integrated accumulated difference signals with the test data produced by the test equipment when coupled to an equipment having unknown parameters to produce output test data signals normalized to said unknown parameters of said standard device.
Claim 15
Independent Claim
203 words
A method for normalizing test data produced by sweep rate test equipment which includes the steps of coupling said sweep rate test equipment to a standard device having known parameters, comparing said test data produced by said test equipment while coupled to said standard device to an initial reference data signal representative of the magnitude of said known parameter in a comparator means to produce an output difference signal, integrating said output difference signal to produce a reference data signal representative of the total deviation in magnitude of said test data signal from said initial reference data signal, continuously feeding back said reference data signal to said comparator means for comparison with said test data input signals, accumulating said difference signals in a storage means at the sweep rate of said sweep rate of said test equipment, coupling said sweep rate test data equipment to an equipment having unknown parameters, integrating the stored difference signals in the same order in which they were accumulated, and combining the integrated accumulated difference signals with the test data produced by the test equipment when coupled to an equipment having unknown parameters to produce output test data signals normalized to said unknown parameters of said standard device.
Claim 16
Dependent Claim
94 words
The method for normalizing test data produced by sweep rate test equipment as described in claim 13 which further includes the steps of comparing the sweep rate of the test equipment with an initial reference sweep signal in a comparator means to produce a sweep difference signal, generating an output pulse each time the difference signal exceeds a preset threshold, integrating said output pulse to produce a reference sweep data signal, and feeding back said reference sweep data signal to said sweep comparator means for comparison with said sweep rate of said test equipment.
Claim 17
Dependent Claim
61 words
The method for normalizing test data produced by sweep rate test equipment as described in claim 13 which also includes the step of producing an output signal from said storage means when said storage means is fully loaded, and applying an inhibit signal to said pulse generator means which stops the generation of said pulse output signals thereby inhibiting continuous operation.
Claim 18
Dependent Claim
52 words
The method for normalizing test data produced by sweep rate test equipment as described in claim 13 which includes the steps of inhibiting the generation of sweep output pulses at any specific time, and continuously producing a constant value of integrated accumulated difference signals to be combined with said test data signals.
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) | 1976-12-03 | 1977-06-04 | 1977-12-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-12-03 | 1981-06-04 | 1981-12-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-12-03 | 1985-06-04 | 1985-12-04 | $7700.00 | Window Closed / Lapsed |