US3602810A
Expired / Lapsed
US
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Testing system for circuit points that are normally operated in a predetermined sequence
Assignee: Westinghouse Electric Corp
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Filing: 1969-02-07
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Granted: 1971-08-31
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Expires: 1989-02-07
Abstract
Abstract A system for monitoring the operation of a circuit configuration including test circuit points therein is disclosed wherein a test network is utilized including a plurality of impedance elements, such as resistors, coupled between the test circuit points and a load impedance element, such as a resistor, with the output from the load impedance element being sensed by, for example, an oscilloscope. The plurality of impedance elements are selected to have a predetermined relationship with respect to each other, such as being weighted for monitoring a counting operation or having substantially equal values for a sequential operation.
Inventors
- 👤 Frank Di Nicolantonio
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 08:13
CPC Classifications
G; G01; G01R; G01R31/00; G01R31/28; G01R31/317; G01R31/3181; G01R31/3185; G01R31/318522; G01R31/318527; G01R13/00; G01R13/20; G01R13/208; G01R31/319; G01R31/31917; G01R31/31924; G06; G06F; G06F11/00; G06F11/07; G06F11/0703; G06F11/0751; G06F11/0754
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
186 words
The combination comprising: a. a plurality of logic elements disposed in a predetermined manner to perform a selected logic function, each logic element having an output indicative of the logic state of the element, b. a plurality of circuit points each connected to sample the output of a different one of said logic elements, said plurality of circuit points being normally pulsed in a predetermined sequence by their respective associated logic elements, c. a point of reference potential; d. a junction; e. a load impedance connected between said reference point and said junction over the time of said sequence, f. a plurality of impedance elements, each connected between said junction and a different one of said plurality of circuit points over the time of said sequence, whereby said load impedance senses the composite output of said circuit points; and g. means connected to said load impedance for sensing the output across said load impedance developed in response to the composite output of said plurality of circuit points, said output of said load impedance being indicative of whether or not the selected logic function is being performed.
Claim 2
Dependent Claim
186 words
The combination comprising: a. a plurality of logic elements disposed in a predetermined manner to perform a selected logic function, each logic element having an output indicative of the logic state of the element, b. a plurality of circuit points each connected to sample the output of a different one of said logic elements, said plurality of circuit points being normally pulsed in a predetermined sequence by their respective associated logic elements, c. a point of reference potential; d. a junction; e. a load impedance connected between said reference point and said junction over the time of said sequence, f. a plurality of impedance elements, each connected between said junction and a different one of said plurality of circuit points over the time of said sequence, whereby said load impedance senses the composite output of said circuit points; and g. means connected to said load impedance for sensing the output across said load impedance developed in response to the composite output of said plurality of circuit points, said output of said load impedance being indicative of whether or not the selected logic function is being performed.
Claim 3
Dependent Claim
18 words
The combination of claim 1 wherein: said plurality of impedance elements bear a predetermined relationship to each other.
Claim 4
Dependent Claim
20 words
The combination of claim 2 wherein: said predetermined relationship being that said plurality of impedance elements have respectively weighted impedances.
Claim 5
Dependent Claim
21 words
The combination of claim 1 wherein: said predetermined relationship being that said plurality of impedance elements have substantially the same impedance.
Claim 6
Dependent Claim
19 words
The combination of claim 1 wherein said means for sensing in clause g comprises time referenced visual display means.
Claim 7
Dependent Claim
47 words
The combination as in claim 1 wherein each of said plurality of impedance elements is weighted according to the ratio R/2n 1, where n is the sequence number of the impedance and R is the impedance value of the first in sequence impedance element of the plurality.
Claim 8
Dependent Claim
23 words
The combination as in claim 1 wherein said plurality of impedance elements have respectively different impedances weighted in accordance with a desired pattern.
Claim 9
Dependent Claim
20 words
The combination as in claim 1 wherein said means for sensing in clause g is connected directly to said junction.
Claim 10
Dependent Claim
17 words
The combination as in claim 8 wherein said plurality of impedance elements have substantially the same impedance.
Claim 11
Dependent Claim
23 words
The combination as in claim 8 wherein said plurality of impedance elements have respectively different impedances weighted in accordance with a desired pattern.
Claim 12
Dependent Claim
47 words
The combination as in claim 8 wherein each of said plurality of impedance elements is weighted according to the ratio R/2n 1, where n is the sequence number of the impedance and R is the impedance value of the first in sequence impedance element of the plurality.
Claim 13
Dependent Claim
19 words
The combination of claim 8 wherein said means for sensing in clause g comprises time referenced visual display means.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-30 | 1975-03-01 | 1975-08-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-30 | 1979-03-01 | 1979-08-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-30 | 1983-03-01 | 1983-08-31 | $7700.00 | Window Closed / Lapsed |