US4843307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage difference measuring equipment
Assignee: Kenwood KK
•
Filing: 1987-04-21
•
Granted: 1989-06-27
•
Expires: 2007-04-21
Abstract
Abstract A peak to peak or two-point voltage difference measuring equipment according to the present invention comprises: a control circuit; a D/A converter for converting the digital data given from the control circuit into the reference analog voltage; a comparator for comparing an input voltage signal with a reference analog voltage; means for gating the output of the comparator for a predetermined time segment interval; and means for holding the output of the gating means and applying to the control circuit.
Inventors
- 👤 Hiroshi Ichijyo
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 13:13
CPC Classifications
G; G01; G01R; G01R19/00; G01R19/25; G01R19/04; G01R19/2506
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
126 words
A measuring circuit of measuring a value of an analog input signal at a selected position, the circuit comprising: means for receiving a periodic analog input signal for a predetermined period; means for generating a digital signal which advances by a predetermined digital value step for every said predetermined period; means for converting said digital signal into an analog reference signal for every said predetermined period; means for comparing the input analog signal with the converted analog reference signal; means for generating a timing acquisition signal in a preselected position for every said predetermined period; and means responsive to said timing acquisition signal for registering the value of the digital signal as a measuring value when the comparison in said comparing means has a specific result.
Claim 2
Dependent Claim
126 words
A measuring circuit of measuring a value of an analog input signal at a selected position, the circuit comprising: means for receiving a periodic analog input signal for a predetermined period; means for generating a digital signal which advances by a predetermined digital value step for every said predetermined period; means for converting said digital signal into an analog reference signal for every said predetermined period; means for comparing the input analog signal with the converted analog reference signal; means for generating a timing acquisition signal in a preselected position for every said predetermined period; and means responsive to said timing acquisition signal for registering the value of the digital signal as a measuring value when the comparison in said comparing means has a specific result.
Claim 3
Dependent Claim
122 words
A measuring circuit according to claim 1, wherein: said digital signal means increases the digital signal by the predetermined digital value step for said every predetermined period, said comparing means includes a comparator means (e.g., 31) for outputting logic "1" when the converted analog reference signal is equal to or larger than the sample input analog signal and otherwise logic "0", and D flip-flop means (e.g., 32, 33) for entering the output of said comparator means as data in response to a timing signal of determining the selected position, and said registering means (e.g., 35) in response to the transition from logic "0" to logic "1" of the output of said D flip-flop means for registering the value of the digital signal.
References Cited (Backward Citations)
US2591738A
Cited
US2880392A
Cited
US3063018A
Cited
US3188455A
Cited
US4271391A
Cited
US4510444A
Cited
US4476432A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-06-26 | 1992-12-26 | 1993-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-06-26 | 1996-12-26 | 1997-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-06-26 | 2000-12-26 | 2001-06-27 | $7700.00 | Window Closed / Lapsed |