US3742389A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Voltage to frequency converter having dual standard charge dispensers
Assignee: VIDAR CORP
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Filing: 1971-06-23
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Granted: 1973-06-26
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Expires: 1991-06-23
Abstract
Abstract A voltage to frequency converter having a pair of standard charge dispensers each generating a ramp function, the ramp function being utilized in an AND-OR invert gate to provide a free mode of operation.
Inventors
- 👤 G Henrickson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 21:56
CPC Classifications
H; H03; H03K; H03K7/00; H03K7/06
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
162 words
A voltage to frequency converter comprising: an integrating network connected to receive an input signal; bistable means responsive to the voltage level of said integrating network repeatedly exceeding a predetermined value for successively changing from one state to another; two standard charge dispensing means coupled to said bistable means and said integrating network and responsive to each of said successive changes of state to alternately draw from said integrating network a standard charge, each of said charge dispensing means including means for generating a stable ramp function signal; means for feeding back at least a fraction of said ramp function signals to said bistable means, said bistable means including coincidence means responsive to said feedback ramp function signal exceeding a predetermined level concurrent with said voltage level exceeding said predetermined value for switching said bistable means from one state to the other, said switching occurring at a rate determined by said ramp function if said voltage level continuously exceeds said predetermined level.
Claim 2
Dependent Claim
162 words
A voltage to frequency converter comprising: an integrating network connected to receive an input signal; bistable means responsive to the voltage level of said integrating network repeatedly exceeding a predetermined value for successively changing from one state to another; two standard charge dispensing means coupled to said bistable means and said integrating network and responsive to each of said successive changes of state to alternately draw from said integrating network a standard charge, each of said charge dispensing means including means for generating a stable ramp function signal; means for feeding back at least a fraction of said ramp function signals to said bistable means, said bistable means including coincidence means responsive to said feedback ramp function signal exceeding a predetermined level concurrent with said voltage level exceeding said predetermined value for switching said bistable means from one state to the other, said switching occurring at a rate determined by said ramp function if said voltage level continuously exceeds said predetermined level.
Claim 3
Dependent Claim
47 words
A voltage to frequency converter as in claim 1 where said ramp function signals of said two charge dispensing means are complementary and where said bistable means includes two coincidence means each of said complementary ramp function signals being respectively coupled to one of said coincidence means.
Claim 4
Dependent Claim
41 words
A voltage to frequency converter as in claim 1 where each of said means for generating said stable ramp function includes precision capacitor means and means for clamping the voltage swing across said precision capacitor means between two predetermined voltage levels.
Claim 5
Dependent Claim
25 words
A voltage to frequency converter as in claim 3 where one of said two predetermined voltage levels are a reference voltage and common ground respectively.
Claim 6
Dependent Claim
29 words
A voltage to frequency converter as in claim 1 wherE said bistable means includes a comparator for establishing said predetermined value of said voltage level of said integrating network.
Claim 7
Dependent Claim
39 words
A voltage to frequency converter as in claim 1 where said bistable means is a dual two-wide two-input AND-OR invert gate with complementary outputs cross connected to respective inputs to provide latching for bistable operation of said bistable 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) | 1976-06-25 | 1976-12-25 | 1977-06-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-25 | 1980-12-25 | 1981-06-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-25 | 1984-12-25 | 1985-06-26 | $7700.00 | Window Closed / Lapsed |