US4387397A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Integrated circuit interface in a vertical sync circuit
Assignee: RCA Licensing Corp
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Filing: 1981-03-17
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Granted: 1983-06-07
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Expires: 2001-03-17
Abstract
Abstract An integrated circuit interface means for use in a television receiver comprises means including an interface terminal which gives an indication of whether the receiver is operating in a standard or nonstandard mode. Standard operating mode occurs during the reception of standard broadcast signals. Non-standard non-broadcast signals cause the receiver to operate in a non-standard mode. The interface means also comprises means coupled to the same interface terminal for providing a signal to the integrated circuit which manually selects the operating mode, thereby allowing the interface terminal to serve the dual function of indicating and selecting the receiver operating mode.
Inventors
- 👤 Wolfgang F. W. Dietz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 14:35
CPC Classifications
H; H04; H04N; H04N5/00; H04N5/04; H04N5/12
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
226 words
In an integrated circuit, for use in a television receiver, incorporating oscillator means; countdown means coupled to said oscillator means for providing a first vertical deflection rate signal; a source of second vertical deflection rate signals; gating means selectively responsive to said first and second vertical deflection rate signals; a source of first and second control signals respectively providing an indication of first and second operating conditions of said receiver; and switching means coupled to said gating means and responsive to said first and second control signals for controlling said gating means for selectively deriving an output of said gating means from said first vertical deflection rate signals in response to said first control signal and from said second vertical deflection rate signals in response to said second control signal; an interface means comprising: means coupled to said source of first and second control signals and including a dual function integrated circuit interface terminal for providing as a first function an output indication at said interface terminal of one of said first and second receiver operating conditions; and means coupled to said switching means and to said interface terminal for providing as a second function an input signal via said interface terminal to said switching means for selectively controlling the operation of said gating means in order to simulate said first and second receiver operating conditions.
Claim 2
Dependent Claim
226 words
In an integrated circuit, for use in a television receiver, incorporating oscillator means; countdown means coupled to said oscillator means for providing a first vertical deflection rate signal; a source of second vertical deflection rate signals; gating means selectively responsive to said first and second vertical deflection rate signals; a source of first and second control signals respectively providing an indication of first and second operating conditions of said receiver; and switching means coupled to said gating means and responsive to said first and second control signals for controlling said gating means for selectively deriving an output of said gating means from said first vertical deflection rate signals in response to said first control signal and from said second vertical deflection rate signals in response to said second control signal; an interface means comprising: means coupled to said source of first and second control signals and including a dual function integrated circuit interface terminal for providing as a first function an output indication at said interface terminal of one of said first and second receiver operating conditions; and means coupled to said switching means and to said interface terminal for providing as a second function an input signal via said interface terminal to said switching means for selectively controlling the operation of said gating means in order to simulate said first and second receiver operating conditions.
Claim 3
Dependent Claim
18 words
The arrangement defined in claim 1, wherein said second vertical deflection rate signals comprise incoming vertical synchronizing pulses.
Claim 4
Dependent Claim
54 words
The arrangement defined in claim 2, wherein said first receiver operating condition represents a condition in which said first vertical deflection rate signals originate from a television broadcast source and said second receiver operating condition represents a condition in which said first vertical deflection rate signals do not originate from a television broadcast source.
References Cited (Backward Citations)
US3688037A
Cited
US3715499A
Cited
US3691297A
Cited
US3751588A
Cited
US3899635A
Cited
US4238769A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-06-06 | 1986-12-06 | 1987-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-06-06 | 1990-12-06 | 1991-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-06-06 | 1994-12-06 | 1995-06-07 | $7700.00 | Window Closed / Lapsed |