US4058810A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stabilized digital PPL radar system
Assignee: Raytheon Co
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Filing: 1976-08-13
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Granted: 1977-11-15
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Expires: 1996-08-13
Abstract
Abstract A radar system having the radar pulse rate controlled directly from an indicator unit. Separate modulator-transmitter-receiver and digital video processor indicator units are provided. A radar trigger pulse is produced by the processor unit in synchronism with the processor clock at a rate determined by the radar range setting. An acknowledge signal is produced in turn by the modulator-transmitter-receiver in accordance with an activating signal in the modulator and fed back to the indicator unit to start video signal digitization and the CRT sweep. Jitter between the start of the radar return signal and the radar sweep are eliminated.
Inventors
- 👤 Joseph E. Bryden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:16
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/04; G01S7/06; G01S7/10; G01S7/12; G01S7/064; A; A61; A61B; A61B17/00; A61B2017/0046; A61B2017/00469
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
123 words
A radar system comprising in combination: timing generator means for initiating production of radar pulses; means for transmitting said radar pulses in response to said initiating means; means for producing an acknowledge signal having fixed time relationship to said transmitted radar pulses; means for receiving returned radar signals; and means for producing a visual display responsive to the received returned radar signals; said timing generator means initiating a sweep gate signal for synchronizing the start of the visual sweep of said display in response to said acknowledge signal, whereby the acknowledge signal has a fixed time relationship with the commencement of each of said transmitted radar pulses to prevent jitter between the start of the visual sweep and returns of said radar pulses.
Claim 2
Dependent Claim
123 words
A radar system comprising in combination: timing generator means for initiating production of radar pulses; means for transmitting said radar pulses in response to said initiating means; means for producing an acknowledge signal having fixed time relationship to said transmitted radar pulses; means for receiving returned radar signals; and means for producing a visual display responsive to the received returned radar signals; said timing generator means initiating a sweep gate signal for synchronizing the start of the visual sweep of said display in response to said acknowledge signal, whereby the acknowledge signal has a fixed time relationship with the commencement of each of said transmitted radar pulses to prevent jitter between the start of the visual sweep and returns of said radar pulses.
Claim 3
Dependent Claim
194 words
A radar system comprising in combination: timing generator means for initiating production of radar pulses; means for transmitting said radar pulses in response to said initiating means; means for producing an acknowledge signal having a fixed time relationship to said transmitted radar pulses; means for receiving returned radar signals and producing video representations of said signals; means for producing a visual display responsive to the received returned radar signals; said timing generator means initiating a sweep gate signal for synchronizing the start of the visual sweep of said display in response to said acknowledge signal, whereby the acknowledge signal has a fixed time relationship with the commencement of each of said transmitted radar pulses to prevent jitter between the start of the visual sweep and returns of said radar pulses; means for storing said digital video representations at least for some of said representations; analog to digital converter means coupled to said generator means for writing said digital video representations from said receiver means into said storing means at a first rate, and said storing means being adapted in response to said timing generator means for reading out said digital video representations at a
Claim 4
Dependent Claim
194 words
A radar system comprising in combination: timing generator means for initiating production of radar pulses; means for transmitting said radar pulses in response to said initiating means; means for producing an acknowledge signal having a fixed time relationship to said transmitted radar pulses; means for receiving returned radar signals and producing video representations of said signals; means for producing a visual display responsive to the received returned radar signals; said timing generator means initiating a sweep gate signal for synchronizing the start of the visual sweep of said display in response to said acknowledge signal, whereby the acknowledge signal has a fixed time relationship with the commencement of each of said transmitted radar pulses to prevent jitter between the start of the visual sweep and returns of said radar pulses; means for storing said digital video representations at least for some of said representations; analog to digital converter means coupled to said generator means for writing said digital video representations from said receiver means into said storing means at a first rate, and said storing means being adapted in response to said timing generator means for reading out said digital video representations at a
Claim 5
Dependent Claim
94 words
A radar system comprising in combination: trigger means for initiating production of transmitted radar pulses; means for transmitting said pulses; means for producing an acknowledge signal having a fixed time relationship to said transmitted radar pulses and directly produced by said transmitted radar pulses; means for receiving returned radar signals; means for producing a display in response to the received return radar signals; and wherein said means for producing an acknowledge signal having a fixed time relationship to said transmitted radar pulses comprises: means for sensing one or more signals of said initiating means.
Claim 6
Dependent Claim
94 words
A radar system comprising in combination: trigger means for initiating production of transmitted radar pulses; means for transmitting said pulses; means for producing an acknowledge signal having a fixed time relationship to said transmitted radar pulses and directly produced by said transmitted radar pulses; means for receiving returned radar signals; means for producing a display in response to the received return radar signals; and wherein said means for producing an acknowledge signal having a fixed time relationship to said transmitted radar pulses comprises: means for sensing one or more signals of said initiating means.
Claim 7
Dependent Claim
101 words
A radar system comprising in combination: trigger means for initiating production of transmitted radar pulses; means for transmitting said pulses; means for producing an acknowledge signal having a fixed time relationship to said transmitted radar pulses and directly produced by said transmitted radar pulses; means for receiving returned radar signals; means for producing a display in response to the received return radar signals; and wherein said means for producing an acknowledge signal having a fixed time relationship to said transmitted radar pulses comprises: means for sensing one or more signals of said initiating means, said initiating means comprising: a modulator tube.
Claim 8
Dependent Claim
101 words
A radar system comprising in combination: trigger means for initiating production of transmitted radar pulses; means for transmitting said pulses; means for producing an acknowledge signal having a fixed time relationship to said transmitted radar pulses and directly produced by said transmitted radar pulses; means for receiving returned radar signals; means for producing a display in response to the received return radar signals; and wherein said means for producing an acknowledge signal having a fixed time relationship to said transmitted radar pulses comprises: means for sensing one or more signals of said initiating means, said initiating means comprising: a modulator tube.
Claim 9
Dependent Claim
115 words
A radar system comprising in combination: trigger means for initiating production of transmitted radar pulses; means for transmitting said pulses; means for producing an acknowledge signal having a fixed time relationship to said transmitted radar pulses and directly produced by said transmitted radar pulses; means for receiving returned radar signals; means for producing a display in response to the received return radar signals; and wherein said means for producing an acknowledge signal having a fixed time relationship to said transmitted radar pulses comprises: means for sensing one or more signals of said initiating means, wherein said initiating means comprises: a modulator tube, and said sensing means comprises: means for sensing cathode current in said tube.
Claim 10
Dependent Claim
115 words
A radar system comprising in combination: trigger means for initiating production of transmitted radar pulses; means for transmitting said pulses; means for producing an acknowledge signal having a fixed time relationship to said transmitted radar pulses and directly produced by said transmitted radar pulses; means for receiving returned radar signals; means for producing a display in response to the received return radar signals; and wherein said means for producing an acknowledge signal having a fixed time relationship to said transmitted radar pulses comprises: means for sensing one or more signals of said initiating means, wherein said initiating means comprises: a modulator tube, and said sensing means comprises: means for sensing cathode current in said tube.
Claim 11
Dependent Claim
101 words
A radar system comprising in combination: trigger means for initiating production of transmitted radar pulses; means for transmitting said pulses; means for producing an acknowledge signal having a fixed time relationship to said transmitted radar pulses and directly produced by said transmitted radar pulses; means for receiving returned radar signals; means for producing a display in response to the received return radar signals; and wherein said means for producing an acknowledge signal having a fixed time relationship to said transmitted radar pulses comprises: means for sensing one or more signals of said initiating means, said initiating means comprising: a solid-state modulator.
Claim 12
Dependent Claim
101 words
A radar system comprising in combination: trigger means for initiating production of transmitted radar pulses; means for transmitting said pulses; means for producing an acknowledge signal having a fixed time relationship to said transmitted radar pulses and directly produced by said transmitted radar pulses; means for receiving returned radar signals; means for producing a display in response to the received return radar signals; and wherein said means for producing an acknowledge signal having a fixed time relationship to said transmitted radar pulses comprises: means for sensing one or more signals of said initiating means, said initiating means comprising: a solid-state modulator.
Claim 13
Dependent Claim
101 words
A radar system comprising in combination: trigger means for initiating production of transmitted radar pulses; means for transmitting said pulses; means for producing an acknowledge signal having a fixed time relationship to said transmitted radar pulses and directly produced by said transmitted radar pulses; means for receiving returned radar signals; means for producing a display in response to the received return radar signals; and wherein said means for producing an acknowledge signal having a fixed time relationship to said transmitted radar pulses comprises: means for sensing one or more signals of said initiating means, said transmitting means comprising: a magnetron tube.
Claim 14
Dependent Claim
101 words
A radar system comprising in combination: trigger means for initiating production of transmitted radar pulses; means for transmitting said pulses; means for producing an acknowledge signal having a fixed time relationship to said transmitted radar pulses and directly produced by said transmitted radar pulses; means for receiving returned radar signals; means for producing a display in response to the received return radar signals; and wherein said means for producing an acknowledge signal having a fixed time relationship to said transmitted radar pulses comprises: means for sensing one or more signals of said initiating means, said transmitting means comprising: a magnetron tube.
Claim 15
Dependent Claim
28 words
The combination of claim 3 further comprising pulse width generator means connected to said initiating means and including variable resistive means for varying the width of said pulses.
References Cited (Backward Citations)
US3780370A
Cited
US3918054A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-11-14 | 1981-05-16 | 1981-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-11-14 | 1985-05-16 | 1985-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-11-14 | 1989-05-16 | 1989-11-15 | $7700.00 | Window Closed / Lapsed |