US3769591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency selective pulse receiver
Assignee: GILFILLAN S CORP
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Filing: 1956-11-14
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Granted: 1973-10-30
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Expires: 1976-11-14
Abstract
Abstract 3. In a radiant energy receiver, the combination comprising: a main channel having a pass bend to receive incoming signals; a first band pass filter network also connected to receive incoming signals and having a pass band at the center of said main channel pass band; a second band pass filter network connected to receive incoming signals and having a pass band adjacent that of said first filter network; subtraction means responsive to the output signals of said filter networks for producing a control signal having a first magnitude when the output signal of said first pass band filter network is greater than that of said second band pass filter network and having a second and different magnitude when said second band pass filter network has an output signal magnitude greater than that of said first band pass filter network; and means responsive to said control signal for automatically passing the output of said main channel when said control signal is of said first magnitude and for suppressing the output of said main channel when said control signal is of said second magnitude.
Inventors
- 👤 P Brown
- 👤 D Davis
- 👤 J Gross
- 👤 R Sweet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 20:40
CPC Classifications
G; G01; G01S; G01S7/00; G01S7/02; G01S7/36; H; H03; H03G; H03G3/00; H03G3/20; H03G3/22; H03G3/26
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
299 words
In a system having a main channel for receiving pulsed alternating signals having fundamental frequencies laying in a predetermined pass band of interest, and an auxiliary channel for controlling the output of said main channel, the combination comprising: first, second and third filter networks in said auxiliary channel, said second filter network having a second pass band coextensive with said predetermined pass band, said first filter network having a first pass band below said second pass band, said third filter network having a third pass band above said second pass band, the width of said first pass band being such that an output signal greater than that of said second filter network is passed by said first filter network when signals having fundamental frequencies below said second pass band are received by said system and an output signal less than that of said second filter network is passed by said first filter network when signals having fundamental frequencies within said second pass band are received by said system, the width of said third pass band similarly being such that an output signal greater than that of said second filter network is passed by said third filter network when signals having fundamental frequencies above said second pass band are received by said system and an output signal less than that of said second filter network is passed by said third filter network when signals having frequencies within said second pass band are received by said system, first means responsive to the output signals of said filter networks for producing a control signal when the output of said second filter network is different from either of those of said first and third filter networks, and second means responsive to said control signal for suppressing the output of said second filter network.
Claim 2
Dependent Claim
299 words
In a system having a main channel for receiving pulsed alternating signals having fundamental frequencies laying in a predetermined pass band of interest, and an auxiliary channel for controlling the output of said main channel, the combination comprising: first, second and third filter networks in said auxiliary channel, said second filter network having a second pass band coextensive with said predetermined pass band, said first filter network having a first pass band below said second pass band, said third filter network having a third pass band above said second pass band, the width of said first pass band being such that an output signal greater than that of said second filter network is passed by said first filter network when signals having fundamental frequencies below said second pass band are received by said system and an output signal less than that of said second filter network is passed by said first filter network when signals having fundamental frequencies within said second pass band are received by said system, the width of said third pass band similarly being such that an output signal greater than that of said second filter network is passed by said third filter network when signals having fundamental frequencies above said second pass band are received by said system and an output signal less than that of said second filter network is passed by said third filter network when signals having frequencies within said second pass band are received by said system, first means responsive to the output signals of said filter networks for producing a control signal when the output of said second filter network is different from either of those of said first and third filter networks, and second means responsive to said control signal for suppressing the output of said second filter network.
Claim 3
Dependent Claim
299 words
In a system having a main channel for receiving pulsed alternating signals having fundamental frequencies laying in a predetermined pass band of interest, and an auxiliary channel for controlling the output of said main channel, the combination comprising: first, second and third filter networks in said auxiliary channel, said second filter network having a second pass band coextensive with said predetermined pass band, said first filter network having a first pass band below said second pass band, said third filter network having a third pass band above said second pass band, the width of said first pass band being such that an output signal greater than that of said second filter network is passed by said first filter network when signals having fundamental frequencies below said second pass band are received by said system and an output signal less than that of said second filter network is passed by said first filter network when signals having fundamental frequencies within said second pass band are received by said system, the width of said third pass band similarly being such that an output signal greater than that of said second filter network is passed by said third filter network when signals having fundamental frequencies above said second pass band are received by said system and an output signal less than that of said second filter network is passed by said third filter network when signals having frequencies within said second pass band are received by said system, first means responsive to the output signals of said filter networks for producing a control signal when the output of said second filter network is different from either of those of said first and third filter networks, and second means responsive to said control signal for suppressing the output of said second filter network.
Claim 4
Dependent Claim
299 words
In a system having a main channel for receiving pulsed alternating signals having fundamental frequencies laying in a predetermined pass band of interest, and an auxiliary channel for controlling the output of said main channel, the combination comprising: first, second and third filter networks in said auxiliary channel, said second filter network having a second pass band coextensive with said predetermined pass band, said first filter network having a first pass band below said second pass band, said third filter network having a third pass band above said second pass band, the width of said first pass band being such that an output signal greater than that of said second filter network is passed by said first filter network when signals having fundamental frequencies below said second pass band are received by said system and an output signal less than that of said second filter network is passed by said first filter network when signals having fundamental frequencies within said second pass band are received by said system, the width of said third pass band similarly being such that an output signal greater than that of said second filter network is passed by said third filter network when signals having fundamental frequencies above said second pass band are received by said system and an output signal less than that of said second filter network is passed by said third filter network when signals having frequencies within said second pass band are received by said system, first means responsive to the output signals of said filter networks for producing a control signal when the output of said second filter network is different from either of those of said first and third filter networks, and second means responsive to said control signal for suppressing the output of said second filter network.
Claim 5
Dependent Claim
33 words
The invention as defined in claim 1, wherein said first means to produce a control signal includes first, second and third peak detectors connected respectively from said first, second and third filter networks.
Claim 6
Dependent Claim
188 words
In a radiant energy receiver, the combination comprising: a main channel having a pass band to receive incoming signals; a first band pass filter network also connected to receive incoming signals and having a pass band at the center of said main channel pass band; a second band pass filter network connected to receive incoming signals and having a pass band adjacent that of said first filter network; subtraction means responsive to the output signals of said filter networks for producing a control signal having a first magnitude when the output signal of said first pass band filter network is greater than that of said second band pass filter network, said control signal having a second and different magnitude when said second band pass filter network has an output signal magnitude greater than that of said first band pass filter network; and means responsive to said control signal for automatically passing the output of said main channel when said control signal is of said first magnitude and for reducing the output signal magnitude of said main channel to zero when said control signal is of said second magnitude.
Claim 7
Dependent Claim
188 words
In a radiant energy receiver, the combination comprising: a main channel having a pass band to receive incoming signals; a first band pass filter network also connected to receive incoming signals and having a pass band at the center of said main channel pass band; a second band pass filter network connected to receive incoming signals and having a pass band adjacent that of said first filter network; subtraction means responsive to the output signals of said filter networks for producing a control signal having a first magnitude when the output signal of said first pass band filter network is greater than that of said second band pass filter network, said control signal having a second and different magnitude when said second band pass filter network has an output signal magnitude greater than that of said first band pass filter network; and means responsive to said control signal for automatically passing the output of said main channel when said control signal is of said first magnitude and for reducing the output signal magnitude of said main channel to zero when said control signal is of said second magnitude.
Claim 8
Dependent Claim
190 words
In a radiant energy receiver, the combination comprising: a main channel having a band width sufficiently large to receive radar pulses; a first band pass filter network also connected to receive said radar pulses and having a pass band at the center of said main channel pass band; a second band pass filter network connected to receive said radar pulses having a pass band adjacent that of said first filter network; subtraction means responsive to the output signals of said filter networks for producing a control signal having a first magnitude when the output signal of said first pass band filter network is greater than that of said second band pass filter network, said control signal having a second and different magnitude when said second band pass filter network has an output signal magnitude greater than that of said first band pass filter network; and means responsive to said control signal for automatically passing the output of said main channel when said control signal is of said first magnitude and for reDucing the output signal magnitude of said main channel to zero when said control signal is of said magnitude.
Claim 9
Dependent Claim
190 words
In a radiant energy receiver, the combination comprising: a main channel having a band width sufficiently large to receive radar pulses; a first band pass filter network also connected to receive said radar pulses and having a pass band at the center of said main channel pass band; a second band pass filter network connected to receive said radar pulses having a pass band adjacent that of said first filter network; subtraction means responsive to the output signals of said filter networks for producing a control signal having a first magnitude when the output signal of said first pass band filter network is greater than that of said second band pass filter network, said control signal having a second and different magnitude when said second band pass filter network has an output signal magnitude greater than that of said first band pass filter network; and means responsive to said control signal for automatically passing the output of said main channel when said control signal is of said first magnitude and for reDucing the output signal magnitude of said main channel to zero when said control signal is of said magnitude.
Claim 10
Dependent Claim
193 words
In a radiant energy receiver, the combination comprising: a main channel having a band width sufficiently large to receive radar pulses; a first band pass filter network also connected to receive said radar pulses and having a pass band at the center of said main channel pass band; a second band pass filter network connected to receive said radar pulses having a pass band adjacent that of said first filter network; subtraction means responsive to the output signals of said filter networks for producing a control signal having a first magnitude when the output signal of said first pass band filter network is greater than that of said second band pass filter network and having a second and different magnitude when said second band pass filter network has an output signal magnitude greater than that of said first band pass filter network; and instantaneous automatic gain control means responsive to said control signal for automatically passing the output of said main channel when said control signal is of said first magnitude and for reducing the output signal magnitude of said main channel to zero when said control signal is of said second magnitude.
Claim 11
Dependent Claim
193 words
In a radiant energy receiver, the combination comprising: a main channel having a band width sufficiently large to receive radar pulses; a first band pass filter network also connected to receive said radar pulses and having a pass band at the center of said main channel pass band; a second band pass filter network connected to receive said radar pulses having a pass band adjacent that of said first filter network; subtraction means responsive to the output signals of said filter networks for producing a control signal having a first magnitude when the output signal of said first pass band filter network is greater than that of said second band pass filter network and having a second and different magnitude when said second band pass filter network has an output signal magnitude greater than that of said first band pass filter network; and instantaneous automatic gain control means responsive to said control signal for automatically passing the output of said main channel when said control signal is of said first magnitude and for reducing the output signal magnitude of said main channel to zero when said control signal is of said second magnitude.
Claim 12
Dependent Claim
213 words
In a radiant energy receiver, the combination comprising: a main channel having a pass band to receive incoming signals; a first band pass filter network also connected to receive said incoming signals and having a pass band at the center of said main channel pass band; a second band pass filter network connected to receive incoming signals and having a pass band adjacent that of said first filter network below it; a third band pass filter network connected to receive incoming signals and having a pass band adjacent that of said first filter network above it; subtraction means responsive to the output signals of said filter networks for producing a control signal having a first magnitude when at least one of the output signals of said second and third filter networks is greater than that of said first filter network and having a second and different magnitude when said first filter network has an output signal magnitude greater than both of those of said second and third filter networks; and means responsive to said control signal for automatically passing the output of said main channel when said control signal is of said second magnitude and for automatically supressing the output of said main channel when said control signal is of said first magnitude.
Claim 13
Dependent Claim
213 words
In a radiant energy receiver, the combination comprising: a main channel having a pass band to receive incoming signals; a first band pass filter network also connected to receive said incoming signals and having a pass band at the center of said main channel pass band; a second band pass filter network connected to receive incoming signals and having a pass band adjacent that of said first filter network below it; a third band pass filter network connected to receive incoming signals and having a pass band adjacent that of said first filter network above it; subtraction means responsive to the output signals of said filter networks for producing a control signal having a first magnitude when at least one of the output signals of said second and third filter networks is greater than that of said first filter network and having a second and different magnitude when said first filter network has an output signal magnitude greater than both of those of said second and third filter networks; and means responsive to said control signal for automatically passing the output of said main channel when said control signal is of said second magnitude and for automatically supressing the output of said main channel when said control signal is of said first magnitude.
Claim 14
Dependent Claim
214 words
In a radiant energy receiver, the combination comprising: a main channel having a pass band to receive radar pulses; a first band pass filter network also connected to receive said radar pulses and having a pass band at the center of said main channel pass band; a second band pass filter network connected to receive said radar pulses and having a pass band adjacent that of said first filter network below it; a third band pass filter network connected to receive said radar pulses and having a pass band adjacent that of said first filter network above it; subtraction means responsive to the output signals of said filter networks for producing a control signal having a first magnitude when at least one of the output signals of said second and third filter networks is greater than that of said first filter network and having a second and different magnitude when said first filter network has an output signal magnitude greater than both of those said second and third filter networks; and means responsive to said control signal for automatically passing the output of said main channel when said control signal is of said second magnitude and for automatically suppressing the output of said main channel when said control signal is of said first magnitude.
Claim 15
Dependent Claim
214 words
In a radiant energy receiver, the combination comprising: a main channel having a pass band to receive radar pulses; a first band pass filter network also connected to receive said radar pulses and having a pass band at the center of said main channel pass band; a second band pass filter network connected to receive said radar pulses and having a pass band adjacent that of said first filter network below it; a third band pass filter network connected to receive said radar pulses and having a pass band adjacent that of said first filter network above it; subtraction means responsive to the output signals of said filter networks for producing a control signal having a first magnitude when at least one of the output signals of said second and third filter networks is greater than that of said first filter network and having a second and different magnitude when said first filter network has an output signal magnitude greater than both of those said second and third filter networks; and means responsive to said control signal for automatically passing the output of said main channel when said control signal is of said second magnitude and for automatically suppressing the output of said main channel when said control signal is of said first magnitude.
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) | 1976-10-29 | 1977-04-30 | 1977-10-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-29 | 1981-04-30 | 1981-10-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-29 | 1985-04-30 | 1985-10-30 | $7700.00 | Window Closed / Lapsed |