US4772870A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Power line communication system
Assignee: SOPHISTICATED POWERLINE SYSTEMS Inc
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Filing: 1986-11-20
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Granted: 1988-09-20
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Expires: 2006-11-20
Abstract
Abstract A low-level, low-power radio frequency (RF) communications system designed to operate as a point-to-point power line communications sytem (PLC) utilizing frequencies from 50 to 600 MegaHertz (MHz) superimposed onto the AC power signal in a building.
Inventors
- 👤 Ronald R. Reyes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 01:57
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/10; H04N7/108; H04B; H04B3/00; H04B3/54; H04H; H04H20/00; H04H20/65; H04H20/76; H04H20/84; H04B2203/00; H04B2203/54; H04B2203/5429; H04B2203/545; H04B2203/5454; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
88 words
A circuit for power wiring transmission of a very high frequency signal comprising a transmitter to superimpose the signal on a power line, a receiver to receive the very high frequency signal on the power line and to separate said very high frequency signal from the power component of the signal, and to provide said very high frequency signal as an output signal, said transmitter including a multi-stage amplifier, the final stage of said multi-stage amplifier being a highly stable overrated hybrid amplifier with a wideband frequency response.
Claim 2
Dependent Claim
88 words
A circuit for power wiring transmission of a very high frequency signal comprising a transmitter to superimpose the signal on a power line, a receiver to receive the very high frequency signal on the power line and to separate said very high frequency signal from the power component of the signal, and to provide said very high frequency signal as an output signal, said transmitter including a multi-stage amplifier, the final stage of said multi-stage amplifier being a highly stable overrated hybrid amplifier with a wideband frequency response.
Claim 3
Dependent Claim
22 words
A circuit as in claim 1 wherein said highly stable overrated hybrid amplifier is the final stage of a multi-stage amplifier circuit.
Claim 4
Dependent Claim
39 words
A circuit as in claim 2 wherein said power line is a three wire power line, the first of said wires being hot, the second of said wires being neutral, and the third of said wires being ground connected.
Claim 5
Dependent Claim
26 words
A circuit as in claim 3 wherein said very high frequency signal is carried on the neutral and hot lines of said three wire power line.
Claim 6
Dependent Claim
23 words
A circuit as in claim 3 wherein said radio frequency radiation radiated by said power line is less than 15 microvolts per meter.
Claim 7
Dependent Claim
17 words
A circuit as in claim 5 wherein said multi-stage amplifier is a three stage cascade type amplifier.
Claim 8
Dependent Claim
17 words
A circuit as in claim 1 wherein said receiver includes a low pass AC line RFI/EMI filter.
Claim 9
Dependent Claim
16 words
A circuit as in claim 7 wherein said receiver further includes a line matching transformer network.
Claim 10
Dependent Claim
16 words
A circuit as in claim 8 wherein said power line connections are three wire and grounded.
Claim 11
Dependent Claim
14 words
A circuit as in claim 1 wherein said receiver comprises passive circuitry and components.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-20 | 1992-03-21 | 1992-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-20 | 1996-03-21 | 1996-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-20 | 2000-03-21 | 2000-09-20 | $7700.00 | Window Closed / Lapsed |