EP0521732A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Antenna system for receiving broadcast or communication signals from satellite
Assignee: Sony Corp
•
Filing: 1992-07-03
•
Granted: —
•
Expires: 2012-07-03
Abstract
Abstract A satellite broadcast receiving system is disclosed, in which when each receiver transmits control pulse to a change-over divider via a signal cable, the change-over divider selects a desired broadcast signal in response to the control pulse, which is led to its output terminal, then transmitted to each receiver via the signal cable.
Inventors
- 👤 Yutaka Nakagawa
- 👤 Tadashi Kajiwara
- 👤 Keiji Fukuzawa
- 👤 Keiji Yuzawa
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 08:00
CPC Classifications
H; H04; H04H; H04H40/00; H04H40/18; H04H40/27; H04H40/90; H04H20/00; H04H20/53; H04H20/61; H04H20/63; H04H20/65; H04H20/71; H04H20/74; H04H20/76
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
122 words
A system for receiving broadcast and communication signals, comprising: a plurality of antennas (1,2,3,25,26) disposed to receive the broadcast and communication signals and a plurality of receivers (17-20,38-41) for receiving the signals commonly from the antennas (1-3,25,26), characterized by:- a change-over divider (6) connected to said plurality of antennas (1-3,25,26) and having a plurality of output terminals (t₆-t₉), said change-over divider (6) separately outputting a predetermined one of the broadcast and communication signals to said plurality of output terminals (t₆-t₉), respectively; and plurality of receivers (17-20,38-41) being connected to said plurality of output terminals (t₆-t₉) of said change-over divider (6), and adapted to provide a control pulse to said change-over divider (6) for selecting one of said plurality of antennas (1-3,25,26), respectively.
Claim 2
Dependent Claim
23 words
A system as claimed in claim 1, wherein said plurality of antennas (1-3) are of the type capable of receiving waves from satellites.
Claim 3
Dependent Claim
35 words
A system as claimed in claim 1 or 2, further comprising: a plurality of converters (4,7,10) disposed to correspond to said plurality of antennas (1,2,3), and for converting received frequency into a predetermined frequency, respectively.
Claim 4
Dependent Claim
30 words
A system as claimed in claim 1, 2 or 3 wherein said plurality of receivers (17-20,38-41) are adapted to provide DC power voltage to said plurality of converters (4,7,10), respectively.
Claim 5
Dependent Claim
44 words
A system as claimed in claim 1, 2, 3 or 4 further comprising: another antenna (25,26) without converter disposed to receive another signal; and another receiver connected to said change-over divider (6), said another receiver providing no control pulse and no DC power voltage.
Claim 6
Dependent Claim
128 words
A change-over divider for selecting signals, comprising: a plurality of input terminals (t₁-t₅,t₁₀); a plurality of switches (SW₁-SW₄) connected to said plurality of input terminals (t₁-t₁₀); a plurality of output terminals (t₆-t₉) connected to outputs of said plurality of switches (SW₁-SW₄); control pulse detection circuit means (23) connected to said plurality of output terminals (t₆-t₉) for detecting a control pulse; and a microcomputer (24) connected to said plurality of switches (SW₁-SW₄) and said control pulse detection circuit means (23) for decoding said control pulse and outputting a change-over control signal to said plurality of switches (SW₁-SW₄) in response to said control pulse as decoded whereby said plurality of switches (SW₁-SW₄) select a predetermined one of the signals in response to said change-over control signal of said microcomputer (24).
Claim 7
Dependent Claim
23 words
A change-over divider as claimed in claim 6, further comprising: separator circuit means (21) for separating said control pulse from DC power voltage.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
Maintenance schedule is calculated for granted US utility patents.