Change-over divider for use in satellite broadcast receiving system

• US 5,565,805 A
• Filed: 08/10/1995
• Issued: 10/15/1996
• Est. Priority Date: 07/04/1991
• Status: Expired due to Term

• Current Assignee: Sony Corporation (Sony Group Corp.)
• Original Assignee: Sony Corporation (Sony Group Corp.)
• Inventors: Yuzawa, Keiji, Nakagawa, Yutaka, Fukuzawa, Keiji, Kajiwara, Tadashi
• Primary Examiner(s): Callahan, Timothy P.
• Assistant Examiner(s): Wells, Kenneth B.
• Application Number:
  US08/513,576
• Time in Patent Office: 432 Days
• Field of Search: 328/152, 328/153, 328/154, 328/103, 328/104, 328/105, 328/187, 328/188, 307/241, 307/242, 307/243, 307/244, 358/188, 358/189, 358/190, 358/86, 455/3.2, 455/3.3, 455/4.2, 455/6.1, 455/6.2, 455/9, 455/3.1, 455/132, 327/403, 327/407, 327/99, 370/53, 370/112
• US Class Current: 327/99
• CPC Class Codes: H04H 20/63 to plural spots in a confined site, e.g. MATV [Master Antenna Television]
• CPC Class Codes: H04H 20/74 of satellite networks
• CPC Class Codes: H04H 20/76 Wired systems
• CPC Class Codes: H04H 40/90 specially adapted for satellite broadcast receiving

Abstract

A satellite broadcast receiving system is disclosed, in which when each receiver transmits a 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.

Claims

1. A change-over divider for selecting at least one of a plurality of input signals, comprising:

a plurality of input terminals respectively receiving said plurality of input signals;

a plurality of selector switches each switch having a plurality of inputs respectively connected to receive said plurality of input signals and each having an output selected from said plurality of inputs;

a plurality of input/output terminals connected respectively to said outputs of said plurality of selector switches and for receiving respective coded control pulses and power supply signals from respective external sources;

control pulse detection means connected to said plurality of input/output terminals for detecting said coded control pulses input through at least one of said plurality of input/output terminals; and

a microcomputer connected to said plurality of selector switches and said control pulse detection means, said microcomputer decoding said control pulse and outputting a change-over control signal to one of said plurality of selector switches which corresponds to said one of said plurality of input/output terminals in response to said control pulse as decoded,

said one of said plurality of switches independently selecting one of said plurality of input signal in response to said change-over control signal supplied by said microcomputer.

2. A change-over divider as claimed in claim 1, wherein said control pulse detection means further comprises:

control pulse extraction means for separating said said control pulses from said power supply signals supplied therewith through said corresponding one of said plurality of input/output terminals.