Information separation device

• US 5,153,448 A
• Filed: 01/16/1990
• Issued: 10/06/1992
• Est. Priority Date: 01/27/1989
• Status: Expired due to Fees

• Current Assignee: Siemens AG
• Original Assignee: Siemens AG
• Inventors: Zierhut, Hermann
• Primary Examiner(s): Skudy, R.
• Assistant Examiner(s): Dougherty, Thomas M.
• Application Number:
  US07/465,946
• Time in Patent Office: 994 Days
• Field of Search: 340/310 R, 340/310 CP, 340/310 A, 307/1, 307/2, 307/4
• US Class Current: 307/1
• CPC Class Codes: H04B 2203/5445 Local network
• CPC Class Codes: H04B 2203/545 Audio/video application, e.g. interphone
• CPC Class Codes: H04B 2203/547 via DC power distribution
• CPC Class Codes: H04B 2203/5483 using coupling circuits
• CPC Class Codes: H04B 3/548 the power on the line being DC arrangements for feeding power H04L12/10; extracting feeding power from signals H04L25/02
• CPC Class Codes: H04L 25/0266 Arrangements for providing Galvanic isolation, e.g. by means of magnetic or capacitive coupling

Abstract

An information separation device that having a transformer operating as a separating filter to separate alternating voltage information and transmitted direct current power. The transformer has at least one winding on a first side coupled to the dc power. A capacitor is coupled to this winding, at whose ends direct current power is made available. The transformer has one winding on an information processing side. First and second valves are arranged in a transmitting branch parallel to the capacitor, the second winding being coupled at its first end between the first and second valves. Third and fourth valves are arranged in a branch parallel to the capacitor, the second winding being coupled in series at its first and second ends between the third and fourth valves in phase opposition to the first and second valves.

Claims

1. An information separation device comprising:

a transformer which separates transmitted alternating voltage information rom direct current power, the transformer having a first side and a second side, said first side having at least one winding and a capacitor coupled in series to said winding, said capacitor blocking direct current;

said second side of said transformer having a winding with first and second ends and processing received separated information;

first and second transistors arranged in a transmitting branch parallel to said capacitor, said winding of said second side of said transformer being coupled at its first end at a point between said first and second transistors;

first and second diodes arranged in a branch parallel to said capacitor, said winding of said second side of said transformer being coupled in series at its first and second ends between said first and second diodes in phase opposition to the first and second transistors.

2. The information separation device of claim 1, wherein one of said first and second transistors is controllable to become conductive for standby receiving during breaks in transmission, and the other of said first and second transistors is controllable to be kept in a blocking state, and further comprising means for picking off a receiving signal from the first end of said winding of said second side of said transformer.

3. An information separation device comprising:

a means for separating transmitted alternating voltage from direct current, said means for separating has a first side and a second side;

at least one winding, located at said first side of said means for separating;

a means for blocking direct current, connected in series with said winding;

a means for storing power, located at said second side of said means for separating and having a first and a second terminal;

a first means for switching, having an on state providing a positive voltage at said first terminal of said means for storing power and a negative voltage at said second terminal of said means for storing power;

a second means for switching, having an on state providing a positive voltage at said second terminal of said means for storing power and a negative voltage to said first terminal of said means for storing power;

wherein said fist means for switching is on and said second means for switching is off during a break in a transmission and said first means for switching if off and said second means for switching is on when a positive transmission signal is present.

4. An information storage device according to claim 3 wherein

said means for separating comprises a transformer.

5. An information storage device according to claim 3 wherein

said means for storing power is a winding.

6. An information storage device according to claim 5 wherein

said means for blocking direct current is a capacitor.

7. An information storage device according to claim 5 wherein

said first means for switching includes diodes.

8. An information storage device according to claim 5 wherein

said second means for switching includes transistors.