US 6,639,984 B1 · Feeder circuit

Abstract

The feeder circuit to which the present invention pertains comprises means for regulating which serves to feed an electric current to a positive output terminal and a negative output terminal; means for feeding electric current which serves to feed an electric current to the means for regulating; means for regulator control which serves to control the electric current output from the means for regulating; a first resistance located between the negative terminal of the means for feeding electric current and the positive output terminal; and a second resistance located between the positive terminal of the means for feeding electric current and the negative output terminal. The provision of the first and second resistances allows the median value of the potential at the positive output terminal and the potential at the negative output terminal to be controlled in such a manner as to ensure that it tallies with the median value of the potential at the positive terminal of the means for feeding electric current and the potential at the negative terminal thereof, while also absorbing any imbalance between the current at the positive output terminal and the current at the negative output terminal.

Claims15

Dependent claims

A feeder circuit comprising:

a switching regulator that has secondary current input and output terminals and that controls a value of a secondary current in accordance with a value of a primary current;
a first power supply that has a positive terminal and negative terminal and that supplies said primary current to said switching regulator;
a regulator controller that controls the value of said primary current flowing in said switching regulator;
a positive output terminal that is connected to said secondary current output terminal of said switching regulator;
a negative output terminal that is connected to said secondary current input terminal of said switching regulator;
a first resistor arranged between said positive output terminal and said negative terminal of said first power supply;
and
a second resistor located between said negative output terminal and said positive terminal of said first power supply.

5 more elements

A feeder circuit comprising:

a switching regulator having secondary current input and output terminals and that controls a value of a secondary current in accordance with a value of a primary current;
a first power supply having a positive terminal and a negative terminal and that supplies said primary current to said switching regulator;
a second power supply having a positive terminal and a negative terminal, in which said negative terminal is connected to said positive terminal of said first power supply;
a regulator controller that controls the value of said primary current flowing in said switching regulator;
a positive output terminal that is connected to said secondary current output terminal of said switching regulator;
a negative output terminal that is connected to said secondary current input terminal of said switching regulator;
a first resistor having first and second terminals and that is located between said secondary current output terminal and said positive output terminal;
a second resistor that is located between said secondary current input terminal and said negative output terminal;
a first transistor having one terminal connected to one terminal of said first resistor, and a second terminal and a control terminal connected to said negative terminal of said first power supply via a first direct-current power source;
a second transistor having one terminal connected to said second terminal of said first resistor via a third resistor, a second terminal and a control terminal connected to a terminal of said first direct-current power source;
a first current mirror circuit having first and second current input terminals, the first current input terminal being connected to said second terminal of said second transistor, and having two current output terminals connected to said negative terminal of said first power supply;
a third transistor having one terminal connected a terminal of said second resistor, and a second terminal and control terminal connected to said positive terminal of said second power supply via a second direct-current power source;
a fourth transistor having one terminal connected to said second terminal of said first resistor via a fourth resistor, a second terminal and a control terminal connected to one terminal of said second direct-current power source;
a second current mirror circuit having two current output terminals, a first current output terminal being connected to said second current input terminal of said first current mirror circuit and said second terminal of said fourth transistor, and two current input terminals connected to said positive terminal of said second power supply;
and
a fifth resistor arranged between a second current output terminal of said second current mirror circuit and said positive terminal of said first power supply;
wherein said regulator controller controls the value of said primary current according to an electric potential of said second current output terminal of said second current mirror circuit.

14 more elements

A feeder circuit comprising:

a switching regulator having secondary current input and output terminals and that controls a value of a secondary current in accordance with a value of a primary current;
a first power supply having a positive terminal and a negative terminal and that supplies said primary current to said switching regulator;
a second power supply having a positive terminal and a negative terminal, in which said negative terminal is connected to said positive terminal of said first power supply;
a regulator controller that controls a value of said primary current flowing in said switching regulator;
a positive output terminal that is connected to said secondary current output terminal of said switching regulator;
a negative output terminal that is connected to said secondary current input terminal of said switching regulator;
a first resistor having first and second terminals and that is coupled between said secondary current input terminal and said negative output terminal;
a first current mirror circuit that has four transistors, wherein each current input terminal is connected to said positive terminal of said second power supply;
a first transistor having one terminal connected to said first terminal of said first resistor, and a second terminal and a control terminal connected to a first current output terminal of said first current mirror circuit;
a second transistor having one terminal connected to said second terminal of said first resistor via a second resistor, a second terminal connected to a second current output terminal of said first current mirror circuit, and a control terminal connected to a first current output terminal of said first current mirror circuit;
a second current mirror circuit having one current input terminal connected to a third current output terminal of said first current mirror circuit, a second current input terminal connected to said positive output terminal, and two current output terminals connected to said negative terminal of said first power supply;
and
a third resistor that is coupled between a fourth current output terminal of said first current mirror circuit and said positive terminal of said first power supply;
wherein said regulator controller controls the value of said primary current according to an electric potential of said fourth current output terminal of said first current mirror circuit.

11 more elements

Dependencies are inferred from the claim text.

Feeder circuit

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Feeder circuit

Life of this patent

Abstract

Claims15