Method for lowering power loss and circuit
AssigneeSemiconductor Components Industries, LLC
InventorsBasso Christophe, Jean-Paul Louvel
Life of this patent
Estimating the term…
Abstract
A method and circuit for suppressing a bias current and decreasing power consumption. A current suppression circuit is coupled to a circuit element, which is capable of conducting the bias current. Coupling the current suppression circuit to the circuit element forms a node. In one operating mode, the current suppression circuit applies a voltage to the node in response to a heavy load. In another operating mode, the current suppression circuit lowers the voltage at the node in response to a light load or no load. Lowering the voltage at the node decreases the flow of bias current through the circuit element thereby lowering power loss.
Claims20
A method for changing power consumption by a circuit, comprising:
- injecting a first current into a first node in response to a first voltage at a second node and a second current drawn from a third node, wherein the first current includes first and second sub-currents;
- and
- decreasing the first current in response to the second current drawn from the third node decreasing.
A method for changing power consumption by a circuit, comprising:
- operating the circuit in a first operating mode by coupling a first load to the circuit and in response to the first load being coupled to the circuit injecting a first current into a first node and generating a first voltage at a second node;
- and
- operating the circuit in a second operating mode by changing the first load coupled to the circuit, wherein changing the first load changes the first voltage to a second voltage at the second node.
A circuit, comprising:
- an input stage having first and second input terminals and an output terminal;
- a control stage having a plurality terminals, a first terminal of the plurality of terminals coupled to the output terminal of the input stage, the control stage including a controller;
- a transformer stage having at least first and second terminals, the first terminal coupled to a second terminal of the plurality of terminals of the control stage;
- and
- an output stage having a terminal coupled to the second terminal of the transformer stage, wherein the output stage further comprises:
- a regulator having a terminal;
- and
- a current suppression stage coupled to the terminal of the regulator.
Dependencies are inferred from the claim text.