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US 2003/0141934 A1Published application
Power supply rejection circuit for an audio amplifier
AssigneeTexas Instruments Incorporated
InventorsKendall V. Castor-Perry, Fred J. Shipley
Life of this patent
Estimating the term…
Abstract
A circuit for power amplification for an audio amplifier that reduces power supply noise amplified to the load. The circuit takes the prior art circuit's existing output coupling cap and power supply decoupling cap and connecting them in series from the power supply to ground. The output of the amplifier is then directly coupled to the load and the other side of the load is connected at the “null point” between the two capacitors.
Claims14
An electronic amplifier circuit comprising:
- a. a power amplifier output stage;
- b. a load with a first connection connected to the output stage;
- and
- c. two capacitors connected in series between a voltage source and ground and the common point of the two capacitors connected to the second terminal of the load.
1 more element
An audio amplifier electronic circuit comprising:
- a. a first and second power amplifier output stages with inputs, each comprising two transistors connected in series with a common point between the two transistors;
- b. a first load with a first connection connected to the common point of the first power amplifier output stage;
- c. a second load with a first connection connected to the common point of the second power amplifier output stage;
- and
- d. two capacitors connected in series between a voltage source and ground and the common point of the two capacitors connected to the second terminal of the first and second load,
2 more elements
An amplifier electronic circuit comprising:
- e. a first and second power amplifier output stages with inputs, each comprising two transistors connected in series with a common point between the two transistors;
- f. a first load with a first connection connected to the common point of the first power amplifier output stage;
- g. a second load with a first connection connected to the common point of the second power amplifier output stage;
- and
- h. two capacitors connected in series between a voltage source and ground and the common point of the two capacitors connected to the second terminal of the first and second load,
2 more elements
Dependencies are inferred from the claim text.