Audio amplifier power supply rail-balancing and anti-pumping system
AssigneeCrestron Electronics, Inc.
InventorRobert Buono
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Abstract
A rail balancing circuit is described herein for use with a power supply, the RBC comprising: a circuit adapted to respond to over-voltage and under-voltage conditions in the power supply that comprises a positive rail voltage source and a negative rail voltage source, such that any deviation from a balanced condition between the positive rail voltage source and the negative rail voltage source is substantially instantaneously corrected to bring both the positive and negative rail voltage sources back to the balanced condition.
Claims25
A rail balancing circuit (RBC) for use with a power supply, the RBC comprising:
- a circuit adapted to respond to over-voltage and under-voltage conditions in the power supply that comprises a positive rail voltage source and a negative rail voltage source, such that any deviation from a balanced condition between the positive rail voltage source and the negative rail voltage source is substantially instantaneously corrected to bring both the positive and negative rail voltage sources back to the balanced condition.
A method for operating a rail balancing circuit (RBC) for use in maintaining a balanced condition in a power supply with equal but opposite polarity outputs, the method comprising:
- substantially continuously switching a positive rail voltage source and a negative rail voltage source;
- and
- when the positive rail voltage source has experienced an over-voltage condition and the negative rail voltage source has experienced an under-voltage condition, turning on a first pair of transistors adapted to balance the positive and negative rail voltage sources when the over-voltage condition exists on the positive rail voltage source and the under-voltage condition occurs on the negative rail voltage source, and
- when the negative rail voltage source has experienced an over-voltage condition and the positive rail voltage source has experienced an under-voltage condition, turning on a second pair of transistors adapted to balance the positive and negative rail voltage sources when the over-voltage condition exists on the negative rail voltage source and the under-voltage condition occurs on the positive rail voltage source.
Dependencies are inferred from the claim text.