Switching mode amplifier operation

摘要

A switching mode amplifier and method. A voltage divider comprising two series connected reactive components produces, on a center line, a fraction of a voltage received on a first line and a second line. The switching structure produce a fraction of the power supply voltage to the first port or the second port by either one of 1) a first configuration that connects the first port to the first input and the second port to the center line, or 2) a second configuration that connects the first port to the center line and the second port to the second input. A controller responds to a sequence of commands to provide the fraction of the voltage by alternating the switching structure between the first configuration and the second configuration.

主权项

1. A switching mode amplifier, comprising:
a power supply input receiving a supply voltage across a first input and a second input; a first capacitor having a respective first terminal fixedly coupled to the first input and a respective second terminal fixedly coupled to a center line; a second capacitor having a respective first terminal fixedly coupled to the center line and a respective second terminal fixedly coupled to the second input; a switching structure configurable to:
selectably couple a first port to one of the first input, the second input, and the center line; andselectably couple a second port to one of the first input, the second input, and the center line; and a controller configured to alternate a direction of electrical current flow through the first capacitor and the second capacitor, the controller configured to:
configure, in response to a first indication to provide a fraction of the supply voltage across the first port and the second port, the switching structure into a first configuration, the first configuration coupling the first port to the first input and coupling the second port to the center line; andconfigure, in response to a subsequent indication to provide the fraction of the supply voltage across the first port and the second port, the switching structure into a second configuration, the second configuration coupling the first port to the center line and coupling the second port to the second input, wherein the subsequent indication occurs after the first indication.