Switching amplifier having linear transition totem pole modulation
AssigneeTexas Instruments Incorporated
InventorsYinglai Xia, Yogesh Ramadass
Life of this patent
Estimating the term…
Abstract
In one example, an apparatus comprises a control circuit, a first power stage, and a second power stage. The control circuit has an input, first control outputs, and second control outputs, the control circuit including a modulated signal generator coupled between the input and the first control outputs and an amplifier coupled between the input and the second control outputs. The first power stage has first control inputs and a first power stage output, the first control inputs coupled to the first control outputs. And the second power stage has second control inputs and a second power stage output, the second control inputs coupled to the second control outputs.
Claims23
An apparatus, comprising:
- a control circuit having an input, first control outputs, and second control outputs, the control circuit including a modulated signal generator coupled between the input and the first control outputs and an amplifier coupled between the input and the second control outputs;
- a first power stage having first control inputs and a first power stage output, the first control inputs coupled to the first control outputs;
- and
- a second power stage having second control inputs and a second power stage output, the second control inputs coupled to the second control outputs.
An apparatus comprising:
- a control circuit having an input, first control outputs, and second control outputs, the control circuit including a modulated signal generator coupled between the input and the first control outputs and an amplifier coupled between the input and the second control outputs;
- a first transistor coupled between a power terminal and a first output, the first transistor having a first control terminal coupled to the first control outputs;
- a second transistor coupled between the first output and a reference terminal, the second transistor having a second control terminal coupled to the first control outputs;
- a third transistor coupled between the power terminal and a second output, the third transistor having a third control terminal coupled to the second control outputs;
- and
- a fourth transistor coupled between the second output and the reference terminal, the fourth transistor having a fourth control terminal coupled to the second control outputs.
A method comprising:
- receiving a first signal;
- generating first control signals from the first signal using a modulated signal generator;
- generating second control signals from the first signal using an amplifier;
- generating a second signal by providing the first control signals to a first power stage;
- and
- generating a third signal by providing the second control signals to a second power stage.
Dependencies are inferred from the claim text.