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| |  | ||   / _ \\  \ \\ / // | || | ||  | |/ // 
| |/\| ||  / //\ \\  \ \/ //  | || | ||  | ' //  
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|_// \_|| |_||  |_||   \//     \____//   |_|\_\\ 
`-`   `-` `-`   `-`     `       `---`    `-` --`

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Text this: Class D Amplifiers (CDAs) : PWM-in-PWM-out CDA, Filterless Bang-Bang CDA, and high-frequency high-efficiency CDA for Envelope Tracking