发明名称 |
Half-bridge three-level PWM amplifier and audio processing apparatus including the same |
摘要 |
A half-bridge three-level pulse width modulation (PWM) amplifier includes a prescaling unit, a PWM generator configured to convert the input signal to a three-level PWM signal having a first level, a second level and a reference level and an output stage. The prescaling unit scales an input signal according to at least one gain value to provide a scaled signal. The PWM generator varies the width of pulses having the first level and varies the width of pulses having a second level based on the scaled signal. The output stage drives an output node to a level of a first power supply voltage, a second power supply voltage or a third power supply voltage based on the three-level PWM signal. The output node is connected to a load. The magnitude of the at least one gain value compensates for variations of power supply voltages.
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申请公布号 |
US8362832(B2) |
申请公布日期 |
2013.01.29 |
申请号 |
US20100850782 |
申请日期 |
2010.08.05 |
申请人 |
SAMSUNG ELECTRONICS CO., LTD.;KIM BONG-JOO;YEUM WANG-SEUP;LEE YONG-HEE;YOU SEUNG-BIN;SEOK CHUN KYUN |
发明人 |
KIM BONG-JOO;YEUM WANG-SEUP;LEE YONG-HEE;YOU SEUNG-BIN;SEOK CHUN KYUN |
分类号 |
H03F3/38 |
主分类号 |
H03F3/38 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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