| 发明名称 | Multi-stage amplifier with pulse width modulation (PWM) noise shaping | ||
| 摘要 | A pulse width modulation (PWM) amplifier includes a first amplifier stage, a second amplifier stage, and a gain module. The first amplifier stage is configured to amplify an analog input signal in the analog and digital domains using a first pulse width modulation (PWM) generator, to provide a first stage output for coupling to a load. The gain module is configured to amplify a quantization error of the first PWM generator by a predetermined gain. The second amplifier stage is configured to spectrally shape and attenuate the amplified quantization error of the first PWM generator using a second PWM generator, to provide a second stage output for coupling to the load. | ||
| 申请公布号 | US9048791(B2) | 申请公布日期 | 2015.06.02 |
| 申请号 | US201213446047 | 申请日期 | 2012.04.13 |
| 申请人 | Taiwan Semiconductor Manufacturing Co., Ltd. | 发明人 | Kinyua Martin;Soenen Eric;Wang Ruopeng |
| 分类号 | H03F3/38;H03F3/217 | 主分类号 | H03F3/38 |
| 代理机构 | Duane Morris LLP | 代理人 | Duane Morris LLP |
| 主权项 | 1. A pulse width modulation (PWM) amplifier comprising: a first amplifier stage configured to amplify an analog input signal in the analog and digital domains using a first pulse width modulation (PWM) generator, to provide a first stage output for coupling to a load; a gain module configured to amplify a quantization error of the first PWM generator by a predetermined gain; a second amplifier stage configured to spectrally shape and attenuate the amplified quantization error of the first PWM generator using a second PWM generator, to provide a second stage output for coupling to the load. | ||
| 地址 | Hsin-Chu TW | ||