Power supply noise filter, power supply modulator, and wireless communication device

The invention provides a power supply noise filter, a power supply modulator and a wireless communication device. The power supply noise filter comprises a band elimination filter and a low-pass filter. The band elimination filter includes an inductor and a first capacitor connected in parallel between a first node and a second node. The first node receives the first voltage filtered by the band-pass filter to generate a second voltage at the second node. A first low pass filter includes the inductor and a second capacitor having one end connected to a second node and the other end connected to a ground source. 提供了一种电源噪声滤波器、电源调制器和无线通信装置。电源噪声滤波器包括：带阻滤波器和低通滤波器。带阻滤波器包括：电感器和第一电容器，所述电感器和第一电容器并联连接在第一节点与第二节点之间。第一节点接收由带通滤波器滤波的第一电压，从而在第二节点处生成第二电压。第一低通滤波器包括：所述电感器和第二电容器，第二电容器具有连接到第二节点的一端和连接到接地源的另一端。