| 发明名称 | System and method for a mixer | ||
| 摘要 | In accordance with an embodiment, a circuit includes a mixer having a signal input port, a local oscillator input port and an output port, a lowpass filter circuit having an input coupled to the output port of the mixer and a terminal configured to be connected to a shunt capacitor, and a difference circuit having a first input coupled to the output port of the mixer, and a second input coupled to an output of the lowpass filter. The output of the difference circuit substantially rejects a DC signal component at the output port of the mixer. | ||
| 申请公布号 | US9543997(B2) | 申请公布日期 | 2017.01.10 |
| 申请号 | US201414160183 | 申请日期 | 2014.01.21 |
| 申请人 | Infineon Technologies AG | 发明人 | Forstner Johann Peter;Ortner Markus |
| 分类号 | H04B1/30;G06G7/12;H03D1/24;H03D3/00;G01S7/03;G01S13/34;G01S7/35;G01S13/93 | 主分类号 | H04B1/30 |
| 代理机构 | Slater Matsil, LLP | 代理人 | Slater Matsil, LLP |
| 主权项 | 1. A circuit comprising: a mixer comprising a signal input port, a local oscillator input port and an output port, wherein the output port of the mixer comprises a current mode output; a first current steering circuit and a second current steering circuit, wherein the first and second current steering circuit each comprises a first positive current source, a first negative current source, and an output, and for each of the current steering circuits: the first positive current source is coupled in series with the first negative current source, wherein the first positive current source is configured to provide a positive current based on a positive output of a mixer,the first negative current source is configured to provide a negative current based on a negative output of the mixer, andan output current at the output of each current steering circuit is a sum of the first positive current source and the first negative current source; a lowpass filter circuit having an input coupled to the output of the second current steering circuit and a terminal configured to be connected to a shunt capacitor; and a difference circuit having a first input coupled to the output of the first current steering circuit and a second input coupled to the output of the second current steering circuit and an output of the lowpass filter circuit, wherein an output of the difference circuit substantially rejects a DC signal component at the output port of the mixer. | ||
| 地址 | Neubiberg DE | ||