发明名称 |
Circuit and method for receiving and mixing radio frequencies in a direct conversion receiver |
摘要 |
A frequency mixing circuit and a frequency mixing method. The frequency mixing circuit includes first and second differential amplifiers, a subtracter and a mixer. The first differential amplifier amplifies a first pair of input signals having a first frequency to generate a first differential signal. The second differential amplifier amplifies a second pair of input signals having the first frequency orthogonal to the first pair input signals to generate a second differential signal. The subtracter subtracts the second differential signal from the first differential signal. The mixer mixes the subtracted signal with a first and second pairs of drive signals having a second frequency orthogonal to each other, in a sub-harmonic double balanced mixing mode, so that the mixer generates a pair of output signals orthogonal to each other without secondary harmonics.
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申请公布号 |
US2004214547(A1) |
申请公布日期 |
2004.10.28 |
申请号 |
US20040816165 |
申请日期 |
2004.04.01 |
申请人 |
SAMSUNG ELECTRONICS CO., LTD. |
发明人 |
KIM YOUNG-JIN;HWANG IN-CHUL |
分类号 |
H03D7/00;H03D7/14;H03D7/16;H04B1/30;(IPC1-7):H04B1/10;H04N17/00 |
主分类号 |
H03D7/00 |
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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