发明名称 |
Blocker-Tolerant Wideband Noise-Canceling Receivers |
摘要 |
Because of associated disadvantages of narrow-band off-chip radio-frequency (RF) filtering, a mixer-first receiver front-end designed to tolerate blockers with minimal gain compression and noise factor degradation is disclosed. The mixer-first receiver front-end includes two separate down-conversion paths that help to minimize added noise and voltage gain prior to baseband filtering, which are critical factors in eliminating narrow-band off-chip RF filtering. |
申请公布号 |
US2016043757(A1) |
申请公布日期 |
2016.02.11 |
申请号 |
US201514920455 |
申请日期 |
2015.10.22 |
申请人 |
Broadcom Corporation |
发明人 |
ROFOUGARAN Ahmadreza;DARABI Hooman;MURPHY David |
分类号 |
H04B1/10 |
主分类号 |
H04B1/10 |
代理机构 |
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代理人 |
|
主权项 |
1. A receiver front-end for receiving a radio-frequency (RF) signal represented by an RF voltage signal and an RF current signal from an antenna, the receiver front-end comprising:
a main down-conversion path comprising: a first passive mixer configured to mix the RF current signal with a local-oscillator (LO) signal to provide a first down-converted signal, and a first transimpedance amplifier configured to apply a first gain to the first down-converted signal to provide a first output signal; and an auxiliary down-conversion path comprising: a transconductance cell configured to convert the RF voltage signal into a corresponding current signal, a second passive mixer configured to mix the corresponding current signal with the LO signal to provide a second down-converted signal, and a second transimpedance amplifier configured to apply a second gain to the second down-converted signal to provide a second output signal, wherein the RF voltage signal is a voltage between a source impedance of the antenna and the main down-conversion path, and the RF current signal is a current flowing through the main down-conversion path. |
地址 |
Irvine CA US |