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公开(公告)号：US08774744B2
公开(公告)日：2014-07-08
申请号：US13584828
申请日：2012-08-14
Applicant: Yu-Lin Tsou , Nai-Chen Cheng
Inventor： Yu-Lin Tsou , Nai-Chen Cheng
CPC classification number: H03F3/193 , H03F3/3023 , H03F2200/294 , H03F2200/408 , H03G3/001 , H03G3/3078
Abstract: A radio frequency (RF) front-end circuit and an operating method thereof are provided. The proposed RF front-end circuit includes a first linear amplifier, a second linear amplifier, and a calibration unit. The first linear amplifier performs a high-frequency amplification on a RF signal to generate an amplified RF signal, and down-converts the amplified RF signal into an intermediate frequency (IF) signal. The second first linear amplifier performs a low-frequency amplification on the IF signal to generate an amplified IF signal. The calibration unit is coupled to the first and the second linear amplifiers, and receives a voltage gain fed back from the second linear amplifier. Then, the calibration unit performs an auto-calibration procedure according to the voltage gain fed back from the second linear amplifier to search for an input current value of the first linear amplifier, which correspondingly maximizes the voltage gain of the first amplifier.
Abstract translation: 提供射频（RF）前端电路及其操作方法。 所提出的RF前端电路包括第一线性放大器，第二线性放大器和校准单元。 第一线性放大器对RF信号执行高频放大以产生放大的RF信号，并将放大的RF信号下变频为中频（IF）信号。 第二个第一线性放大器在IF信号上执行低频放大以产生放大的IF信号。 校准单元耦合到第一和第二线性放大器，并且接收从第二线性放大器反馈的电压增益。 然后，校准单元根据从第二线性放大器反馈的电压增益来执行自动校准过程，以搜索第一线性放大器的输入电流值，其相应地使第一放大器的电压增益最大化。
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公开(公告)号：US20130278341A1
公开(公告)日：2013-10-24
申请号：US13584828
申请日：2012-08-14
Applicant: Yu-Lin Tsou , Nai-Chen Cheng
Inventor： Yu-Lin Tsou , Nai-Chen Cheng
CPC classification number: H03F3/193 , H03F3/3023 , H03F2200/294 , H03F2200/408 , H03G3/001 , H03G3/3078
Abstract: A radio frequency (RF) front-end circuit and an operating method thereof are provided. The proposed RF front-end circuit includes a first linear amplifier, a second linear amplifier, and a calibration unit. The first linear amplifier performs a high-frequency amplification on a RF signal to generate an amplified RF signal, and down-converts the amplified RF signal into an intermediate frequency (IF) signal. The second first linear amplifier performs a low-frequency amplification on the IF signal to generate an amplified IF signal. The calibration unit is coupled to the first and the second linear amplifiers, and receives a voltage gain fed back from the second linear amplifier. Then, the calibration unit performs an auto-calibration procedure according to the voltage gain fed back from the second linear amplifier to search for an input current value of the first linear amplifier, which correspondingly maximizes the voltage gain of the first amplifier.
Abstract translation: 提供射频（RF）前端电路及其操作方法。 所提出的RF前端电路包括第一线性放大器，第二线性放大器和校准单元。 第一线性放大器对RF信号执行高频放大以产生放大的RF信号，并将放大的RF信号下变频为中频（IF）信号。 第二个第一线性放大器在IF信号上执行低频放大以产生放大的IF信号。 校准单元耦合到第一和第二线性放大器，并且接收从第二线性放大器反馈的电压增益。 然后，校准单元根据从第二线性放大器反馈的电压增益来执行自动校准过程，以搜索第一线性放大器的输入电流值，其相应地使第一放大器的电压增益最大化。
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