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    • 106. 发明授权
    • Master/slave oscillation production and distribution in a multiple RF transceiver system supporting MIMO operations
    • 支持MIMO操作的多RF收发器系统中的主/从振荡生产和分配
    • US08107442B2
    • 2012-01-31
    • US11168733
    • 2005-06-28
    • Arya Reza BehzadJason A. TrachewskyR. Tushar Moorti
    • Arya Reza BehzadJason A. TrachewskyR. Tushar Moorti
    • H04B7/216
    • H04B1/40
    • A multiple input multiple output (MIMO) RF transceiver system includes a plurality of RF transceiver ICs, a crystal, and master oscillation coupling. Each of the plurality of RF transceiver ICs includes crystal oscillator circuitry. Crystal oscillator circuitry of the first RF transceiver IC and a crystal are operable to produce a master oscillation. Master oscillation coupling couples the master oscillation produced by the first RF transceiver IC to the at least one other RF transceiver IC. In one embodiment, the master oscillation is passed from the first RF transceiver IC to each other transceiver RF ICs. In another embodiment, the master oscillation is used to produce a slave oscillation at a second RF transceiver IC and subsequent RF transceiver ICs produce there own slave oscillation based upon a slave oscillation received from a prior RF transceiver IC.
    • 多输入多输出(MIMO)RF收发器系统包括多个RF收发器IC,晶体和主振荡耦合。 多个RF收发器IC中的每一个包括晶体振荡器电路。 第一RF收发器IC和晶体的晶体振荡器电路可操作以产生主振荡。 主振荡耦合将由第一RF收发器IC产生的主振荡耦合到至少一个其它RF收发器IC。 在一个实施例中,主振荡从第一RF收发器IC传递到彼此的收发器RF IC。 在另一个实施例中,主振荡用于在第二RF收发器IC产生从动振荡,并且随后的RF收发器IC基于从先前RF收发器IC接收的从动振荡而产生自身的从动振荡。
    • 107. 发明授权
    • Gain insensitive high-pass VGA
    • 增益不高的高通VGA
    • US08064859B2
    • 2011-11-22
    • US12136732
    • 2008-06-10
    • Michael S. KappesArya Reza Behzad
    • Michael S. KappesArya Reza Behzad
    • H04B1/06H04B7/00H04B1/28
    • H03G9/02H03F3/211H03F3/24H03F3/45475H03F2200/372H03F2203/45522H03G9/005
    • An integrated circuit radio transceiver and method therefor includes a high-pass variable gain amplifier (HPVGA) operably disposed within one of the transmitter and the receiver front ends operable to provide a linear variable gain and a substantially constant high-pass frequency corner that does not vary with changes in gain level settings. The HPVGA includes an amplifier operably disposed to receive an input signal and to produce an amplified output based upon the input signal, an adjustable resistance block operable to adjust resistance based upon a gain control input and corner drift compensation block operably disposed to provide corner frequency compensation at the input terminal of the amplifier that is further coupled to receive the input signal from the adjustable resistance block.
    • 集成电路无线电收发器及其方法包括可操作地设置在发射机和接收机前端之一内的高通可变增益放大器(HPVGA),其可操作以提供线性可变增益和基本上恒定的高通频率角 随着增益级别设置的变化而变化。 HPVGA包括可操作地布置成接收输入信号并基于输入信号产生放大输出的放大器,可调电阻块,其可操作以基于增益控制输入和拐角漂移补偿块来调整电阻,所述增益控制输入和拐角漂移补偿块可操作地设置以提供拐角频率补偿 在放大器的输入端处,其进一步耦合以从可调电阻块接收输入信号。
    • 108. 发明授权
    • Cascode CMOS RF power amplifier with programmable feedback cascode bias under multiple supply voltages
    • Cascode CMOS射频功率放大器,具有可编程的反馈共源共栅偏置电压
    • US08063706B2
    • 2011-11-22
    • US12860905
    • 2010-08-22
    • Mingyuan LiAli AfsahiArya Reza Behzad
    • Mingyuan LiAli AfsahiArya Reza Behzad
    • H03F3/04
    • H03F1/0261H03F1/0244H03F1/0272H03F1/223H03F3/193H03F2200/61
    • A Radio Frequency (RF) cascode power amplifier operates with differing battery supply voltages. A transconductance stage has a transistor with an RF signal input at its gate. A cascode stage has at least one cascode transistor, the cascode stage coupled in series with the transconductance stage between a battery voltage node and ground, the cascode stage having an RF signal output at the battery voltage node and at least one bias input to the at least one cascode transistor. Cascode bias feedback circuitry applies fixed bias voltage(s) to the at least one two bias inputs for a low battery voltage and applies feedback bias voltage(s) to the at least two bias inputs for a high battery voltage, the feedback bias voltage(s) based upon a voltage of the battery voltage node. More than two differing battery supply voltages are supported.
    • 射频(RF)共源共栅功率放大器以不同的电池电压工作。 跨导级具有在其栅极处输入RF信号的晶体管。 共源共栅级具有至少一个共源共栅晶体管,所述共源共栅级与电池电压节点和地之间的跨导级串联耦合,所述共源共栅级在电池电压节点处具有RF信号输出和至少一个偏置输入到 至少一个共源共栅晶体管。 串联偏压反馈电路为低电池电压向至少一个两个偏置输入端施加固定偏置电压,并且对于高电池电压将反馈偏置电压施加到至少两个偏置输入端,反馈偏置电压( s)基于电池电压节点的电压。 支持两种不同的电池电源电压。