公开(公告)号：US6373339B2

公开(公告)日：2002-04-16

申请号：US87993301

申请日：2001-06-14

Applicant: IBM

Inventor： ANTOGNETTI PHILLIP ,  GRIFFITHS JIM ,  HELMS DAVID ,  MONIZ JAMES ,  MUNRO SCOTT ,  PARK JOSHUA ,  STUEBING CARL ,  ZHANG XIANGDONG

IPC: H03F3/68 ,  G05F1/565 ,  H03F1/30 ,  H03F3/345 ,  H03F3/04

CPC classification number: G05F1/565 ,  H03F1/301 ,  H03F3/345

Abstract: A bias network for a radio frequency signal power amplifier. A current source is connected to a source of band gap voltage and produces a current proportional to the voltage. A reference voltage circuit receives the current and produces a voltage which is proportional to the current, as well as changes in temperature. An operational amplifier is used to connect the reference voltage to the power amplifier, so that the power amplifier is effectively isolated from the reference voltage circuit and current bearer circuit. A power amplifier breakdown protection circuit is connected across the output of the operational amplifier for diverting avalanche current produced form the power amplifier away from the power amplifier when the power amplifier output is mismatched through the antenna. Baseband signal transmission from the power amplifier to the bias network circuit is also significantly reduced, thus avoiding the generation of spurious radiation components.

Abstract translation: 用于射频信号功率放大器的偏置网络。 电流源连接到带隙电压源，并产生与电压成比例的电流。 参考电压电路接收电流并产生与电流成比例的电压以及温度变化。 使用运算放大器将参考电压连接到功率放大器，使功率放大器与参考电压电路和电流承载电路有效隔离。 功率放大器击穿保护电路跨越运算放大器的输出连接，当功率放大器输出通过天线失配时，将从功率放大器产生的雪崩电流从功率放大器转移。 从功率放大器到偏置网络电路的基带信号传输也显着减少，从而避免了杂散辐射分量的产生。

公开(公告)号：JP2002027104A

公开(公告)日：2002-01-25

申请号：JP2001127065

申请日：2001-04-25

Applicant: IBM

Inventor： JADUS DALE K ,  MONIZ JAMES M ,  PUSL JOSEPH ,  RUHE COLIN ,  STUEBING CARL

IPC: H03F3/68 ,  H03F1/02 ,  H03F3/193 ,  H03F3/24 ,  H04B1/04 ,  H04M1/02 ,  H04M1/60 ,  H04M1/725 ,  H04M1/73

Abstract: PROBLEM TO BE SOLVED: To provide a novel improved radio frequency power amplifier that is used for a battery-driven handset unit of a radio communication system. SOLUTION: This radio frequency power amplifier has a small power signal amplification path and a high power signal amplification path and is used for the battery-driven handset unit of the radio communication system. Depending on whether the handset is placed within a prescribed distance from a base station or outside the prescribed distance, a logic bias means in the handset selects the small power signal amplification path or the high power signal amplification path. Thus, a signal from the handset received by the base station reaches a required power level.