公开(公告)号：WO1996014693A1

公开(公告)日：1996-05-17

申请号：PCT/US1995014601

申请日：1995-11-03

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  GRANDFIELD, Walter ,  PETERSON, Vance, H.

IPC: H04B01/06

CPC classification number: H03G3/3068 ,  H03G3/3036 ,  H03G3/3052 ,  H04B1/109

Abstract: A selective call receiver (100) includes a radio frequency amplifier (202) having an output power level that is controllable. A radio frequency level sensor (500) generates a sensor output signal in response to an input signal level received at the radio frequency amplifier (202). The sensor output signal is conditioned by a filter (401, 402) to generate a control signal representing an effective value of the input signal level received at the radio frequency amplifier (202). The control signal is then coupled to an amplifier output power level adjustment circuit (403) that operates to adjust a power gain of the radio frequency amplifier (202) in an unconditionally stable feed-forward manner such that the output power level remains substantially constant when the input signal level sensed by the radio frequency level sensor (500) substantially reaches or exceeds a predetermined signal overload level.

Abstract translation: 选呼接收机（100）包括具有可控制的输出功率电平的射频放大器（202）。 无线电频率电平传感器（500）响应于在射频放大器（202）处接收到的输入信号电平产生传感器输出信号。 传感器输出信号由滤波器（401,402）调节以产生表示在射频放大器（202）处接收的输入信号电平有效值的控制信号。 控制信号然后被耦合到放大器输出功率电平调节电路（403），其操作以无条件稳定的前馈方式调节射频放大器（202）的功率增益，使得输出功率电平在 由射频电平传感器（500）感测的输入信号电平基本上达到或超过预定的信号过载电平。

公开(公告)号：EP0807338A1

公开(公告)日：1997-11-19

申请号：EP95939865.0

申请日：1995-11-03

Applicant: MOTOROLA, INC.

Inventor： GRANDFIELD, Walter ,  PETERSON, Vance, H.

IPC: H04B1 ,  H03G3

CPC classification number: H03G3/3068 ,  H03G3/3036 ,  H03G3/3052 ,  H04B1/109

Abstract: A selective call receiver (100) includes a radio frequency amplifier (202) having an output power level that is controllable. A radio frequency level sensor (500) generates a sensor output signal in response to an input signal level received at the radio frequency amplifier (202). The sensor output signal is conditioned by a filter (401, 402) to generate a control signal representing an effective value of the input signal level received at the radio frequency amplifier (202). The control signal is then coupled to an amplifier output power level adjustment circuit (403) that operates to adjust a power gain of the radio frequency amplifier (202) in an unconditionally stable feed-forward manner such that the output power level remains substantially constant when the input signal level sensed by the radio frequency level sensor (500) substantially reaches or exceeds a predetermined signal overload level.