公开(公告)号：US5640693A

公开(公告)日：1997-06-17

申请号：US297809

申请日：1994-08-30

申请人： Brent Balch ,  Steve Embling ,  Dave Roberson

发明人： Brent Balch ,  Steve Embling ,  Dave Roberson

IPC分类号： G01S13/78 ,  G08B13/24 ,  H03F3/217 ,  H04B1/04 ,  H04B5/00

CPC分类号： G08B13/2471

摘要： An electronic article surveillance (EAS) system includes a pulsed EAS transmitter, a linear power amplifier having active devices for linear amplification of signals input thereto and a controller for energizing the linear power amplifier active devices correspondingly with transmitter pulsations. A transmitter for use in electronic article surveillance, comprises a transmitting antenna, a source providing a succession of mutually spaced bursts of high-frequency signals, a linear power amplifier having active devices for linear amplification of the succession of mutually spaced bursts of high-frequency signals and a controller for selectively energizing the linear power amplifier active devices. The controller maintains the linear power amplifier active devices unenergized between successive of the mutually spaced bursts of high-frequency signals.

摘要翻译： 电子物品监视（EAS）系统包括脉冲EAS发射器，具有用于线性放大输入信号的有源器件的线性功率放大器和用于对应于发射器脉动激励线性功率放大器有源器件的控制器。 一种用于电子物品监视的发射机，包括一个发射天线，一个提供一连串相互间隔的高频信号脉冲串的源，一个具有有源器件的线性功率放大器，用于线性放大一系列相互间隔的高频脉冲串 信号和用于选择性地激励线性功率放大器有源器件的控制器。 控制器维持线性功率放大器有源器件在连续的相互间隔的高频信号脉冲串之间未通电。