公开(公告)号：US06784987B2

公开(公告)日：2004-08-31

申请号：US10054012

申请日：2002-01-21

申请人： Michael Paul Minneman ,  Michael Paul Atwell ,  Elwood James Egerton

发明人： Michael Paul Minneman ,  Michael Paul Atwell ,  Elwood James Egerton

IPC分类号： G01J144

CPC分类号： G01J1/44 ,  G01J1/18

摘要： A range selection circuit (13), including a logarithmic amplifier (23) and output circuitry (25) associated therewith, is configured to directly drive linear ranging circuitry for measurement circuitry (12) in an optical power meter (10) to measure signals that vary over a wide range of, for example, from about −7 dB to about −45 dB. This allows the optical power meter to change ranges as fast as one (1) times the hardware settling time. The range selection circuitry is in parallel with the measurement circuitry, which allows ranging to happen in real time.

摘要翻译： 包括对数放大器（23）和与其相关联的输出电路（25）的量程选择电路（13）被配置为直接驱动光功率计（10）中的测量电路（12）的线性测距电​​路，以测量信号， 在例如约-7dB至约-45dB的宽范围内变化。 这使得光功率计可以快速更改硬件建立时间的一（1）倍。 量程选择电路与测量电路并联，允许实时测距。