公开(公告)号：US4636718A

公开(公告)日：1987-01-13

申请号：US632728

申请日：1984-07-20

Applicant: Joseph H. Labrum ,  Allen D. Wilcox

Inventor： Joseph H. Labrum ,  Allen D. Wilcox

IPC: G01R23/165 ,  G01R23/17

CPC classification number: G01R23/165 ,  G01R23/17

Abstract: This invention is directed to a spectrum analyzer system which is laser-driven and which includes a standard Bragg cell and a standard photo-diode array as the output detector. In this system, the Bragg cell is driven by a bandwidth expansion circuit which receives the typical R.F. input signal, supplies it to a variable center frequency filter or to a bank of filters which then down-converts the signal and supplies the signal to a real time signal storage memory at a first signal rate. The signals are retrieved from the memory at a second, much greater signal rate, up-converted and supplied to the Bragg cell to affect the operation thereof in the usual fashion. This time base compression circuit has the effect of producing an improved optical spectrum analyzer with expanded frequency resolution.

Abstract translation: 本发明涉及一种激光驱动的频谱分析仪系统，其包括标准布拉格单元和作为输出检测器的标准光电二极管阵列。 在该系统中，布拉格单元由带宽扩展电路驱动，该电路接收典型的R.F. 输入信号，将其提供给可变中心频率滤波器或一组滤波器，然后对该信号进行下变频，并以第一信号速率将信号提供给实时信号存储存储器。 信号从存储器中以第二个更大的信号速率被检索，上升转换并提供给布拉格单元以通常的方式影响其操作。 该时基压缩电路具有产生具有扩展的频率分辨率的改进的光谱分析仪的效果。

公开(公告)号：US4648135A

公开(公告)日：1987-03-03

申请号：US632635

申请日：1984-07-20

Applicant: Joseph H. Labrum ,  Allen D. Wilcox

Inventor： Joseph H. Labrum ,  Allen D. Wilcox

IPC: H04B10/158 ,  H04N5/335 ,  H04N5/355 ,  H04N5/378 ,  H04B9/00 ,  H01J40/14

CPC classification number: H04B10/66 ,  H04B10/69 ,  H04N5/335

Abstract: A signal handling system of improved dynamic range wherein a logarithmic circuit is interposed between a photo-diode array and other output circuitry.

Abstract translation: 一种改进的动态范围的信号处理系统，其中对数电路插在光电二极管阵列和其它输出电路之间。