| 发明名称 |
FREQUENCY MEASUREMENT FOCAL PLANE ARRAY INPUT CIRCUIT |
| 摘要 |
The invention measures the frequency of a heterodyne laser radar (LADAR) system signal in the input cell of a focal plane array (FPA). Embodiments amplify the return signal, and drive it into a counter for a fixed period of time. The frequency is the number of counts divided by the count time. An example design amplifier amplifies the return of a single photon response of an avalanche photodiode with a gain of 100 into a digital signal level at a 200 MHz rate with only 84 μW, demonstrating the feasibility of the approach. |
| 申请公布号 |
US2017031012(A1) |
申请公布日期 |
2017.02.02 |
| 申请号 |
US201514813159 |
申请日期 |
2015.07.30 |
| 申请人 |
BAE SYSTEMS Information and Electronic Systems Integration Inc.. |
发明人 |
Hairston Allen W;Madison Gary M |
| 分类号 |
G01S7/497 |
主分类号 |
G01S7/497 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A device for measuring a frequency of a heterodyne laser radar (LADAR) system signal in an input cell of a focal plane array (FPA) comprising:
a detector; an AC coupled amplifier input; a counter; and a latch outputting a read out. |
| 地址 |
Nashua NH US |
