KEYWORDS: Solar cells, Optical spheres, Solar energy, Reconnaissance, Signal detection, Target detection, Absorption, Signal processing, Power supplies
Under the requirements of flexible, stealthy and miniaturize, the energy system has become the most critical factor that constraint the performance of smart unmanned equipment. Due to its advantages of convenient movement and strong environmental adaptability, the sphere platform shows broad prospects in military and civilian application. This paper designed an energy self-sufficient sphere platform equipped with intelligence reconnaissance device. The energy module of the device consists of an inscribed polyhedron solar cell array. The high power density energy storage component inside the sphere realizes energy storage and power supply for the signal transmission module. The sphere is equipped with an autonomous mobile unit and a detection unit, activated by outside trigger signal, and can be used in close reconnaissance, short-range detection and strategic destruction. The output power of the prototype machine produced by 3D printing is close to the theoretical result, and it maintained in high value during device rotation, laying the technical foundation for the practical application of this spherical platform.
The noises of CMOS readout integrated circuit (ROIC) for hybrid focal plane array (FPA) may occupy a great part of
total noise in conditions that a low resistance or large capacitor detector interfacing with CTIA input stage. A novel low
noise low power preamplifier with shared current-mirrors bias is designed. It has a gain of more than 90dB, which makes
enough inject efficiency and low detector bias offset. Besides, it has strong detector bias control, because the shared
current-mirror copies the DC current of the amplifier and generates the bias control voltage. A pixel level Correlated
Double Sample circuits is designed in order to suppress the reset KTC noise and 1/f noise from preamplifier. An
experimental chip of 30μm pitch 32×32 array was fabricated in standard 0.5μm CMOS mixed signal process. A few
experimental structures are designed to study the allocating of layout area for low noise designing. The ROIC is bonded
to an existing back-illuminated 30μm pitch InGaAs photodiode array with indium bump fabrication. The test of both the
ROIC chips and InGaAs focal plane array is shown in this paper, and the contrast of different structure is shown and
analyzed.
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