Design of miniaturized terahertz camera core based on ASIC

摘要

Uncooled terahertz (THz) focal-plane arrays (FPA) can realize real-time, continuous-wave terahertz detection and imaging. In this paper, the design method of adjustable DC bias voltage for 320×240 room temperature terahertz focal plane is introduced. The logic timing based on ASIC chip JL7603B is realized. The analog output signal of room temperature terahertz focal plane array is digitized by LTC2245 analog-to-digital converter. Data acquisition and real-time imaging are realized by interacting with the PC through the USB data cable. Using a modular design method, a compact terahertz camera core was successfully designed, the size was 25mm × 25mm × 35mm, the weight was less than 70g and the power consumption was less than 1.2W. The test results show that the signal processing and data acquisition of the terahertz focal plane through the camera core, the RMS noise is 388.6μV, the non-uniformity is 5.91% and the function of THz real-time detection is realized.