公开(公告)号：KR1020010025906A

公开(公告)日：2001-04-06

申请号：KR1019990036966

申请日：1999-09-01

Applicant: 한국과학기술원

Inventor： 이현우 ,  김병진 ,  이성호 ,  남명룡 ,  성단근

IPC: B64G99/00

Abstract: PURPOSE: A star sensor and a star recognizing/tracking method thereof are provided to prevent a wrong reference voltage from being inputted in an ADC(Analog Digital Converter), to effectively drive a peltier cooler and to have a large capacity of CCD(Charge Coupled Device) image buffer. CONSTITUTION: A reference voltage generation circuit(210) comprises a DAC(Digital Analog Converter) for the analog conversion of a signal for generating a reference voltage; a high reference voltage setting unit(211) including amplifiers(A1,A3) for amplifying the output of the DAC in two stages; a DAC for the analog conversion of a signal for generating a low reference voltage; a low reference voltage setting unit(212) including amplifiers(A2,A4) for amplifying the output of the DAC in two stages; and a resistance(R5) prepared between a non-inversion input terminal of the amplifier of the high reference voltage setting unit and the non-inversion input terminal of the amplifier of the low reference voltage setting unit to generate the high reference voltage of the ADC bigger than the low reference voltage. The ADC reference voltage setting unit is made up to make the high reference voltage bigger than the low reference voltage of the ADC for converting a photo of a star to a digital signal. Accordingly, the error of setting the reference voltage is prevented.

Abstract translation: 目的：提供星形传感器和星型识别/跟踪方法，以防止在ADC（模拟数字转换器）中输入错误的参考电压，以有效驱动珀尔图尔冷却器并具有大容量的CCD（电荷耦合 设备）图像缓冲区。 构成：参考电压产生电路（210）包括用于产生参考电压的信号的模拟转换的DAC（数字模拟转换器）; 高参考电压设定单元（211）包括放大器（A1，A3），用于两级放大DAC的输出; 用于产生低参考电压的信号的模拟转换的DAC; 低参考电压设定单元（212），包括放大器（A2，A4），用于两级放大DAC的输出; 以及在高参考电压设定单元的放大器的非反相输入端与低参考电压设定单元的放大器的非反相输入端之间准备的电阻（R5），以产生ADC的高参考电压 大于参考电压低。 ADC参考电压设置单元用于使高参考电压大于ADC的低参考电压，以将星形照片转换为数字信号。 因此，防止设定基准电压的误差。