CAJ | 학술논문

介绍了行间转移 CCD 芯片 KAI-04022的工作原理,根据芯片自身的特点设计了驱动电路。首先,按照信号电平状态多少把驱动信号分为两电平信号和三电平信号两种类型,利用二极管钳位电路和 MOSFET 驱动器实现两电平信号的输出,而三电平信号的实现是利用 AFE 芯片 AD9920A 产生弱驱动能力信号,此信号在压控恒流源电路提供的偏置电流作用下,经过电流型反馈放大器组成的同相射随电路放大输出,为 CCD 芯片提供驱动。实验结果表明,像素时钟为40 MHz 时,水平驱动信号的上升沿为4 ns,幅度为4.2 V,三电平驱动信号的2个上升沿均为50 ns,电子快门信号发生电路能够在基底电压的基础上产生幅度为48 V、脉宽为4 μs 的电压脉冲。各驱动电路产生的信号均满足要求,能够为行间转移 CCD 提供驱动。
개소료행간전이 CCD 심편 KAI-04022적공작원리,근거심편자신적특점설계료구동전로。수선,안조신호전평상태다소파구동신호분위량전평신호화삼전평신호량충류형,이용이겁관겸위전로화 MOSFET 구동기실현량전평신호적수출,이삼전평신호적실현시이용 AFE 심편 AD9920A 산생약구동능력신호,차신호재압공항류원전로제공적편치전류작용하,경과전류형반궤방대기조성적동상사수전로방대수출,위 CCD 심편제공구동。실험결과표명,상소시종위40 MHz 시,수평구동신호적상승연위4 ns,폭도위4.2 V,삼전평구동신호적2개상승연균위50 ns,전자쾌문신호발생전로능구재기저전압적기출상산생폭도위48 V、맥관위4 μs 적전압맥충。각구동전로산생적신호균만족요구,능구위행간전이 CCD 제공구동。
The operating principle of the interline image CCD sensor KAI-04022 was introduced.Due to the characteris-tics of the chip itself,the driving circuit was designed.The driving signal was divided into two level signals and three lev-el signals according to the number of signal level state.The two level signal output was realized by using the diode clam-ping circuit and MOSFET driver.The three level signals were realized through the driving signal result from AFE chip AD9920A.Under the offset current supplied by the voltage-controlled constant current source circuit,the weak driving signal was amplified output through the non-inverting emitter follower circuit composed by the current feedback ampli-fier.Ultimately,the driving was supplied for the CCD.The experimental results show that when the pixel clock was 40 MHz,the rising edge of the driving signal was 4 ns and the amplitude was 4.2 V.The two rising edges of the three level driving signal were both 50 ns.And the voltage pulse signal,whose amplitude was 48 V and pulse width was 4 μs,was produced by the electronic shutter circuit based on the substrate voltage.The signal produced by every driving circuit met the requirements and was able to supply the driving for the interline CCD.