Driving circuit of CCD camera for spaceflight

Abstract

The invention discloses a driving circuit of a CCD camera for spaceflight. The driving circuit comprises first to fifth capacitors, an MAX4426 chip, first to seventh resistors, a first diode, a second diode and a DC power supply; the MAX4426 is relatively high in transient response and large current driving capacity; the first capacitor, the second capacitor, the fifth capacitor, the fourth resistor, the fifth resistor and the sixth resistor form a power filtering circuit; the third capacitor, the fourth capacitor, the first diode, the second diode, the first resistor and the second resistor are used for rectifying and stabilizing transient voltage variation of the driving circuit. The driving circuit of the CCD camera for the spaceflight is relatively high in driving capacity, and capable of providing large driving current to the relatively large capacitive load; the increase time and decrease time are matched; the clock offset is small; in addition; the input capacitance is small, the output impedance is small, the working voltage range is wide, the static power consumption is small, the stability is high, and the interference resistance is high.

Description

technical field [0001] The invention relates to a CCD camera for aerospace, in particular to a drive circuit for the CCD camera with high drive capability, high anti-interference capability and low static power consumption. Background technique [0002] With the development of aerospace technology, CCD cameras with high sensitivity and high signal-to-noise ratio have been widely used in the fields of high-precision measurement of spacecraft attitude, space remote sensing, and earth observation. The design of the chip drive circuit is particularly important. The CCD drive circuit is driven by a programmable logic device, which has the advantages of high integration, good reliability, and easy programming of hardware circuits, but there are still weak drive capabilities that cannot provide large drive current for large capacitive loads, and the operating voltage range is narrow. High static power consumption and weak anti-interference ability. Contents of the invention [...

AI Technical Summary

Problems solved by technology

The CCD drive circuit is driven by a programmable logic device, which has the advantages of high integration, good reliability, and easy programming of hardware circuits, but there are still weak drive capabilities that cannot provide large drive current for large capacitive loads, and the operating voltage range is narrow. High static power consumption and weak anti-interference ability

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