Analogue signal generator for TDI (Transport Driver Interface) CCD (Charge Coupled Device)

An analog signal and generator technology, which is used in electrical pulse generator circuits, instruments, and single semiconductor device testing, etc., can solve the problems of complex hardware circuit debugging, long development cycle, and non-adjustable output signal cycle, so as to shorten the development cycle. , the effect of short debugging time and simple structure

Inactive Publication Date: 2012-07-04
BEIJING UNIV OF TECH
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  • Abstract
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AI Technical Summary

Problems solved by technology

The current method directly uses the hardware circuit to simulate the function of the CCD device and obtains the corresponding output signal, but it has defects such as complicated debugging of the hardware circuit, long development cycle, and non-adjustable output signal cycle.

Method used

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  • Analogue signal generator for TDI (Transport Driver Interface) CCD (Charge Coupled Device)
  • Analogue signal generator for TDI (Transport Driver Interface) CCD (Charge Coupled Device)
  • Analogue signal generator for TDI (Transport Driver Interface) CCD (Charge Coupled Device)

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Embodiment Construction

[0025] The invention provides a TDI CCD analog signal generator, combined figure 1 , figure 2 , image 3 , Figure 4A , Figure 4B and Figure 5 For further clarification:

[0026] The TDI CCD analog signal generator provided by the present invention includes a timing generating circuit, a signal synthesizing circuit, a filter circuit and a power supply circuit. Wherein, the sequence generating circuit includes a crystal oscillator, a CPLD device, a dial switch and an inverter. In the present embodiment, crystal oscillator is the active crystal oscillator of 20MHz, and what CPLD device selects is the EPM7128 of Altera Company, what the dial switch selects is the 10-bit dial switch of binary input decimal output type, and what the inverter selects is 74HC540; The synthesis circuit includes two triode 9018 devices and a 74HC540 inverter; the filter circuit includes the operational amplifier AD744. The power supply voltage required by the crystal oscillator is +5V. After ...

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Abstract

The invention relates to an analogue signal generator for a TDI (Transport Driver Interface) CCD (Charge Coupled Device), which is used for generating analogue signals of output signals of the TDI CCD and overcoming the defect that the TDI CCD is not suitable for repeatedly testing in a process of debugging and developing a signal processing circuit of the TDI CCD. The analogue signal generator specially comprises a timing sequence generation circuit, a signal combination circuit, a filtering circuit and a power supply circuit. The timing sequence generation circuit generates a logic signal pulse, the analogue signals of the output signals of the TDI CCD are preliminarily obtained through the signal combination circuit, and then the analogue signals of the output signals of the TDI CCD are finally obtained after passing through the filtering circuit. According to the analogue signal generator for the TDI CCD provided by the invention, the analogue signals of the output signals of the TDI CCD under different integration time are simulated by adjusting the period of the analogue signals, so as to replace the output signals of the TDI CCD to be used for the development of the signal processing circuit of the TDI CCD.

Description

1. Technical field [0001] The invention relates to a signal generator, in particular to a TDI CCD analog signal generator. 2. Background technology [0002] TDI CCD is a time-delay integral type CCD, which improves sensitivity by accumulating charge through multiple exposures. Compared with ordinary CCDs, TDI CCDs not only have high imaging sensitivity but also have a higher signal-to-noise ratio under low illumination, and are widely used in aerospace, medical equipment and camera equipment and other fields. Due to the complex process and high price of the TDI CCD device, there will be certain risks when it is directly used to debug and develop the CCD signal processing circuit, and its driving signal requirements are complicated, and the multi-power supply may cause problems in the experiment due to the development of the circuit. Unnecessary losses caused by mistakes. [0003] In order to avoid the risk of directly debugging and developing the CCD signal processing circ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K3/023G01R1/28G01R31/26
Inventor 刘有军于苒陆建荣刘荣黎
Owner BEIJING UNIV OF TECH
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