Title :
Design of three high-speed CCD linear image sensor synchronous driving, amplifying and A / D circuit
Author :
Li, Fubao ; Li, Zhongke ; Wang, Dexi ; Li, Qin
Author_Institution :
Sch. of Petrochem. Eng., Shenyang Univ. of Technol., Liaoyang, China
Abstract :
To measure the height of conductor and the stagger of railway overhead contact net, we designed the mobile-type railway contact net geometry measuring equipment based on three high-speed CCD linear image sensors. High-speed CMOS circuit of the CCD logic driver is low-cost, and there is no need to debug. According to the features of TCD1703 chip following measures are taken: (1) CCD output signal is amplified by the summing amplifier, and the output voltage is doubled. (2) using the characteristics of that LED dynamic resistance is small ,we realized non-destructive level shifting. (3) in the circuit, RC compensation circuit was set, eliminating the background level of saw-tooth wave phenomena. Circuit can work stability under the 20 MHZ clock.
Keywords :
CCD image sensors; CMOS logic circuits; amplifiers; analogue-digital conversion; conductors (electric); A-D circuit; LED dynamic resistance; RC compensation circuit; TCD1703 chip; frequency 200 MHz; high-speed CCD linear image sensor synchronous driving; high-speed CMOS circuit; logic driver; mobile-type railway contact net geometry measuring equipment; railway overhead contact net; saw-tooth wave phenomena; CMOS image sensors; CMOS logic circuits; Charge coupled devices; Conductors; Driver circuits; Electrical resistance measurement; Geometry; Image sensors; Rail transportation; Semiconductor device measurement; A/D; DSP; FIFO; array CCD; contact net;
Conference_Titel :
Networking and Digital Society (ICNDS), 2010 2nd International Conference on
Conference_Location :
Wenzhou
Print_ISBN :
978-1-4244-5162-3
DOI :
10.1109/ICNDS.2010.5479272
