IMPROVED VERTICAL DRIVER CIRCUIT FOR CCD IMAGE SENSOR
Original Publication Date: 1998-Jun-01
Included in the Prior Art Database: 2002-Jul-05
The vertical drive of the CCD sensor is used to shift the array pixels into a shift register where the horizontal drive circuit shifts them to the video output amplifier. While only one row of pixels is trans- ferred from the array to the shift register, every line in the array must be moved down by the vertical driver. The array requires two complementary drive pulses every line, one starting from a -8.5 volts and shifting to -1.0 volts, while the other starts at -1.0 volts and shifts to -8.5 volts. In addition, these inputs are driven to +8.5 volts to select a field, two fields composing a frame, alternately. All pulses for both horizontal and vertical drivers are generated in a logic array at the appropriate time.