| 摘要 |
<p>1524380 Charge transfer devices RCA CORPORATION 14 Nov 1975 [18 Nov 1974] 47077/75 Heading G4A [Also in Division H4] In a charge transfer system comprising an array of charge transfer elements arranged in P rows and Q columns, (the electrodes 28, 30 of the last row and five columns 60, 62, 64, 65, 67 being shown in Fig. 4) an N phase output register C includes electrodes 48a, 50a, 52a ... each aligned with one of the columns and every Nth electrode being controlled by the same phase control signal (as described N = 2 and the electrodes are connected alternately to control signals # C1 , # C2 ) so that 1/N of the stored data is transferred to the output register at a time, this data being transferred out by a switch 70 before the next 1/N of the stored data is read out. The apparatus may be used for reading out video information from a frame transfer CCD imager. In the embodiment of Fig. 4 first the data beneath electrode 46 in column 60, 64, 67 is transferred to beneath electrodes 48b, 52b, 54b. Then the data in columns 62, 65 is returned to beneath electrode G2, the data beneath electrodes 48b, 52b, 54b then being read out into register 72. Next the data in columns 62, 65 is stored beneath electrodes 50b, 53b and then a register C2 is clocked at twice the frequency to interleave the first read out data stored in register C1 with the data in the output register C. In the embodiment of Fig. 8 the output register is controlled by three phase control signals # C1 , # C2 , # C3 . Stored signals are successively propagated in electrodes 109, 110, 112, 114 and at phase control signal # C1 the signals stored in channels 100, 103, 106 spill into the well beneath electrodes 132, 138, 140, the rest of the signals being propagated back beneath electrode 112. Before the next phase control signal # C2 is applied, signal G7 goes high and then low so that signal stored beneath for example electrode 132 is transferred via electrode 116 to beneath electrode 142. Subsequently at phase control signals # C2 , # C3 the charge in the other channels is transferred and at phase control signal # C2 the signal stored beneath electrode 142 is transferred to beneath electrode 144. The system of Fig. 8 may be modified for control by conventional push clocks (i.e. overlapping clocks with slow fall times). The signals from the output register may be weighted to simulate a horizontal photosensing aperture of desired shape, e.g. a Gaussian distribution may be obtained.</p> |
