摘要:
A solid-state imaging device which is horizontally scanned by a discontinuous scanning pulse train, wherein an output signal of the device is integrated by a signal processing circuit which comprises an emitter follower (source follower) circuit and a capacitor disposed in parallel with the emitter follower (source follower) circuit, whereby noise components are canceled so as to derive only a video signal. With this solid-state imaging device, fixed pattern noise can be eliminated, and a good picture quality can be achieved.
摘要:
A solid-state imaging device wherein a MOS sensor is employed for a photosensor part, a CTD shift register is employed for a read-out circuit, first and second transfer gates are connected between vertical signal output lines and the CTD, and a reset gate is connected between a juncture of the first and second transfer gates and a reset voltage line. A method is adopted in which signal outputs of a plurality of rows are transferred to the CTD in a horizontal blanking period, and signals of a plurality of rows are simultaneously read out in a horizontal scanning period. At the signal transfer, bias charges are dumped into the vertical signal output lines from the CTD, and mixed charges consisting of the bias charges and signal charges are transferred to the CTD. Thereafter, the signals are read out.
摘要:
A circuit for generating scanning pulses comprising a plurality of stages of basic circuits connected in series, said each basic circuit comprising first, second and third insulated gate field-effect transistors (MISTs) each of which has first and second terminals each being either of source and drain terminals and a gate terminal, said first terminal of said first MIST being used as a clock pulse-applying terminal, said gate terminal of said first MIST being used as an input terminal, said second terminal of said first MIST and said first terminal and said gate terminal of said second MIST being connected and used as a scanning pulse output terminal, said second terminal of said second MIST and said first terminal of said third MIST being connected and used as an output terminal, said second terminal of said third MIST being used as a ground terminal, said gate terminal of said third MIST being used as a feedback input terminal.
摘要:
Disclosed is a two-dimensionally arrayed solid-state imaging device for a television camera having a photodiode array arranged at a photo-sensing section and a readout horizontal register constructed by a charge transfer device (CTD) such as a BCD, CCD or BBD. An inverter circuit is provided for each of the vertical signal lines. An input of the inverter circuit is connected to a vertical signal line drain of at least one transfer transistor arranged between the vertical signal line and the CTD, and an output of the inverter circuit is connected to a gate of the transfer transistor. Transfer efficiency is improved by the insertion of the inverter circuit and fixed pattern noise is substantially reduced by supplying bias currents.
摘要:
In a solid-state imaging device having on an identical semiconductor substrate a plurality of photodiodes which are arrayed in two dimensions, vertical and horizontal switching MOSFETs which select the positions of the photodiodes, and vertical and horizontal scanning circuits which provide scanning pulses for controlling the operations of the vertical and horizontal switching MOSFETs; the improvement therein comprising a clamping circuit which is made up of a diode, a MOSFET or the like and which is disposed between the photodiode and a vertical scanning line of the succeeding stage, so that excess charges overflowing the photodiode are drawn out from the vertical scanning line through the clamping circuit, whereby the blooming can be prevented.
摘要:
This invention relates to an area imaging device having an array of picture elements formed of photodiodes and insulated-gate MOSTs which is vertically scanned by a shift register and horizontally scanned by a charge transfer device (CTD). The solid-state imaging device according to this invention has a transfer MOST provided between a vertical signal output line and a horizontal switch MOST, a resetting MOST connected to the junction between said transfer MOST and the horizontal switch MOST, and a mechanism for setting the vertical signal line at a reference potential just before signal transfer. The transfer MOST connected between the junction of the horizontal switch MOST and the resetting MOST and the vertical signal line is a double-gate MOST formed of a series connection of a transfer gate and another transfer gate. Therefore, the charges under the gate of the transfer MOST can be removed for fixed noise to be greatly reduced.
摘要:
A solid-state imaging device includes a vertical CCD shift register for transferring electric charge. The electrode of the vertical CCD located nearest to the substrate is extended outside of the region of the vertical CCD to a region of a layer where isolation is required. The layer is thus imparted with two functions, that is, the function of the CCD electrode and that of the iolation electrode. An overflow transistor is also provided to discharge excess charge produced by high intensity light.
摘要:
Disclosed is a solid-state imaging device wherein optical information of a number of photo-electric conversion elements arranged in a matrix is read into vertical signal lines by a vertical shift register and then the optical information on the vertical signal lines is horizontally scanned by a horizontal register of a charge transfer device. Bias charge storage means and quasi-signal sweep-out drains are disposed between the horizontal register and the vertical signal lines, and a bias charge input means is arranged in the horizontal register. In order to ensure high efficiency in transferring signals between the vertical lines to the storage means, the sweep-out drains and the charge transfer device, it is arranged for bias charges to be provided at each stage of transfer. Thus, bias charges supplied from the storage means are used to transfer charges from the vertical lines to the storage means. Similarly bias charges directly injected from the quasi-signal sweep-out drains are used to sweep out quasi-signals from the storage means to the quasi-signal sweep-out drains. Finally bias charges supplied from the bias charge input means of the charge transfer device are used to read signals from the storage means into the charge transfer device. By virtue of this, the sweep-out efficiency of the quasi-signals from the capacitances which supply the bias charges and a read-out efficiency of the signal charges are enhanced and a high quality of video signal is produced.
摘要:
Vertical CCD registers constituting parts of an interline type CCD imaging device hold independently the signal charges transferred from photoelectric conversion elements and having different storage durations. Transfer of charge to the vertical CCD registers from the photoelectric conversion element is performed at least twice during one field period. The vertical CCD registers transfer the signal charges of different storage durations independent of one another.
摘要:
A charge transfer type solid-state device incorporating a charge coupled device (CCD). In order to eliminate field after image and smear, at least two electrode pairs are provided in a vertical CCD shift register for transferring the signal charges stored in photoelectric conversion elements, the electrode pairs being disposed within the vertical pitch of the photoelectric conversion elements. P