摘要:
A solid state image sensor comprising static induction transistors each forming a picture element.Each static induction transistor in the solid state image sensor has a lateral structure in which the source and drain regions are formed by surface regions provided on the same side in an epitaxial layer forming the channel region and a signal charge storage gate region are formed by a buried gate region provided under the channel region and a surface gate region provided on the channel region, so that the source-drain current flows in parallel to the surface of epitaxial layer and is effectively controlled between the buried and surface gate regions.
摘要:
A solid state image pickup device having an electronic shutter function is disclosed. The device comprises a plurality of picture cells each having a static induction transistor and arranged in a matrix, a plurality of vertical and horizontal scanning lines for scanning the cells, vertical and horizontal registers for generating scanning pulses which drive the vertical and horizontal scanning lines, a readout signal line for reading out light information stored in the cells, a reset signal line for resetting the cells, and a shutter speed control circuit for optionally setting in one frame period the timing of reset scanning pulses generated from a vertical register.
摘要:
A solid state image pick-up device comprising a large number of picture cells arranged in a matrix. The picture cell comprises a first photoelectric conversion and readout SIT which comprises a gate region operating as a photoelectric conversion area and a second reset SIT which comprises a region (drain or source) electrically connected to the gate region of the first SIT, whereby the photoelectric charges stored in the gate regions of the first SITs of the picture cells in a matrix can be individually reset by means of the related second SITs.
摘要:
A solid state image pickup device having a shutter function is disclosed. The device comprises a plurality of picture cells each having a static induction transistor arranged in a matrix. The device further comprises a plurality of gate signal lines for simultaneously supplying gate signals to the picture cells placed on respective rows of the matrix, a vertical scanning register for generating and scanning the gate signals, a plurality of signal readout lines for reading out light signals stored in the picture cells placed on respective columns of the matrix, a shift register for simultaneously and temporarily storing read out signals and converting them into time series signals, a device connected between the signal readout means and the temporary storage means for controlling the connection therebetween.
摘要:
A solid state image pick-up device having a number of static induction transistor image sensors arranged in a matrix form, each static induction image sensor includes a drain region formed by an n+ substrate connected to the earth potential, a channel region formed by an n.sup.- epitaxial layer grown on the substrate, a ring-shaped p+ gate region formed in a surface of the epitaxial layer, an n+ source region formed in a part of the surface of the epitaxial layer surrounded by the ring-shaped gate region and a p+ overflow drain region formed in the surface of the substrate underneath the gate region. By adjusting a time duration of a shutter control signal having a positive voltage applied to the overflow drain region, a time period during which photocarriers, i.e. electrons are flown into the gate region and stored therein, can be controlled at will, and an electronic shutter function can be achieved.
摘要:
A semiconductor memory is provided with a hook structure composed of first to fourth regions and is capable of non-destructive readout. The third and fourth regions of the hook structure are both made floating and each form one of main electrode regions of each of a write and/or refresh transistor and a readout transistor. Carriers which are injected from the other main electrode region of the write transistor are stored as excess majority carriers in the third region and majority carriers of the fourth region flow out therefrom into the first region via the third and second regions, in consequence of which the fourth region lacks in the majority carrier and voltages of the floating third and fourth regions vary. The voltage variation of the fourth region is read out by the readout transistor. The excess majority carriers stored in the third region flow out therefrom into the other main electrode region of the write transistor and become extinct when it operates as a refresh transistor.
摘要:
This invention relates to a PWM power converter for switching a plurality of bridge-connected semiconductor switching elements based on PWM signals. As the semiconductor switching elements, elements with a low ON voltage and small conduction loss, and elements with a small switching loss and capable of high-speed switching are combined to improve power conversion efficiency.
摘要:
The present invention relates to a semiconductor FET or SIT type photoelectric transducer comprising a source and a drain which are main electrode regions of high impurity density; a high resistivity or intrinsic semiconductor region of the same conductivity type as the main electrode regions and formed therebetween as a current path; and a plurality of gate regions formed by high impurity density regions reverse in conductivity from the main electrode regions and formed in the current path, for controlling a main current; wherein the distance W.sub.1 between a first one of the gate regions on both sides of the source and the source or the drain is greater than the distance W.sub.2 between the other gate region and the source or drain (W.sub.1 >W.sub.2), and wherein the size of the first gate region is smaller than the diffusion length of carriers to be stored in the first gate region. Briefly stated, the present invention is intended to enhance the function of the first gate by selecting the size of the first gate region for storing optical information within the diffusion length of the carriers stored therein, in addition to the selection of the aforementioned distances W.sub.1 and W.sub.2.
摘要:
A two-dimensional solid-state image pickup device wherein, in order to make it possible to have a high light detecting sensitivity even to feeble lights and to stably and uniformly detect picture images, picture elements each formed of a static induction transistor having an optical gain of 10.sup.6 to 10.sup.8 and able to detect even such feeble lights as of about 10.sup.-4 .mu.W/cm.sup.2 and a gate capacitor are arranged in a matrix to be a gate accumulating system capable of two-dimensional reading out, the source regions of the respective static induction transistors are connected to common source lines, the respective source lines are connected to the ground through parallelly connected source line selecting transistors and capacitors and the gates of the respective source line selecting transistors are connected respectively to vertical address lines so that, simultaneously with the selection of the vertical address lines, the source lines may be connected to the ground.
摘要:
An integrated light-triggered and light-quenched static induction thyristor and fabrication process thereof adapted in such a manner that an integrated SIPT operates in the normal mode in order to enhance current gain, tail current generated at the light-quenching time is reduced in order to enhance turn-off gain, and a buried-gate type of light-triggered static induction thyristor and a photo-darlington circuit composed of a first and second static induction phototransistors are integrated on a high-resistivity substrate in order to permit manufacturing said thyristor compact as a whole in facilitated processes.