摘要:
A matrix circuit acting as a read only memory (ROM) comprises first and second groups of input lines, a third group of input lines arranged between the first and second groups of input lines, a plurality of groups of output lines intersecting the input lines off the first, second and third group, each group of the output lines having one terminal commonly connected in a wired OR fasion to one end of a power source and having the other terminal commonly connected to the ground. A plurality of first switching elements are respectively connected to the output lines and selectively driven by an input signal supplied to the first group of the input lines, a plurality of second switching elements driven by the same input signal as that supplied to the first switching elements and respectively connected to the output lines each lying adjacent to the output lines connected with the first switching elements, and a plurality of third switching elements respectively connected between the adjacent output lines and selectively driven by an input signal supplied to the third group of input lines.
摘要:
An oscillator comprising an oscillation circuit including an oscillation transistor whose emitter is connected to the ground with respect to a D.C. signal; a detection circuit for detecting D.C. power source current supplied to said oscillation transistor; and a control circuit for controlling a D.C. bias voltage impressed on said oscillation transistor according to an output signal from the detection circuit, wherein the oscillation circuit, detection circuit and control circuit jointly constitute a negative feedback loop for sending direct current back to the source.
摘要:
A semiconductor R-S flip-flop circuit comprises first and second input terminals, first and second output terminals, a first integrated injection logic unit consisting of a first transistor acting as a switching element and a second transistor acting as an injector, and a second integrated injection logic unit consisting of a third transistor acting as a switching element and a fourth transistor acting as an injector. The R-S flip-flop circuit further includes a first diode having a cathode connected to the first input terminal and an anode connected to the base of the first transistor, a second diode having a cathode connected to the second input terminal and an anode connected to the base of the third transistor, a third diode having an anode connected to the base of the first transistor and a cathode connected to the collector of the third transistor, and a fourth diode having an anode connected to the base of the third transistor and a cathode connected to the collector of the first transistor.
摘要:
An address decoder comprises an OR circuit and a NOR circuit, the OR circuit having switching transistors to which decoder inputs and a chip enable signal are applied, a load transistory and a transistor for precharging a common precharge node by the complementary chip enable signal. The output of this OR circuit is applied to the NOR circuit with the complementary chip enable signal, the set-up time of the decoder or the NOR circuit being independent of the number of decoder inputs.
摘要:
An insulated-gate field-effect transistor having improved high-speed operation characteristics and high channel controllability includes a source region having first and second diffused regions and a drain region having first and second diffused regions. The first diffused regions of both the source and drain regions are formed by diffusion of a first impurity having relatively low diffusion coefficient and the second diffused regions of both the source and drain regions are formed by diffusion of a second impurity having relatively high diffusion coefficient.
摘要:
A charge transfer transversal filter, wherein an input signal to the filter is branched off; an electric charge is generated in a semiconductor substrate according to each branch of the input signal supplied thereto; the electric charge is so weighted as to cause the filter to have a desired frequency characteristic; an electric charge thus weighted is introduced into a potential well of one delay means of a charge transfer device to be added to the electric charge transferred to the well from the preceding delay means; and the resultant mixture of electric charges is transferred through the charge transfer device.
摘要:
Provided is an ultrasonic wave transmitting and receiving apparatus comprising a plurality of electro-acoustic conversion elements linearly arranged on a flat plane, means for selectively delaying an electrical signal being supplied to or an electrical signal being supplied from the electro-acoustic conversion element so that the ultrasonic wave beams emitted respectively from the electro-acoustic conversion elements may be substantially deflected and scanned to such an extent that the centers of the beams do not intersect each other within a range of field to be examined, a receiver for receiving the ultrasonic wave beam reflected within the field range, through the electro-acoustic conversion elements and the delay means, and means for displaying a picture image of an object to be examined in accordance with an electrical signal from the receiver by using equidistant and parallel scanning lines.
摘要:
The cathode electrode assembly of an electron gun assembly comprises an inner cathode cylinder supporting a base metal coated with an electron emitting material and an outer cathode cylinder coaxially supporting said inner cathode cylinder. Said outer cathode cylinder is supported at a first supporting point by a cathode holder fitted over said outer cathode cylinder. Said cathode holder is supported at a second supporting point by an electrode supporting piece supported by an insulating support pillar. Respective portions of the outer cathode cylinder and cathode holder are formed of the same quality of material.
摘要:
There are provided a transmitter for transmitting an ultrasonic wave pulse having a definite period toward an object to be examined, a receiver for receiving the ultrasonic wave pulse reflected by the object to produce a corresponding electric signal, a switch for selectively passing the electric signal produced by the receiver, a plurality of delay elements having different delay times and connected to receive the electric signal passing through the switch, and adders for adding the output signals of the delay elements after applying a predetermined weight thereto.
摘要:
A color cathode ray tube having color phosphor element strips spaced from each other by intervening light absorbing areas (black strips) which comprises an envelope; a faceplate; a phosphor screen formed on the inner wall of the faceplate; an electron gun unit so arranged in the neck portion of said cathode ray tube envelope as to emit in-line plural electron beams; and a slit-shaped aperture mask facing the faceplate, wherein the multicolor phosphor screen consists of a plurality of groups each consisting of several color phosphor element strips spaced from each other by a plurality of intervening light absorbing strips; and there is disposed adjacent to said color phosphor element strips a slit-shaped aperture mask perforated with a plurality of beam passing holes.