摘要:
A circuit employable as a differential multiplexer (10, 310, or 610) or as a differential logic gate (110, 210, 250, 410, or 510) of either the OR/NOR or EXCLUSIVE OR/EXCLUSIVE NOR type contains four pass gates that operate on four circuit input signals and are controlled by two additional circuit input signals. Two of the pass gates drive a bipolar transistor serially coupled to a first FET driven from the other two pass gates. Likewise, the second pair of pass gates drive another bipolar transistor serially coupled to another FET driven from the first pair of pass gates. The bipolar transistors supply respective circuit output signals. The two FETs are of a first polarity. The circuit preferably includes a pair of FETs of a second polarity opposite to the first polarity. The second pair of FETs are arranged so as to provide output pull-up/pull-down assistance for the bipolar transistors.
摘要:
A semiconductor functional element is composed of at least one bifurcated branch conductive path coplanar with a heterojunction in a semiconductor with a band discontinuity that produces a potential well, and at least two gate electrodes designed for digital operations and a common electrode facing each other. The gate electrodes cross both paths and the two gate electrodes are located outside of one path and the common electrode is located outside the other path so that electron wave conditions at the heterojunction are locally influenced by an electric field which can be changed by selecting a gate electrode to apply a voltage thereby forming a logic or a functional circuit.
摘要:
Digital logic circuitry designed to operate on a low voltage power supply without substantial transistor saturation thereby achieving lower power and higher opeational speeds. A non-saturating inverter with a low voltage swing can be made with one transistor using standard bipolar production processes and without clamp diodes. The novel circuitry uses logic units which can be modularly combined to form various other logical functions such as inverters, gates, flip-flops, etc. The preferred logic units use a transistor with the base connected by a load resistor to a first current network. The logical input is between the load resistor and base. The emitter is connected either directly or via one or more resistors to a second current network. The first and second power networks are constructed and arranged to provide a voltage-varying profile across both networks which are preferably complementary to provide nearly constant differential voltages across the logic units. The differential voltages can be relatively low, such as less than 1 volt, thus providing low power operation. The power networks provide the biasing voltage for the logic units without separate biasing circuitry. The inverters, gates or other logical units are advantageously grouped into current balanced groups which conduct approximatley constant current between the power networks for a variety of logical code combinations. The total current flow is preferably balanced to be approximatley constant. A means for providing a relatively fixed amount of current matched to equal the balanced total current flow for the logic array is also preferably used. Also disclosed are preferred power networks, logic signal interconnect methods, a preferred gate array and methods for operating such circuits in non-saturating manners.
摘要:
A circuit responsive to pulses on first and second input signal lines for blocking the propagation of these pulses and inhibiting the production of corresponding pulses on output lines when pulses are present at the same time on the input lines and for producing output pulses corresponding to the pulses on the input lines when there is no coincidence or concurrence of pulses on the two input lines.
摘要:
A pulse train generator comprising a shift register with feedback for proing an output pulse for every m clock pulses applied to the shift register stages. The feedback shift register normally has a maximal length 2.sup.n -1, where n is the number of stages. Clock pulses are applied to the shift register until an all-ONE condition is reached; thereupon, (m-1) additional clock pulses are applied and the states of the register stages can then be sensed. False count correction is obtained by the combination of a detector and an analog integrator.
摘要:
Two input signals, each being at either of two different amplitudes, are coupled to respective Schottky-barrier gates of one transferred electron logic device (TELD) of relatively low transit-time frequency and coupled via a delay means to respective Schottky-barrier gates of another TELD of relatively high transit-time frequency. When the two input signals are at different amplitudes, the TELD connected via the delay means becomes biased to domain formation, thereby causing an output signal having a first value to be produced. When both input signals are at one of the amplitudes, the other TELD becomes biased to domain formation, thereby causing an output signal having a second value to be produced. When both input signals are of the other of the amplitudes, neither TELD is biased to domain formation, thereby causing an output signal having a third value to be produced.
摘要:
A tapered resistor heating element is provided which sequentially heats and actuates in a controlled fashion heat sensitive media. In one embodiment a tapered resistor heating element sequentially heats in a controlled fashion heat sensitive switches. Heat sensitive resistors and heat sensitive threshold switches may also be employed in this configuration. This system may be utilized as a meter relay or as described in another embodiment as a scanner. Novel exclusive OR gates are also disclosed which are employed in one embodiment of the scanner of the instant invention.BACKGROUND OF THE INVENTIONThis invention relates generally to scanning devices and more specifically to monolithic electronic scanning devices.It is known that a major problem with matrix addressed displays and the like is the requirement for numerous connections in their implementation between the matrix elements and the ancillary addressing and driving devices. For instance, a display panel with 10.sup.6 matrix elements requires about 2.times.10.sup.3 connections in order to be properly implemented. For devices which are raster scanned, the number of external connections can be greatly reduced provided that the scanning electronics are located on the matrix device panel itself. Such devices, however, are not well known in the art since simple, economical and radically new technologies have not been developed which would effectively allow the production of such devices.Now with the advent of tapered resistor technology more specifically defined in U.S. Ser. No. 747,167, entitled Tapered Resistor Device and filed concurrently herewith which is hereby respectfully incorporated by reference, such novel devices are possible with novel applications of such technology. In the instant recited application, a device is described comprising a tapered resistor element which develops a non-uniform temperature profile on electrical energization which is interacted after being energized with selected heat sensitive media to provide a number of very useful effects and devices which may be employed in a great many applications with ease, simplicity and greater economy than heretofore possible including the scanning apparatus of the instant invention.Generally described therein a conventional resistive device is seen to be a resistive film having a uniform thickness which has been formed into a resistor of a specified width and length. This film is then placed on an insulating substrate which is bonded to a heat sink. When an electrical current I is passed through the resistor the production of Joule heat causes a steady state temperature above ambient .DELTA.T which, if thermal fringing effects are neglected, may be theoretically defined by the relationship ##EQU1## IN WHICH D.sub.S AND K.sub.s are respectively the thickness and thermal conductivity of the substrate and .rho..sub.s is the sheet resistivity of the resistive material measured in ohms/square. (Note: .rho..sub.2 =.rho./d where .rho. is the bulk resistivity of the resistive material.) It is readily seen from this illustration that since the width of the resistor is uniform the local power dissipation and hence the temperature rise is also uniform so that no temperature gradient is established and the unique and utilizable effect of the device of the instant invention is not realized.However, as is seen in FIG. 2 of U.S. Ser. No. 747,167, a device may be provided including a resistive film which significantly has a varying width in the horizontal plane while the thickness remains uniform. This film may be placed on an insulating substrate 2 which in turn is bonded to a heat sink 3. Now it is seen that the width of the resistive element 1 is a monotonically increasing function of position along the length of the element or, in simple terms, the resistive element is tapered. In the event the slope of the taper is gradual over distances comparable with the substrate thickness, equation 1 recited above will still be applicable for a first approximation. When a tapered resistor is energized the local power generation will vary along the length of the resistor so that points of prescribed temperature rise can be made to move along the tapered resistor by varying the current flowing through the device.Although the non-uniformity of the width of the resistive film 1 may vary in any suitable fashion, it is assumed for purposes of this discussion that the taper is linear as is seen in FIG. 1 so that the following relationship is theoretically true:w=w.sub.o +bx .phi.
摘要:
An exclusive OR circuit comprises a primary winding having two input terminals and being closely coupled to first and second secondary windings. Rectifying diodes are connected to adjacent ends of the first and second secondary windings, which are adjacent the center of the primary winding. This configuration transmits an output pulse through one of the diodes only upon the application of one input pulse to one of the input terminals, and gives high speed voltage cancellation if coincident pulses are applied. In another embodiment, transistors used in place of the diodes give signal gain.
摘要:
Disclosed are an operation method of multiplier, an electronic device, and a storage medium. The method includes: determining a plurality of input data sets of the multiplier and an encoding manner for the multiplier; determining at least one low-order input data set in the plurality of input data sets; determining a carry compensation term corresponding to the at least one low-order input data set based on the at least one low-order input data set and the encoding manner; determining a target partial product array based on the carry compensation term corresponding to the at least one low-order input data set and the plurality of input data sets; and determining a product operation result for each input data set based on the target partial product array. According to this disclosure, multiplication operations with multiple precision may be implemented by using one multiplier, thereby reducing hardware resource consumption and hardware area.