50 results about "Reversible circuits" patented technology

The invention discloses a reversible gate movement method used for reversible circuit optimization. The reversible gate movement method includes the description of the novel reversible gate movement method, a method, established based on the movement method, for simplifying three kinds of sub-sequences and the detailed processes for optimization based on the methods in a reversible circuit. The reversible gate movement method has a few constraint conditions and is higher in adaptability, the movement range of reversible gates in the reversible gate circuit is enlarged, more gates in the sub-sequences capable of being simplified can be moved together to be simplified, and the problem that in the prior art, in the process of simplifying the reversible circuit, partial reversible gates can not be moved to be further optimized is solved. The novel reversible gate movement method and the simplifying method established based on the movement method are effectively supplements of an existing reversible gate movement method and an existing simplifying method, and the optimization effect of the reversible circuit can be further improved.

In a surface-mounted nonreciprocal circuit element having the structure in which a magnetic rotor is mounted on a substrate, the shape of the substrate is simplified, thereby suppressing manufacturingcost. The reversible circuit element (10) includes: a substrate (110); a magnetic metal layer (140) provided on the lower surface of the substrate (110); a magnetic rotor (M) provided on the upper surface of the substrate (110); a magnetic rotor (M) provided on the upper surface of the substrate (110); and a permanent magnet (40) that applies a magnetic field to the magnetic rotor (M).The magnetic metal layer (140) includes a lower yoke (147) provided at a position overlapping the magnetic rotor (M) in a plan view; and a plurality of terminal electrodes (141- 146) connected to the magnetic rotor (M).In this way, as the magnetic metal layer (140) provided on the lower surface of the substrate (110) functions as a lower yoke (147) and the terminal electrodes (141 to 146), there is no need to wind the lower yoke from the side surface of the substrate to the lower surface. The invention eliminates the need for processing such as partially reducing thickness of the substrate, so that the manufacturing cost can be suppressed.

The invention relates to a table type drilling and tapping dual-purpose machine tool for vehicle five-wheel fittings. The dual-purpose machine tool comprises a motor, a triangular belt, a machine tool main shaft, a main shaft lifting handle and a lifting mechanism, wherein the motor drives the machine tool main shaft to rotate through the triangular belt; and the main shaft lifting handle controls the lifting of the machine tool main shaft through the lifting mechanism. The dual-purpose machine tool further comprises an electric control box and a drilling and tapping changeover switch, wherein the electric control box and the drilling and tapping changeover switch are both fixed on the side wall of the lifting mechanism; a motor reversible circuit is arranged in the electric control box, and is connected with the motor; two travel limiting blocks are arranged on the main shaft lifting handle; the drilling and tapping changeover switch is started; the motor reversible circuit controls forward and reverse rotation of the motor to realize the conversion of drilling and tapping functions; and the two travel limiting blocks limit the drilling and tapping distance. Compared with the prior art, the dual-purpose machine tool has such advantages as high rigidity, long service cycle and high efficiency.

A compact non-reciprocal circuit device capable of handling a high power without impairment of the characteristics. The non-reciprocal circuit device contains a magnetic substrate that exhibits anisotropic behavior by application of a direct-current magnetic field. On the surface of the substrate, strip-lines are disposed at an angle, being insulated with each other. One end of each strip-line is grounded, and the other end of each is connected through a capacitor to a ground. Of the ends connecting the capacitors, one end connects to a termination resistor; the remaining ends connect each to an input terminal and an output terminal. The non-reciprocal circuit device exhibits non-reciprocal characteristics between the input and output terminals. The case of the device contains an insulating thermal conductor that serves as a heat-radiator for the termination resistor and the strip-lines.

A combinatorial key-dependent network suitable for the encryption / decryption of data on buses and in memories of data-processing devices, has a number of layers, where each layer has a number of elementary building blocks operating on very small block sizes. A generic building block acts on a small number of input data bits, which are divided into two groups of m and n bits, respectively. The m input bits, which are passed to the output intact, are used to select k out of 2mk key bits by a multiplexer circuit; the k bits are then used to select an (n×n)-bit reversible transformation acting on the remaining n input bits to produce the corresponding n output bits. The total number of the key bits in the building block is thus 2mk, which can easily he made larger that m+n. An inverse building block is the same except that the reversible transformations are replaced by their inverses.

The invention provides a method for realizing a quantum secret key expansion module used in an AES hardware encryption system, and belongs to the technical field of information security. The technical solution is: a method for realizing a quantum secret key expansion module for an AES hardware encryption system, comprising the following steps: step A, realization of g function; step B, realization of secret key expansion algorithm. The beneficial effects of the present invention are: the secret key expansion module of the present invention is realized by the quantum reversible circuit structure, which can increase the complexity of the secret key expansion algorithm (2 n -1)! Times, mainly for the operation of 128-bit seed secret key, operate on the 16-byte secret key, expand and generate a new first round of 16-byte secret key, and then perform operations on the first round of secret key to obtain the second round of secret key In this way, ten rounds of secret keys are obtained, which provide secret keys for the encryption and decryption process in the AES hardware encryption system based on quantum circuits, and improve the encryption effect and complexity of the AES hardware encryption system.

The invention proposes a novel reversible circuit synthesis method based on an ESOP representation model, which relates to the technical field of comprehensive design of reversible circuits and quantum circuits; the method first uses SFDD to represent a multi-output Boolean function F, and identifies the linear variables of each output function of F ; Then use the weighted bipartite graph to assign linear variables to each output function, and then use SFDD to detect the independence of linear variables and sort the output functions that successfully assign linear variables to determine the order in which the output functions are synthesized; According to the sorting results, based on the MPMCT gate A library that uses ESOP to represent model-synthesized reversible circuits. The invention solves the problem that the qubit number of the circuit obtained by synthesizing the reversible circuit based on the ESOP representation model is relatively high, and aims to reduce the qubit number of the circuit obtained by synthesizing the reversible circuit based on the ESOP representation model.

The invention provides an implementation method of an AES hardware encryption system based on a quantum reversible circuit, which belongs to the technical field of information security. The technical solution is: an AES hardware encryption system based on a quantum reversible circuit, including a quantum reversible circuit encryption and decryption module, a quantum secret key expansion module and a multi-interface selection module; the implementation method includes the following steps: realizing the quantum reversible circuit encryption and decryption module Hardware setting, complete the hardware setting of the quantum secret key expansion module, and use the electronic circuit to set the multi-interface selection module. The beneficial effects of the present invention are: the encryption and decryption module based on the quantum reversible circuit is combined with the quantum secret key expansion module according to algorithm rules to construct an encryption system based on the quantum reversible circuit, and the complexity of encryption is (2 n -1)! times, improve the encryption effect and anti-attack ability, and the multi-interface selection module can be connected with various interface devices to complete the encryption and decryption operations of various forms of information.

Provided is an irreversible circuit element small in mounting area and having a terminal good in solderability and free from rusting. In the irreversible circuit element such as an isolator (1), a magnetic assembly having a common electrode and a center conductor attached to a plate-like magnetic material and a permanent magnet are stored in an enclosure (20) formed into a rectangular parallelepiped approximately, and dimensions (L) of the longer side of the enclosure (20) is <=3.5 mm, and an independent terminal connected to the center conductor is arranged in an outline (20a) of the enclosure (20).

The invention discloses a reversible gate moving method for reversible circuit optimization, including the description of the new reversible gate moving method, three sub-sequence simplification methods based on the moving method, and finally gives the reversible circuit based on these methods The specific process of optimization. The reversible gate moving method provided by the present invention has fewer constraints and stronger applicability, and makes the moving range of the reversible gate in the reversible circuit larger, and can move more gates in reducible subsequences together for reduction It solves the problem that some reversible gates cannot be further optimized because they cannot be moved in the simplification of the original reversible circuit. The new reversible gate movement method and the simplification method based on it are effective supplements to the existing reversible gate movement and simplification methods, and can further improve the optimization effect of reversible circuits.