Static random access memory

The invention relates to a static random access memory which comprises a latch circuit, a first switch circuit, a second switch circuit, a third switch circuit and a sensing amplifier, wherein the latch circuit is provided with a first access end and a second access end; the first switch circuit is provided with a first bit transmitting end which is coupled to the first access end and a second bit transmitting end; the second switch circuit is provided with a third bit transmitting end which is coupled to the second access end and a fourth bit transmitting end which is coupled to the second bit transmitting end; the third switch circuit is provided with a fifth bit transmitting end which is coupled to the fourth bit transmitting end and a sixth bit transmitting end which is coupled to a bit line; the sensing amplifier is coupled to the bit line and used for judging a bit value transferred by the bit line; and in a data writing mode, the first switch circuit and the second switch circuit ...

Ultra-fine cone electrode array and method for manufacturing same

The invention relates to an ultra-fine cone electrode array and a method for manufacturing the same. The method for manufacturing the nano-size ultra-fine cone electrode array comprises the following steps: oxidizing a silicon slice with the wet process and the dry process to form an SiO2 film on the silicon slice, and photoetching a rectangular window on the SiO2 film by using positive photoresist; etching the silicon slice exposed in the rectangular window on the SiO2 film with the wet process by using the TMAH solution to form a pit in the rectangular pyramid shape, and removing the left SiO2 film; thermally oxidizing the silicon slice at 950 DEG C to form an SiO2 film, sputtering ultra-fine electrode material on the surface of the silicon slice, which is provided with the pit, with the radio-frequency magnetron sputtering process, and forming a ultra-fine electrode position and a lead wire pattern with the photoetching process and the etching process; depositing an Si3N4 film on the ...

Catalyst for fixed bed hydrogenation for continuous production of fatty alcohol, preparation method thereof and application thereof

The invention discloses a catalyst for fixed bed hydrogenation for continuous production of fatty alcohol. In the catalyst, copper and zinc are used as active components, one or more of manganese, barium or zirconium are used as a cocatalyst, and silicon and aluminum are taken as a structural promoter. Measuring by oxides, the content of the active components is 40 to 95 percent by mass; the content of the cocatalyst is 1 to 30 percent by mass; and the content of the structure promoter is 0.01 to 50 percent by mass. The catalyst has the advantages of environmentally friendliness, high activity, high selectivity, long service life and capability of catalyzing the fixed bed hydrogenation under a relatively low pressure for producing the fatty alcohol.

Data frame storage management device

The invention discloses a data frame storage management device, and relates to data frame processing technology. The data frame storage management device comprises three parts, namely an inlet fragmentation device, a fragmentation write and read device and a sub-unit management device of a public storage, wherein the inlet fragmentation device caches a data stream, extracts the data stream in a fragmentation mode into fragmented data and sends the fragmented data to the fragmentation write and read device; the fragmentation write and read device writes the fragmented data into the storage according to sequence signals of a timing control circuit, or reads the fragmented data from the storage; and the sub-unit management device of the public storage controls the read-write operation of the fragmentation write-in and read-out device. The data frame storage management device divides the storage into a plurality of basic storage units which serve as basic units for storage, can be allocated ...

Acid-proof catalyst for preparing gamma-valerolactone from levulinic acid, preparation method and application

An acid-proof catalyst for preparing gamma-valerolactone from levulinic acid is characterized by comprising the following components in percentage by mass: based on an oxide, 10 to 70 percent of active component, 0.05 to 20 percent of catalyst accelerator, and the balance of carrier. The acid-proof catalyst has the advantages of low cost, simple process, easy operation, high product yield rate and high safety in a production process.

Level detection circuit device for optical fiber communication limiting amplifier

A electric level detection circuit used on frame-limit amplifier of optical fiber communication consists of power detection circuit for sampling inputted signal and for sending sampled signal to delay comparator, reference circuit for generating reference level being sent to delay comparator, delay comparator for comparing sampled signal to reference signal, temperature compensation circuit for carrying out temperature compensation on delay comparator, automatic-muting circuit for shielding input noise signal being less than threshold and output buffer circuit for amplifying output signal of automatic-muting circuit for making output signal be stable static level.

Catalyst for preparing gamma-valerolactone by alpha-angelica lactone, preparation method and application

The invention relates to a catalyst for preparing gamma-valerolactone by alpha-angelica lactone, which is characterized by comprising the following components by weight percent calculated by oxide: 0.5-15% of active component, 0.05-20% of catalyst accelerator and the balance of carrier. The invention has the advantages of low cost, simple process, easy operation, high product yield and good safety in the production process.

Acid-proof catalyst for preparing gamma-valerolactone from levulinic acid, preparation method and application

An acid-proof catalyst for preparing gamma-valerolactone from levulinic acid is characterized by comprising the following components in percentage by mass: based on an oxide, 10 to 70 percent of active component, 0.05 to 20 percent of catalyst accelerator, and the balance of carrier. The acid-proof catalyst has the advantages of low cost, simple process, easy operation, high product yield rate and high safety in a production process.

Catalyst of succinic acid dicarboxylic ester and preparation method thereof

The invention discloses a catalyst of succinic acid dicarboxylic ester. The catalyst consists of the following components in percentage by weight: 5 to 25 percent of nickel serving as an active ingredient, 0.5 to 8 percent of aid and the balance of carrier, wherein the carrier is alumina, silicon oxide, silicon-aluminum composite oxide or active carbon; and the aid is one of Na, K, Ca, Mg, Mn, Baor Cu. The catalyst is prepared by an immersion method. The catalyst has the advantages of high heat stability, high activity and high selectivity.

Verifying environment patterned chip verifying method and device

The invention discloses verifying environment patterned chip verifying method and device, and relates to the field of electronic design automation (EDA) verification in a chip designing process. The method comprises the following steps: establishing a new test sample, grouping test points according to functions, automatically generating an input document required by chip verification in a patterning mode, and configuring parameters of a simulator; running the test sample, directly interacting with the simulator, and displaying encoding and simulating information of the simulator in a graph mode; observing the test result, verifying the next test sample if the test is successful; and performing regression testing after codes are modified if a fault sample is found. By utilizing the method,the patterning operation and management of chip verification can be realized, the time spent in studying new verification language by testing staff is saved, and the chip verification process becomessimple ...

Catalyst for preparing gamma-valerolactone from alpha-angelica lactone, and preparation method and application thereof

The invention provides a catalyst for preparing gamma-valerolactone from alpha-angelica lactone, which is characterized by comprising the following components in percentage by mass of oxide: 10-90% of an active component, 0.05-20% of a cocatalyst and a carrier. The method has the advantages of low cost, simple technique, easy operation, high product yield and high safety in the production process.

Method for preparing succinate

The invention discloses a method for preparing succinate. The method comprises the following steps of: mixing hydrogen and maleic acid ester, and performing hydrogenation with a fixed bed reactor filled with a hydrogenation catalyst to obtain the succinate; and partially circulating the generated succinate, mixing with the maleic acid ester to obtain raw materials, and feeding a product subjectedto hydrogenation into a gas-liquid separator to obtain succinate with content of over 99.6 percent, wherein the separated hydrogen can be recycled. The method has the advantages that: raw materials are diluted in a reaction product circulation mode, so that temperature runaway caused by hydrogenation heat release can be effectively avoided, by-products of the reaction is very few, and the servicelife of the catalyst is prolonged and the stability of the catalyst is improved.

Ultra-fine cone electrode array and method for manufacturing same

The invention relates to an ultra-fine cone electrode array and a method for manufacturing the same. The method for manufacturing the nano-size ultra-fine cone electrode array comprises the following steps: oxidizing a silicon slice with the wet process and the dry process to form an SiO2 film on the silicon slice, and photoetching a rectangular window on the SiO2 film by using positive photoresist; etching the silicon slice exposed in the rectangular window on the SiO2 film with the wet process by using the TMAH solution to form a pit in the rectangular pyramid shape, and removing the left SiO2 film; thermally oxidizing the silicon slice at 950 DEG C to form an SiO2 film, sputtering ultra-fine electrode material on the surface of the silicon slice, which is provided with the pit, with the radio-frequency magnetron sputtering process, and forming a ultra-fine electrode position and a lead wire pattern with the photoetching process and the etching process; depositing an Si3N4 film on the ...

Catalyst of succinic acid dicarboxylic ester and preparation method thereof

The invention discloses a catalyst of succinic acid dicarboxylic ester. The catalyst consists of the following components in percentage by weight: 5 to 25 percent of nickel serving as an active ingredient, 0.5 to 8 percent of aid and the balance of carrier, wherein the carrier is alumina, silicon oxide, silicon-aluminum composite oxide or active carbon; and the aid is one of Na, K, Ca, Mg, Mn, Ba or Cu. The catalyst is prepared by an immersion method. The catalyst has the advantages of high heat stability, high activity and high selectivity.

Writing system for static random access memory and memory

The invention provides a writing system and a memory. The writing system is applied to the static random access memory. A simulation write circuit, a negative pulse voltage control circuit and at least one conventional write circuit are arranged in the writing system; and each conventional write circuit comprises a write driving circuit and a negative pulse voltage supply circuit. In the writing process, the simulation write circuit drives a simulation bit line to change the electric potential thereof, so the negative pulse voltage control circuit generates a negative pulse voltage control signal according to the electric potential of the simulation bit line. In each conventional write circuit, when the write driving circuit switches on a corresponding conventional bit line to a bias voltage end to drive the electric potential of the corresponding conventional bit line to change, the negative pulse voltage supply circuit can switch on the bias voltage end from a working voltage to a different ...

Hydrogenation catalyst, its process and use

A hydrogenation catalyst and its preparation and use are disclosed. The said catalyst consists of NiO 10-30wt.% and Al2O3 70-90wt.%, obtained by: drying quasi-hydrated aluminum oxide powder, passing steam to ream, roasting to have macroporous aluminum oxide carrier, dipping it in a solvent containing nickel compound, filtering, drying, roasting to form the final product. It is suitable for fractional oil containing dialkene and styrene and their derivatives to directly prepare solvent with high aromatic hydrocarbon and gasoline with high octane level by hydrogenation.

Acid-resistant catalyst for preparing gamma-valerolactone, preparation method and application thereof

The invention discloses an acid-resistant catalyst for preparing gamma-valerolactone, which, based on oxide, comprises the following components: 0.5 to 15 mass percent of active components, 0.05 to 20 mass percent of co-catalyst, and the balance of carrier. The acid-resistant catalyst has the advantages of low cost, simple process, easy operation, high product yield, and good safety of production process.

Acid-resistant catalyst for preparing gamma-valerolactone, preparation method and application thereof

The invention discloses an acid-resistant catalyst for preparing gamma-valerolactone, which, based on oxide, comprises the following components: 0.5 to 15 mass percent of active components, 0.05 to 20 mass percent of co-catalyst, and the balance of carrier. The acid-resistant catalyst has the advantages of low cost, simple process, easy operation, high product yield, and good safety of productionprocess.

Data frame storage management device

The invention discloses a data frame storage management device, and relates to data frame processing technology. The data frame storage management device comprises three parts, namely an inlet fragmentation device, a fragmentation write and read device and a sub-unit management device of a public storage, wherein the inlet fragmentation device caches a data stream, extracts the data stream in a fragmentation mode into fragmented data and sends the fragmented data to the fragmentation write and read device; the fragmentation write and read device writes the fragmented data into the storage according to sequence signals of a timing control circuit, or reads the fragmented data from the storage; and the sub-unit management device of the public storage controls the read-write operation of the fragmentation write-in and read-out device. The data frame storage management device divides the storage into a plurality of basic storage units which serve as basic units for storage, can be allocated ...

Hydrogenation adsorption desulphurization and catalytic hydro-dearomatization cascade reaction process

The invention discloses a cascade reaction process for hydrogenation adsorption desulfurization and hydro-dearomatization. A hydrogenation adsorption catalyst and a hydro-dearomatization catalyst are directly and serially filled, and a raw material is removed with sulfide through the hydrogenation adsorption catalyst under the condition of hydrogenation adsorption, and then is removed with aromatic hydrocarbon through the hydro-dearomatization catalyst under the condition of hydro-dearomatization. The process has the advantages that no hydrogen sulfide is generated in a first reactor, and thecontent of the sulfide in a product is lower, thereby prolonging the using period of a second hydro-dearomatization catalyst, reducing operation cost, reducing equipment, and saving the investment.

Catalyst for preparing gamma-valerolactone from alpha-angelica lactone, and preparation method and application thereof

The invention provides a catalyst for preparing gamma-valerolactone from alpha-angelica lactone, which is characterized by comprising the following components in percentage by mass of oxide: 10-90% of an active component, 0.05-20% of a cocatalyst and a carrier. The method has the advantages of low cost, simple technique, easy operation, high product yield and high safety in the production process.

Integrated transfer resistance amplifier with auto-gain control