30 results about "Early effect" patented technology

In a constant voltage generating circuit and a reference voltage generating circuit, a band-gap circuit operates by using, not a power source voltage, but a constant voltage generated in a constant voltage circuit as a power supply voltage. The constant voltage circuit is equipped with a constant voltage circuit having transistors connected in series and a capacitor, and a transistor is equipped between a constant current circuit and the constant voltage circuit. Furthermore, transistors are added to prevent an early effect of the transistors in the constant current circuit.

A temperature sensor circuit and a compensation method for the temperature sensor circuit are disclosed herein. The temperature sensor circuit may provide a proportional-to-absolute temperature (PTAT) output signal with a compensation scheme. The temperature sensor circuit includes a first temperature sensor module circuit, a second temperature sensor module circuit, and an arithmetic operation circuit. The first temperature sensor module circuit generates a first temperature voltage signal based on a first reference current level. The second temperature sensor module circuit generates a second temperature voltage signal based on a second reference current level. The arithmetic operation circuit generates an output signal as PTAT voltage signal using the first temperature voltage signal and the second temperature voltage signal, eliminating reverse Early effect and High-level injection effect with simple arithmetic operation.

A method is provided for improving the performance of a circuit containing a three-terminal device. In the operation of a circuit containing three-terminal device 10, the influence of the Early effect pertaining to the three-terminal device of a FET is reduced. In order to reduce the influence, control unit 30 is set for reducing the Early effect component caused by a three-terminal device. As a result, by controlling the potential of the second terminal (such as drain) of the device as a response to a first signal pertaining to the input signal received by the first terminal (such as gate) of the device, it is possible for the potential difference between the second terminal (drain) and the third terminal (such as source) of the device to be essentially constant.

In an input transistor of current mirror circuit, it is intended to prevent the current generated by Early effects from appearing in the output current of the current mirror circuit. Having an Early voltage detector 22 of same connection and structure as a driver circuit 21 , and connected in parallel to the driver circuit 21 , the current flowing in input transistor Q 9 of the Early voltage detector 22 is detected. Output current (current IQ 11 ) of Early voltage detector 22 is added to input current (current IQ 5 ) of driver circuit 21 . As a result, in input current (current IQ 7 ) of current mirror circuit 25 , current alpha due to Early voltage effects can be canceled. At the same time, current alpha due to Early voltage effects generated in input transistor Q 5 of current mirror circuit 25 is prevented from appearing in output current (current IQ 8 ) of current mirror circuit 25.

In an input transistor of current mirror circuit, it is intended to prevent the current generated by Early effects from appearing in the output current of the current mirror circuit. Having an Early voltage detector 22 of same connection and structure as a driver circuit 21, and connected in parallel to the driver circuit 21, the current flowing in input transistor Q9 of the Early voltage detector 22 is detected. Output current (current IQ11) of Early voltage detector 22 is added to input current (current IQ5) of driver circuit 21. As a result, in input current (current IQ7) of current mirror circuit 25, current α due to Early voltage effects can be canceled. At the same time, current α due to Early voltage effects generated in input transistor Q5 of current mirror circuit 25 is prevented from appearing in output current (current IQ8) of current mirror circuit 25.

The invention discloses an evaporative cooling-condensation modular air conditioning unit for a data center computer room, which comprises a unit shell. The unit shell is internally provided with a mechanical refrigeration unit; one side of the mechanical refrigeration unit is provided with a return air unit, an early effect filter, a tubular indirect evaporative cooling unit, an evaporator, a direct evaporative cooling unit and an air supply unit sequentially; and the mechanical refrigeration unit and the evaporator are connected through a pipeline to form a closed loop. According to the evaporative cooling-condensation modular air conditioning unit for the data center computer room disclosed in the invention, evaporative cooling and mechanical refrigeration are combined, the stable operation performance of the unit is increased while the energy efficiency of the unit is improved, and continuous indoor cooling in summer is realized.

The invention discloses a temperature sensor calibration method against the reverse Early effect. The temperature sensor calibration method against the reverse Early effect comprises the following steps: applying an input voltage V<IN> to an ADC input terminal; calculating [Delta]V<BE>(T<1>) and V<BE>(T<1>) at a current first temperature according to the read ADC output at the first temperature; calculating [Delta]V<BE>(T<2>) and V<BE>(T<2>) at a current second temperature according to the read ADC output at the second temperature; and obtaining an actual temperature coefficient in the V<BE> by combining the [Delta]V<BE>(T<1>), the V<BE>(T<1>), the [Delta]V<BE>(T<2>) and the V<BE>(T<2>), and comparing with an ideal temperature coefficient to obtain a temperature coefficient error in the V<BE>. The temperature sensor calibration method against the reverse Early effect avoids the requirement of providing a high-precision temperature environment during the calibration of a high-precisionsensor, and reduces test condition requirements and test costs.

The invention discloses a bipolar device with high Erli voltage and a manufacturing method thereof. The bipolar device comprises three metal wires and a substrate. An N buried layer, a first epitaxiallayer, a second epitaxial layer and a SiO2 layer are sequentially arranged above the substrate; After the three metal wires pass through the lead-out holes arranged on the SiO2 layer, the lead-out region, the emitting region and the P-type base region of the current collector region are connected respectively. The lead-out region and P-type base region of the collector region are located in the second epitaxial layer, and the emitter region is located in the P-type base region. P-type isolation regions are arranged on both sides of the bipolar device. A main improvement of that method is thata first epitaxial process is carried out on the substrate to form a first epitaxial lay; Performing a second epitaxial process on the first epitaxial layer to form a second epitaxial layer; Through the design of double epitaxial layers, the Erli voltage can be increased effectively, the Erli effect can be reduced, and the precision of integrated circuit can be improved. At the same time, the threshold voltage of the parasitic PMOS transistor is increased, the metal wiring of the circuit is more convenient, and the working voltage range is enlarged.

The invention discloses a cylindrical filter screen for a fresh air fan, comprising a stepper motor, a driving gear, a filter screen support and a primary filter screen, the driving gear is mounted on the stepper motor, and the filter screen support It is in the shape of a hollowed-out cylinder, the filter holder is rotatably installed in the fresh air fan, the primary filter is bent into a cylindrical shape with a tooth shape, and the primary filter is detachably installed on the On the filter screen bracket, the primary filter mesh is meshed with the driving gear, and the cylindrical filter for the new fan can make full use of the entire effective area of ​​the primary filter, enhance the filtering effect, and improve the utilization rate of the primary filter.

The invention discloses an intelligent automatic water purification system based on a PLC controller, which solves the problems of the filter in the prior art, which needs to be stopped for maintenance after failure, the pipeline water pressure is too high to shorten the service life of the pipeline, the purified water is prone to backflow, and automation low level problem. The present invention comprises a water delivery pipe for purified water, a first primary effect filter, a first fine filter, a reverse osmosis tank, an activated carbon filter, a centrifugal pump, a second primary effect filter, a second fine filter, a waste water collection tank, and a water supply pipe , the first booster tube, the first booster pump, the second booster tube, the second booster pump, a check solenoid valve, a pressure sensor and a PLC controller. The invention can carry out fault maintenance online, can effectively reduce the pressure in the pipeline connecting the fine filter and the reverse osmosis tank, prolongs the service life of the pipeline, saves the use cost, can effectively prevent the backflow of purified water, and can effectively improve the performance of the reverse osmosis tank Excellent reverse osmosis effect to improve purification efficiency and high degree of automation.

The invention discloses a rice processing and screening equipment, which comprises a screening room and a dust removal box. The upper end of the side wall of the screening room is provided with an air suction port, and the air suction port is connected with the lower end of the side wall of the dust removal box through a fan. The screening room includes a primary effect screen, The medium-effect screen and the top cover on the top of the screening chamber, the top cover has a feed inlet, the primary-effect screen is located above the medium-effect screen, and the bottom of the primary-effect screen, the medium-effect screen and the screening room are all along the rice The sliding direction is inclined downward; the top cover also has several magnets, which are parallel to each other and have equal spacing. The lower surface of the top cover is provided with grooves matching the magnets. The inclination direction gradually inclines from the bottom surface of the groove to the top surface toward the center of the groove. The invention not only has high screening efficiency, greatly reduces manpower and production cost, but also can remove stones and metal scraps to ensure the safety of rice consumption.

A charge / discharge circuit creates a carrier detection level based on a received signal in a carrier detector circuit for detecting the presence or absence of a carrier in such applications as a receiver for an IR remote controller. The charge / discharge circuit operates to amplify a current, that is produced in N-type transistors QN1, QN2, QN3 and a reference current source, in a P-type transistor QP1. The amplified current is mirrored by a current mirror circuit to be supplied as an emitter current of a P-type transistor QP2. The charge / discharge circuit charges a capacitor with a small current, i.e., a base current of the P-type transistor QP2. The charge / discharge circuit includes a bias voltage source which produces such a bias voltage that the emitter-collector voltage of the P-type transistor QP1 becomes substantially equal to the emitter-collector voltage of the P-type transistor QP2. As a result, it is possible to limit an error of a charge current charged into the capacitor, which is caused by the emitter-collector voltage dependent change of the collector current and thus the base current, known as the Early effect.

The invention provides an air purifier, which comprises a closed box composed of a metal frame and a closed panel, a primary effect filter set from top to bottom in the closed box, a photocatalytic purification module, and a high-voltage electrostatic purification module and a smoke chamber arranged at the bottom of the airtight box, and a power supply device that provides driving power for the air purifier, wherein the airtight panel includes a display on at least one side of the airtight box for demonstration Transparent panel with air purification effect. Compared with the prior art, the beneficial effect of the present invention is that the air purification effect can be observed conveniently and intuitively, and the user experience is good.

A charge control structure is provided for a bipolar junction transistor to control the charge distribution in the depletion region extending into the bulk collector region when the collector-base junction is reverse-biased. The charge control structure comprises a lateral field plate above the upper surface of the collector and dielectrically isolated from the upper surface of the collector and a vertical field plate which is at a side of the collector and is dielectrically isolated from the side of the collector. The charge in the depletion region extending into the collector is coupled to the base as well as the field-plates in the charge-control structure, instead of only being coupled to the base of the bipolar junction transistor. In this way, a bipolar junction transistor is provided where the dependence of collector current on the collector-base voltage, also known as Early effect, can be reduced.

The invention discloses a modular electrostatic purification device, which comprises an air inlet box, a filter and an air outlet box. The air inlet box and the air outlet box are respectively installed on both sides of the filter. The filter part includes, an electric control part, a chassis, The primary effect filter, the micro-static ionization module and the micro-static dust collection module, the electric control part is arranged at one end of the chassis, and the primary effect filter, the micro-static ionization module and the micro-static dust collection module are sequentially arranged in the air inlet box inside the chassis Between the airflow channel and the air outlet box, the electric control part is electrically connected to the micro-static ionization module and the micro-static dust collection module through wires; the invention can make the air purification equipment generate less ozone and simultaneously collect impurities , Equipment maintenance and cleaning frequency is low.

The invention discloses an additive filter for cement production, the structure of which comprises a motor, a reducer, a switch valve, a sewage outlet, a suspension frame, a sewage chamber, a discharge port, a brush, a high-efficiency filter device, a feed port, Differential pressure controller, control circuit, drive shaft, barrel body, protective cover, the motor is connected to the reducer, the upper end of the sewage outlet is equipped with a switch valve, the high-efficiency filter device is equipped with a brush, and the lower end of the barrel body is welded to the feed port. The present invention is an additive filter for cement production. The drive shaft is driven by the power of the motor to rotate the high-efficiency filter screen device, and the electrons in the additive are adsorbed through the primary effect ion net, and the additive is carried out through the HEPA net. High-efficiency filtration filters tiny particles to ensure the safety of additives, effectively removes impurities in additives, improves the quality of additives, and improves the quality of cement, ensuring the safety of buildings.

The invention relates to a cleaning device for PDC drill bits. The cleaning device comprises a base, a rotary shaft and a disc. The base is provided with brake trundles. One end of the rotary shaft isconnected with the middle of the upper surface of the base, and the other end of the rotary shaft is fixedly connected with the middle of the disc. A first cleaning box, a second cleaning box and a third cleaning box are arranged on the upper surface of the disc, wherein openings are formed in the upper surface of the first cleaning box, the upper surface of the second cleaning box and the uppersurface of the third cleaning box. A drainage hole is formed in the bottom face of each cleaning box, and a filter screen is arranged at each drainage hole and comprises a rough filter layer, a primary-efficiency layer, an intermediate-efficiency layer, a high-efficiency layer and a purification layer which are sequentially arranged from the water inlet side to the water outlet side. A water inlethole is further formed in the side face of each cleaning box. Each drainage hole is connected with a drainage pipe. The drainage pipes are connected with a water collection box. Each water inlet holeis connected with a water inlet pipe. The water inlet pipes are connected with a water supply box. A water inlet pump is further connected to the water inlet pipes in series. The cleaning device hasthe beneficial effects that water can be effectively supplied in the cleaning process, cleaning continuity can be guaranteed, then the cleaning efficiency is improved, and cyclic utilization of waterresources can be achieved.

The invention relates to a drill bit cleaning system. The drill bit cleaning system comprises a base, a rotary shaft and a disc. The rotary shaft comprises a fixed shaft body and a telescopic shaft body. A pair of hinge pin holes is formed in the upper end of the fixed shaft body. A plurality of pair of positioning holes are formed in the lower end of the telescopic shaft body. Rest pins are inserted into the hinge pin holes and the positioning holes, so that the fixed shaft body and the telescopic shaft body are fixed together. The lower end of the fixed shaft body is connected with the middle of the upper surface of the base, and the upper end of the telescopic shaft body is located in a round groove. Three cleaning tanks with the upper surfaces open are arranged on the upper surface ofthe disc, drain holes are formed in the bottom surfaces of the cleaning tanks, and filter screens are arranged at the drain holes. Each filter screen comprises a rough filtration layer, a primary efficiency layer, a medium efficiency layer, a high efficiency layer and a purification layer which are sequentially arranged from the water inlet position to the water outlet position. Water inlets are further formed in the side faces of the cleaning tanks. The drain holes are connected with a water collection tank through a drain pipe, and the water inlets are connected with a water supply tank through a water inlet pipe. The drill bit cleaning system can be used for cleaning drill bits with different heights, water can be effectively supplied in the cleaning process, continuous cleaning is ensured, and the cleaning efficiency is improved accordingly.

The invention relates to a novel PCD drill bit cleaning device which comprises a base, a rotary shaft and a disc. The rotary shaft is fixedly connected with the base and the disc. Three cleaning boxeswith openings in the upper surfaces are arranged on the upper surface of the disc, a water drainage hole and a water inlet hole are formed in the bottom face and the side face of each cleaning box, awater drainage pipe is connected to each water drainage hole, and a filter screen is arranged at each water drainage hole. Each filter screen comprises a rough filtering layer, a primary-efficiency layer, a medium-efficiency layer, a high-efficiency layer and a purification layer which are sequentially arranged from the water inlet side to the water outlet side. Supporting frames are symmetrically hinged to the two sides of each of the upper end and the lower end of the rotary shaft correspondingly. The other ends of the supporting frames at the upper end are fixedly connected with the bottomface of the disc through lock pins. The other ends of the supporting frames at the lower end are fixedly connected with the upper surface of the base through lock pins. The novel PCD drill bit cleaning device has the beneficial effects that the occupied space can be reduced, transportation can be facilitated, and stability between the disc and the rotary shaft and stability between the base and the rotary shaft can be increased; and water can be effectively supplied in the cleaning process, cleaning continuity can be guaranteed, and then the cleaning efficiency can be improved.