30 results about "Early effect" patented technology

Amplifier systems are provided with bias generators that substantially stabilize operating points of system parameters (e.g., drain current and transconductance) over PVT variations, substantially reduce body effects and Early effects, and substantially reduce system output noise. These advantages are realized without significantly increasing system size and / or power consumption.

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.

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.

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.

A light-emitting device driving circuit capable of reliably performing emission control on a light-emitting device of a low emission threshold (about 10 mA or less) and capable of correcting a distortion due to the Early effect of a transistor in the drive current supplied to the light emitting device. The light limiting device driving circuit includes a current control unit (101) which controls the value of a main current based on a control voltage, a bias current source (CC1) for subtracting a bias current from the main current, and a switching unit (103) which controls emission of light from the light-emitting device by switching, based on the drive signal, a current obtained by subtracting the bias current from the main current or a current based on the current obtained by the subtraction.

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.

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.

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 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 relates to a cleaning device for a PDC drill bit, comprising a base, a rotating shaft, and a disc. The base is provided with casters with brakes. One end of the rotating shaft is connected to the middle of the upper surface of the base, and the other end is fixed to the middle of the disc. connection; the upper surface of the disc is provided with the first cleaning box, the second cleaning box and the third cleaning box with openings on the upper surface, and the bottom surface of each cleaning box is provided with a drain hole, and a filter screen is provided at the drain hole, and the filter screen It includes coarse filter layer, primary effect layer, medium effect layer, high efficiency layer and purification layer which are arranged sequentially from water inlet to water outlet; water inlet holes are also arranged on the side of each cleaning tank, and drain pipes are connected to the drain holes. The water collecting tank is connected, the water inlet is connected with a water inlet pipe, the water inlet pipe is connected with the water supply tank, and each water inlet pipe is also connected with a water inlet pump in series. The advantages of the present invention are that: the present invention can effectively supply water during the cleaning process, ensure continuous cleaning, further improve cleaning efficiency and enable water resources to be recycled.

The invention discloses a ventilation and dust-proof bookshelf, which comprises a bookshelf body and a door body. The interior of the bookshelf body is a cavity structure, a transverse partition is arranged in the cavity inside the bookshelf body, and a transverse sliding plate is arranged in the middle of the upper surface of the partition. The slide rail is provided with a slider that can slide along the slide rail, a baffle is arranged in the middle of the top surface of the slider, and a locking screw is arranged on the top surface of the slider on the non-working side of the baffle. The door body includes a left The door body and the right door body, the left door body and the right door body both include an inner door panel, an outer door panel and a filter screen arranged between the inner door panel and the outer door panel, the upper part of the inner door panel is provided with an air outlet, and the upper part of the outer door panel is provided with an air intake The filter screen includes a primary filter on one side of the outer door panel, a high-efficiency filter on one side of the inner door, and a medium-efficiency filter between the primary filter and the high-efficiency filter; the ventilation and dust-proof bookshelf can effectively To prevent the bookshelves from being damaged, the problem that the books that cannot be scattered on the partition cannot be scattered when the books cannot be filled.

The invention provides a new method for improving the Vibrio anguillarum antibody level in turbot eggs, which is characterized in that: (1) injecting the prepared vaccine to female turbot broodstock; (2) selecting female turbot broodstock Immunization is carried out in the period before spawning; (3) The cultivation conditions such as water temperature, light, and feeding are regulated, and management operations such as aeration and water change are adopted in time; Mature eggs containing high levels of Vibrio anguillarum antibodies were produced. The invention has beneficial effects: it can improve the immune resistance of the fertilized eggs of turbot, play a role in the disease prevention and control of early seedlings, reduce the breeding loss caused by diseases; avoid drug residues that may exist in the prevention and control of aquatic diseases by drugs , environmental pollution and other potential hazards; it is an effective way to realize the benefits of offspring through maternal immunization; it is easy to operate, strong in practicability, close to the actual production, and suitable for widespread promotion.

The invention belongs to the technical field of livestock and poultry breeding, and in particular relates to a pig house environment control system, which includes a pig house, an air supply pipe arranged in the pig house, a dung ditch arranged underground in the pig house, a waste gas collection pipe connected to the dung ditch, The main body of the heating and ventilation house connected to the pig house through the air supply pipe and the exhaust gas collection pipe. The main body of the heating and ventilation house includes a front wall panel, a rear wall panel, a left wall panel, and a right wall panel. There is a primary filter on the top, a medium filter on the right of the primary filter, a bellows heat exchange system on the right side of the medium filter, a temperature adjustment system on the right side of the bellows heat exchange system, and a bellows heat exchange system. The exchange system is connected with the waste gas collection pipe, and the partition in front of the bellows heat exchange system is provided with a wind-out wet curtain. This invention effectively reduces the concentration of harmful gases in the pig house, and at the same time enhances the efficiency of heating and ventilation in the pig house in winter and cooling and ventilation in summer. The effect is to improve the environmental quality of the pig house.

The invention discloses a high Early voltage bipolar device and a manufacturing method thereof. The bipolar device includes three metal wirings and a substrate; an N buried layer, a first epitaxial layer, a second epitaxial layer and SiO 2 layer; 3 metal wires pass through the SiO 2 After the lead-out hole set on the layer, respectively connect the lead-out region of the collector region, the emitter region and the P-type base region; the lead-out region of the collector region and the P-type base region are located inside the second epitaxial layer, and the emitter region is located in the P-type base region Inside; P-type isolation regions are set on both sides of the bipolar device. The main improvement of the method is that it includes performing the first epitaxial process on the substrate to form the first epitaxial layer; performing the second epitaxial process on the first epitaxial layer to form the second epitaxial layer; through the design of the double epitaxial layer, it can Effectively increase the Early voltage, reduce the Early effect, and improve the precision of the integrated circuit; at the same time, the threshold voltage of the parasitic PMOS tube is increased, the metal wiring of the circuit is more convenient, and the working voltage range is expanded.

The invention relates to a novel PCD drill bit cleaning device, which comprises a base, a rotating shaft, and a disc, and the rotating shaft is fixedly connected to the base and the disc respectively; the upper surface of the disc is provided with three cleaning boxes with openings on the upper surface, and each cleaning box The bottom surface and the side are provided with drain holes and water inlet holes, and the drain holes are connected with drain pipes, and the drain holes are provided with filter screens, which include a coarse filter layer, an initial effect layer, and a medium filter layer arranged in sequence from the water inlet to the water outlet. effect layer, high-efficiency layer and purification layer; a support frame is symmetrically hinged on both sides of the upper end and the lower end of the rotating shaft, the other end of the upper end support frame is fixedly connected with the bottom surface of the disc through a lock pin, and the other end of the lower end support frame is fixed through a lock pin. The pin is fixedly connected with the upper surface of the base. The advantages of the present invention are: the present invention can reduce the occupied space, facilitate transportation and increase the stability between the disk and the rotating shaft and between the base and the rotating shaft, and can effectively supply water during the cleaning process to ensure continuous cleaning. Thereby improving cleaning efficiency.

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.