8979 results about "Triode" patented technology

The invention provides a fully-automatic screw locking machine for a radiator. The fully-automatic screw locking machine comprises a rack, as well as a radiating fin loading mechanism, a triode loading mechanism, a screw loading mechanism, a screw locking mechanism, a screw detection mechanism for detecting installation missing of screws, a forming mechanism, a forming and foot-cutting mechanism, an unloading mechanism and a multi-station rotary disc mechanism which are installed on the rack respectively, wherein the radiating fin loading mechanism, the triode loading mechanism, the screw locking mechanism, the screw detection mechanism, the forming and foot-cutting mechanism and the unloading mechanism are sequentially distributed at the periphery of the rotary disc of the multi-station rotary disc mechanism along the rotation direction of the rotary disc, and are orderly and respectively matched with corresponding station clamps on the rotary disc; and the screw loading mechanism is arranged at one side of the screw locking mechanism, and matched with the screw locking mechanism. The fully-automatic locking screw machine provided by the invention can be used for automatically sequencing, assembling, screw locking, forming and discharging after radiating fins are placed in a radiating fin vibration disc in batches, whole triodes are placed in a triode feeding slide way, and screws are placed in a screw vibration disc in batches.

The invention relates to a protection circuit driven by insulated gate bipolar transistor (IGBT). It is composed of power supply, IGBT, a signal circuit driven by upper and lower bridges, light coupler, a control circuit with a switch triode, an amplifying circuit for driving signal, a protection circuit for detecting and adjusting the voltages between collector and emitter of IGBT. Said protection circuit includes a short circuit protection circuit, fault latching circuit and fault soft switch off circuit. When the voltage of collector-emitter of IGBT is abnormal, the voltage of insulated gate of IGBT is adjusted to lower than threshold voltage, by the operation of short circuit protection circuit as well as control and amplifying circuit. Thus the IGBT is cut-off and the close latching is realized by that fault latching circuit. It guarantees to close off IGBT before CPU receives the fault signal and closes off driving signal.

The invention belongs to the electronic technique field and storage battery charging, and relates to an intelligent charger for a storage battery of an electric vehicle. The intelligent charger for the storage battery consists of 220V alternating current, a power transformer T, a full-wave rectification circuit, a pulse direct current indicating circuit, unidirectional controllable silicon and a trigger circuit thereof, a biasing circuit of a PNP triode VT1, a charging output terminal and a charging state indicating circuit. The intelligent charger for the storage battery of the electric vehicle has multiple protective functions of preventing a polar plate of the storage battery from falling off or electrodes of the storage battery from being disconnected, preventing the storage battery from being subjected to short circuit, preventing inverted connection of a positive electrode and a negative electrode of the storage battery, preventing nominal voltage of a storage battery module from being deflected, preventing the polar plate of the storage battery from being subjected to lead sulfate formation, charging quickly, self-stopping until the storage battery is full of power and the like, so that a great convenience is supplied to a storage battery user; and the intelligent charger is suitable to be extensively used by an electric vehicle user and also suitable for developing charging and maintenance services in a shop or a stall.

A programmable control unit for a vacuum cleaning system, such as central vacuum cleaning system. A control unit is programmed after manufacture to execute a particular control program for performing various diagnostic and operational functions including user interface, voltage level detecting, voltage monitoring, current monitoring, user interface, power supply control, temperature monitoring, AC line frequency detection, operation data recording, speed control program selection, expansion bus interface and service tool interface. Power control to the vacuum motor is facilitated by the control unit directly through a triode for alternating current (TRIAC). Manufacturing costs are reduced by producing a single programmable control unit that can be programmed with a control program corresponding to a variety of different vacuum cleaning devices across a manufacturer's product line.

This invention relates to a piezoelectric ceramics driver circuit used for regulating optical fiber stress. It is composed of three parts: Part 1, the voltage amplifier stage circuit, comprising: a constant-current source circuit composed of triode Q1 and resistances R1, R2 and R3; a feedback comparator composed of R4, R5 and R6, and Q2, Q3; and a regulating tube Q4; Part 2, the power amplifier stage circuit, comprising: a selected high power and high voltage-resisting N-channel VMOS tube IRF830 substituted for the existing complementary symmetric circuit; and Part 3, the discharging 100p circuit, comprising: diodes D1, D2 and triode Q5 and a comparator. This invention has advantages of: simple structure, low energy consumption, small volume, stable working, safety, excellent dynamic response to non-regulated signals, quick response, wide response frequency range.

The invention relates to an automobile headlamp automatic control system based on machine vision. The automobile headlamp automatic control system is characterized in by comprising a camera arranged at the inner side of a windscreen in the front of an automobile, wherein the camera is connected with a DSP (Digital Signal Processor) control system arranged on a central control panel of the automobile through a data line, an output end of the DSP control system is connected with a triode, the triode is connected with a control end of a relay, another control end of the relay is connected to a power supply of the automobile, and contacts of the relay are connected in a headlamp control circuit of the automobile in series; the camera collects the information of road lamps at the two sides of a road and the lamp information of automobiles in an opposite direction in real time and sends collected color images to the DSP control system, the DSP control system analyzes and processes pixels in the road lamp zone and the automobile lamp zone and sends control commands to the triode according to processed results, and the triode controls the relay to pull in and disconnected so as to control the automobile to be switched between a high beam lamp and a dipped headlamp. The system can be broadly used for the switch control of the headlamp of the automobile running at night.

A CMOS structure including a Slim spacer and method for forming the same to reduce an S/D electrical resistance and improve charge mobility in a channel region, the method including providing a semiconductor substrate including a polysilicon gate structure including at least one overlying hardmask layer; forming spacers selected from the group consisting of oxide/nitride and oxide/nitride oxide layers adjacent the polysilicon gate structure; removing the at least one overlying hardmask layer to expose the polysilicon gate structure; carrying out an ion implant process; carrying out at least one of a wet and dry etching process to reduce the width of the spacers; and, forming at least one dielectric layer over the polysilicon gate structure and spacers in one of tensile and compressive stress.

Various methods and circuital arrangements for biasing one or more gates of stacked transistors of an amplifier are presented, where the amplifier can have a varying supply voltage that varies according to a control voltage. The control voltage can be related to a desired output power of the amplifier and/or to an envelope signal of an input signal to the amplifier. Particular biasing for selectively controlling the stacked transistors to operate in either a saturation region or a triode region is also presented. Benefits of such controlling, including increased linear response of an output power of the amplifier, are also discussed.

A voltage reference source with high-order temperature compensation circuit belongs to the electronic technical field. The voltage reference source comprises a starting current and positive temperature coefficient current generating circuit, a negative temperature coefficient current generating circuit, a high-order temperature compensation current generating circuit and a superimposition and summation output circuit. The added high-order temperature compensation current generating circuit performs linearization to the breakover voltage VBE between the voltage of the base and emitter of a triode to obtain a high-order compensation amount which is in agreement with the high-order temperature amount of the PN junction voltage, and the high-order temperature coefficient of the PN junction voltage can be eliminated fundamentally after proportional offset, thus realizing a CMOS voltage reference source with the lower temperature coefficient. The voltage reference source is prepared by the common CMOS technology with lower cost, has extremely low temperature coefficient, less power consumption and smaller area, and can be used in the reference circuits such as analog circuits and digital-analog hybrid circuits which are required to have low temperature coefficients.

The invention discloses a sectional linear temperature compensating circuit and a temperature compensating voltage reference source. The sectional linear temperature compensating circuit consists of resistances and a triode, wherein the number of resistances is at least two; the base electrode of the triode is connected with the input port to constitute an input end. One end of a first resistance is connected with the input port, and the other end is connected with a ground wire; the emitting electrode of the triode is connected with the ground wire through a second resistance, and the collector electrode of the triode constitutes an output end. In the voltage reference source, the band-gap reference source and the input end of a positive-temperature coefficient electric current generating circuit are connected with a summing output circuit and a sectional linear temperature compensation circuit respectively. The output end of the sectional linear temperature compensating circuit is connected with the summing output circuit. The invention reduces the impact of resistance temperature on the output amount and has good process compatibility and temperature stability.

A method of manufacturing a triode field emission cold cathode device having randomly distributed field emission emitters comprising the steps of providing a substrate (10), depositing a first conductive layer (11) on the substrate, spraying the preceding layer with a random pattern of masking material (20), depositing an insulating layer (13) on the masked preceding layer, depositing a second conductive layer (14) on the insulting layer, and removing the masking material. A triode field emission cold cathode device having randomly distributed field emission emitters is also provided.

The invention relates to a radiation-proof self-recovery over-current/short-circuit protection circuit for a satellite. On the basis of a line structure, the self-recovery over-current/short-circuit protection function is realized. Moreover, the circuit has advantages of reasonable design, small size, and light weight. The radiation-proof self-restoring over-current/short-circuit protection circuit is composed of a power supply module, a triode driver module, a VDMOS tube module including a VDMOS tube Q2, a current detection, amplifier and comparator module, a trigger feedback module having a D trigger U3, and a precision sampling resistor RS1 connected in series to a bus. The power supply module is used for providing power for the current detection, amplifier and comparator module and the trigger feedback module through buses. The input terminal of the triode driver module is connected with an input signal of the control circuit and the output terminal is connected with a gate terminal of the VDMOS tube Q2; and a source end of the VDMOS tube Q2 is connected with the bus by the precision sampling resistor RS1 and a drain end is grounded by a resistor R13. The current detection, amplifier and comparator module consists of a current detection chip U1 for current detection and signal amplification and a comparator U2.

The invention discloses a self-exited push-pull converter, comprising an input soft starting circuit, a bipolar push-pull circuit, a coupling transformer and an output filter circuit, wherein the input soft starting circuit, the bipolar push-pull circuit, the coupling transformer and the output filter circuit are connected in order; the bipolar push-pull circuit comprises two triodes and a high frequency self-exited suppression circuit, wherein the two triodes are in push-pull connection; the emitters of the two triodes are grounded; the bases of the two triodes are respectively connected with two ends of a feedback winding of the coupling transformer; the collectors of the two triodes are connected with two ends of a primary winding of the coupling transformer; the high frequency self-exited suppression circuit is used for removing sine vibration generated due to high characteristic frequency when the triodes are electrified; and the high frequency self-exited suppression circuit is connected in the bipolar push-pull circuit. The self-exited push-pull converter can effectively control high frequency vibration.

The invention relates to an improved gate drive device for SiC MOSFET bridge crosstalk suppression, belonging to the technical field of SiC driving. The device includes a main drive circuit and a passive auxiliary circuit, the main drive circuit is composed of a DC-DC converter unit, an optocoupler isolation chip unit, a drive chip unit and a drive resistor unit, and the passive auxiliary circuit is composed of a forward peak voltage suppression unit and an inverse peak voltage suppression unit. The invention provides a novel auxiliary circuit improved driving method additionally provided with a triode serial capacitor on the basis of a conventional drive circuit. Through the reasonable design of the main drive circuit and the passive auxiliary circuit, the aims of bridge crosstalk suppression, switch time-delay time shortening, switch loss reduction, and control complexity reduction can be achieved. The device provided improves the work reliability and efficiency of a SiC MOSFET bridge converter and reduces the cost and complexity of drive control.

The invention discloses a one-way isolated type metal-oxide-semiconductor filed-effect transistor (MOSFET) drive circuit. The one-way isolated type MOSFET drive circuit comprises a level transformation and pulse drive circuit, a pulse transformer, a magnetic reset circuit and an acceleration turn-off circuit. The level transformation and pulse drive circuit is used for level transformation and power amplification on input pulse signals so as to drive the pulse transformer to work. The magnetic reset circuit is used for enabling the pulse transformer to carry out reliable magnetic reset. The acceleration turn-off circuit is used for accelerating turn-on and turn-off of a MOSFET tube, and comprises a capacitor, a second resistor, a third resistor and a PNP type triode. One end of the capacitor is connected with an auxiliary edge synonym end of the pulse transformer, the other end of the capacitor is connected with the second resistor, and the other end of the second resistor is connected with a grid electrode of the MOSFET tube. The third resistor is connected with the capacitor in parallel, a collector electrode of the PNP type triode is connected with an auxiliary edge non-synonym end of the pulse transformer, a base electrode of the PNP type triode and the capacitor are connected with one end of the second resistor, and an emitting electrode of the PNP type triode is connected with the grid electrode of the MOSFET tube.

The invention provides an LED drive control circuit, which is applicable to the field of lighting circuits. The LED drive control circuit comprises a singlechip, a triode, a metal oxide semiconductor (MOS) transistor, a constant current integrated chip and an energy storage inductor, wherein the singlechip is connected with the two ends of a power supply; a base electrode of the triode is connected with the singlechip, while an emitting electrode is connected with the negative electrode of the power supply; the triode is turned on or off under the control of the singlechip; the gate of the MOS transistor is connected with the collector of the triode through a voltage division resistor R1, while the source is connected with the positive electrode of the power supply; the power end of the constant current integrated chip is connected with the drain of the MOS transistor, while the feedback end is connected with the LED for sampling the current; and the energy storage inductor is connected between the output end of the constant current integrated chip and the LED. The LED drive control circuit provided by the invention is realized by using the constant current integrated chip of low cost and high efficiency so as to ensure stable and reliable work of the LED; and the entire circuit has a very simple structure.