61 results about "Regulatory circuit" patented technology

The technical scheme of the invention provides a charging circuit, a terminal and a charging system. The charging circuit is connected with a charger, a terminal load and a battery and is characterized by comprising a first regulation circuit, a current detection circuit, a voltage detection circuit and a control circuit, wherein a first end of the first regulation circuit is connected with the charger, a second end of the first regulation circuit is also connected with the terminal load, a third end of the first regulation circuit is connected with the control circuit, a second of the current detection circuit is connected with a positive electrode of the battery, a negative electrode of the battery is connected with the charger, and the current detection circuit is connected in series between the negative electrode of the battery and the charger. In the charging circuit provided by the invention, a charging circuit can be adjusted when the charging current abruptly changes so as to prevent damage of an excessive large charging current to the charging circuit and the battery.

Provided herein are high-input detector modules and multi-input biological classifier circuits and systems that integrate sophisticated sensing, information processing, and actuation in living cells and permit new directions in basic biology, biotechnology and medicine. The multi-input biological classifier circuits described herein comprise synthetic, scaleable transcriptional/post-transcriptional regulatory circuits that are designed to interrogate the status of a cell by simultaneously sensing expression levels of multiple endogenous inputs, such as microRNAs. The classifier circuits then compute whether to trigger a desired output or response if the expression levels match a pre-determined profile of interest.

The invention discloses a power factor correction circuit, a control method and a controller. The conduction time of a main switch tube of a switch type regulation circuit is adjusted according to measured total harmonic distortion, and the total harmonic distortion is minimized while power factor correction is carried out, so that special compensation design does not need to be performed aiming at a certain type of factors influencing total harmonic distortion indexes independently, and the overall control method is simplified.

A voltage regulating circuit and a method thereof are provided. The voltage regulating circuit includes: a tank circuit, an error amplifier, an output circuit, and a feedback circuit. The tank circuit provides a fixed voltage. The error amplifier generates an amplified voltage according to a reference voltage and a feedback voltage. The output circuit converts a supply voltage into an output voltage in response to at least one of the amplified voltage and the fixed voltage. The feedback circuit generates a feedback voltage according to the output voltage.

A voltage regulation circuit includes: a first voltage divider that divides a regulation voltage with a predetermined division ratio to generate a division voltage; a first current driving force control unit configured to compare a reference voltage with the division voltage and generate a first control signal; a current driving unit configured to generate a driving current with a variable driving force based on the first control signal and a second control signal, and generate the regulation voltage; and a second current driving force control unit configured to generate the second control signal in accordance with a level variation of the regulation voltage.

The invention discloses a regulation circuit and a regulation method for a light-emitting diode. The regulation circuit is provided with a variable voltage unit for acquiring direct current power andproviding constant current to drive at least one light-emitting diode, and a pulse modulation unit for generating a driving signal to control the variable voltage unit. The driving signal of the pulsemodulation unit has an operation cycle, the driving signal under the operation cycle drives the variable voltage unit to output normal operation power, while the pulse modulation unit is connected with a time sequence regulation unit which generates a regulation signal to be sent to the pulse modulation unit to modulate a dormancy cycle added into the operation cycle of the driving signal, and the driving signal under the dormancy cycle reduces the power through which the variable voltage unit drives the light-emitting diode. Therefore, the variable voltage unit regulates the power output tothe light-emitting diode according to the alternate control of the operation cycle and the dormancy cycle of the driving signal to avoid the light-emitting diode emitting heat continuously so as to reduce the accumulation of heat energy.

The invention discloses an efficient and energy-saving electromagnetic control circuit, and belongs to the technical field of contactors. The electromagnetic control circuit comprises a full-bridge driving chip U1 used for controlling the function of a contactor, an energy storage circuit connected with a power supply, a voltage stabilizing circuit which is connected with the energy storage circuit and is used for stabilizing an input voltage and then sending the input voltage to the full-bridge driving chip U1, a voltage signal detecting and adjusting circuit which is connected with the power supply and is used for detecting and adjusting an input voltage signal and carrying out filtering overvoltage protection, a three-stage inverter connected with the voltage signal detection and regulation circuit, a pull-in delay regulation circuit used for controlling output of pull-in voltage to enable a coil of a contactor KM to be powered on in the forward direction and then to be turned off in a delayed mode, and a release delay regulation circuit used for controlling output of release voltage to enable the coil of the contactor KM to be powered on in the reverse direction and then to be turned off in a delayed mode. According to the efficient and energy-saving contactor control circuit, the energy-saving effect is obvious, and the energy-saving effect can reach 98% or above; and single-line inching control opening and closing is realized.

The invention discloses an inductive current AC component reconstruction circuit, a control circuit and a switch circuit. The inductive current AC component reconstruction circuit comprises an integral circuit and a biasing regulation circuit, wherein a first input end of the integral circuit is used for receiving a signal expressing a switch node voltage, the integral circuit is used for performing integration on difference between a voltage of the first input end and a biasing voltage, an output voltage of the integral circuit contains information expressing an inductive current AC component, and the biasing regulation circuit is used for adjusting DC biasing of the output voltage of the integral circuit to a first voltage. By reconstructing the inductive current AC component, the outputis controlled, the circuit is good in transient response, an inductive current is not needed to be sampled, the influence of the switch process on the control circuit is prevented, and the control circuit is simpler.

The exposure of cells, tissues and organs to “stress,” such as elevated temperature, stimulates production of active heat stress transcription factors (HSF), which in turn, induce expression of genes regulated by stress promoters. Normally, the activity of stress promoters declines after cells, tissues and organs are returned to a normal condition. Mutant forms of HSF, however, can constitutively transactivate stress genes, in the absence of stress. By taking advantage of such mutant HSF, molecular circuits can be devised to provide a sustained expression of a gene of interest using a single application of stress. One form of molecular circuit comprises (a) a first nucleic acid molecule that comprises a gene encoding a transcription factor and a promoter activatable by stress and by the transcription factor, wherein the stress-activatable promoter and the transcription factor gene are operably linked, and (b) a second nucleic acid molecule that comprises a gene of interest and a second promoter activatable by the transcription factor, wherein the second promoter and the gene of interest are operably linked.

The invention provides a temperature integrated regulation and control device and a temperature integrated regulation and control method. The temperature integrated regulation and control device comprises a temperature point regulation circuit module and a temperature point regulation gear module, the temperature point regulation circuit module comprises resistors corresponding to different temperature measuring points of different to-be-measured objects and peripheral circuits of the resistors; the temperature point regulation gear module comprises a plurality of different gears; for the temperature measurement points corresponding to different temperatures of different to-be-measured objects, when a corresponding gear in the temperature point regulation gear module is selected, the corresponding resistor and the peripheral circuit thereof in the temperature point regulation circuit module are used, so that the temperature integrated regulation and control device provides test circuits corresponding to different temperature measuring points of different to-be-measured objects through the same circuit. The problems that according to an existing mainboard testing method, time and labor are wasted in the debugging process, and errors are prone to occurring are solved, the testing temperature points can be fixed and adjusted according to preset requirements, debugging errors can be prevented, and the debugging testing effect can be conveniently and rapidly conducted.

This invention provides a current self-checking regulation circuit based on voltage calibration including a bandgap reference unit, a self-calibration unit, a detection and regulation unit, current mirror units, and a current mirror control unit. The bandgap reference unit is configured to generate a voltage signal, the self-calibration unit is configured to respond to a digital signal of the detection and regulation unit and calibrate the voltage signal of the bandgap reference unit. The detection and regulation unit samples the reference current signal and a mirror current signal of the regulation group current mirror unit and generate a digital control signal according to the reference current signal. and the reference group current mirror unit responds to the digital control signal and outputs a regulated bias current signal meeting needs of the laser driver.

A method of directed evolution screening includes selecting a protein expression platform for an evolution target, expressing a key rupture gene configured to trigger droplet rupture, developing gene regulatory circuits to control expression of the key rupture gene as a function of performance of the evolution target, encapsulating expression components in droplets, and triggering droplet rupture by expressing a rupture agent from the key rupture gene.