32results about How to "Low current consumption" patented technology

A drive circuit includes a first level shift circuit outputting a potential higher than an input potential by a prescribed voltage; a pull-up circuit outputting to an output node a potential lower than an output potential of the first level shift circuit by the prescribed voltage; a second level shift circuit outputting a potential lower than the input potential by the prescribed voltage; a pull-down circuit outputting to the output node a potential higher than an output potential of the second level shift circuit by the prescribed voltage; and a capacitor connected between output nodes of the first and second level shift circuits. Accordingly, through-current is reduced.

The invention discloses an on-chip clock generating circuit with lower power consumption. The on-chip clock generating circuit with the lower power consumption comprises a reference current source circuit, a frequency selection circuit, a controlled oscillating circuit and a wave-shaping circuit. The wave-shaping circuit is composed of a comparator, two cascade amplitude limiting circuits and an inverter chain and is used for carrying out amplitude limitation and shaping on the wave shape of output oscillating signals, lowers power consumption and outputs clock signals. The reference current source circuit generates reference current not varying along with the voltage of a power source and temperature, supplies multiple ways of image current sources to the frequency selection circuit, supplies controlled summarize current to a numerical control circuit, inputs the current to the controlled oscillating circuit, changes the frequency of a relaxation oscillator controlled by input current and realizes the functions configurable to the output clock signal frequency. The on-chip clock generating circuit with lower power consumption can be applied to a wake-up circuit and a sensor interface circuit in a wireless transmission radio frequency chip and an on-chip clock generating circuit in a data conversion circuit, and is particularly suitable for the occasions with wide variation range of temperature and voltage of the power source and with high low-power-consumption requirement.

The invention relates to a moment-assistant sensor for a single magnetic pole electric bicycle, which comprises a fixed disk fixed nearby a middle shaft of the electric bicycle and is characterized in that the fixed disk is provided with a passage, two sides of the passage are provided with a magnet and a Hall element capable of sensing magnetic field changes respectively, the Hall element is connected with a Hall circuit, the tooth ends of an internal tooth and an external tooth are inserted into the passage, a gap between the internal tooth and the external tooth is changeable, the depths inserted into the passage of the tooth ends exceed the position of a magnetic field, the internal tooth is fixedly connected with an inner disk of a faceplate, the external tooth is fixedly connected with an outer disk of the faceplate, the inner disk is positioned in the outer disk, the inner disk is connected with the outer disk through a driving spring, the outer disk is connected with a real wheel driving chain, and the inner disk is connected with a pedal crank for driving the inner disk to rotate. The moment-assistant sensor has small quantity of components and parts and a simple structure, and can greatly reduce the product cost; besides, a single Hall circuit has small power consumption current and can be connected with a controller of the electric bicycle directly.

The invention discloses a linear programmable switched capacitor gain amplifier. With the piecewise-linear concept, firstly, the whole gain curve is cut into a plurality of sections linearly; and then the linear gain adjustment of MSB and LSB is realized in the same gain stage. The linear programmable switched capacitor gain amplifier realizes the linearization by setting the sampling capacitor array, keeping each capacitor value in the capacitor array, matching the switch of the capacitor switch, sampling the capacitor array, and keeping the arrangement of the capacitor array; moreover, the function of the whole programmable gain amplification can be realized in the same stage, thereby not only simplifying the design, saving the cost, reducing the consumption of current, and being suitable for the expendability and carrying device.

A connecting device is provided, including a control apparatus, an energy storage apparatus, an input connection, and an output connection, the input connection being connected to the energy storage apparatus by means of a charging apparatus, the charging apparatus being configured for controlled charging of the energy storage apparatus, the control apparatus being configured, after reaching a preset charge state of the energy storage apparatus, to connect the energy storage apparatus to the input connection; and the control apparatus also being configured, during and/or following connection of the energy storage apparatus to the input connection, to connect the input connection to the output connection.

The invention discloses a Hall encoder-based travel sensor. The travel sensor comprises a metal tube made of nonmagnetic metal materials. A magnet ring that matches with the outer diameter of the metal tube is arranged on the metal tube in a sleeved mode. Multiple Hall circuit arrays are arranged inside the metal tube and connected with the main SCM (single-chip microcomputer) by means of each sub-SCM. The output terminal of the main SCM is connected with an operational magnification circuit which is connected with an outer lead wire. In addition, the invention also discloses a method which utilizes the Hall encoder-based travel sensor to measure the travel distance. The invention has the advantages of good security, high reliability and high resolution ratio, and low power consumption., the resolution ratio achieved by the invention is as high as 3 mm, much better than the prior reed switch, thereby largely improving the position resolution ratio. Taking the travel of 192 mm as an example, the overall consumption is less than or equal to 7mA. Moreover, the invention is intelligent so as to be capable of automatic correcting and dual-directional transmission of signals, which facilitates the intelligent management in the detection field.

The invention discloses a portable electronic device and a method thereof for acquiring a chip pin state. The method for acquiring the chip pin state comprises the following steps of: firstly, if a dormant event is received, storing the chip pin state of the portable electronic device to make the portable electronic device enter a dormant mode; secondly, responding to an arousal event to make the portable electronic device return to a normal operation mode, and outputting the chip pin state; thirdly, displaying the chip pin state; fourthly, receiving the preset chip pin state; and finally, if the dormant event is received, substituting the chip pin state with the preset chip pin state.

The invention provides a vibrating film piezoelectric loudspeaker, which is characterized in that: it has a shell, the shell has an opening, and the edge of the sound film is bonded to the opening of the shell; The sheets are respectively fixed on the upper surface and the lower surface of the metal substrate, and there are wires connecting the two piezoelectric ceramic sheets; there is a connecting body connecting the middle part of the piezoelectric ceramic sheet located on the upper surface of the metal substrate and the sound membrane. Middle part; one audio feeder is connected to the metal substrate, and the other audio feeder is connected to any one of the above-mentioned piezoelectric ceramic sheets. The shape of the metal substrate is circular arc or irregular arc. The invention is a diaphragm type piezoelectric speaker with low minimum resonance frequency, flat frequency response, soft and pleasing sound.

The invention relates to a non-contact typed actuator which is arranged on a substrate, comprising a slab and a bushing; the non-contact typed actuator is characterized in that the ratio of the length and the width of the slab is from 0.55 to 0.59. When an external voltage is added, although the slab is bent for being attracted by the substrate, the slab is not contacted with the substrate. As no friction force between the slab and the substrate exists, the non-contact typed actuator only needs to apply extremely small voltage and consume minimum current to resist the reaction force generated by the attraction of static force of the slab and to carry out the bouncing action by an elastic tensile force generated when the slab recovers from a bent state; therefore, the non-contact typed actuator can reduce the driving voltage, reduce the electricity consumption and the abrasion of the component so as to prolong the service life.

The invention provides a battery charging control system, which comprises a battery and a charging control circuit, wherein the charging control circuit comprises an operational amplifier, a first divider resistor, a second divider resistor and a controller; the operational amplifier is supplied with power by a charging power supply; a first input end of the operational amplifier is connected with one end of the battery, and a second input end of the operational amplifier is connected with an output end of the operational amplifier; the first divider resistor and the second divider resistor are connected in series between the output end of the operational amplifier and the other end of the battery; and the intermediate node of the first divider resistor and the second divider resistor provides a feedback voltage for the controller. By the battery charging control system, quiescent currents consumed by the battery can be as small as possible in a standby state.

The invention discloses an energy-saving method and energy-saving device for an electronic product. A switching module is disposed between a power supply and a power utilization circuit. A time delay switching-off module is disposed at a bypass of the switching module, and the output end of the time delay switching-off module is connected to the control end of the switching module. The control end of the switching module receives a control signal or a working state signal of the power utilization circuit, wherein the control signal or the working state signal of the power utilization circuit is coupled to the control end of the switching module. When there is no control signal or the working state signal is 'not working', there is no signal transmitted to the control end of the switching module, and the control end of the switching module is controlled by the time delay switching-off module, and the switching-off operation is delayed. When there is the control signal or the working state signal is 'working', there is a signal transmitted to the control end of the switching module, the switching module is controlled by the signal, the time delay switching-off module does not plays a role and the power utilization circuit works normally. The device can effectively reduce the static energy consumption current of the electronic product, and prolongs the service time of a battery.

The present invention provides a suspension control input apparatus, so as to solve the problems that an existing suspension control input apparatus is large in volume and detection signals are not continuous. The suspension control input apparatus comprises an infrared light emitting diode, a position sensor, and a signal control and processing circuit. The signal control and processing circuit is electrically connected to the infrared light emitting diode, and the signal control and processing circuit drives the infrared light emitting diode and controls timing of infrared light pulses of the infrared light emitting diode. The infrared light pulses are used to illuminate an object; reflected infrared light of the object is projected on the position sensor; and the position sensor converts the received reflected infrared light and ambient background light into a corresponding electrical signal. The signal control and processing circuit synchronously receives and processes the electrical signal according to the timing of the infrared light pulses. The signal control and processing circuit converts a light pulse signal of infrared reflection into a digital signal, and transmits the digital signal to a microprocessor to calculate a distance, a position, a movement direction and a movement speed of the object. The apparatus can be applied to suspension control of a portable electronic product.

The invention discloses a low-cost and low-power-consumption feedback-type detection brushless motor boost circuit. The circuit comprises a power supply battery and a brushless motor connected with the power supply battery, and is also provided with a boosted circuit connected with the power supply battery, a control circuit connected with the boosted circuit, a brushless motor adjusting circuit connected with the control circuit, a voltage division feedback circuit connected with the control circuit, and a touch switch circuit connected with the control circuit. The boost circuit comprises afirst inductor, a second unidirectional diode, a first MOS tube, a first capacitor, a fourth resistor and an eighth resistor. The control circuit comprises a control chip, a twelfth resistor and a fourth capacitor. The circuit is reasonable in structural arrangement, the working time of a product can be greatly prolonged by fixing the boosting duty ratio frequency, the service life of a battery can be protected, the use stability is good, and the practicability is high.

The invention relates to a method for detecting emergency unlocking of a park lock, in which the park lock (1) is activated and deactivated by a hydraulic park lock operating means (16) in that a retaining magnet (21) immobilises or releases a piston (22) of a hydraulic cylinder (23) of the park lock operating means (16), a park lock pawl (2) engaging in or disengaging from a park lock wheel (3) as a result of a movement of a hydraulic fluid (11) triggered by a park lock actuator (9). In a method in which an activated or deactivated emergency unlocking of the park lock can be detected reliably, a current (I) of the electrical park lock actuator (9) is evaluated when the park lock actuator (9) attempts to open the park lock (1).

A method of storing signals having a course over time in an implantable medical device, and/or transmitting the signals out of the device and out of the patient's body, with the course over time being detected in the device, particularly at predetermined time intervals with a constant sampling interval, and a sequence of signal samples being obtained therefrom, of which a partial quantity is stored and/or transmitted as the result of a selection made with a predetermined selection criterion, with the selection criterion being the first derivation of the course over time of the signals according to time, and with the selection being made such that the first derivation of the straight-line connection between an nth and the (n−1)th signal sample is determined and compared to the first derivation of the straight-line connection between the (n−1)thnth signal sample and the last-stored and/or last-transmitted signal sample, and the nth(n−1)th signal sample is then stored and/or transmitted as the new last signal sample exactly when these first derivations differ by more than a predetermined value.

The invention relates to a voltage detection circuit for multiple lithium batteries. The voltage detection circuit comprises a high-precision comparator, two groups of voltage-dividing capacitors, a control switch and a lithium battery pack, and is characterized in that the lithium battery pack is formed by connecting m (m is greater than or equal to 2) lithium batteries in series, and the lithiumbattery pack is connected with the positive input end of the high-precision comparator through one group of voltage-dividing capacitors; and the high-precision basic voltage of the circuit is connected with the inverting input end of the high-precision comparator through the other group of voltage-dividing capacitors.

A semiconductor memory device having a memory array is provided. A read unit reads information stored in a memory cell. A step-up unit steps up an externally supplied voltage, and supplies the stepped-up voltage to the memory cell. A start control unit has the step-up unit start the stepping up after a read cycle begins. A detection unit detects that the stepped-up voltage has reached a predetermined level, and has the read unit start the reading upon the detection. A stop control unit has the step-up unit stop the stepping up when a time period required for the reading has elapsed since the detection. With this construction, the time taken for stepping up the voltage supplied to the memory cell is minimized in accordance with the time taken for the reading. Hence the current consumption is reduced when compared with the case where the step-up time is set unnecessarily long.