8 results about "Current conveyor" patented technology

A display pixel compensation circuit device using a dual-slope includes N channel multiplexers respectively coupled to sensing lines of corresponding channels; a sensing current conveyor configured to sense, on a target sensing line selected by control signals, a drain current of a target pixel's driving thin-film transistor; a noise current conveyor configured to sense, on an adjacent sensing line, panel noise, the adjacent sensing line being next to the target sensing line; and dual-slope error-detection circuitry configured to derive a pixel error from outputs of the two conveyors, convert the error into a sign value and an error value, and store these in a memory. In subsequent frames, the error value is arithmetically added to or subtracted from the digital pixel signal according to the sign value and supplied to respective channels, enabling real-time multi-bit correction with reduced silicon area and improved power efficiency.

A low-power programmable gain amplifier (PGA) with 3dB out-of-band amplification is based on a second-generation current conveyor structure of foldable source follower, which comprises a common-mode feedback loop, a DC offset self-calibration loop, a fast start circuit and a dynamic bias circuit. The programmable gain amplifier amplifies narrow-band signals with 3dB out-of-band, changes the bandwidth by adjusting the tail current with digital signals, and then changes the gain size, thereby building a bridge between power consumption and gain. The gain and power consumption are positively correlated, and the effect of dynamic low power consumption is achieved. The common-mode feedback loop controls the PGA output DC point at V DD / 2, so that the PGA output has the maximum swing. The DC offset self-calibration loop suppresses the output DC offset of the PGA through voltage-current negative feedback. The fast start circuit is used to ensure smooth and fast start of the PGA. The dynamic bias circuit is used to provide current bias to control the gain of the PGA.

A touch driver includes: a plurality of current conveyors connected to a plurality of touch electrodes, the plurality of current conveyor circuits configured to (i) receive a plurality of first currents from the plurality of touch electrodes, and (ii) generate a plurality of second currents having opposite directions to the plurality of first currents; a common current subtractor circuit configured to (i) receive the plurality of first currents and the plurality of second currents from the plurality of current conveyor circuits, and (ii) generate a plurality of output currents that are a sum of (a) a mean current of the plurality of second currents and (b) the plurality of first currents; a plurality of integrator circuits configured to generate a plurality of output voltages by integrating the plurality of output currents; and an analog-to-digital converter configured to convert the plurality of output voltages into digital signals corresponding to touch data.

A grounded positive and negative capacitance multiplier including a first number (i) of current conveyors connected in a cascaded manner. Each current conveyor includes a transconductance amplifier (OTA), a feedback network (FBN) including a second number (N) of CMOS inverters, and a feedforward network (FFN) including a third number (M) of CMOS inverters. A base capacitor is connected between a first input terminal of a first current conveyor of the cascaded current conveyors and a ground node. A multiplied capacitance is obtained between a second input terminal of the first current conveyor and the ground node, with a capacitance value given by(-MN)i*CB.CB represents a capacitance of the base capacitor. When i is an odd number, the multiplied capacitance has a negative value, and when i is an even number, the multiplied capacitance has a positive value.

The embodiment of the invention discloses a state detection method, device and equipment for a conveying belt and a medium, and the method comprises the steps: continuously obtaining a plurality of roll line video frames of a current conveying belt through target collection equipment, and obtaining a video frame rate used for collecting the plurality of roll line video frames; performing roll line identification on each roll line video frame based on a target roll line identification model to obtain roll line position information in each roll line video frame; based on the roll line position information corresponding to the plurality of roll line video frames, determining position change information of roll lines in adjacent roll line video frames; determining moving speed information of a roll line in the current conveying belt based on the video frame rate and the position change information; and comparing the roll line standard state information with the position change information and / or the moving speed information, and determining a current state detection result corresponding to the current conveying belt. Through the technical scheme of the embodiment of the invention, contact type state detection is avoided, the equipment operation and maintenance cost is reduced, and the accuracy and efficiency of conveyor belt state detection are improved.

The utility model discloses a powder coating production is with tablet press cooling conveyor belt relates to powder coating production equipment technical field, aims at solving the current conveyor belt when conveying molten material flake for a long time and will appear temperature rise, cause flake upper and lower face temperature uneven, appear the technical problem of thickness inconsistency, surface uneven etc. defect, including conveyer main part, the frame both sides of conveyer main part all are fixed with baffle, all intercommunication installation of baffle board wall on both sides has the fan of opposite air outlet, the utility model discloses the design can reduce the blowing range of baffle, installs the fan of opposite air outlet on the both sides of conveyer main part frame, sets up the cooling piece of contact with conveyor belt bottom surface simultaneously, has realized the double cooling mode of air cooling and water cooling. The air outlet of opposite two sides fan can change the air direction and blow the cooling of both sides conveyor belt, has the advantage that the cooling effect is stable, keeps the surface temperature balance of conveyor belt, improves the quality of flake.

The invention provides an analog front-end receiving circuit for an active pen, a noise cancellation unit and a noise cancellation method. The circuit comprises a current transmitter, a band-pass filter and a comparator which are connected in sequence, the current transmitter receives an input signal and outputs a current signal; the band-pass filter receives the current signal, filters a noise signal and then outputs a first voltage signal; the comparator receives the first voltage signal and outputs a digital square wave signal. In a multi-channel parallel working mode, in-band common-mode interference with overlapped frequency and active pen signals is actively counteracted through current averaging and subtraction operation by utilizing spatial correlation of common-mode noise on each induction channel, and the signal-to-noise ratio and the anti-interference capability of the system are improved.

A display device includes a display panel and a readout circuit. The display panel includes a pixel including a light emitting element, a sensor including a light sensing element, and a dummy sensor. The readout circuit outputs a readout signal based on a sensing signal received from the sensor and a dummy sensing signal received from the dummy sensor. The readout circuit includes a reference current conveyor that outputs a reference signal corresponding to the dummy sensing signal, and a sensing circuit that outputs the readout signal corresponding to a difference between the sensing signal and the reference signal.