6 results about "Buffer amplifier" patented technology

A kind of two-port driven isolation coupling device, including first buffer amplifier, isolation coupler and second buffer amplifier, the isolation coupler includes isolation coupling transmitting unit and isolation coupling receiving unit, the isolation coupling transmitting unit is electrically connected to the first buffer amplifier and the second buffer amplifier.The first buffer amplifier is configured to be controlled by first control signal to output first voltage to one end of the isolation coupling transmitting unit;The second buffer amplifier is configured to be controlled by second control signal to output second voltage to the other end of the isolation coupling transmitting unit;The isolation coupling transmitting unit is configured to be driven by the first voltage and the second voltage to be isolated to the isolation coupling receiving unit.

A display device and a driving method thereof are disclosed. A display device according to an embodiment of the present application for solving the technical problem includes a display portion including a plurality of pixels connected with a data line and a sensing line, a data driving portion including a plurality of buffer amplifiers supplying a first sensing voltage to the data line during a first sensing period and a sensing portion receiving a first sensing signal from the pixels through the sensing line during the first sensing period, and a GIA amplifier providing a second sensing voltage to the data line during a second sensing period different from the first sensing period. The sensing portion receives a second sensing signal corresponding to the second sensing voltage from the pixels through the sensing line during the second sensing period and generates compensation data based on a difference between the first sensing signal and the second sensing signal.

A radio frequency (RF) front-end module (FEM) includes an amplifier and an integrated circuit coupled to the amplifier. The integrated circuit includes a buffer amplifier coupled to the amplifier, a variable attenuator coupled to the buffer amplifier, a phase shifter or time delayer coupled to the buffer amplifier, and a memory configured to store a gain calibration value and a phase calibration value. The gain calibration value controls an attenuation of the variable attenuator and the phase calibration value controls a phase shift of the phase shifter or a time delay of the first time delayer. The RF FEM also includes an interface configured to store the gain calibration value and the phase calibration value in the memory, an RF connection to a transceiver, and an RF connection to an antenna.

The utility model provides a novel digital composite signal generator, specifically related to data composite signal technical field, including single-chip microcomputer and digital synthesis circuit, single-chip microcomputer inside integrated DAC, and DAC generates fundamental wave sinusoidal signal, and digital synthesis circuit includes operational amplifier module and low pass filter module, and the fundamental wave sinusoidal signal of DAC generation, through operational amplifier module promotes fundamental wave amplitude, and low pass filter restrains high -frequency noise, ensures the output smooth pure sinusoidal wave. Buffer amplifier enhances signal drive ability and adapts 100 omega load, and adjustable gain module realizes output amplitude accurate control. The on -chip VDD monitor real -time monitoring power supply anomaly, watchdog timer prevents program failure, and JTAG debugging circuit supports non -invasive full -speed in system debugging. The scheme fuses signal processing, voltage monitoring and fault protection function, realizes the novel digital composite signal generator of frequency and amplitude programmable control, guarantees output stable and reliable in industrial environment and long -term unattended operation.

This invention relates to a dual-reference synthesized voltage generation circuit, comprising: a first reference source circuit and a second reference source circuit; a PWM circuit, including an analog switch and an isolation chip, wherein the analog switch is connected to the output terminal of the second reference source circuit and the isolation chip respectively; a digital control circuit, connected to the isolation chip via the digital control chip; a filter circuit, connected to the analog switch; an integral feedback circuit, connected to the filter module; a buffer amplifier circuit, connected to the output terminals of the second reference source circuit and the integral feedback circuit; and a protection circuit, with its input terminal connected to the first reference source circuit and the buffer amplifier circuit, and its output terminal connected to the integral feedback circuit. This invention employs a dual-reference voltage synthesis approach, reducing dependence on precision resistors and temperature, minimizing changes in the reference chip output caused by temperature variations, and simultaneously reducing high-frequency noise introduced by PWM modulation.

A buffer amplifier device includes a first-side buffer amplifier and a first-side current mirror circuit; the first-side current mirror circuit is electrically connected to the first-side buffer amplifier. The first-side buffer amplifier is configured to output a first-side current; the first-side current mirror circuit is configured to output a first-side replicated current associated with the first-side current; the first-side buffer amplifier is configured to receive a first-side input voltage and output a first-side output voltage; the first-side output voltage is equal to the first-side input voltage, or the first-side output voltage is a fixed multiple of the first-side input voltage.