10 results about "Multistage amplifier" patented technology

Power amplifier assemblies and multiple-stage amplifier systems include first and second semiconductor dies, each of which includes an integrated transistor. The second semiconductor die is physically and electrically coupled to a die-mounting interface at a mounting surface of the first semiconductor die in a "flip-chip" orientation. This arrangement provides a multiple-stage amplifier that includes the integrated transistor of the first semiconductor die coupled in a cascade arrangement with the integrated transistor of the second semiconductor die. The first and second semiconductor dies may be formed from different semiconductor materials.

Power amplifier assemblies and multiple-stage amplifier systems include first and second semiconductor dies, each of which includes an integrated transistor. The second semiconductor die is physically and electrically coupled to a die-mounting interface at a mounting surface of the first semiconductor die in a “flip-chip” orientation. This arrangement provides a multiple-stage amplifier that includes the integrated transistor of the first semiconductor die coupled in a cascade arrangement with the integrated transistor of the second semiconductor die. The first and second semiconductor dies may be formed from different semiconductor materials.

The application discloses a light source device, a system and a water window band full-coherent free electron laser generating method. The device comprises: a harmonic generation unit for connecting an electron beam and a seed laser and generating low-order harmonics; at least two cascaded amplifier units connected with the harmonic generation unit, for connecting the low-order harmonic radiation and generating coherent harmonic radiation, and for tuning the coherent harmonic laser to high-order harmonic radiation to obtain water window band full-coherent free electron laser pulses. The application constructs a multi-stage amplifier unit in the rear stage of the harmonic generation unit, and each subsequent amplifier unit is configured to resonate on a high-order harmonic of the radiation output by the previous amplifier unit, so that the harmonic radiation of the previous stage is used as the effective seed of the subsequent stage, the frequency is up-converted stage by stage, the frequency of the coherent radiation is converted to the target high-order harmonic stage by stage, and the water window band full-coherent free electron laser is obtained.

Power amplifier assemblies and multi-stage amplifier systems include a first semiconductor die and a second semiconductor die, each semiconductor die including an integrated transistor. The second semiconductor die is physically and electrically coupled to a die mount interface at a mounting surface of the first semiconductor die in a "flip-chip" orientation. This arrangement provides a multi-stage amplifier including the integrated transistor of the first semiconductor die coupled in a cascaded arrangement with the integrated transistor of the second semiconductor die. The first semiconductor die and the second semiconductor die can be formed of different semiconductor materials.

An electroencephalogram signal acquisition circuit, a chip, and an electroencephalogram system, capable of realizing decoupling between a low-pass cut-off frequency and a gain of an acquisition circuit, and reducing the impact of a gain change on a working current, thereby improving the sampling accuracy of the acquisition circuit. The circuit comprises: a plurality of amplifying circuits, used for respectively filtering and amplifying a plurality of electroencephalogram signals to obtain a plurality of filtered and amplified signals, wherein each amplifying circuit comprises a multi-stage amplifier, the multi-stage amplifier includes a first amplifier and a second amplifier, the first amplifier is a programmable-gain amplifier, and the lower limit of the change range of a low-pass cut-off frequency is greater than a low-pass cut-off frequency of the second amplifier; a multiplexer, used for combining the plurality of filtered and amplified signals to obtain a combined signal; and an analog-to-digital converter, used for converting the combined signal into a digital signal.

Amplifiers with bias control for DC coupled single-ended distributed amplifiers of multi-stage amplifiers are described herein. An example amplifier with input bias control includes a distributed amplifier cell having an input coupled to a first distributed transmission line and an output coupled to a second distributed transmission line, an input coupling network coupled between the first distributed transmission line and the input of the distributed amplifier cell, and a bias interface circuit coupled between the input coupling network and the input of the distributed amplifier cell. The amplifier can also include a bias control circuit configured to control an amplifier input bias generated by the bias interface circuit at the input of the distributed amplifier cell.

A sub-nanosecond laser system is disclosed. The sub-nanosecond laser system may include: a pump laser source operable to generate a pump laser beam having a pump wavelength; a first pump beam splitter operable to receive the pump laser beam and split the pump laser beam into at least a first split pump laser beam and a second split pump laser beam; a passively Q-switched seed laser operable to receive the first split pump laser beam and generate a seed laser beam; and an amplifier assembly operable to receive the second split pump laser beam and the seed laser beam. The amplifier assembly may include one or more amplifiers arranged in series in a multi-stage configuration, arranged in a multi-pass configuration, or a combination thereof.

This invention relates to an ultra-precise solar tracking sensor, belonging to the fields of medium- and high-temperature solar thermal utilization, tracking photovoltaic power generation, or solar thermal power generation. It consists of a slit slot, a sunshade, solar cells, various concentrators, dustproof plates, and a frame. A sunshade is connected to the upper edge of the U-shaped plate in the slit slot. Solar cells are installed under the sunshade or on the bottom plate of the frame. Corresponding concentrators focus extremely weak, obliquely incident light onto the solar cells. This sensor transforms extremely weak deviation signals into strong signals through optical or electrical multi-stage amplifiers, transmitting them to the control system of a dual-axis automatic solar tracking machine. This timely correction of minute tracking errors maximizes solar energy utilization. It boasts advantages such as high sensitivity, high reliability, and ultra-precise solar tracking exceeding general accuracy.

The application provides an electroencephalogram signal acquisition circuit, a chip and an electroencephalogram system, which can realize decoupling between a low-pass cutoff frequency and a gain of the acquisition circuit, reduce the influence of gain variation on working current and improve the sampling precision of the acquisition circuit. The method comprises the following steps: a plurality of amplification circuits are used for filtering and amplifying a plurality of electroencephalogram signals respectively to obtain a plurality of filtered and amplified signals; wherein each amplification circuit comprises a multi-stage amplifier, the multi-stage amplifier comprises a first amplifier and a second amplifier, the first amplifier is a gain programmable amplifier, and the lower limit of the variation range of the low-pass cutoff frequency is greater than the low-pass cutoff frequency of the second amplifier; a multiplexer is used for merging the plurality of filtered and amplified signals to obtain a merged signal; and an analog-to-digital converter is used for converting the merged signal into a digital signal.