5 results about "Intermediate stage" patented technology

The invention discloses a low-power consumption bandwidth multiplication chopping stabilized operational amplifier based on an MOS (metal oxide semiconductor) device, which belongs to the field of design of analog integrated circuits. The low-power consumption bandwidth multiplication chopping stabilized operational amplifier comprises two frequency mixers, a shunt input stage, an intermediate stage for amplifying recovered current and a rail-to-rail output stage, wherein one frequency mixer is placed in front of an amplifier input stage, and the other frequency mixer is placed behind an amplifier output stage, thereby realizing the functions of raising frequency and reducing frequency of input signals; the shunt input stage is used for converting input voltage signals to current signals and forming small signal current in forward and backward directions; the intermediate stage for amplifying the recovered current comprises four low-voltage current mirrors and can realize the amplification of the recovered current; and the rail-to-rail output stage is used for realizing the rail-to-rail output of the signals. The low-power consumption bandwidth multiplication chopping stabilized operational amplifier has the capacity of improving bandwidth by nearly three times under the situation of not obviously increasing power consumption, and can reduce low-frequency 1/f noise, increase low-frequency gain, and reduce power consumption above one half while keeping the same bandwidth, the noise and other performances, thereby further improving the performances of the circuit.

In a power conversion device, a power conversion unit includes a single-phase inverter on a secondary side of a resonant type converter that has an input of a direct current. A power conversion unit group is configured by connecting outputs of the single-phase inverters of a plurality of power conversion units in series. Respective phases of three phase alternate current are formed with the three power conversion unit groups housed in a power conversion device housing. The plurality of power conversion units constituting the power conversion unit group are disposed along a longitudinal direction of the power conversion device housing. The respective three power conversion unit groups are disposed at an upper stage, a middle stage, and a lower stage in a height direction of the power conversion device housing. The power conversion device housing has one end side in the longitudinal direction as output terminals of the three power conversion unit groups. The power conversion device housing has the other end side in the longitudinal direction where terminals of the three power conversion unit groups are connected in common.