Fully differential power current amplifier

Abstract

The invention discloses a fully differential power current amplifier, which consists of an active amplification network and a feedback network, wherein the active amplification network consists of two identical standard active two-port amplification networks, and the feedback network consists of a current parallel negative feedback network realized by two respective free transformers and a current series negative feedback network realized by two single passive devices. The standard active two-port amplification networks and the transformers form one group in a pairwise way, the dotted end of a primary coil of each transformer is connected with the reverse-phase output end of the standard active two-port amplification networks, the unlike end of the primary coil is connected with a load, the dotted end of a secondary coil of each transformer is connected with the same-phase input end of the standard active two-port amplification networks, and the unlike end of the secondary coil is grounded. Two ends of the passive devices are respectively and simultaneously connected with the same-phase output end and the reverse-phase input end of one standard active two-port amplification network in the two standard active two-port amplification networks. The fully differential power current amplifier has the advantages that the integration degree is high, the cost is low, and the performance is good.

Description

technical field [0001] The invention belongs to the technical field of analog integrated circuits, and in particular relates to a fully differential power current amplifier. Background technique [0002] Impedance matching is a difficult point in the design of broadband amplifiers. Common broadband (or ultra-wideband) amplifier circuit structures, such as common gate (or common base) amplifiers, distributed amplifiers, and resistive voltage parallel negative feedback amplifiers, etc., the impedance matching is related to noise, linearity and power There is a correlation between important parameters such as power consumption or chip area, that is, the realization of its impedance matching is at the expense of deteriorating noise, or reducing linearity, or increasing power consumption or chip area. Second, these amplifiers do not have well-defined input impedances and transfer functions over a wide bandwidth, so their in-band gain is not flat. Third, the output signal of the...

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Problems solved by technology

Fourth, the input and output signals of these amplifiers are single-ended signals, so their ability to resist interference signals is poor, and they are not suitable for long-distance signal transmission

[0003] A kind of fully differential power current amplifier of the present invention, there is no relevant literature introduction at present, and no relevant patent documents have been searched yet

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