Integrated laminated transformer based on two layers of metal

Abstract

The invention discloses an integrated laminated transformer based on two layers of metal, consisting of a substrate, a plurality of layers of mediums, a secondary coil and a primary coil, wherein the mediums are arranged on the substrate, and the secondary coil and the primary coil are arranged in the mediums; an upper plane of the first layer of medium, sequentially in the plurality of layers of mediums from the bottom up, is provided with two mutually isolated turns of secondary coil connected in parallel around the axial center, and one sides of parallel connection parts of the two turns of secondary coil are provided with opening grooves; an upper plane of the second layer of medium is provided with six mutually isolated turns of primary coil connected in series around the axial center; each two joint leading-out lines of the secondary coil and the primary coil are arranged side by side to separate off and lead out the opening grooves on one side of the secondary coil, wherein the each two joint leading-out lines are arranged in the same layer with the secondary coil, and the two joint leading-out lines of the primary coil are arranged between the two joint leading-out lines of the secondary coil. The integrated laminated transformer based on two layers of metal, disclosed by the invention, has the advantages of few occupied layers of metal, saved cost, high magnetic induction coefficient, strong coupling degree of signals, large bandwidth and wide application.

Description

technical field [0001] The invention belongs to the technical field of radio frequency analog integrated circuits. It relates to a transformer, more specifically, an integrated laminated transformer based on two layers of metal, which is mainly used in a wideband low-noise amplifier or mixer at the front end of a radio frequency receiver to convert or transform radio frequency signals . Background technique [0002] Integrated laminated transformers are characterized by high magnetic inductance and are therefore commonly used as single-ended-to-differential signal converters (Balun) in wideband low-noise amplifiers or mixers at the front end of RF receivers. However, due to technical defects and deficiencies in the existing traditional integrated laminated transformers, the scope of application is limited to a certain extent. First of all, the design and manufacture of traditional integrated laminated transformers need to be realized with three layers of metal, in which th...

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Problems solved by technology

Secondly, the relatively low turn ratio limits its use as a Balun in RF analog integrated circuits, and cannot be used as an impedance matching device or a signal feedback device for current or voltage conversion (otherwise it will reduce the gain and worsen the noise)

If you increase the turns ratio by increasing the number of turns in either coil or decreasing the number of turns in the other coil, the magnetic inductance decreases accordingly

Third, integrated stacked transformers are mostly used for voltage feedback in negative feedback amplifiers, and are not suitable for current feedback, because many irrational characteristics of integrated stacked transformers will reduce the noise performance of the amplifier

Therefore, the application range of integrated laminated transformers based on three-layer metal is limited

[0003] An integrated laminated transformer based on a two-layer metal of the present invention has no relevant literature introductions, and no relevant patent documents have been searched.

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