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a differential amplifier

A differential amplifier and differential input technology, applied in the direction of differential amplifiers, amplifiers, radio frequency amplifiers, etc., can solve the problems of large space occupation, low power amplifier efficiency, and low operating frequency, so as to reduce the occupied area, area, and operating frequency. Enhanced effect

Inactive Publication Date: 2020-11-03
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] However, the existing differential amplifiers based on GaN devices still have shortcomings such as large space occupation, high loss, low operating frequency, and low power amplifier efficiency.

Method used

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Embodiment Construction

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0033] The object of the present invention is to provide a differential amplifier.

[0034] In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0035] figure 1 It is a differential amplifier layout of an embodiment of a differential amplifier in this application.

[00...

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Abstract

A differential amplifier, comprising a pre-stage driver stage (106), an input balun (101), a matching network (102), a differential tube pair (103), a bias network (104) and an output balun (105); the pre-stage The output terminal of the driver stage (106) is connected to the input terminal (203) of the input balun (101); the output terminal (205) of the input balun (101) is connected to the input terminal of the matching network (102), and the output terminal of the matching network (102) is connected to the input terminal of the matching network (102). The input end of the differential tube pair (103) is connected to the bias network (104), and the output end of the differential tube pair (103) is connected to the output balun (105); the input balun (101) is a single-turn laminated transformer; the output balun (105) is the full-frame outer half-frame transformer in the plane. The input balun of the differential amplifier adopts a single-turn laminated transformer, and the output balun adopts an inner full-frame outer half-frame structure, so that the differential amplifier occupies a small space, has low loss, high operating frequency, and high power amplifier efficiency.

Description

technical field [0001] The invention relates to the technical field of amplifiers, in particular to a differential amplifier. Background technique [0002] Differential amplifiers are used in silicon (Si)-based circuits, such as complementary metal oxide semiconductor field effect transistors (Complementary MetalOxide Semiconductor, CMOS), because of their many advantages such as suppressing common-mode signals, reducing even-order harmonic components, and suppressing odd-mode oscillations. a wide range of applications. As a representative of the third-generation semiconductor, gallium nitride (GaN) devices have the advantages of high voltage, high frequency, and high power density. Therefore, differential amplifiers based on GaN devices can break through the limitations of power output in silicon-based circuits. [0003] However, the existing differential amplifiers based on GaN devices still have disadvantages such as large space occupation, high loss, low operating frequ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F1/56H03F3/45
CPCH03F1/565H03F3/45179H03F2203/45624H03F2203/45031H03F2203/45148H03F3/195H03F3/45381H03F2200/451H03F2200/06H03F2200/09H01L23/00H03F3/45076
Inventor 徐跃杭肖玮刘宪锁孙博文
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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