Composite amplifier

A technology of amplifier and amplifying unit, which is applied in the electronic field and can solve the problems of limited slew rate of broadband high-voltage amplifier, unsatisfactory ability to output high-frequency and large-amplitude signals of broadband high-voltage amplifier, and temperature rise inside the amplifier.

Active Publication Date: 2020-05-22
SHENZHEN CITY SIGLENT TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

When the integrated broadband high-voltage amplifier outputs high-frequency and large-amplitude signals, the internal temperature of the amplifier will rise sharply, resulting in a sharp deterioration in performance. At the same

Method used

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  • Composite amplifier
  • Composite amplifier

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Embodiment

[0038] Please refer to figure 1 , figure 1 It is a structural diagram of a composite amplifier in an embodiment, including: a signal input terminal 1 , a high frequency coupling module 2 , a DC amplification module 6 , a broadband amplification module 3 , an output driver module 4 and a signal output terminal 5 .

[0039] Wherein, the input end of the high-frequency coupling module 2 is connected to the signal input end 1, and is used to isolate the DC signal and the low-frequency signal in the signal input by the signal input end 1, and output the high-frequency signal in the input signal; The high-frequency coupling module 2 in the embodiment is a first capacitor C1, which isolates the DC signal and the low-frequency signal of the signal input at the signal input terminal through the first capacitor C1.

[0040] The input terminal of the DC amplification module 6 is connected to the signal input terminal 1, and is used to amplify the DC signal and the low-frequency signal i...

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Abstract

The invention discloses a composite amplifier. Voltage amplification is carried out on a direct current signal, a low-frequency signal and a high-frequency signal of input signals through a direct current amplification module and a broadband amplification module respectively, wherein the direct current amplification module adopts a high-precision operational amplifier. The amplification times of the direct current and low-frequency signals are adjusted through a first feedback module. The characteristic of high direct current precision is realized. The broadband amplification module amplifiesthe high-frequency signal and an output signal of the direct current amplification module by adopting amplification devices such as a transistor and the like. The characteristic of high bandwidth is realized. The transistor has good heat dissipation performance, can bear higher voltage , and has the characteristic of high voltage. The impedance of an output signal of the amplified signal is reduced through an output driving module. The output driving capability of the composite amplifier is improved, and the amplification factor of a high-frequency signal is adjusted through a second feedbackmodule, so that the composite amplifier has the characteristics of high bandwidth, high precision, high driving capability and high direct current precision at the same time.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a composite amplifier. Background technique [0002] An amplifier is a device that can amplify the voltage or power of an input signal, and is an important component for processing signals in electronic technology tools. According to the characteristics of the amplifier, the amplifier is usually divided into different types to highlight some characteristics of the amplifier. For example, high-precision amplifiers refer to those amplifiers with small offset voltage, small temperature drift, and high gain and common-mode rejection ratio; Broadband amplifiers are amplifiers that have a very wide frequency band. [0003] However, various performances of amplifiers are mutually restricted. For example, high-precision amplifiers do not have high-bandwidth characteristics, and broadband amplifiers do not have high-voltage characteristics. Therefore, there is an urgent need for a...

Claims

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Application Information

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IPC IPC(8): H03F1/34H03F3/68
CPCH03F1/34H03F3/68
Inventor 林辉浪陈报宋民
Owner SHENZHEN CITY SIGLENT TECH
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