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Transconductance amplifier

A transconductance amplifier and amplifier technology, applied in the field of transconductance amplifiers, can solve the problems of increasing the difficulty of implementation, reducing the problem, and achieve the effects of simple implementation, high internal modulation performance, and low noise internal modulation performance

Active Publication Date: 2014-11-26
NXP BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The supply voltage of CMOS decreases with each next technology node, and this increases the difficulty of implementation

Method used

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  • Transconductance amplifier
  • Transconductance amplifier
  • Transconductance amplifier

Examples

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Embodiment Construction

[0041] The present invention provides a transconductance amplifier comprising a collection of amplifier stages. Divide the amplifier of the last stage into sections with specific ratios, where one or more sections are used to deliver one or more output currents and one section is used to deliver a feedback current to the input.

[0042] image 3 A simplified diagram of a low noise transconductance amplifier without an input is shown.

[0043] The circuit has an output stage comprising a PMOS transistor MP and an NMOS transistor MN connected in series between supply rails vdd, vss through 2 feedback resistors 2.Rfs. The connected drain terminals of MP and MN form an output node. Each transistor has a gate controlled by a respective operational amplifier OAp, OAn. There is a negative feedback path from the source of each transistor to the inverting terminal of the corresponding operational amplifier. The input voltage is connected to the non-inverting input terminals of the ...

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Abstract

A transconductance amplifier comprises a set of amplifier stages. The last stage of the amplifier is split with a certain ratio whereby one part is used to deliver output current and other part to deliver feedback current to the input.

Description

technical field [0001] The present invention relates to transconductance amplifiers. In particular, the present invention relates to a transconductance amplifier that can be integrated into CMOS. Background technique [0002] The semiconductor industry is rapidly converging on mainstream CMOS. Economies of scale, high gate density, and high switching speeds make CMOS an ideal process for high-complexity, low-cost products. [0003] The need for more features and functionality at low cost has led to a trend towards configurable receiver structures in CMOS that utilize greater degrees of digital signal processing. Increased switching rates give higher bandwidth, and loose configurability potentially allows digital compensation and correction of analog imperfections due to digitization earlier in the signal chain. [0004] Wideband receiver architectures are challenging relative to the required analog circuit performance. The supply voltage of CMOS decreases with each next ...

Claims

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Application Information

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IPC IPC(8): H03F3/45
CPCH03F3/211H03F1/342H03F2203/45511H03F2203/45288H03F2200/456H03F2003/45008H03F3/193H03F2200/453H03F3/45179H03F2200/294H03F2200/451H03F3/45475
Inventor 扬·范信德瑞约翰内斯·胡伯图斯·安托尼奥斯·布雷克尔曼斯
Owner NXP BV
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