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A transimpedance amplifier, chip and communication equipment

A technology of transimpedance amplifier and operational amplifier, applied in the field of transimpedance amplifier, chip and communication equipment, can solve the problem of not improving filtering performance

Active Publication Date: 2019-09-20
HUAWEI TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The application provides a transimpedance amplifier, a chip and a communication device to solve the problem that the transimpedance amplifier in the prior art cannot reduce power consumption while improving filtering performance

Method used

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  • A transimpedance amplifier, chip and communication equipment
  • A transimpedance amplifier, chip and communication equipment
  • A transimpedance amplifier, chip and communication equipment

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Embodiment Construction

[0034] The term "and / or" in the embodiment of the present application is only an association relationship describing associated objects, which means that there may be three relationships, for example, A and / or B, which can mean: A exists alone, and A and B exist at the same time , there are three cases of B alone. In addition, the character " / " in the embodiment of the present application generally indicates that the contextual objects are an "or" relationship.

[0035] The embodiments of the present application will be further described in detail below in conjunction with the accompanying drawings.

[0036] The transimpedance amplifier is used to convert the current signal into a voltage signal, which can be integrated into the chip and applied in the communication equipment, for example, applied to the receiving part of the sensor in the communication equipment, or applied to the radio frequency transceiver system of the communication equipment, etc.

[0037] Since only one...

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Abstract

A transimpedance amplifier, a chip and a communication device are used to solve the problem that the current transimpedance amplifier cannot improve the filtering performance while reducing power consumption. The first circuit, the second circuit and the third circuit included in the transimpedance amplifier are composed of Composed of source devices, the first circuit and the second circuit are connected to the current source, the operational amplifier and the third circuit respectively, the first circuit is used to receive the first current and provide the third voltage for the third circuit and filter and shape the first current and then converted to the first voltage output; the second circuit is used to receive the second current and provide the fourth voltage to the third circuit and convert the second current into a second voltage output after filtering and shaping; the third circuit is used to cooperate with the first The circuit and the second circuit perform shaping filtering; the operational amplifier is used to provide a small signal virtual point for the first circuit. Due to the addition of the third circuit, compared with the existing transimpedance amplifier, the filter performance is improved while reducing power consumption.

Description

technical field [0001] The present application relates to the field of chip technology, in particular to a transimpedance amplifier, a chip and communication equipment. Background technique [0002] A transimpedance amplifier (Trans-Impedance Amplifier, TIA) can be used to convert a current signal into a voltage signal, and is widely used in the receiving part of the sensor and the radio frequency transceiver system. [0003] At present, the commonly used TIA is as Figure 1a TIA of the first-order active structure shown and as Figure 1b TIA of the second-order active structure shown. Specifically, although Figure 1a The TIA shown in the first-order active structure includes only one op-amp, compared to the Figure 1b For the TIA with the second-order active structure shown, it has an advantage in terms of power consumption, but the filtering ability is poor, such as Figure 1b The TIA with the second-order active structure shown has a strong suppression effect on out-o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F3/45
CPCH03F3/45475H03F1/083H03F3/195H03F3/245H03F2200/411H03F2200/451H03F2203/45138H03F2200/66H03F2200/234H03F2203/45526H03F2200/144H03F2200/138H03F2200/267H03F2200/171H03F3/45071
Inventor 卫宝跃邸岳淼
Owner HUAWEI TECH CO LTD
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