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Small signal amplification circuit and chip suitable for laser radar analog front end

An analog front-end, lidar technology, applied in radio wave measurement systems, instruments, etc., can solve the problems of small dynamic range of received signals, inappropriate multi-channel structure, etc., to improve linear dynamic range, improve dynamic range, and facilitate integration. Effect

Pending Publication Date: 2021-05-11
INST OF MICROELECTRONICS CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The invention provides a small signal amplification circuit and chip suitable for the laser radar analog front end, which solves the technical problem that the dynamic range of the received signal of the laser radar receiver analog front end circuit is small and is not suitable for multi-channel structures in the prior art

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  • Small signal amplification circuit and chip suitable for laser radar analog front end
  • Small signal amplification circuit and chip suitable for laser radar analog front end
  • Small signal amplification circuit and chip suitable for laser radar analog front end

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Embodiment Construction

[0038] The embodiment of the present application provides a small signal amplification circuit and chip suitable for the laser radar analog front end, which solves the problem that the dynamic range of the received signal of the laser radar receiver analog front end circuit in the prior art is small and is not applicable to the technology of the multi-channel structure question.

[0039] In order to better understand the above technical solutions, the above technical solutions will be described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solutions of the present application. , rather than limiting the technical solutions of the present application, the embodiments of the present application and the technical features in the embodiments can be combined without conflict....

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Abstract

The invention belongs to the technical field of integrated circuits, and discloses a small signal amplification circuit suitable for a laser radar analog front end. The circuit comprises an input circuit, a pre-amplification circuit, a first-stage voltage amplifier, a second-stage voltage amplifier, a self-triggering enabling control circuit, a self-adaptive gain control circuit, a selector and an output circuit. The pre-amplification circuit is connected with the input circuit; the first-stage voltage amplifier is connected with the pre-amplification circuit; the second-stage voltage amplifier is connected with the first-stage voltage amplifier; the self-triggering enabling control circuit is connected with the second-stage voltage amplifier; the self-adaptive gain control circuit is connected with the pre-amplification circuit and the first-stage voltage amplifier; the self-adaptive gain control circuit is connected with the self-triggering enabling control circuit; the selector is connected with the pre-amplification circuit, the first-stage voltage amplifier and the second-stage voltage amplifier; the selector is also connected with the self-adaptive gain control circuit; and the output circuit is connected with the selector. The circuit provided by the invention has the advantages of a large dynamic range of received signals, a high response speed and a low noise, and can be used for multi-channel integration.

Description

technical field [0001] The invention relates to the technical field of integrated circuits, in particular to a small-signal amplifying circuit and a chip suitable for a laser radar analog front end. Background technique [0002] The analog front-end circuit of the laser radar receiver mostly uses gain control to expand the linear dynamic range of the received echo signal. Among them, the linear mode gain control needs to introduce an external clearing signal, which is generally generated by FPGA or uses the START signal as the clearing signal, but it can only detect and process the first echo signal. The programmable gain control method introduces digital circuits. The structure is complex and the noise is large, which is not conducive to the application of multi-channel. Contents of the invention [0003] The invention provides a small-signal amplifying circuit and chip suitable for the laser radar analog front-end circuit, which solves the technical problem in the prior...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/4861
CPCG01S7/486
Inventor 赵野赵日新
Owner INST OF MICROELECTRONICS CHINESE ACAD OF SCI
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