Gain-variable trans-impedance amplifier integrated circuit for pulse laser range finder echo receiver

A technology of pulsed laser distance measurement and transimpedance amplifier, which is applied in the direction of instruments, electromagnetic wave re-radiation, and measurement devices, can solve the problem that the circuit is susceptible to electromagnetic radiation interference, the circuit power consumption and volume are large, and the laser rangefinder system is not light. Quantization and other issues to achieve the effect of reducing electromagnetic radiation interference, reducing power consumption and volume, and simplifying the gain control loop

Active Publication Date: 2010-10-06
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, the requirements of high precision, high sensitivity and large dynamic range often lead to excessive power consumption and volume of the circuit, which is not conducive to the lightweight, miniaturization and mass production of the laser rangefinder system
At the same time, the external interconnection of the chip makes the circuit more susceptible to electromagnetic radiation interference

Method used

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  • Gain-variable trans-impedance amplifier integrated circuit for pulse laser range finder echo receiver
  • Gain-variable trans-impedance amplifier integrated circuit for pulse laser range finder echo receiver
  • Gain-variable trans-impedance amplifier integrated circuit for pulse laser range finder echo receiver

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Embodiment

[0022] Using 0.6-μm mixed-signal CMOS technology, design a gain-variable transimpedance amplifier integrated circuit with the following input and output requirements: the input pulse photocurrent amplitude range is 0.1μA-10μA, the rise time is 4ns, and the circuit input capacitance is about 5pF. The required output pulse voltage amplitude range is about 1-2V.

[0023] In order to achieve high ranging accuracy, the transimpedance amplifier circuit should keep the rising edge of the pulse signal as short as possible. According to signal theory, the minimum bandwidth required to maintain a 4ns rise time is about 110MHz. At the same time, according to the input and output signal amplitude, the maximum gain that the transimpedance amplifier needs to provide is at least 120dBΩ, and the dynamic range of gain control is at least 40dB.

[0024] The specific implementation plan is as follows:

[0025] 1) The current buffer input stage adopts RGC circuit. Adjust the parameters of each ...

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Abstract

The invention discloses a gain-variable trans-impedance amplifier integrated circuit for a pulse laser range finder echo receiver, belonging to the technical field of integrated circuit design. The integrated circuit is based on the CMOS integration technology, a narrow pulse photo signal generated by a photoelectric detector is converted into a voltage signal via a current buffer and a difference trans-impedance amplifier, the voltage signal is attenuated by an R-2R resistance attenuating network according to a given attenuation times input by digital control, is amplified to a certain amplitude by a broadband voltage amplifier and is in buffer output by an output buffer. The invention has the advantages of realizing single chip integration for a multi-functional module circuit in the existing pulse laser range finder, improving the integrated level of a receiving circuit, lowering batch production cost for the system and being favor of realizing the multi-element laser echo detection at a high integration level.

Description

technical field [0001] The present invention relates to integrated circuit design technology, and specifically refers to a gain-variable transimpedance amplifier integrated circuit used for echo reception of a pulsed laser rangefinder, which is used for the echo narrow pulse photocurrent signal of a pulsed laser rangefinder Transform and amplify. Background technique [0002] Compared with other non-contact ranging methods, pulsed laser ranging has the advantages of simple structure, no need for target cooperation, long range and fast measurement speed, making it widely used in aerospace, military and industrial fields. The pulse laser range finder sends a light pulse to the target, and after being reflected by the target, it is received by the echo receiving channel of the range finder, and the distance between the pulse and the target can be obtained by measuring the time elapsed from the emission of the light pulse to the return to the laser range finder. distance. Puls...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S7/483G01S17/10
Inventor 陈弈刘珊珊舒嵘黄庚华王斌永刘世超
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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