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Analogue amplification device intended in particular for laser anemometer

An operational amplifier and device technology, applied in the field of analog amplifier devices, can solve problems such as ineffective use, and achieve the effect of significant gain and wide bandwidth

Inactive Publication Date: 2015-09-23
EPSILINE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Considering the state of the art op amps, this configuration cannot be used effectively for signals where the signal changes by very small amounts compared to the average signal value as mentioned above

Method used

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  • Analogue amplification device intended in particular for laser anemometer
  • Analogue amplification device intended in particular for laser anemometer
  • Analogue amplification device intended in particular for laser anemometer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0047] figure 1 A Doppler effect laser anemometer with optical return injection is shown. The anemometer uses the reduced dispersion signal produced by windborne particles to calculate wind speed values.

[0048] figure 1 The laser diode 2 for emitting the laser beam can be identified in . The laser diode 2 comprises an optical cavity in which a light beam is generated. The light beam emitted by the laser diode 2 is focused on the measurement area 6 by the optical system 4 . Particles in the measurement area 6 will reflect the incident light beam, which will be redirected by the optical system 4 towards the laser diode 2 . Thus, the reflected light passes through the laser diode 2 and interacts with the laser light waves in the laser diode 2 optical cavity. In view of the fact that the laser diode 2 is not only transmitted to the front end (i.e. to the optical system 4) but also to the rear end (i.e. to the photodiode 8), the laser beam received by the photodiode 8 corres...

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PUM

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Abstract

An analogue amplification device comprises a first stage with a common base or gate transistor that receives the modulated input current on its emitter or its source and the output signal of this first stage corresponds to the signal of the collector, a second stage formed by a follower amplifier comprising a transistor with a common collector or drain setup, a third stage that comprises a transistor with a common emitter setup, and a fourth stage that is an amplifying stage with means allowing the realization of, on the one hand, an amplification, and on the other hand, a matching of impedance. The device can be applied to a laser anemometer with optical retro-injection.

Description

technical field [0001] The present invention relates to an analog amplification device, which is particularly suitable for use in laser anemometers, for example with optical retro-injection. Background technique [0002] Accordingly, the present invention belongs to the field of electronic devices, more specifically the field of amplifiers. Traditionally, a probe is used to measure the magnitude of a physical quantity. The detector then provides an electrical signal representative of the measured physical magnitude. Some detectors provide signals that can be used directly. For other detectors, the provided signal must be amplified before it can be used. [0003] Therefore, there is a problem for an amplifier to exhibit increased gain, wide bandwidth and low noise at the same time. These amplifiers are used to process signals with very small modulation indices. This means that the signal varies very little relative to the mean value of the signal. Therefore, in any case...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/08H03F3/45H03F3/50
CPCH03F2200/285H03F2203/45594H03F2200/555H03F2200/69H03F2200/405H03F2200/42H03F3/50H03F2203/5036H03F3/45475H03F2203/45544H03F2203/45528H03F3/087H03F2200/72G01P5/26H03F1/56H03F3/45071H03F2200/54H03F2203/45051H03F2203/45112
Inventor 弗朗西斯·博尼拉斐尔·泰塞雷
Owner EPSILINE