| 摘要: |
| 针对热释电红外探测中微信号放大时的低信噪比问题,在分析热释电红外探测器及前置放大电路噪声来源的基础上,提出了一种热释电红外探测前置放大电路.电路仿真表明,文中所设计的前置放大电路具有低频特性好、高信噪比、高增益的特点,能有效放大微弱信号. |
| 关键词: 热释电探测器 前置放大器 噪声分析 电路设计 仿真 |
| DOI：10.3969/j.issn.1001-893X. |
| Received:September 18, 2006Revised:December 26, 2006 |
| 基金项目: |
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| Noise Analysis of the BST Film Infrared Detector and Pre-amplifier Circuit Design |
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| Abstract: |
| According to the low SNR in the pyroelectric IR detector and based on the analysis of the generation source of circuit noise, a pre - amplifier circuit is presented in this paper. The results of the circuit simulation show that the weak IR signal can be amplified with good low frequency characteristics, high SNR and high gain. |
| Key words: pyroelectric detector pre - amplifier noise analysis circuit design simulation |
