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中文摘要：
设计了一种应用于自动增益控制放大器（AGC）的电流镜结构型峰值检测器。采用两个不同泄放电流的基本检测电路,并引入由比较器和与门构成的自适应控制电路,克服了传统峰值检测器中电容电荷泄放电流过小导致响应时间过长和电容电荷泄放电流过大导致检测结果波动这两个矛盾问题。采用SMIC 0.18μm CMOS工艺进行了仿真。后仿真结果表明,该峰值检测器能更好地跟踪输入信号的幅度变化,与传统峰值检测器相比,在相同条件下响应时间缩短了30μs。
英文摘要：
A peak detection circuit with current mirror architecture was presented for the applications of automatic gain control. Two basic detection circuit with different charge discharge currents were used,and an adaptively control circuit which was consisted of comparators and AND gates was introduced. It overcame the two contradictory issues that in traditional peak detection circuits,when the capacitive charge discharged currents were much small,the response times would be much long,and when the capacitive charge discharge currents were much large,the fluctuation of detection results would be much great. The proposed circuit was designed and simulated in SMIC 0. 18 μm CMOS technology. The post-simulation results showed that the amplitude variations of input signals could be tracked rapidly by the proposed peak detection circuit,and the response time had been reduced by 30 μs compared with that of traditional peak detection circuits in same conditions.
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