The application of operational amplifier is very wide. It's usually applied to signal operation, signal processing and wave generation.

运算放大器的应用非常广，最常见的有信号运算方面的应用、信号处理方面的应用和产生波形方面的应用。

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The simulative circuits of active network elements, analog signal operation and inductors based on current conveyors are systematically researched. A new active floating inductor is proposed.

系统地研究了电流传送器在有源网络元件模拟、模拟信号运算和电感模拟电路中的应用，提出了一种基于电流传送器的新型模拟浮地电感。

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At that point, though, the signal is small compared with the electronic "noise" caused by the machine's operation.

只是在那一刻，信号跟机器运作所产生的电子“噪音”相比，显得相当微小。

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"They have not got their acts together. So I think the Swat operation has sent a very strong signal and if the government now starts an operation in even Waziristan, which is considered as a hard nut, I think it has good chances to succeed."

VOA: standard.2009.09.14

It said Mr ElBaradei hoped that Tehran's response "will equally be positive, since approval of this agreement will signal a new era of co-operation".

BBC: Iran delays reply on nuclear plan

All the same, the recent announcement that two special economic zones will be developed with the co-operation of China might just signal the start of a big change for the stricken country.

ECONOMIST: An opening for Chinese investment in a benighted country

Earlier, French President Jacques Chirac issued his strongest signal yet that France would contribute troops to any operation against Iraq.

BBC: UK to call up army reservists