亚洲知识产权资讯网为知识产权业界提供一个一站式网上交易平台，协助业界发掘知识产权贸易商机，并与环球知识产权业界建立联系。无论你是知识产权拥有者正在出售您的知识产权，或是制造商需要购买技术以提高操作效能，又或是知识产权配套服务供应商，你将会从本网站发掘到有用的知识产权贸易资讯。

返回搜索结果

Lock-In Amplifier - Lock-In amplifier with optimal noise suppression

总结: The dramatic speedup of measurements will result in a more economic use of expensive lab equipment and personnel and allow for the measurement of even weaker signals on a noise background.

技术优势: Supplies optimal noise suppression with tuneable low-pass filtering for many applications.

技术应用: Lock-in amplifiers are widespread in general laboratory environments, the semiconductor industry, and healthcare as a growing market for their use. A vendor offering a lock-in amplifier device that provides the “soft-rectangle window” for cutting down measurement times will certainly have a clear advantage over vendors that provide the standard RC-filters. Any informed lab director will in the future ponder the purchase of a lock-in amplifier with an improved signal-to-noise ratio.

详细技术说明: Lock-In amplifiers are firmly anchored in everyday research. They offer excellent noise suppression for repeating signals. The degree of suppression, however, depends critically on the low-pass filter at the end of the signal processing chain. Until now, simple narrow-band filters are generally used which have an infinite settling time and a suboptimal capability of supressing a white noise background (Fig. 1, showing 6dB, 12dB, 18dB, and 24dB RC-filters). The new ‘soft rectangle’ filters of the invention offer a finite settling time and provably the best RMS spectral width for a desired suppression of a white noise background (Fig. 2). Reaching the same noise level s, these filters considerably cut down measurement times. Fig. 3 compares output of a lock-in amplifier using the new soft rectangle filter with a standard 24 dB RC filter after a switching event. The soft rectangle filter shows a 1.52 improvement in settling time. Even a factor of up to 2.3 compared with a first-order RC-filter and a factor of up to 3.4 compared with a fourth-order Butterworth-filter can be obtained (for a typical 99%-settling time). Moreover, the finite settling time completely eliminates contaminations of the measured data point by a previous data point.

欲了解更多信息，请点击这里