Murata has now added the NFZ18SM series, the smallest size now available, to its NFZ_S series of noise filters that are specifically designed and manufactured for audio line applications and suppress radiation noise with no adverse effects on the sound quality (*1).
Full-digital speakers (*2) are currently attracting a great deal of attention as systems that enable a higher sound quality and higher efficiency (one-eighth of the power consumption) than conventional class D amplifiers to be achieved. The finished product manufacturers in a wide variety of markets have expressed an interest in these products and have started to use them in headphones, speakers, AV navigation systems for vehicles and other such products: as such, high hopes are pinned on their future use in smartphones and tablets as well. As noise filters ideally suited to audio lines that are exemplified by these applications, Murata has been offering its NFZ_S series as a product line-up, but in response to the intensified demand for ever-smaller sizes, the company has now launched a 0603 size component that is the smallest model in the series.
・The new noise filters come in the 0603 size, and achieve an impressively high rated current that exceeds 1A.
・Evaluations performed in actual products and in combination with Y capacitors have revealed that the noise filters combine a radiation noise suppression effect that satisfies the CISPR22 standard (*3) with a THD+N performance on a par with the shorted status even with an applied voltage of 0.5W.
・Only one model is being released at the present time, but Murata will consider creating products with different impedance levels if there is demand.
Radiation noise suppression in the audio lines of filter-less class D amplifiers, full digital speakers and other such products
Filed Under: ALL INDUSTRIES, Capacitors, Wireless