Murata’s GJ8 series of multi-layer ceramic chip capacitors (MLCCs) has been specifically developed to reduce acoustic noise in consumer and industrial electronics applications. Sound can be generated by the MLCCs at the input to the DC-DC converter in a notebook PC, or by capacitors in the control circuit of the LCD module in a mobile phone. This problem is caused by the expansion and contraction of the dielectric element in some MLCCs, which causes the PCB to vibrate at the amplitude of the voltage applied. When the frequency of the voltage applied approaches audio frequencies, a noise can be heard.
Murata’s GJ8 series has been specially designed to reduce this problem and is available with capacitance between 1 and 10µF. The acoustic noise generated by 4.7 to 10µF GJ8 series capacitors represents an improvement of at least 10dB over ordinary MLCCs; for 1µF models the improvement is up to 30dB. The series is available in low-profile models with thicknesses of just 1.25, 1.60 or 2.50 mm depending on capacitance. Rated voltage is up to 50V.
Murata Electronics (UK) Ltd.,
Oak House, Ancells Road, Ancells Business Park, Fleet, Hampshire GU51 2QW , United Kingdom
Tel: +44 (0) 1252 811666
Fax: +44 (0) 1252 811777
Murata is a leading manufacturer of electronics components, modules, and devices. The complete range of this Ceramics Technology house includes ceramic capacitors, resistors/thermistors, inductors/chokes, ceramic resonators, buzzers, sensors and EMI suppression filters. Whilst the company gets 40% of its revenue from its ceramic capacitor products, it is also the world leader in Bluetooth & WiFi Modules, and a key manufacturer of power supplies. Murata also designs and manufactures mobile handset antenna families, piezoelectric actuators for fuel injection systems, short focal length ceramic lenses and speaker products.
Established in 1944, Murata is headquartered in Japan and has European offices in Germany, the Netherlands, the UK, Switzerland, Italy, France, Spain, Denmark, Sweden, Finland and Hungary.
Note: The above text is the public part of the press release obtained from the manufacturer (with minor modifications). EETimes Europe cannot be held responsible for the claims and statements made by the manufacturer. The text is intended as a supplement to the new product presentations in EETimes Europe magazine.