An analogue non-linear dynamic filter having a substantially semisoidal input-output transfer characteristic with a trough at a first constant level and a peak at a second constant level, and a continuously variable transfer function between the first and second levels. The first level, which is substantially zero, is defined by a small area of the input signal in the vicinity of the zero crossings thereof, and is obtained by subtracting the output of a first clipper circuit (12) from the input signal. The second constant level is obtained by applying the signal to a second clipper circuit (14) and the signal is then applied to a rectifier (16) before being multiplied by the input signal to attain a variable gain function.
申请公布号
WO2005101658(A1)
申请公布日期
2005.10.27
申请号
WO2005IB51146
申请日期
2005.04.07
申请人
KONINKLIJKE PHILIPS ELECTRONICS N.V.;GOOSSENS, HENDRIKUS, M., W.;DE VRIEZE, GUIDO, E.;HEERTJES, MARCEL, F.
发明人
GOOSSENS, HENDRIKUS, M., W.;DE VRIEZE, GUIDO, E.;HEERTJES, MARCEL, F.