A RC filter circuit is disclosed which includes a first time constant circuit composed of a first resistor and a first capacitor, a switch circuit transferring, when conductive, an input signal to the first time constant circuit, and a pulse generator generating and supplying a pulse signal to the switch...http://www.google.es/patents/US5473278?utm_source=gb-gplus-sharePatente US5473278 - Filter circuit including a switch circuit inserted between input terminal and RC filter
Filter circuit including a switch circuit inserted between input terminal ...
