Patent ID: 7432782
Filing Date: 2008-10-07
Classification: H03H

Abstract:
1. A signal splitter comprising: a first connecting port adapted to be coupled to an incoming telephone line and having first and second terminals; a second connecting port adapted to be coupled to a telephony instrument and having first and second terminals; a low-pass filter circuit having first and second input ends connected electrically and respectively to said first and second terminals of said first connecting port, and first and second output ends connected electrically and respectively to said first and second terminals of said second connecting port, said low-pass filter circuit being capable of permitting a low-frequency component of an incoming signal in the incoming telephone line to pass therethrough to said second connecting port; and a coupling circuit including whereby, said coupling circuit is operable to generate a coupling signal at said second connecting port to cancel a high-frequency noise signal induced by a high-frequency component of the incoming signal in the incoming telephone line upon said second connecting port.