Patent ID: 6987857
Filing Date: 2006-01-17
Classification: H04B,H04H

Abstract:
1. A cross fader including: a first optocoupler for receiving and transmitting a first signal, said first optocoupler including a first space through which said first signal is optically communicated; a second optocoupler for receiving and transmitting a second signal, said second optocoupler including a second space through which said second signal is optically communicated; and a blade shutter with a range of travel, wherein at a first position in said range of travel, said blade shutter is inserted into said first space thereby at least attenuating said first signal, and wherein at a second position in said range of travel, said blade shutter is inserted into said second space thereby at least attenuating said second signal; and wherein an output signal is generated which is the sum of a first fraction of said first signal plus a second fraction of said second signal, wherein said first position is at a first end of said range of travel, wherein said second position is at a second end of said range of travel, wherein intermediate positions within said range of travel continuously vary attenuation of said first signal and said second signal, wherein movement of said blade shutter in a first direction increases said first fraction while decreasing said second fraction and wherein movement of said blade shutter in a second direction, opposite to said first direction, decreases said first fraction while increasing said second fraction.