Patent ID: 6097889
Filing Date: 2000-08-01
Classification: G06F,H03K

Abstract:
A signal processing apparatus comprising:a first path for propagating a first path signal A having components A.sub.k1, A.sub.k2, A.sub.k3 in a first direction;a second path for propagating a second path signal R having components R.sub.k1, R.sub.k1+1 in the first direction;a third path for propagating a third path signal L having components L.sub.k3, L.sub.k3-1 in a second, opposite, direction;means for receiving first control signal C*.sub.1, second control signal C*.sub.2, third control signal C*.sub.3 and fourth control signal C*.sub.4 for modifying the characteristic of one or more of the first, second, and third paths;in the first path, at least a first stage, a second stage, and a third stage, said first stage providing component A.sub.k1 to said second stage, said second stage providing component A.sub.k2 to said third stage, said third stage providing component A.sub.k3, a first logic arrangement modifying said component A.sub.k2 to A.sub.k2+1 =A.sub.k2 xor (R and C*.sub.3) xor (L and C*.sub.4);in the second path, at least a second logic arrangement receiving component A.sub.k1 and modifying R.sub.k1 to R.sub.k1+1 =(A.sub.k1 and C*.sub.1) xor R.sub.k1 ; andin the third path, at least a third logic arrangement receiving component A.sub.k3 and modifying L.sub.k3 to L.sub.k3-1 =(A.sub.i3 and C*.sub.2) xor L.sub.k3 ; wherein said control signals thereby activate said first and second stages to selectively operate as part of a TYPE 1 linear feedback shift register or of a TYPE 2 linear feedback shift register or both.