Patent ID: RE43374

Claim:
An apparatus for generating an electrical signal for use in biomedical applications, said signal based on at least four timing intervals T 1 -T 4 , said apparatus comprising: means for generating a set of at least four timing intervals T 1 -T 4 , said timing intervals having approximately the relationships (a) (2×T 2 )≦T 1 ≦(20×T 2 ). (b) 50 μsec≦(T 1 +T 2 )≦5000 μsec, (c) T 3 ≧(10×T 1 ), and (d) 0≦T 4 ≦500 msec; and means for combining said timing intervals into an electrical signal having an amplitude , wherein said generating means is configured to produce a plurality of paired values of said intervals T 1 and T 2 ; and means for selecting one of said paired values .