Appeal No. 1996-0452 Application 07/790,618 to persuade us of the proper combinability of Fortuna and Jackson within 35 U.S.C. § 103. Fortuna's focus is to disclose an encoder to encode PAM information into PCM information. It appears the examiner views this basic conversion as a decoding operation for purposes of the claimed invention. Even though Fortuna does teach a comparator for comparing an input signal to a low value range and a separate comparator for comparing the same signal to a high value range, there is no rational basis within 35 U.S.C. § 103 from the teachings of the references or even the reasoning of the examiner to persuade us that the artisan obviously would have provided any type of comparator-type operation from Jackson into Fortuna's system. The examiner's basic view is to add an additional or third comparator function from Jackson's teachings to compare an input with respective low and high threshold levels to determine periods of instability of the signal. The examiner does not persuade us, nor are we able to determine on our own, why the artisan, let alone how the artisan, would 5Page: Previous 1 2 3 4 5 6 7 NextLast modified: November 3, 2007