Patent ID: 6211670
Filing Date: 2001-04-03
Classification: G01P,H03K

Abstract:
A magnetic sensing device comprising:a magnetic sensor outputting a first analog signal; anda digital circuit including:an input signal conditioning circuit inputting said first analog signal, said input signal conditioning circuit outputting a second analog signal as a variant of said first analog signal;a dynamic reference threshold generator inputting said second analog signal, said dynamic reference threshold generator outputting a reference signal,wherein said reference signal equates a percentage of said second analog signal in response to a detection of a first signal feature of said second analog signal during a cycle of said second analog signal, andwherein said reference signal equates a fixed percentage of one of a pair of peak amplitudes of said second analog signal in response to a detection of a second signal feature of said second analog signal during a cycle of said second analog signal,; andan output format generator inputting said reference signal and said second analog signal, said output format generator outputting a digital signal, said digital signal equating a first logic signal level in response to said second analog signal being greater than said reference signal, said digital signal equating a second logic signal level in response to said second analog signal being less than said reference signal.