A variable reluctance sensor interface (100, 400) for processing a variable reluctance sensor signal, VRS, comprising: an arming comparator (108, 408) including a first input for receiving said variable reluctance sensor signal, VRS, a second input receiving an arming threshold, ATH, and an output providing an armed signal, ARM, when said variable reluctance sensor signal, VRS, reaches said arming threshold, ATH; and an arming circuit (112, 412) for providing said arming threshold, ATH, to said arming comparator (108, 408), wherein said arming circuit (112, 412) is provided to reset said arming threshold, ATH, to a predetermined maximum level, ATH MAX, in response to assertion of a reset signal, RST, and wherein said arming circuit (112, 412) is provided to decrease said arming threshold, ATH, to a predetermined minimum level, ATH MIN, proportional to 1/t after being reset, wherein t denotes elapsed time, wherein said variable reluctance sensor interface (100, 400) further comprises: a detect comparator (110, 410) having an input for receiving said variable reluctance sensor signal, VRS, and is arranged to output a crossing signal, ZD, when said variable reluctance sensor signal, VRS, reaches a reference level, REF; and a detect circuit (114, 414) arranged to receive said armed signal, ARM, and said crossing signal, ZD, output from the detect comparator (110, 410), wherein said detect circuit (114, 414) is arranged to provide a detect signal, CD, when said crossing signal, ZD, is provided after said armed signal, ARM, is provided, wherein said detect signal, CD, is used as said reset signal, RST. an arming comparator (108, 408) including a first input for receiving said variable reluctance sensor signal, VRS, a second input receiving an arming threshold, ATH, and an output providing an armed signal, ARM, when said variable reluctance sensor signal, VRS, reaches said arming threshold, ATH; and an arming circuit (112, 412) for providing said arming threshold, ATH, to said arming comparator (108, 408), wherein said arming circuit (112, 412) is provided to reset said arming threshold, ATH, to a predetermined maximum level, ATH MAX, in response to assertion of a reset signal, RST, and wherein said arming circuit (112, 412) is provided to decrease said arming threshold, ATH, to a predetermined minimum level, ATH MIN, proportional to 1/t after being reset, wherein t denotes elapsed time, wherein said variable reluctance sensor interface (100, 400) further comprises: a detect comparator (110, 410) having an input for receiving said variable reluctance sensor signal, VRS, and is arranged to output a crossing signal, ZD, when said variable reluctance sensor signal, VRS, reaches a reference level, REF; and a detect circuit (114, 414) arranged to receive said armed signal, ARM, and said crossing signal, ZD, output from the detect comparator (110, 410), wherein said detect circuit (114, 414) is arranged to provide a detect signal, CD, when said crossing signal, ZD, is provided after said armed signal, ARM, is provided, wherein said detect signal, CD, is used as said reset signal, RST. a detect comparator (110, 410) having an input for receiving said variable reluctance sensor signal, VRS, and is arranged to output a crossing signal, ZD, when said variable reluctance sensor signal, VRS, reaches a reference level, REF; and a detect circuit (114, 414) arranged to receive said armed signal, ARM, and said crossing signal, ZD, output from the detect comparator (110, 410), wherein said detect circuit (114, 414) is arranged to provide a detect signal, CD, when said crossing signal, ZD, is provided after said armed signal, ARM, is provided, wherein said detect signal, CD, is used as said reset signal, RST.