Method and apparatus for detection of waveform peaks and slopes
AssigneeTexas Instruments Incorporated
InventorsWai-Leung Hon, Henry B. Patterson, Jr.
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Abstract
The invention includes directing an analog electrical signal through a plurality of discrete time delays in order to sequentially introduce cumulative time delays to the electrical signal. The magnitudes of the electrical signal before and after the introduction of each of the time delays are compared, and a plurality of pulse signals are generated in response to the comparisons. Logic circuitry is responsive to the logic conditions of the pulse signals to generate output signals indicative of the amplitude peaks or slopes of the electrical signal.
Claims9
A system for providing a digital representation of an input analog waveform, comprising:
- a. a plurality of comparator means for comparing various magnitudes of said analog waveform with later occurring magnitudes thereof;
- b. first logic means responsive to the outputs of said comparator means according to a first prescribed logic code to indicate the occurrence of a positive wave peak;
- and
- c. second logic means responsive to the outputs of said comparator means according to a second prescribed logic code to indicate the occurrence of a negative wave peak.
A system for determining the wave shape of an analog electrical signal read from a magnetic recording media comprising:
- a. amplifier means connected to receive and amplify said analog electrical signal;
- b. filter means for filtering out high frequency noise from the amplified signal;
- c. time delay means having a plurality of output terminals each representative of a successively increased time delay;
- d. driver means for transmitting the filtered signal through said time delay means;
- e. a plurality of comparator means connected to the output terminals of said time delay means to compare various magnitudes of said electrical signal with later occurring magnitudes thereof and provide logic pulse indications of the results of the comparisons;
- f. first logic means coupled to be responsive to the outputs of said plurality of comparator means according to a first prescribed logic code to indicate the occurrence of a positive wave peak;
- and
- g. second logic means coupled to be responsive to the outputs of said plurality of comparator means according to a second prescribed logic code to indicate the occurrence of a negative wave peak.
Dependencies are inferred from the claim text.