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US 5,204,833 AGranted
Method and apparatus for recording waveform
AssigneeCanon Kabushiki Kaisha
InventorTadashi Aoki
Life of this patent
Estimating the term…
Abstract
There is provided method and apparatus for recording a waveform. By counting the intervals of change points of a recorded waveform and recording the count data, the waveform can be recorded for a long time.
Claims7
A method of recording a waveform of a digital signal, comprising the steps of:
- detecting change points of a recorded timing waveform of a digital signal;
- converting the plurality of detected change points into converted binary data corresponding to time intervals between respective pairs of said plurality of detected change points;
- inputting the converted binary data in parallel to a memory;
- and
- recording the inputted data in the memory.
2 more elements
An apparatus for recording a waveform of a digital signal, comprising:
- change point detecting means for detecting change points of a recorded timing waveform of a digital signal;
- counting means for counting intervals between respective pairs of detected change points, for converting said intervals into converted binary data;
- and
- memory means for receiving the converted binary data output from the counting means through a plurality of transmission paths corresponding to respective digits of the converted binary data and for recording the received data.
1 more element
An apparatus for recording a waveform of a digital signal, comprising:
- change point detecting means for receiving a recorded timing waveform of a digital signal, for detecting change points of the waveform, and for outputting change point signals;
- counting means of a predetermined number of bits for receiving the change point signals input to the counting means from said change point detecting means and for counting reference clocks of a reference clock signal, and for converting numbers of reference clocks which are counted during intervals between pairs of said plurality of change points into converted binary data;
- and
- memory means for receiving the converted binary data output from said counting means through a plurality of transmission paths corresponding to said predetermined number of bits and for recording the received data.
1 more element
Dependencies are inferred from the claim text.