| 摘要 |
An apparatus for use in reading magnetic characters which are printed on a carrier (12) such as a financial document or a cheque, the character waveforms include positive and negative peak values and substantially zero values occuring at predetermined times for a predetermined character. A shaft encoder (25) is used to develop a nominal count in alternately operative counters (A-1, A-2), which count is correlated to the velocity of the carrier (12). The nominal count is used to generate a timing clock (CL-1 to CL-7) which is used to clock the positive and negative peak values and substantially zero values into registers for subsequent character recognition. The occurrence of the timing clock (CL-1 to CL-7) is adjusted by utilizing the occurrence of a positive or negative peak itself. |
