| 摘要 |
<p>PURPOSE:To limit the calorific value of a heating element and clearly record analog waveforms by alternately masking continuous dot signals having the same dot number so that only one dot is moved in every sampling alternately. CONSTITUTION:Inputted analog signals are successively sampled by an AD converter 1 and converted into number and position signals corresponding to those in a thermal head 40 by a dot converter 2 to be supplied to a dot compensating circuit 10. The circuit 10 generates signals having numbers from a smaller dot number out of continuous two sampling values to the dot number obtained by adding three to said larger dot number in every sampling. A mask circuit 20 is provided with memories 21-23 of which stored contents are successively moved and outputs from a mask signal generating circuit 24 are alternately selected through a switch 25 and an inverter 26 synchronously with the reading-out from said memories. Out of the signals stored in the memory 22, the signals overlapped to their front and back signals are alternately masked and supplied to the head 40.</p> |
