| 摘要 |
The present invention relates to a ratio meter control device utilising an input signal whose frequency is proportional to a parameter to be visualised, characterised in that it comprises a counter 140 which receives on its counting input a clock signal Fe of fixed frequency, and on its control input a signal whose frequency is linked with the frequency of the input signal, so that the counter 140 counts the pulses from the clock signal during the period of the signal applied to its control input, and a divider 150 which divides a programmable constant E(e) by the signal output by the counter 140, so that a digital signal representing the frequency of the input signal is provided at the output of the divider 150. <IMAGE>
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