| 摘要 |
<p>A coin validating circuit wherein a coin is sensed by at least one coin sensor, the output of which is fed to a threshold detector (30) which detects a minimum change in sensor output and thence enables a peak hold circuit (26) which stores the peak value of the sensor output, and a comparator (36) which compares the stored peak value with a reference signal to enable production of a coin validated signal. <IMAGE></p> |
