| 摘要 |
<p>The circuit counts the frequency to convert the counted analog value to a digital value, measures the duty ratio of the frequency using a simple circuit, and can be built in a digital/ analog equipment to self-diagnose the system clock generator of the equipment. It includes a sampling clock generator (23) for receiving the reference clock (MCLK) from a reference clock generator (10) and generating 6 sampling clocks (SF1-SF6), a selector (24) for selecting one input clock and outputting it as a sampling pulse, and a signal width controller (30) for controlling the width of the input signal.</p> |
