Clock signal generating device for smart card reader, has signal generating oscillator functioning in both presence and absence of clock signal from processor of card reader

摘要

An oscillator (301) generates a clock signal (213) and functions in a forced and free modes under the presence and absence of rising or falling edges of another input clock signal (209), respectively. The natural frequency of the oscillator is lower than the frequency of the input clock signal (209). Independent claims are also included for the following: (1) smart card reader; and (2) portable telephone.