| 摘要 |
PROBLEM TO BE SOLVED: To provide a frequency divider circuit for bringing a duty ratio required to produce a phase difference of 90-degrees at high frequency PSK modulation to 50%. SOLUTION: The frequency divider circuit includes: a multiplier circuit one input signal of which is an input clock acting like a reference signal to produce an operation timing of various electronic circuits; a 1/2 frequency divider circuit for receiving an output of the multiplier as a new clock input; and a flip-flop circuit for using an input clock to decide the timing of a data signal being an output of the frequency divider circuit, wherein an output of the flip-flop circuit is given to the multiplier circuit as other input signal and a frequency division signal is obtained from the flip-flop circuit. COPYRIGHT: (C)2004,JPO
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