| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce the cost by frequency-dividing an oscillated frequency from an oscillation circuit and supplying the frequency-divided frequency signal to a control circuit as a clock pulse signal to use two oscillation circuits of the transmitter otherwise required in common resulting in unifying them. SOLUTION: A control circuit 24 is operated based on switching of a plurality of function selector switches SW1, SW2 and a clock pulse and provides the output of a code signal corresponding to the function of the function selector switches SW1, SW2 attended with the ON-operation of the function selector switches SW1, SW2. An oscillation circuit 23 outputs a pulse obtained by modulating an oscillating frequency based on the modulation signal from a modulation circuit 22 to generate the modulation signal corresponding to the code signal outputted from the control circuit 24. Then a frequency divider circuit frequency- divides the oscillated frequency from the oscillation circuit 23 and supplies the resulting frequency signal to the control circuit 24 as a clock pulse. An output circuit converts the modulated output signal from the oscillation circuit 23 into a radio wave, which is sent from an antenna ANT.</p> |
