| 摘要 |
PURPOSE:To miniaturize hardware and to reduce the degradation in performance due to the change of circumstances, miniaturization of a device, crowdedness of circuit constituting elements, or the like by applying the output of a specific voltage adder as a control voltage to a voltage controlled clock generator and holding the synchronism based on the integral result of a specific integrator. CONSTITUTION:The output voltage of a reference voltage generator 5 and the sine wave voltage of an oscillator 6 are added by a voltage adder 7, and the result is supplied as the control voltage of a voltage controlled clock generator VCO 4. The output clock of this VCO 4 is used to generate a spread code in a spread code generator PN.GEN 1 in a receiver. Correlations between the spread code generated by the PN.GEN 1 and that of the reception signal are taken by a correlator 2, and the output of the correlator 2 has the DC component cut by a DC cut capacitor 3 and is supplied to an integrator 8. Simultaneously, a digital clock 20 obtained by digitizing the output of an oscillator 6 by a comparator 9 is supplied to the integrator 8 also. The output of this integrator 8 is supplied to the adder 7 to simplify the circuit. |
