| 摘要 |
PURPOSE:To reduce the hardware scale of a coefficient multiplying part constituting the loop filter and to miniaturize the loop filter concerning the loop filter constituting the digital PLL circuit of a radio MODEM, for example, or the digital loop filter used as the CR filter of a sub synchronizing detection circuit. CONSTITUTION:Concerning this digital loop filter provided with the coefficient multiplying part for multiplying a coefficient to an input signal, the coefficient multiplying part is provided with a multiplier 10 for multiplying the coefficient to the input signal and a bit shift circuit 11 for shifting the digit position of an output signal from the multiplier 10. |
