| 摘要 |
PURPOSE:To provide the digital PLL device having good accuracy in arithmetic operation even when the low-order bit is cut down in an integrating device. CONSTITUTION:The digital PLL device consists of a phase comparison section 1 comparing the phase difference of a digital input signal, digital voltage control oscillator 4, and loop filter 2. The digital voltage control oscillator 4 is of an integrating device made up of an entire adder 7, to which high-order (k) bits of (n) bit outputted by the loop filter 2 are inputted and the code bit of (n)-bit digital signal is inputted to a carry input terminal. |
