| 摘要 |
A system for reducing structure spurs in multiple modulator fractional-N dividers caused by certain fractional divisors inducing an insufficiently random modulation pattern. The system sums with a first summer a fractional divisor value with an addend that changes periodically. Offset of the fractional divisor value caused by the summed addends is compensated by first subtracting the offset from the fractional divisor value with a second summer. Underflow or overflow of the fractional divisor value is accommodated by incrementing or decrementing an integer divisor value with a third summer connected in series with an integer divisor input of the multiple modulator divider.
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