Question

A microprocessor chip uses the frequency-multiplying PLL circuit shown in Figure 12.23 on page 570 to generate an on-chip clock of 1.0 GHz from an 80-MHz input from a crystal oscillator. What are the values of M and N?

Book: CMOS VLSI Design, 4/e, Addison Wesley 2011

Clock Buffers Output Clock Oscillator Clock L (fin) outin PDLF Frequency Control out/N FIGURE 13.23 Frequency multiplication using a PLL

Answer 1

fo\p- 25 25 2. SI'de, the minimum þ。wsle Value Ao1 Ne 25