A Low-Power Single-Phase Dual-Modulous Prescaler
Keywords:
Very Large Scale Integration(VLSI), CMOS, Prescaler, Swallow Counter, Program Counter, Wireless LAN(WLAN), Phase Lock Loop(PLL), Source Coupled Logic(SCL), True Single Phase Clock(TSPC), Extended True Single Phase Clock(E-TSPC), Phase Frequency Detector(PFD), Bluetooth, ZigbeeAbstract
— In this paper, a wideband 2/3 prescaler is verified in the design of proposed wide band multimodulus
32/33/47/48 prescaler. A dynamic logic multiband flexible integer-N divider is designed which uses the wideband 2/3
prescaler, multimodulus 32/33/47/48 prescaler. Since the multimodulus 32/33/47/48 prescaler has maximum operatin g
frequency of 6.2 GHz, the values of Program (P) and Swallow(S) counters can actually be programmed to divide over the
whole range of frequencies. However, the P and S counters are programmed accordingly. The proposed multiband
flexible divider also uses an improved loadable bit-cell for Swallow - counter and consumes a power of 0.96 and 2.2 mW,
respectively, and provides a solution to the low power PLL synthesizers for Bluetooth, Zigbee, IEEE 802.15.4, and IEEE
802.11a/b/g WLAN applications with variable channel spacing.
