An Ultra Low Power 500MHz Dual Modulus Prescaler

Frequency synthesized tunning system utlizing Phase Locked Loop (PLL) technique has been used in many kinds of communication fields due to the stability and accuracy. Recently this system has been adopted in consumer and communication fields used a battery type supply, for example, cordless telephone and personal radio and so on. Therefore, the drastic improvement concerning about power saving and physical dimensions of the system has been strongly required. However, in the conventional technique, the approach for the reduction of power consumption has been realized at a typical 5V operation.